PAPER A Large-Swing High-Driving Low-Power Class-AB Buffer Amplifier with Low Variation of Quiescent Current
|
|
- Conrad Bell
- 5 years ago
- Views:
Transcription
1 1730 IEICE TRANS. EECTRON., VO.E87 C, NO.10 OCTOBER 2004 PAPER A arge-swing High-Driving ow-power Class-AB Buffer Amplifier with ow Variation of Quiescent Current Chih-en U a, Nonmember SUMMARY A large-swing, high-driving, low-power, class-ab buffer amplifier, which consists of a high-gain input stage and a unity-gain class- AB output stage, with low variation of quiescent current is proposed. The low power consumption and low variation of the quiescent output current are achieved by using a weak-driving and a strong-driving pseudo-source followers. The high-driving capability is mainly provided by the strongdriving pseudo-source follower whose output transistors are turned off in the vicinity of the stable state to reduce the power consumption and the variation of output current, while the quiescent state is maintained by the weak-driving pseudo-source follower. The error amplifiers with sourcecoupled pairs of the same type transistors are merged into a single error amplifier to reduce the area of the buffer and the current consumption. An experimental prototype buffer amplifier implemented in a 0.35-µm CMOS technology demonstrates that the circuit dissipates an average static power consumption of only µ with the standard deviation of only 3.4 µ, which is only 0.874% at a power supply of 3.3 V, and exhibits the slew rates of 2.18 V/µs and 2.50 V/µs for the rising and falling edges, respectively, under a 300 Ω/150 pf load. Both of the second and third harmonic distortions (HD2 and HD3 are 69 db at 20 khz under the same load. key words: large-swing, high-driving, class-ab buffer amplifier, variation of quiescent current, output driver, pseudo-source follower 1. Introduction The class-ab buffer amplifier is widely used for driving heavy resistive or capacitive loads [1] [5]. To achieve the extended voltage swing, the output transistors should be connected in a common-source configuration. The quiescent current of the output transistors should be small, while the dynamic current should be as large as possible. The gates of the two output transistors are normally driven by two in-phase ac signals separated by a dc voltage. For example, Hogervorst et at. [4], [5] proposed a two-stage, compact, power-efficient 3 V CMOS operational amplifier, in which the output stage is biased by a floating class-ab control. angen et at. [6] also proposed compact low-voltage power-efficent operational amplifier cells for VSI, in which a class-ab control is used to bias the output transistors. The above amplifiers are compact and power-efficient. Another approach, which employs a pseudo source follower shown in Fig. 1 to realize class-ab CMOS buffer amplifiers, have been widely used for a large voltage swing output. It is composed of a pair of complementary commonsource transistors with two feedback loops consisting of a Manuscript received January 5, Manuscript revised May 26, The author is with the Department of Electrical Engineering, National Chi Nan University, Taiwan, R.O.C. a cwlu@ncnu.edu.tw This work was supported by the National Science Council of Taiwan, R.O.C., under Contract NSC E Fig. 1 Conventional class-ab buffer amplifier. pair of complementary error amplifiers [7], [8]. This offers a wide output voltage swing and a large ratio between the maximum transient current (class B current and the quiescent current. However, the quiescent current of the output common-source transistors may have a large variation due to the random input-referred offset voltage of the error amplifiers. It varies proportionally with the product of the input-referred offset voltage, the gain of the error amplifier, and the transconductance of the output transistor. Some approaches have been proposed to overcome this problem. Brehmer et at. [8] proposed a feedback circuit inserted in the pseudo source follower to control the dc bias current in the output drivers. Fisher [9] combined a source follower and the pseudo source follower to reduce the variation of the output current. Although the above approaches could alleviate the variation of quiescent current, the additional circuit draws more current and occupies more area. Kih et at. [10] used a low-gain, bias-controlled amplifier as the error amplifier to minimize the variation of the quiescent output current. ith this configuration, an input offsetvoltageof 2mV causes the output quiescent current to change by about 16%. The variation of the quiescent current is reduced but it will be larger for a larger value of input-referred offset voltage. In this work, a large-swing high-driving class-ab buffer amplifier employing two pseudo-source followers is proposed. One of the pseudo-source followers is designed as a weak-driving pseudo-source follower. The other pseudosource follower features a strong-driving capability. In the vicinity of the stable state, only the weak-driving pseudosource follower with small size output transistors is operated to reduce the variation of the quiescent output current. However, in the transient state, the driving capabil-
2 U: A ARGE-SING HIGH-DRIVING O-POER CASS-AB BUFFER AMPIFIER 1731 ity is mainly provided by the strong-driving pseudo-source follower, which has large size output transistors. The quiescent current of the output transistors is independent of supply voltage variations. The additional error amplifiers are merged with the original error amplifiers to reduce the area of the buffer amplifier and the power consumption. The proposed buffer amplifier is designed to work at voice band frequencies for the telecommunication and audio applications. 2. Proposed Class-AB Buffer Amplifier The proposed complete structure of class-ab buffer amplifier, as shown in Fig. 2, consists of a high-gain input stage and a unity-gain class-ab output stage. The input stage is a conventional two-stage amplifier, which is composed of a differential amplifier and a common source amplifier. The unity-gain class-ab output stage employs two pseudo-source followers, in which each pseudo-source follower consists of two complementary error amplifiers and two output transistors. One of the pseudo-source followers is designed as a weak-driving buffer in which the sizes of the output transistors (Mp and Mn are small. The other pseudo-source follower features a strong-driving bufferwith intentionally built-in offset voltages in the error amplifiers and large output transistors (Mp and Mn. The driving capability of the proposed buffer amplifier is mainly provided by this strong-driving pseudo-source follower. However, in the vicinity of the stable state, the output transistors of the strong-driving buffer are turned off, and only the weakdriving pseudo-source follower is active. Then the strongdriving pseudo-source follower will not cause the variation of the quiescent current. The quiescent output current varies only with the product of the input-referred offset voltage, the gain of the error amplifiers, and the transconductance of the output transistors of the weak-driving pseudo-source follower. Since the transconductances of the output transistors (Mp and Mn are reduced, the variation of the output quies- cent current due to the random input-referred offset voltage of the error amplifiers can be greatly reduced. In order to enable the error amplifiers to be operated with input voltages near the negative supply, source-coupled pairs of PMOS transistors are employed to drive the output NMOS transistors (Mn and Mn and vise versa with input voltages near VDD. Although two additional error amplifiers are introduced in the proposed buffer amplifier, the error amplifiers with source-coupled pairs of PMOS transistors are merged into a single error amplifier to reduce the area of the buffer and the current consumption. At the same time, the error amplifiers with NMOS-input transistors are also merged into a single error amplifier. The schematic of the merged source-coupled pair of PMOS transistors with its corresponding output transistors is shown in Fig. 3. The gates of M13 and M14 are connected as the inverting input terminal of the error amplifier, while the gate of M is the noninverting input terminal. The merged source-coupled pair, which is biased by the constant current source, is actively loaded by the current mirror (M15 M17. The aspect ratio of M13 is designed to be the same as that of M, but the / of M14 is chosen to be a little bit smaller than that of M, i.e., = (1 13 = (2 14 In the stable state, the voltage of the noninverting terminal is equal to that of inverting node. The source-to-gate voltages of the source-coupled pairs of PMOS transistors have the same value. Hence, the current flowing in M is equal to that flowing in M13. However, the current in M14 is smaller than that in M due to the smaller transistor size in M14. The currents in M M14 are given as: Fig. 2 Proposed complete structure of class-ab buffer amplifier. Fig. 3 Schematic of the merged source-coupled pair of PMOS transistors with its corresponding output transistors.
3 1732 IEICE TRANS. EECTRON., VO.E87 C, NO.10 OCTOBER 2004 I M = I M13 = I M14 = 3 / [1 / 3 / ] Since the currents in M15 and M16 have the same value, the drain voltage of M16, which is connected to the gate of the weak-driving output transistor Mn, is equal to the gate voltage of M15. The quiescent output current of Mn is then mirrored from I M by a size ratio between Mn and M15, i.e., Mn I Mn = I M (5 M15 Since the differential pair is biased by a constant current source,, the quiescent current of the output transistors is independent of supply voltage variations. The gate voltage of Mn still suffers the offset voltage of the error amplifier. The variation of the output current of Mn, I Mn, can be expressed as: (3 (4 I Mn = V OS g m13 (r o13 //r o16 g m,mn (6 where V OS is the input-referred offset voltage of the error amplifier, g m13 and g m,mn are the transconductances of M13 and Mn, respectively, and r o13 and r o16 are the output resistances of M13 and M16, respectively. However, this variation of the quiescent output current is reduced by choosing a small size of Mn. The current in M is also mirrored to M17. However, the current in M14 is smaller than that in M, so M17 will go out of the saturation region and be in the triode region. The i-v curve, as shown in Fig. 4, depicts the operation of M14 and M17, where the intersection of the two solid lines indicates the drain-to-source voltage of M17 in the stable state. Since M17 is in the triode region, its drain-to-source voltage can be approximately expressed as: Fig. 4 The i-v curves of M14 and M17. The intersection (P1 of the two solid lines indicates the drain-to-source voltage of M17 in the stable state. However, the intersection (P2 represents the same voltage in the transient state. I M14 V DS,M17 ( µ n C OX (/ 17 VGS,M17 V tn < V tn + V OS g m14 (r o14 //r o17 (7 where 2I M V GS,M17 = V GS,M15 = µ n C OX 15 + V tn, (8 g m14 is the transconductance of M14, and r o14 and r o17 are the output resistances of M14 and M17, respectively. In order to reduce the static power consumption and the variation of the output quiescent current due to the random offset voltage in the error amplifier, the strong-driving output transistor Mn is designed to be in the cut off region. Therefore the drain voltage of M17, which is connected to the gate of Mn, should be smaller than the value of V tn + V OS g m14 (r o14 //r o17. This can be achieved by decreasing the aspect ratio of M14 or/and increasing the size of M17. hen the voltage of the inverting terminal is increased, the drain voltages of M16 and M17 are reduced. The output transistor Mn is still cut off from the output node. However, when the voltage of the inverting terminal is reduced, say, by a step voltage V 1, the currents in M M14 are given as: V SG13 = V SG14 = V SG + V (9 I M = 1 2 µ ( pc OX VSG Vtp 2 (10 I M13 = 1 2 µ ( pc OX VSG13 Vtp 2 (11 I M14 = 1 2 µ pc OX 1 ( ( VSG14 Vtp 2 ( I M + I M13 + I M14 = (13 The currents in M M14 then can be obtained from Eqs. (9 (13. That is: I M = 3 ( [ 2 V + 2 ( ] (14 V SG V tp 2 V (1 + V SG V tp I M13 = 3 ( [ 2 V + 2 ( ] (15 V SG V tp I M14 = (1 + 2 V V SG V tp V V SG V tp [ 1 ( ] [ 2 ] (16 They can be seen that the current in M is reduced, and the currents in M13 and M14 are increased from the stable state. The current in M is mirrored to M17. As a result, M17 will go into the saturation region. The dashed lines of the i-v curves shown in Fig. 4 show the transient operation of M17. The intersection of the lines is moved from P1 to P2. This
4 U: A ARGE-SING HIGH-DRIVING O-POER CASS-AB BUFFER AMPIFIER 1733 Fig. 5 The complete circuit schematic of the proposed class-ab buffer amplifier. shows that the drain voltage of M17 will increase to turn on the strong-driving output transistor Mn.ThenMn starts to discharge the output node. Due to the negative feedback of the buffer amplifier, the drain voltage of M17 would come back to its stable voltage. hen the drain voltage of M17 is reduced to the level of V tn ± V OS g m14 (r o14 //r o17,mn stops discharging the output node. In this way, the discharge capability of the unity-gain class-ab output stage is mainly provided by the strong-driving output transistor Mn,butthe variation of the output quiescent current is greatly reduced. The merged error amplifier with source-coupled pairs of NMOS transistors works in a similar way as do the merged error amplifier with source-coupled pairs of PMOS transistors. The strong-driving output transistor Mp provides a large charge capability but it is cut off and does not consume any power in the quiescent state. Figure 5 shows the complete circuit schematic of the proposed buffer amplifier where M1 M10 are the high-gain input stage, M11 M17 are the merged error amplifier with source-coupled pair of PMOS transistors, M18 M27 are the merged error amplifier with source-coupled pair of NMOS transistors, Mn, Mp, Mn and Mp are the output driving transistors, and M28 M37 and Ccs1 Ccs5 are for the frequency compensation. The aspect ratios of the transistors and the values of the capacitors are summarized in Table 1. In the error amplifiers, due to the built-in offset voltages, the output transistors of the strong-driving pseudo source follower are cut off every signal period. This deteriorates the crossover distortion characteristics. However, the negative feedback of the pseudo source follower reduces the harmonic distortion by an amount related to the loop gain [11] [13]. Also, The distortion generated by the strongdriving pseudo source follower will be suppressed by the internal feedback loops formed by the compensation capacitors, C cs2 and C cs5 [13]. Hence, the harmonic distortion due Table 1 Device sizes ([µm/µm] for transistors. to the built-in offset voltages is greatly reduced. Figure 6 shows the simulated harmonic distortion of the proposed amplifier, which is connected as a unity-gain buffer under a 300 Ω/150 pf load with a 2.4 V input swing for a 3.3 V supply voltage. The square, rhombus, and triangle lines are for the harmonic distortions HD2, HD3, and THD, respectively. It can be seen that the input-referred built-in offset voltage will not greatly deteriorate the distortion characteristics. The built-in offset voltage is generated from the mismatch design of the error amplifiers (A 1 and A 2. In this work, a mismatch value of 1 µm between M and M14 (also M22 and M24 is used to implement this amplifier. This value of size mismatch generates an input-referred offset voltage of 0.7 mv. This small input-referred built-in offset voltage,
5 1734 IEICE TRANS. EECTRON., VO.E87 C, NO.10 OCTOBER 2004 Fig. 7 The die photograph of the proposed buffer amplifier. Fig. 6 The simulated harmonic distortion of the proposed amplifier, which is connected as a unity-gain buffer under a 300 Ω/150 pf load with a 2.4 V input swing for a 3.3 V supply voltage. which will be amplified by the error amplifier, is enough to turn off the large output transistors (Mp and Mn inthestable state. Hence, the intentionally built-in offset voltages in the error amplifiers will hardly affect the distortion and the proposed amplifier is suitable for continuous-time applications. 3. Experimental Results The proposed output buffer amplifier was fabricated using a 0.35-µm CMOS technology. The die photograph is shown in Fig. 7. The active area of the buffer is only µm 2. Figure 8 shows the measured dc transfer characteristic of the proposed buffer amplifier connected in a unity-gain configuration at a single power supply of 3.3 V with different resistive loads. The voltage swing is V under a 300 Ω resistive load. The average value of the measured offset voltages is 0.7 mv and the standard deviation is 0.7 mv. The quiescent currents of 8 chips, which are measured under a 300 Ω resistive load, are summarized in Table 2. For these 8 samples, the mean value of the quiescent current is 117.8µA, which is smaller than those of [4] [6], [8] [10], and the standard deviation is only 1.03 µa. They feature a mean value of the static power consumption of µ and a standard deviation of 3.4 µ, which is only 0.874% of the mean value. These values are low as compared with those of [10]. The class-ab behaviour is measured and shown in Fig. 9 where the maximum signal current that can be delivered to the load is 36.6 ma but the quiescent current is only 14 µa. The ratio between the maximum signal current and the quiescent current is 2614, which is much larger than those of the amplifiers [8], [10]. Figure 10 shows the measured result of the output with the input of 2.4 V swing of a 50 khz triangular wave of the unity-gain buffer amplifier loaded with 300 Ω resistor in parallel with a 150 pf capacitor. It can be seen that the output basically follows the input. The step responses of the unity-gain buffer amplifier with the same load with the voltage swings of 20 mv Fig. 8 The measured dc transfer characteristic of the proposed buffer amplifier connected in a unity-gain configuration at a single power supply of 3.3 V with different resistive loads. Table 2 Quiescent currents of 8 chips. [µa] Fig. 9 The measured class-ab behaviour of the proposed buffer amplifier.
6 U: A ARGE-SING HIGH-DRIVING O-POER CASS-AB BUFFER AMPIFIER 1735 Fig. 10 The measured result of the output with the input of 2.4 V swing of a 50 khz triangular wave of the unity-gain buffer amplifier loaded with 300 Ω resistor in parallel with a 150 pf capacitor. Fig. 13 The measured results of the output with the input of a large dynamic range (2.4 V pp of a 20 khz sinusoidal wave for the unity-gain buffer amplifier. Fig. 11 The measured step response of the unity-gain buffer amplifier loaded with 300 Ω resistor in parallel with a 150 pf capacitor with the voltage swing of 20 mv. Fig. 14 The measured magnitude spectrum of the proposed buffer amplifier with a 2.4 V pp output swing into a 300 Ω/150 pf load. and 2.4 V are shown in Figs. 11 and, in which Fig. 11 shows the small signal response with 20 mvpp and Fig. shows the large signal response with 2.4 V pp.theslewrates are 2.18 V/µs and 2.50 V/µs for the rising and falling edges, respectively. Figure 13 shows the measured results of the output with the input of a large dynamic range (2.4 V pp of a 20 khz sinusoidal wave for the unity-gain buffer amplifier. Figure 14 shows its magnitude spectrum of the proposed buffer amplifier with a 2.4 V pp output swing into a 300 Ω/150 pf load. Both of the second and third harmonic distortions (HD2 and HD3 are 69 db at 20 khz under the same load. All of the measured results are summarized in Table Conclusions Fig. The measured step response of the unity-gain buffer amplifier loaded with 300 Ω resistor in parallel with a 150 pf capacitor with the voltage swing of 2.4 V. A large-swing, high-driving, low-power, class-ab buffer amplifier, which employs two pseudo-source followers, with low variation of quiescent current has been presented. The
7 1736 IEICE TRANS. EECTRON., VO.E87 C, NO.10 OCTOBER 2004 Table 3 Performance summary. strong-driving pseudo-source follower mainly provides the driving capability during the transient but its output transistors are turned off in the vicinity of the stable state to reduce the power consumption and the variation of the quiescent output current. An experimental prototype buffer amplifier implemented in a 0.35-µm CMOS technology demonstrates that the circuit dissipates an average static power consumption of only µ with the standard deviation of only 3.4 µ, which is only 0.874% at a power supply of 3.3 V, and exhibits the slew rates of 2.18 V/µs and 2.50 V/µsforthe rising and falling edges, respectively, under a 300Ω/150 pf load. Both of the second and third harmonic distortions (HD2 and HD3 are 69 db at 20 khz under the same load. Acknowledgments The author would like to thank National Chip Implementation Center (CIC for chip fabrication. This work was supported by the National Science Council, Republic of China, under Grant NSC E References [1] C.-. u and C.. ee, A low power high speed class-ab buffer amplifier for flat panel display application, IEEE Trans. Very arge Scale Integr. (VSI Syst., vol.10, no.2, pp , April [2] C.-. u, A low power high speed class-ab buffer amplifier for flat panel display driver application, Digest of SID, pp , [3] F. You, S.H.K. Embabi, and E. Sanchez-Sinencio, ow-voltage class AB output amplifiers with quiescent current control, IEEE J. Solid-State Circuits, vol.33, no.6, pp , June [4] R. Hogervorst, J.P. Tero, R.G.H. Eschauzier, and J.H. Huijsing, A compact power-efficient 3 V CMOS rail-to-rail input/output operational amplifier for VSI cell libraries, IEEE ISSCC, pp , [5] R. Hogervorst, J.P. Tero, R.G.H. Eschauzier, and J.H. Huijsing, A compact power-efficient 3 V CMOS rail-to-rail input/output operational amplifier for VSI cell libraries, IEEE J. Solid-State Circuits, vol.29, no., pp , Dec [6] K.-J. de angen and J.H. Huijsing, Compact low-voltage powerefficient operational amplifiers cells for VSI, IEEE J. Solid-State Circuits, vol.33, no.10, pp , Oct [7] A. Torralba, R.G. Carvajal, J. Martinez-Heredia, and J. Ramirez- Angulo, Class AB output stage for low voltage CMOS op-amps with accurate quiescent current control, Electron. ett., vol.36, no.21, pp , Oct
8 U: A ARGE-SING HIGH-DRIVING O-POER CASS-AB BUFFER AMPIFIER 1737 [8] K.E. Brehmer and J.B. ieser, arge swing CMOS power amplifier IEEE J. Solid-State Circuits, vol.sc-18, no.6, pp , Dec [9] J.A. Fisher, A high-performance CMOS power amplifier, IEEE J. Solid-State Circuits, vol.sc-20, no.6, pp.00 05, Dec [10] J. Kih, B. Chang, D.-K. Jeong, and. Kim, Class-AB large-swing CMOS buffer amplifier with controlled bias current, IEEE J. Solid- State Circuits, vol.28, no., pp , Dec [11] G. Palumbo and S. Pennisi, High-frequency harmonic distortion in feedback amplifiers: Analysis and applications, IEEE Trans. Circuits Syst. I, Fundam. Theory Appl., vol.50, no.3, pp , March [] P. Gray and R. Meyer, Analysis and Design of Analog Integrated Circuits, 3rd ed., iley, New York, [13] F.N.. Op t Eynde, P.F.M. Ampe,. Verdeyen, and.m.c. Sansen, A CMOS large-swing low-distortion three-stage class AB power amplifier, IEEE J. Solid-State Circuits, vol.25, no.1, pp , Feb Chih-en u was born in Tainan, Taiwan, R.O.C., on October 11, He received the B.S. degree in Electronic Engineering from National Twiwan Institute of Technology, Taipei, in 1991, the M.S. degree in Electro-optics from National Chiao Tung University, Hsinchu, Taiwan, in 1994, and the Ph.D. degree in Electronic Engineering from National Chiao Tung University. During , he was an Assistant Professor of the Department of Electrical Engineering, Da-yeh University. He joined the National Chi Nan University, Puli, Nan-Tou, Taiwan, in 2001 and is currently an Assistant Professor in the Department of Electrical Engineering. His research interests include low-power analog design, CD driver design, and analog/mixed-mode IC design.
A High-Driving Class-AB Buffer Amplifier with a New Pseudo Source Follower
A High-Driving Class-AB Buffer Amplifier with a New Pseudo Source Follower Chih-Wen Lu, Yen-Chih Shen and Meng-Lieh Sheu Abstract A high-driving class-ab buffer amplifier, which consists of a high-gain
More informationAtypical op amp consists of a differential input stage,
IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 33, NO. 6, JUNE 1998 915 Low-Voltage Class Buffers with Quiescent Current Control Fan You, S. H. K. Embabi, and Edgar Sánchez-Sinencio Abstract This paper presents
More informationDYNAMIC FLOATING OUTPUT STAGE FOR LOW POWER BUFFER AMPLIFIER FOR LCD APPLICATION
DYNAMIC FLOATING OUTPUT STAGE FOR LOW POWER BUFFER AMPLIFIER FOR LCD APPLICATION ABSTRACT Hari shanker srivastava and Dr.R.K Baghel Department of Electronics and Communication MANIT Bhopal This topic proposes
More informationClass-AB Low-Voltage CMOS Unity-Gain Buffers
Class-AB Low-Voltage CMOS Unity-Gain Buffers Mariano Jimenez, Antonio Torralba, Ramón G. Carvajal and J. Ramírez-Angulo Abstract Class-AB circuits, which are able to deal with currents several orders of
More informationWITH the rapid evolution of liquid crystal display (LCD)
IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 43, NO. 2, FEBRUARY 2008 371 A 10-Bit LCD Column Driver With Piecewise Linear Digital-to-Analog Converters Chih-Wen Lu, Member, IEEE, and Lung-Chien Huang Abstract
More informationA new class AB folded-cascode operational amplifier
A new class AB folded-cascode operational amplifier Mohammad Yavari a) Integrated Circuits Design Laboratory, Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran a) myavari@aut.ac.ir
More informationA 16Ω Audio Amplifier with 93.8 mw Peak loadpower and 1.43 quiscent power consumption
A 16Ω Audio Amplifier with 93.8 mw Peak loadpower and 1.43 quiscent power consumption IEEE Transactions on circuits and systems- Vol 59 No:3 March 2012 Abstract A class AB audio amplifier is used to drive
More informationNOWADAYS, multistage amplifiers are growing in demand
1690 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I: REGULAR PAPERS, VOL. 51, NO. 9, SEPTEMBER 2004 Advances in Active-Feedback Frequency Compensation With Power Optimization and Transient Improvement Hoi
More informationLow Power Op-Amp Based on Weak Inversion with Miller-Cascoded Frequency Compensation
Low Power Op-Amp Based on Weak Inversion with Miller-Cascoded Frequency Compensation Maryam Borhani, Farhad Razaghian Abstract A design for a rail-to-rail input and output operational amplifier is introduced.
More informationLow Voltage CMOS op-amp with Rail-to-Rail Input/Output Swing.
ow oltage CMOS op-amp with Rail-to-Rail Input/Output Swing. S Gopalaiah and A P Shivaprasad Electrical Communication Engineering Department Indian Institute of Science Bangalore-56. svg@ece.iisc.ernet.in
More informationAn 11-bit Two-Stage Hybrid-DAC for TFT LCD Column Drivers
013 4th International Conference on Intelligent Systems, Modelling and Simulation An 11-bit Two-Stage Hybrid-DAC for TFT CD Column Drivers Ping-Yeh Yin Department of Electrical Engineering National Chi
More informationIN RECENT years, low-dropout linear regulators (LDOs) are
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II: EXPRESS BRIEFS, VOL. 52, NO. 9, SEPTEMBER 2005 563 Design of Low-Power Analog Drivers Based on Slew-Rate Enhancement Circuits for CMOS Low-Dropout Regulators
More informationA Compact Folded-cascode Operational Amplifier with Class-AB Output Stage
A Compact Folded-cascode Operational Amplifier with Class-AB Output Stage EEE 523 Advanced Analog Integrated Circuits Project Report Fuding Ge You are an engineer who is assigned the project to design
More informationDesign and Simulation of Low Voltage Operational Amplifier
Design and Simulation of Low Voltage Operational Amplifier Zach Nelson Department of Electrical Engineering, University of Nevada, Las Vegas 4505 S Maryland Pkwy, Las Vegas, NV 89154 United States of America
More informationA Compact 2.4V Power-efficient Rail-to-rail Operational Amplifier. Strong inversion operation stops a proposed compact 3V power-efficient
A Compact 2.4V Power-efficient Rail-to-rail Operational Amplifier Abstract Strong inversion operation stops a proposed compact 3V power-efficient rail-to-rail Op-Amp from a lower total supply voltage.
More informationChapter 5. Operational Amplifiers and Source Followers. 5.1 Operational Amplifier
Chapter 5 Operational Amplifiers and Source Followers 5.1 Operational Amplifier In single ended operation the output is measured with respect to a fixed potential, usually ground, whereas in double-ended
More informationClass AB Output Stages for Low Voltage CMOS Opamps with Accurate Quiescent Current Control by Means of Dynamic Biasing
Analog Integrated Circuits and Signal Processing, 36, 69 77, 2003 c 2003 Kluwer Academic Publishers. Manufactured in The Netherlands. Class AB Output Stages for Low Voltage CMOS Opamps with Accurate Quiescent
More informationMANY PORTABLE devices available in the market, such
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II: EXPRESS BRIEFS, VOL. 59, NO. 3, MARCH 2012 133 A 16-Ω Audio Amplifier With 93.8-mW Peak Load Power and 1.43-mW Quiescent Power Consumption Chaitanya Mohan,
More informationA Low Power High Speed Class-B Buffer Amplifier for Flat Panel Display Application
A ow ower igh Speed Class-B Buffer Amplifier for Flat anel Display Application Chih-Wen u Department of lectrical ngeerg, National Chi Nan University cwlu@ncnu.edu.tw Chung en ee Department of lectronics
More informationAN increasing number of video and communication applications
1470 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 32, NO. 9, SEPTEMBER 1997 A Low-Power, High-Speed, Current-Feedback Op-Amp with a Novel Class AB High Current Output Stage Jim Bales Abstract A complementary
More informationDesign of Low Voltage Low Power CMOS OP-AMPS with Rail-to-Rail Input/Output Swing.
Design of ow oltage ow Power CMOS OP-AMPS with Rail-to-Rail Input/Output Swing. Mr.S..Gopalaiah Bangalore-56. svg@ece.iisc.ernet.in Prof. A. P. Shivaprasad Bangalore-56. aps@ece.iisc.ernet.in Mr. Sukanta
More informationA CMOS Low-Voltage, High-Gain Op-Amp
A CMOS Low-Voltage, High-Gain Op-Amp G N Lu and G Sou LEAM, Université Pierre et Marie Curie Case 203, 4 place Jussieu, 75252 Paris Cedex 05, France Telephone: (33 1) 44 27 75 11 Fax: (33 1) 44 27 48 37
More informationConstant-Gm, Rail-to-Rail Input Stage Operational Amplifier in 0.35μm CMOS
2011 International Conference on Network and Electronics Engineering IPCSIT vol.11 (2011) (2011) IACSIT Press, Singapore Constant-Gm, Rail-to-Rail Input Stage Operational Amplifier in 0.35μm CMOS Ali Hassanzadeh¹,
More informationAdvanced Operational Amplifiers
IsLab Analog Integrated Circuit Design OPA2-47 Advanced Operational Amplifiers כ Kyungpook National University IsLab Analog Integrated Circuit Design OPA2-1 Advanced Current Mirrors and Opamps Two-stage
More informationRail to rail CMOS complementary input stage with only one active differential pair at a time
LETTER IEICE Electronics Express, Vol.11, No.12, 1 5 Rail to rail CMOS complementary input stage with only one active differential pair at a time Maria Rodanas Valero 1a), Alejandro Roman-Loera 2, Jaime
More informationOperational Amplifiers
CHAPTER 9 Operational Amplifiers Analog IC Analysis and Design 9- Chih-Cheng Hsieh Outline. General Consideration. One-Stage Op Amps / Two-Stage Op Amps 3. Gain Boosting 4. Common-Mode Feedback 5. Input
More informationLecture 300 Low Voltage Op Amps (3/28/10) Page 300-1
Lecture 300 Low Voltage Op Amps (3/28/10) Page 300-1 LECTURE 300 LOW VOLTAGE OP AMPS LECTURE ORGANIZATION Outline Introduction Low voltage input stages Low voltage gain stages Low voltage bias circuits
More informationStudy of High Speed Buffer Amplifier using Microwind
Study of High Speed Buffer Amplifier using Microwind Amrita Shukla M Tech Scholar NIIST Bhopal, India Puran Gaur HOD, NIIST Bhopal India Braj Bihari Soni Asst. Prof. NIIST Bhopal India ABSTRACT This paper
More informatione t Rail-To-Rail Low Power Buffer Amplifier LCD International Journal on Emerging Technologies 7(1): 18-24(2016)
e t International Journal on Emerging Technologies 7(1): 18-24(2016) ISSN No. (Print) : 0975-8364 ISSN No. (Online) : 2249-3255 Rail-To-Rail Low Power Buffer Amplifier LCD Depak Mishra * and Dr. Archana
More informationPerformance Analysis of Low Power, High Gain Operational Amplifier Using CMOS VLSI Design
RESEARCH ARTICLE OPEN ACCESS Performance Analysis of Low Power, High Gain Operational Amplifier Using CMOS VLSI Design Ankush S. Patharkar*, Dr. Shirish M. Deshmukh** *(Department of Electronics and Telecommunication,
More informationAn Ultra Low-Voltage and Low-Power OTA Using Bulk-Input Technique and Its Application in Active-RC Filters
Circuits and Systems, 2011, 2, 183-189 doi:10.4236/cs.2011.23026 Published Online July 2011 (http://www.scirp.org/journal/cs) An Ultra Low-Voltage and Low-Power OTA Using Bulk-Input Technique and Its Application
More informationRail-To-Rail Output Op-Amp Design with Negative Miller Capacitance Compensation
Rail-To-Rail Op-Amp Design with Negative Miller Capacitance Compensation Muhaned Zaidi, Ian Grout, Abu Khari bin A ain Abstract In this paper, a two-stage op-amp design is considered using both Miller
More informationUltra Low Static Power OTA with Slew Rate Enhancement
ECE 595B Analog IC Design Design Project Fall 2009 Project Proposal Ultra Low Static Power OTA with Slew Rate Enhancement Patrick Wesskamp PUID: 00230-83995 1) Introduction In this design project I plan
More informationDESIGN OF TWO-STAGE CLASS AB CASCODE OP-AMP WITH IMPROVED GAIN
DESIGN OF TWO-STAGE CLASS AB CASCODE OP-AMP WITH IMPROVED GAIN 1 B.Hinduja, 2 Dr.G.V. Maha Lakshmi 1 PG Scholar, 2 Professor Department of Electronics and Communication Engineering Sreenidhi Institute
More informationHigh Performance Buffer Amplifier for Liquid Crystal Display System
J E E I C E International Journal of Electrical, Electronics and Computer Engineering 3(2): 52-60(2014) ISSN No. (Online): 2277-2626 High Performance Buffer Amplifier for Liquid Crystal Display System
More informationA Novel Design of Low Voltage,Wilson Current Mirror based Wideband Operational Transconductance Amplifier
A Novel Design of Low Voltage,Wilson Current Mirror based Wideband Operational Transconductance Amplifier Kehul A. Shah 1, N.M.Devashrayee 2 1(Associative Prof., Department of Electronics and Communication,
More informationCLASS AB amplifiers have a wide range of applications in
IEEE TRANSATIONS ON IRUITS AND SYSTEMS II: EXPRESS BRIEFS onverting a Three- Pseudo-lass AB Amplifier to a True lass AB Amplifier Punith R. Surkanti, Student Member, IEEE and Paul M. Furth, Senior Member,
More informationA New Design Technique of CMOS Current Feed Back Operational Amplifier (CFOA)
Circuits and Systems, 2013, 4, 11-15 http://dx.doi.org/10.4236/cs.2013.41003 Published Online January 2013 (http://www.scirp.org/journal/cs) A New Design Technique of CMOS Current Feed Back Operational
More informationInternational Journal of Emerging Technologies in Computational and Applied Sciences (IJETCAS)
International Association of Scientific Innovation and Research (IASIR) (An Association Unifying the Sciences, Engineering, and Applied Research) International Journal of Emerging Technologies in Computational
More informationA Low Power Low Voltage High Performance CMOS Current Mirror
RESEARCH ARTICLE OPEN ACCESS A Low Power Low Voltage High Performance CMOS Current Mirror Sirish Rao, Sampath Kumar V Department of Electronics & Communication JSS Academy of Technical Education Noida,
More informationLOW VOLTAGE ANALOG IC DESIGN PROJECT 1. CONSTANT Gm RAIL TO RAIL INPUT STAGE DESIGN. Prof. Dr. Ali ZEKĐ. Umut YILMAZER
LOW VOLTAGE ANALOG IC DESIGN PROJECT 1 CONSTANT Gm RAIL TO RAIL INPUT STAGE DESIGN Prof. Dr. Ali ZEKĐ Umut YILMAZER 1 1. Introduction In this project, two constant Gm input stages are designed. First circuit
More informationDesign of a Capacitor-less Low Dropout Voltage Regulator
Design of a Capacitor-less Low Dropout Voltage Regulator Sheenam Ahmed 1, Isha Baokar 2, R Sakthivel 3 1 Student, M.Tech VLSI, School of Electronics Engineering, VIT University, Vellore, Tamil Nadu, India
More informationALTHOUGH zero-if and low-if architectures have been
IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 40, NO. 6, JUNE 2005 1249 A 110-MHz 84-dB CMOS Programmable Gain Amplifier With Integrated RSSI Function Chun-Pang Wu and Hen-Wai Tsao Abstract This paper describes
More information[Kumar, 2(9): September, 2013] ISSN: Impact Factor: 1.852
IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Design and Performance analysis of Low power CMOS Op-Amp Anand Kumar Singh *1, Anuradha 2, Dr. Vijay Nath 3 *1,2 Department of
More informationUltra-Low-Voltage Floating-Gate Transconductance Amplifiers
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II: ANALOG AND DIGITAL SIGNAL PROCESSING, VOL. 48, NO. 1, JANUARY 2001 37 Ultra-Low-Voltage Floating-Gate Transconductance Amplifiers Yngvar Berg, Tor S. Lande,
More informationDesign and Simulation of Low Dropout Regulator
Design and Simulation of Low Dropout Regulator Chaitra S Kumar 1, K Sujatha 2 1 MTech Student, Department of Electronics, BMSCE, Bangalore, India 2 Assistant Professor, Department of Electronics, BMSCE,
More informationCMOS fast-settling time low pass filter associated with voltage reference and current limiter for low dropout regulator
CMOS fast-settling time low pass filter associated with voltage reference and current limiter for low dropout regulator Wonseok Oh a), Praveen Nadimpalli, and Dharma Kadam RF Micro Devices Inc., 6825 W.
More informationSimran Singh Student, School Of ICT Gautam Buddha University Greater Noida
An Ultra Low-Voltage CMOS Self-Biased OTA Simran Singh Student, School Of ICT Gautam Buddha University Greater Noida simransinghh386@gmail.com Priyanka Goyal Faculty Associate, School Of ICT Gautam Buddha
More informationA Robust Oscillator for Embedded System without External Crystal
Appl. Math. Inf. Sci. 9, No. 1L, 73-80 (2015) 73 Applied Mathematics & Information Sciences An International Journal http://dx.doi.org/10.12785/amis/091l09 A Robust Oscillator for Embedded System without
More informationInput Stage Concerns. APPLICATION NOTE 656 Design Trade-Offs for Single-Supply Op Amps
Maxim/Dallas > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS Keywords: single-supply, op amps, amplifiers, design, trade-offs, operational amplifiers Apr 03, 2000 APPLICATION NOTE 656 Design Trade-Offs
More informationRevision History. Contents
Revision History Ver. # Rev. Date Rev. By Comment 0.0 9/15/2012 Initial draft 1.0 9/16/2012 Remove class A part 2.0 9/17/2012 Comments and problem 2 added 3.0 10/3/2012 cmdmprobe re-simulation, add supplement
More informationDesign of Rail-to-Rail Op-Amp in 90nm Technology
IJSTE - International Journal of Science Technology & Engineering Volume 1 Issue 2 August 2014 ISSN(online) : 2349-784X Design of Rail-to-Rail Op-Amp in 90nm Technology P R Pournima M.Tech Electronics
More informationAn Improved Bandgap Reference (BGR) Circuit with Constant Voltage and Current Outputs
International Journal of Research in Engineering and Innovation Vol-1, Issue-6 (2017), 60-64 International Journal of Research in Engineering and Innovation (IJREI) journal home page: http://www.ijrei.com
More informationDesign of Low Power High Speed Fully Dynamic CMOS Latched Comparator
International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 10, Issue 4 (April 2014), PP.01-06 Design of Low Power High Speed Fully Dynamic
More informationRadivoje Đurić, 2015, Analogna Integrisana Kola 1
OTA-output buffer 1 According to the types of loads, the driving capability of the output stages differs. For switched capacitor circuits which have high impedance capacitive loads, class A output stage
More informationG m /I D based Three stage Operational Amplifier Design
G m /I D based Three stage Operational Amplifier Design Rishabh Shukla SVNIT, Surat shuklarishabh31081988@gmail.com Abstract A nested Gm-C compensated three stage Operational Amplifier is reviewed using
More informationDesign and Analysis of a Continuous-Time Common-Mode Feedback Circuit Based on Differential-Difference Amplifier
Research Journal of Applied Sciences, Engineering and Technology 4(5): 45-457, 01 ISSN: 040-7467 Maxwell Scientific Organization, 01 Submitted: September 9, 011 Accepted: November 04, 011 Published: March
More informationHIGH-BANDWIDTH BUFFER AMPLIFIER FOR LIQUID CRYSTAL DISPLAY APPLICATIONS. Saeed Sadoni, Abdalhossein Rezai
FACTA UNIVERSITATIS Series: Electronics and Energetics Vol. 30, N o 4, December 2017, pp. 549-556 DOI: 10.2298/FUEE1704549S HIGH-BANDIDTH BUFFER AMPIFIER FOR IQUID CRYSTA DISPAY APPICATIONS Saeed Sadoni,
More informationTWO AND ONE STAGES OTA
TWO AND ONE STAGES OTA F. Maloberti Department of Electronics Integrated Microsystem Group University of Pavia, 7100 Pavia, Italy franco@ele.unipv.it tel. +39-38-50505; fax. +39-038-505677 474 EE Department
More informationA PSEUDO-CLASS-AB TELESCOPIC-CASCODE OPERATIONAL AMPLIFIER
A PSEUDO-CLASS-AB TELESCOPIC-CASCODE OPERATIONAL AMPLIFIER M. Taherzadeh-Sani, R. Lotfi, and O. Shoaei ABSTRACT A novel class-ab architecture for single-stage operational amplifiers is presented. The structure
More informationDesign of High-Speed Op-Amps for Signal Processing
Design of High-Speed Op-Amps for Signal Processing R. Jacob (Jake) Baker, PhD, PE Professor and Chair Boise State University 1910 University Dr. Boise, ID 83725-2075 jbaker@ieee.org Abstract - As CMOS
More informationAn Ultralow-Power Low-Voltage Fully Differential Opamp for Long-Life Autonomous Portable Equipment
International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 7, Issue 1 (May 2013), PP. 81-85 An Ultralow-Power Low-Voltage Fully Differential
More informationISSN:
468 Modeling and Design of a CMOS Low Drop-out (LDO) Voltage Regulator PRIYADARSHINI JAINAPUR 1, CHIRAG SHARMA 2 1 Department of E&CE, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore-560064,
More informationOperational Amplifier with Two-Stage Gain-Boost
Proceedings of the 6th WSEAS International Conference on Simulation, Modelling and Optimization, Lisbon, Portugal, September 22-24, 2006 482 Operational Amplifier with Two-Stage Gain-Boost FRANZ SCHLÖGL
More informationDesign Analysis and Performance Comparison of Low Power High Gain 2nd Stage Differential Amplifier Along with 1st Stage
Design Analysis and Performance Comparison of Low Power High Gain 2nd Stage Differential Amplifier Along with 1st Stage Sadeque Reza Khan Department of Electronic and Communication Engineering, National
More informationREFERENCE circuits are the basic building blocks in many
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II: EXPRESS BRIEFS, VOL. 53, NO. 8, AUGUST 2006 667 New Curvature-Compensation Technique for CMOS Bandgap Reference With Sub-1-V Operation Ming-Dou Ker, Senior
More informationA 100MHz CMOS wideband IF amplifier
A 100MHz CMOS wideband IF amplifier Sjöland, Henrik; Mattisson, Sven Published in: IEEE Journal of Solid-State Circuits DOI: 10.1109/4.663569 1998 Link to publication Citation for published version (APA):
More informationALow Voltage Wide-Input-Range Bulk-Input CMOS OTA
Analog Integrated Circuits and Signal Processing, 43, 127 136, 2005 c 2005 Springer Science + Business Media, Inc. Manufactured in The Netherlands. ALow Voltage Wide-Input-Range Bulk-Input CMOS OTA IVAN
More informationAn Analog Phase-Locked Loop
1 An Analog Phase-Locked Loop Greg Flewelling ABSTRACT This report discusses the design, simulation, and layout of an Analog Phase-Locked Loop (APLL). The circuit consists of five major parts: A differential
More informationLM321 Low Power Single Op Amp
Low Power Single Op Amp General Description The LM321 brings performance and economy to low power systems. With a high unity gain frequency and a guaranteed 0.4V/µs slew rate, the quiescent current is
More informationISSCC 2004 / SESSION 26 / OPTICAL AND FAST I/O / 26.8
ISSCC 2004 / SESSION 26 / OPTICAL AND FAST I/O / 26.8 26.8 A 2GHz CMOS Variable-Gain Amplifier with 50dB Linear-in-Magnitude Controlled Gain Range for 10GBase-LX4 Ethernet Chia-Hsin Wu, Chang-Shun Liu,
More informationA 24 V Chopper Offset-Stabilized Operational Amplifier with Symmetrical RC Notch Filters having sub-10 µv offset and over-120db CMRR
ROMANIAN JOURNAL OF INFORMATION SCIENCE AND TECHNOLOGY Volume 20, Number 4, 2017, 301 312 A 24 V Chopper Offset-Stabilized Operational Amplifier with Symmetrical RC Notch Filters having sub-10 µv offset
More informationCMOS Instrumentation Amplifier with Offset Cancellation Circuitry for Biomedical Application
CMOS Instrumentation Amplifier with Offset Cancellation Circuitry for Biomedical Application Author Mohd-Yasin, Faisal, Yap, M., I Reaz, M. Published 2006 Conference Title 5th WSEAS Int. Conference on
More informationAnalog CMOS Interface Circuits for UMSI Chip of Environmental Monitoring Microsystem
Analog CMOS Interface Circuits for UMSI Chip of Environmental Monitoring Microsystem A report Submitted to Canopus Systems Inc. Zuhail Sainudeen and Navid Yazdi Arizona State University July 2001 1. Overview
More informationA PROCESS AND TEMPERATURE COMPENSATED RING OSCILLATOR
A PROCESS AND TEMPERATURE COMPENSATED RING OSCILLATOR Yang-Shyung Shyu * and Jiin-Chuan Wu Dept. of Electronics Engineering, National Chiao-Tung University 1001 Ta-Hsueh Road, Hsin-Chu, 300, Taiwan * E-mail:
More informationDesign of High Gain Low Voltage CMOS Comparator
Design of High Gain Low Voltage CMOS Comparator Shahid Khan 1 1 Rustomjee Academy for Global Careers Abstract: Comparators used in most of the analog circuits like analog to digital converters, switching
More informationA 2-V 10.7-MHz CMOS Limiting Amplifier/RSSI
1474 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 35, NO. 10, OCTOBER 2000 A 2-V 10.7-MHz CMOS Limiting Amplifier/RSSI Po-Chiun Huang, Yi-Huei Chen, and Chorng-Kuang Wang, Member, IEEE Abstract This paper
More informationDesign of Miller Compensated Two-Stage Operational Amplifier for Data Converter Applications
Design of Miller Compensated Two-Stage Operational Amplifier for Data Converter Applications Prema Kumar. G Shravan Kudikala Casest, School Of Physics Casest, School Of Physics University Of Hyderabad
More informationINTEGRATED CIRCUITS. AN109 Microprocessor-compatible DACs Dec
INTEGRATED CIRCUITS 1988 Dec DAC products are designed to convert a digital code to an analog signal. Since a common source of digital signals is the data bus of a microprocessor, DAC circuits that are
More informationCommon mode rejection ratio
Common mode rejection ratio Definition: Common mode rejection ratio represents the ratio of the differential voltage gaina d tothecommonmodevoltagegain,a cm : Common mode rejection ratio Definition: Common
More informationINTEGRATED CIRCUITS. SA571 Compandor. Product specification 1997 Aug 14 IC17 Data Handbook
INTEGRATED CIRCUITS 1997 Aug 14 IC17 Data Handbook DESCRIPTION The is a versatile low cost dual gain control circuit in which either channel may be used as a dynamic range compressor or expandor. Each
More informationWhat is the typical voltage gain of the basic two stage CMOS opamp we studied? (i) 20dB (ii) 40dB (iii) 80dB (iv) 100dB
Department of Electronic ELEC 5808 (ELG 6388) Signal Processing Electronics Final Examination Dec 14th, 2010 5:30PM - 7:30PM R. Mason answer all questions one 8.5 x 11 crib sheets allowed 1. (5 points)
More informationFOR applications such as implantable cardiac pacemakers,
1576 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 32, NO. 10, OCTOBER 1997 Low-Power MOS Integrated Filter with Transconductors with Spoilt Current Sources M. van de Gevel, J. C. Kuenen, J. Davidse, and
More informationDesign of a low voltage,low drop-out (LDO) voltage cmos regulator
Design of a low,low drop-out (LDO) cmos regulator Chaithra T S Ashwini Abstract- In this paper a low, low drop-out (LDO) regulator design procedure is proposed and implemented using 0.25 micron CMOS process.
More informationDesign and Analysis of Low Power Two Stage CMOS Op- Amp with 50nm Technology
Design and Analysis of Low Power Two Stage CMOS Op- Amp with 50nm Technology Swetha Velicheti, Y. Sandhyarani, P.Praveen kumar, B.Umamaheshrao Assistant Professor, Dept. of ECE, SSCE, Srikakulam, A.P.,
More informationBasic distortion definitions
Conclusions The push-pull second-generation current-conveyor realised with a complementary bipolar integration technology is probably the most appropriate choice as a building block for low-distortion
More informationLow-Voltage Wide Linear Range Tunable Operational Transconductance Amplifier
Low-Voltage Wide Linear Range Tunable Operational Transconductance Amplifier A dissertation submitted in partial fulfillment of the requirement for the award of degree of Master of Technology in VLSI Design
More informationChapter 12 Opertational Amplifier Circuits
1 Chapter 12 Opertational Amplifier Circuits Learning Objectives 1) The design and analysis of the two basic CMOS op-amp architectures: the two-stage circuit and the single-stage, folded cascode circuit.
More information620 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 45, NO. 3, MARCH /$ IEEE
620 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 45, NO. 3, MARCH 2010 A 12 bit 50 MS/s CMOS Nyquist A/D Converter With a Fully Differential Class-AB Switched Op-Amp Young-Ju Kim, Hee-Cheol Choi, Gil-Cho
More informationLow-voltage high dynamic range CMOS exponential function generator
Applied mathematics in Engineering, Management and Technology 3() 015:50-56 Low-voltage high dynamic range CMOS exponential function generator Behzad Ghanavati Department of Electrical Engineering, College
More informationDesign and Analysis of High Gain Differential Amplifier Using Various Topologies
Design and Analysis of High Gain Amplifier Using Various Topologies SAMARLA.SHILPA 1, J SRILATHA 2 1Assistant Professor, Dept of Electronics and Communication Engineering, NNRG, Ghatkesar, Hyderabad, India.
More informationSolid State Devices & Circuits. 18. Advanced Techniques
ECE 442 Solid State Devices & Circuits 18. Advanced Techniques Jose E. Schutt-Aine Electrical l&c Computer Engineering i University of Illinois jschutt@emlab.uiuc.edu 1 Darlington Configuration - Popular
More informationA -100 db THD, 120 db SNR programmable gain amplifier in a 3.3 V, 0.5µm CMOS process
A -100 db THD, 120 db SNR programmable gain amplifier in a 3.3 V, 0.5µm CMOS process Eric COMPAGNE (1), Gilbert MARTEL and Patrice SENN (2) (1) DOLPHIN INTEGRATION BP 65 - ZIRST 38242 MEYLAN Cédex FRANCE
More informationLow Quiescent Power CMOS Op-Amp in 0.5µm Technology
Kevin Fronczak - Low Power CMOS Op-Amp - Rochester Institute of Technology EE610 1 Low Quiescent Power CMOS Op-Amp in 0.5µm Technology Kevin C. Fronczak Abstract This paper analyzes a low quiescent power
More informationSALLEN-KEY FILTERS USING OPERATIONAL TRANSCONDUCTANCE AMPLIFIER
International Journal of Electronics and Communication Engineering and Technology (IJECET) Volume 8, Issue 3, May-June 2017, pp. 52 58, Article ID: IJECET_08_03_006 Available online at http://www.iaeme.com/ijecet/issues.asp?jtypeijecet&vtype8&itype3
More informationChapter 6 Combinational CMOS Circuit and Logic Design. Jin-Fu Li Department of Electrical Engineering National Central University Jungli, Taiwan
Chapter 6 Combinational CMOS Circuit and Logic Design Jin-Fu Li Department of Electrical Engineering National Central University Jungli, Taiwan Outline Advanced Reliable Systems (ARES) Lab. Jin-Fu Li,
More informationA 0.8V, 7A, rail-to-rail input/output, constant Gm operational amplifier in standard digital 0.18m CMOS
Downloaded from orbit.dtu.dk on: Feb 12, 2018 A 0.8V, 7A, rail-to-rail input/output, constant Gm operational amplifier in standard digital 0.18m CMOS Citakovic, J; Nielsen, I. Riis; Nielsen, Jannik Hammel;
More informationLow voltage operational amplifier
DESCRIPTION The NE0 is a very low voltage operational amplifier that can perform with a voltage supply as low as 1.8V or as high as 1V. In addition, split or single supplies can be used, and the output
More informationLOW-VOLTAGE operation and optimized power-to-performance
1068 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 40, NO. 5, MAY 2005 Low-Voltage Super Class AB CMOS OTA Cells With Very High Slew Rate and Power Efficiency Antonio J. López-Martín, Member, IEEE, Sushmita
More informationChapter 1.I.I. Versatile Low Voltaige, Low. Power Op-amp Design. Frode Larsen
Chapter 1.I.I Versatile Low Voltaige, Low Power Op-amp Design Frode Larsen AT&T Microelectronics/Bell Laboratories Abstract In this chapter we will look at low voltage operational amplifier design from
More information