Advanced Operational Amplifiers


 Bethany Scott
 8 months ago
 Views:
Transcription
1 IsLab Analog Integrated Circuit Design OPA247 Advanced Operational Amplifiers כ Kyungpook National University IsLab Analog Integrated Circuit Design OPA21 Advanced Current Mirrors and Opamps Twostage opamps in many commercial ICs Modern opamps gaining in popularity Advanced current mirrors Foldedcascode opamps Currentmirror opamps Fullydifferential opamps: better noise rejection Currentfeedback opamps: large gainbandwidth product
2 IsLab Analog Integrated Circuit Design OPA22 WideSwing Cascode Current Mirrors Outputimpedance degradation by shortchannel effects R o enhancement by cascoding: limits signal swing Q 4 lowers V DS of Q 3 to match to V DS of Q 2 : I o = I i Q 2 and Q 3 biased at the edge of the active region. Effective gatesource voltages for = I i = I o = I D3 2I D3 V eff = V eff2 = V eff3 = µ n C ox (W/L) V eff5 = (n 1)V eff, V eff1 = V eff4 = nv eff V G1 = V G4 = V G5 V eff5 V tn = (n 1)V eff V tn IsLab Analog Integrated Circuit Design OPA23 A wideswing cascode current mirror with twotransistor diodeconnected circuit (whose input resistance 1/g m ) I i I o = I i W (n 1) 2 L Q 4 W n 2 L W L Q 1 V o 0.4 V Q 3 Q 2
3 IsLab Analog Integrated Circuit Design OPA24 Minimum allowable output voltage for n = 1 V DS2 = V DS3 = V G5 V GS1 = V G5 (V eff1 V tn ) = V eff V o V eff1 V DS2 = (n 1)V eff = 2V eff V To ensure that all transistors are in the active region V DS4 = V G3 V DS3 = (V eff V tn ) V eff = V tn > V eff4 = nv eff V tn > nv eff V Take (W/L) 5 smaller to bias Q 2 and Q 3 with slightly larger V DS than the minimum no sharp boundary between linear and active regions, body effect of Q 1 and Q 4 (V SB > 0, V t1, V GS1, V DS2 ) V DS2 V eff ( ) V L 2 = 2.5λ and L 1 = 4λ (twice L min ) to reduce shortchannel effects (V DS2 < V DS1 ) and maximize the pole frequency (ω p2 1/L, 1/L 2 ) IsLab Analog Integrated Circuit Design OPA25 WideSwing Constantg m Bias Circuit Minimizes most of secondorder imperfections caused by the finiteoutput impedance without greatly restricting signal swings. nchannel wideswing cascode current mirror: Q 1 pchannel wideswing cascode current mirror: Q 6 Q 10 Cascode bias circuit: Q 11 Q 14 Startup circuit: Q 15 Q 18 This bias circuit for stabilized g m s allows the performance of realized opamps to be accurately predicted using moderately simple equations. This constantg m bias circuit had been realized and verified for a 0.8µm CMOS technology, and is very important in analog design.
4 IsLab Analog Integrated Circuit Design OPA26 A wideswing constantg m bias circuit: small W/L for Q 18 Q 7 Q 11 Q 8 V bp Q 6 Q 12 Q 10 Q 18 Q 9 V cp Q 16 Q 15 Q 1 Q 4 Q 13 Q 17 V cn Q 2 R B 5 kω Q 3 Q 14 V bn IsLab Analog Integrated Circuit Design OPA27 Enhanced OutputImpedance Mirrors Cascode current mirror with regulated cascode transistor to increase output resistance R o gain boosting Basic idea is to use a negative feedback amplifier to keep V DS of Q 2 as stable as possible I o is less sensitive to the output signal. R o = [g m1 r ds1 (1 A) 1]r ds2 r ds1 g m1 r ds1 r ds2 (1 A) Practical limitation of R o by a parasitic conductance between the drain of Q 1 and its substrate due to shortchannel effects substrate current by impact ionization Reduced enhancement for bipolar transistors due to the base current Need for local compensation capacitors to prevent ringing and substantial increase of settling time for large signal transients
5 IsLab Analog Integrated Circuit Design OPA28 An enhanced outputimpedance current mirror R o I i V B A Q 1 Av ds2 v gs1 g m1 v gs1 r ds1 Q 3 Q 2 r ds2 Circuit equations for regulated cascode current mirror: R o = v t /i t v gs1 = Av ds2 v ds2 = (1 A)v ds2 = (1 A)r ds2 i t i t = g m1 v gs1 (v t r ds2 i t )/r ds1 v t = (r ds1 r ds2 )i t g m1 r ds1 v gs1 = [r ds1 r ds2 (1A)g m1 r ds1 r ds2 ]i t IsLab Analog Integrated Circuit Design OPA29 Säckinger Realization of Enhanced R o Mirrors The feedback amplifier is realized by CS amplifiers: A g m3 r ds3 /2 gm3 r ds3 R o = (g m1 r ds1 )r ds2 = g m1g m3 r ds1 r ds2 r ds3 2 2 The signal swing is significantly reduced due to the feedback amplifier. V DS5 V DS2 = V GS3 = V eff3 V tn V eff2 I i 2 1 I o Q 4 Q 1 Q 6 Q 3 Q 2
6 IsLab Analog Integrated Circuit Design OPA210 WideSwing Current Mirror with Enhanced R o Diodeconnected transistors Q 4 and Q 8 are used as dc level shifters. All transistors are biased with the same current density and the same V eff except for Q 3 and Q 7 : V eff = 2I D /µ n C ox (W/L) I i = 7, V eff3 = V eff7 = 2V eff V DS2 = V G3 V GS4 = (2V eff V tn ) (V eff V tn ) = V eff Power dissipation of this mirror with the shown W/L values would be almost doubled over that of a classical cascode mirror. Power dissipation can be reduced at the expense of speed by biasing the enhancement circuitry (Q 3, Q 4, Q 7, Q 8 ) at lower current density. IsLab Analog Integrated Circuit Design OPA211 A wideswing current mirror with enhanced output impedance I i I o Q 1 70 Q 7 Q 8 Q 4 Q Q 6 Q
7 IsLab Analog Integrated Circuit Design OPA212 A modified version of wideswing enhanced outputimpedance mirror: slightly mismatching, but less area, instability, and power dissipation Bias circuit I i 4 I o = I i V cn Q 1 70 Q 4 Q Q 7 Q 6 Q IsLab Analog Integrated Circuit Design OPA213 FoldedCascode Opamp Modern CMOS opamps are designed to drive only capacitive loads. No voltage buffer higher speed and larger signal swing. Only a single highimpedance node at the output of an opamp. The admittance at all other node is on the order of g m. The speed of the opamp is maximized by having all internal node of low impedance reduced voltage signals and large current signals currentmode opamps (ω H 1/ τ i = 1/ R io C i ). The compensation is usually achieved by the load capacitance: larger, more stable but slower. These opamps = operational transconductance amplifiers (OTAs)
8 IsLab Analog Integrated Circuit Design OPA214 Q 1, Q 2 = differential transistors, Q 6 = cascode transistors dc level shifters A single stage with a high gain of 3000 due to the high output resistance by cascoding Q 7 Q 10 = Wilson, cascode, or wideswing current mirror Q 12, Q 13 = clamp transistors: to increase the slew rate and recover quickly from slewing as clamping the drain voltages of Q 1 and Q 2 Dominant pole compensation by or an additional capacitor Lead compensation by a resistor placed in series with Bias current of cascode transistors is derived by a current subtraction 1, 2 from the same bias circuit using replication principle IsLab Analog Integrated Circuit Design OPA215 A foldedcascode operational amplifier with clamp transistors Q 12 Q 11 Q 3 Q 4 Q 13 1 Q 14 Q 6 V o V i Q 1 Q 2 V i Q 15 2 Q 7 V B Q 8 Q 16 Q 17 Q 9 Q 10
9 IsLab Analog Integrated Circuit Design OPA216 Small Signal Analysis Two signal paths have slightly different transfer functions due to poles and zeros caused by the current mirror. For an nmos mirror, a polezero doublet occurs at frequencies greater than ω ta and can be ignored. Ignoring HF poles and zeros (ω p2 ω ta ) and assuming that g m5 and g m6 are much larger than g ds3 and g ds4, the transfer function is given by A V = V o g m1 Z L (s) = g m1r o R o = g mrd 2 g «mrd 2 V i 1 sr o 3 2 The unitygain frequency of the opamp ω ta g p m1 2ID1 µ n C ox (W/L) 1 = Maximizing g m1 maximizes the unitygain bandwidth ω ta for the given load capacitance (dominant pole). IsLab Analog Integrated Circuit Design OPA217 g m1 is maximized by using wide nmost and larger bias current than that of cascode and mirror MOSTs of the output node maximizes R o and dc gain, better thermal noise performance (v 2 n = 4kT 2 3g m ) A practical upper limit on the ratio of I D1 to I D5 might be around 4 due to biasing by current subtraction. Lead compensation by a resistor R C : chosen to place a zero at 1.2ω ta A V = g m1 1/R o 1/(R C 1/s ) g m1(1 sr C ) s The second poles are primarily due to the time constants introduced by the resistances and parasitic capacitances at the sources of the pchannel cascode transistors: C s6, R s6 = 1 g m6 (1 R L /r ds6 )
10 IsLab Analog Integrated Circuit Design OPA218 Slew Rate A large differential input voltage Q 1 to be turned on hard, Q 2 to be turned off I D4 will be directed through Q 6 into. SR = I D4 Since designing 2 > I D3, both Q 1 and the current source 2 will go into the triode region: I D3 = I D1 = I D17. The source and drain voltage of Q 1 approaches V SS to decrease 2. When coming out of slewing, the source and drain voltage of Q 1 must slew back to a voltage close to V DD. This additional slewing time greatly increases the transient times and the distortion for switchedcapacitor applications. IsLab Analog Integrated Circuit Design OPA219 Clamp transistors Q 12, Q 13 are turned off during normal operation. Their main purpose is to clamp the drain voltages of Q 1 or Q 2 so they don t change as much during slewing. A second effect dynamically increases the bias currents of Q 3 and Q 4 during slewing. Q 12 conducts with the current coming from Q 11. The current increase in Q 11 causes the currents in Q 3 and Q 4 to also increase until the sum of the currents Q 3 and Q 12 is equal to 2. The increase in bias current of Q 4 results in an increase of the maximum current available for charging.
11 IsLab Analog Integrated Circuit Design OPA220 CurrentMirror Opamp Another popular opamp for driving onchip capacitive loads All nodes are low impedance except for the output node. A reasonable overall gain can be achieved by using good current mirrors with high output impedance. Approximate transfer function for current gain K Unitygain frequency A V = V o V i = Kg m1 Z L (s) = Kg m1r o 1 sr o ω ta Kg m1 = K 2ID1 µ n C ox (W/L) 1 IsLab Analog Integrated Circuit Design OPA221 A currentmirror opamp with wideswing cascode current mirrors: I D12 = KI D11 = KI D1 = K /2 Q 6 V B2 Q 7 V B2 Q 8 Q 3 Q 4 Q 9 Q 10 V B1 V o V i Q 1 Q 2 V i Q 11 Q 12 Q 13 Q 14
12 IsLab Analog Integrated Circuit Design OPA222 Total current is known for a given powersupply voltages and P D. I t = (3 K)I D1 = P D /(V DD V SS ) For larger values of K, the opamp transconductance G m Kg m1 is larger, ω ta is also larger if not limited by highfrequency poles, and the dc gain A 0 is larger for fixed I t. ω ta = Kg m1 G m = K 3 K 2It µ n C ox (W/L) 1 R o g m10r 2 ds10 2 = = 2KID1 µ p C ox K(W/L) 1 2 2µp C ox (W/L) 1 2 V 2 A K(I D1 ) 3/2 V 2 A (KI D1 ) 2 A 0 = Kg m1 R o = (3 K) µ n µ p C ox (W/L) 1 V 2 A I t IsLab Analog Integrated Circuit Design OPA223 A practical upper limit on K might be around five. The important nodes to determine the nondominant poles are the drain of Q 1 primarily, and the drains of Q 2 and Q 9 secondly. For given I t, increasing K (I D1, W 8 ) increases the time constant of these nodes. The second pole moves to lower frequencies. For high speed operation, K might be taken as small as one. K = 2 might be a reasonable compromize for general purpose. Slew rate of the currentmirror opamp SR = K For K = 4, 4/5 of the total bias current will be available for charging or discharging during slewing 4 /( ).
13 IsLab Analog Integrated Circuit Design OPA224 This result gives a currentmirror opamp superior slew rates even when compared to a foldedcascode opamp with clamp transistors. No large voltage transients due to low impedance nodes. For the larger bandwidth and slew rate, the currentmirror opamp is usually preferred over a foldedcascode opamp. However, CMO will suffer from larger thermal noise (smaller g m ) because input transistors are biased at a lower proportion of I t. Example 6.3: analysis for transistor sizes given in Table 6.2 (1) K = 2, I D1 = I t /(3 K) = (P D /5)/5 = 80 µa (2) g m1 = 2I D1 µ n C ox (W/L) 1 = 1.7 ma/v (3) f ta = Kg m1 /2π = 54 MHz (4) SR = K / = K2I D1 / = 32 V/µs IsLab Analog Integrated Circuit Design OPA225 Linear Settling Time Time constant for linear settling time: affected by both the feedback factor β and the effective load capacitance, 0.1% t s = 7τ τ = 1 ω 3dB = 1 βω ta, ω ta = g m1 C C, g m1, Kg m1 Feedback factor by return ratio analysis: C C = compensation capacitance, C p = input capacitance of opamp (parasitic switch) β = 1/s(C 1 C p ) 1/s(C 1 C p ) 1/sC 2 = C 2 C 1 C 2 C p Effective load capacitance: C i = input capacitance of the next stage = C i C C C 2(C 1 C p ) C 1 C 2 C p
14 IsLab Analog Integrated Circuit Design OPA226 Fully Differential Opamps Balanced circuits: symmetric and differential inputs and outputs Rejection of commonmode noise from the substrate and switches But can not reject a differential noise by voltagedependent nonlinearities that cause more noise to feed into one signal path than the other. One drawback is that a commonmode feedback circuit must be added. The design of a good CMFB circuit is not trivial: the speed performance comparable to the differential path, the limitation of continuoustime CMFB circuits on maximum allowable signal, the glitch injection and increase of load capacitance for switchedcapacitor CMFB circuits. Slewrate reduction due to fixedbias currents in output current mirror Regardless of limitations, differential designs are becoming more popular. IsLab Analog Integrated Circuit Design OPA227 Fully Differential FoldedCascode Opamp Cascode current sources: Q 7 and Q 8, Q 9 and Q 10 The CMFB circuit will detect the average of two output signals. The negative slew rate is limited by the bias currents of Q 9 or Q 10. Clamp transistors Q 11, Q 12 to minimize transient voltage changes. Drain nodes of the input devices will be responsible for the second pole each signal path consists of only this and output nodes. The complementary topology with nmos as cascode transistor is often a reasonable choice for highspeed designs. But the dc gain would become smaller due to the input transistors of pmos.
15 IsLab Analog Integrated Circuit Design OPA228 A fully differential foldedcascode opamp Q 11 V B1 Q 12 Q 3 Q 4 V B2 Q 6 V i Q 1 Q 2 V i V o Q 7 V B3 Q 8 CMFB circuit V B4 Q 13 Q 9 Q 10 IsLab Analog Integrated Circuit Design OPA229 Fully Differential CurrentMirror Opamp Topology selection: whether the dc gain or bandwidth is more important, whether or second pole is limiting the bandwidth. nmos input transistors: larger dc gain, lower thermal noise. pmos input transistors: larger bandwidth, lower 1/f noise. For a generalpurpose fully differential opamp: large pmos input transistors, a current gain of K = 2, and wideswing enhanced outputimpedance cascode mirrors and current sources. The negative slew rate is limited by the bias currents of Q 13 or Q 14. It is possible to modify the designs to improve slew rate at the expense of smallsignal performances using additional circuitry.
16 IsLab Analog Integrated Circuit Design OPA230 A fully differential currentmirror opamp Q 6 V B2 Q 7 V B2 Q 8 Q 3 Q 4 Q 9 Q 10 V o V i Q 1 Q 2 V i Q 11 V B1 Q 12 CMFB circuit Q 13 Q 14 IsLab Analog Integrated Circuit Design OPA231 Alternative Fully Differential Opamps A fully differential currentmirror opamp with bidirectional output drive: four current mirrors having two outputs for sourcing and sinking. For a large differential input, the current going into V o will be K, and the current being sinked from V o will also be K due to other mirror. A class AB fully differential currentmirror opamp: low power, two differential pairs connected in parallel, a differential pair Q 3, Q 4, a level shifter (Q 1 : source follower, Q 2 : diode), small (class AB). For a large differential input voltage, the pair Q 3, Q 4 turns off, while the current through the pair Q 7, Q 8 increases dynamically due to a lowered gate voltage of Q 7 a very large slewrate performance, but a major problem for low supply voltage due to V CM 2V GS V eff = 2V t 3V eff Level shifters noise increase, lowering second poles by parasitics
17 IsLab Analog Integrated Circuit Design OPA232 A fully differential currentmirror opamp with bidirectional output drive: the CMFB circuit is not shown. K : 1 1 : K 1 : 1 1 : 1 V i Q 1 Q 2 V i V o V o K : 1 1 : K IsLab Analog Integrated Circuit Design OPA233 A class AB fully differential opamp: the CMFB circuit is not shown. K : 1 1 : K Q 1 V i Q 8 Q 4 V i V o Q 2 Q 3 Q 7 Q 6 V o K : 1 1 : K
18 IsLab Analog Integrated Circuit Design OPA234 A fully differential opamp composed of two single ouput opamps v i Av i v o v i Av i v o Single output Differential output v i Av i v o v i v o Balanced differential output Implementation IsLab Analog Integrated Circuit Design OPA235 A fully differential opamp having railtorail ICMR: G m < 15% I 2 M 2 I 3 I 3 V bp Q 6 Q 9 Q 10 V B1 Q 1 Q 2 Q 3 Q 4 V i V o V o V i V B2 Q 7 Q 8 M 1 V bn I 1 I 4 I 4
19 IsLab Analog Integrated Circuit Design OPA236 CommonMode Feedback Circuits The CMFB circuitry is often the most difficult part of the opamp to design two approaches (continuous time, switched capacitor) Continuoustime approach: limitation on signal swing, dependence of CM voltage V CM on signal due to finite CMRR, circuit nonlinearity, and device mismatch unstability of commonmode loop For input differential signal V d, I D1 = I D3 and I D2 = I D4 assuming V CM (V o V o )/2 = 0, CMRR = (I D depends only on V d ) I D5 = I D2 I D3 = ( /2 I) ( /2 I) = Thus I D5 will not change even when large differential signal voltages are present. If V C is used to control the bias voltages of the output stage, the bias currents in the output stage will be independent of whether the input differential signal is present or not. IsLab Analog Integrated Circuit Design OPA237 A continuoustime CMFB circuit: V CM = 0, V C = control voltage V o Q 1 Q 2 Q 3 Q 4 V o V C Q 6
20 IsLab Analog Integrated Circuit Design OPA238 If a positive CM voltage is present, this voltage will cause both I D2 and I D3 to increase, which causes V C to increase. This voltage will increase the current of nmos current sources at the output stage, which will cause the CM voltage to decrease and return to zero. A modified CMFB circuit having twice the commonmode gain and 0.01% linearity. If a positive commonmode voltage is present, the drain current of will be 4 I instead of 2 I. A alternative continuoustime CMFB circuit: less signal swing due to dc level shift, more difficult to compensate owing to additional nodes. The phase margin and step response of the commonmode loop should be verified by simulation for unstability by CM signals. Designing continuoustime CMFB circuits that are both linear and operate with low supply voltage is an area of continuing research. IsLab Analog Integrated Circuit Design OPA239 A modified CMFB circuit having twice the commonmode gain V o Q 1 Q 2 Q 3 Q 4 V o V C Q 7 Q 6
21 IsLab Analog Integrated Circuit Design OPA240 A continuoustime CMFB circuit with accurate output balancing: V CM = V BAL, linear detection of V CM by two identical resistors V GS1 = V GS2 V o Q 1 Q 2 V o 20 kω 20 kω 1.5 pf 1.5 pf V ref Q 3 Q 4 V A V A = V CM V GS1 V C Q 6 V ref = V BAL V GS1 V BAL = 0, V o = V o IsLab Analog Integrated Circuit Design OPA241 A SwitchedCapacitor CMFB Circuit Use for larger output signal swing and linear detection of V CM Capacitors C C generate the average V CM of the output voltages. This circuit acts like a simple RC lowpass filter having a dc input signal V B : in steady state v C = V CM V B, C S = ( )C C V R φ 1 φ 2 v o v o φ 2 φ 1 V R V B v 1 C S v 2 C C v 3 C C v 4 C S M 1 v C
22 IsLab Analog Integrated Circuit Design OPA242 Analysis of SwitchedCapacitor CMFB Circuit Analysis by conservation of charge: q(φ 1 ) = q(φ 2 ) Phase φ 1 : v 1 = v 4 = V B V R, v C = v o v 2 = v o v 3 Phase φ 2 : short (v 1 = v 2, v 3 = v 4 ), steady state (v 2 = v 2, v 3 = v 3) C S v 1 C C v 2 C C v 3 C S v 4 = C S v 1 C C v 2 C C v 3 C S v 4 2C S (V B V R ) C C (v 2 v 3 ) = (C C C S )(v 2 v 3 ) v 2 v 3 = 2(V B V R ), v C = v o v 2, v C = v o v 3 v C = v o v o 2 v C = v o v o 2 V B V R V CM V B V R V B V R V CM V B V R IsLab Analog Integrated Circuit Design OPA243 CurrentFeedback Opamps Popular recently in high gain and high speed applications using complementary bipolar technology CMOS technology Feedback gain can be changed without significantly affecting loop gain a single compensation capacitor can be used irrespective of gain. The input signal v i is applied to a highimpedance input, while a feedback current i f connects to a lowimpedance node v n. The voltage v n is equal to the input signal v i due to the classab unitygain buffer of Q 1, Q 2, and two diodes for biasing. Because R o is very large, a small feedback current i f results in a large output voltage v o i f 0 for a finite output voltage.
23 IsLab Analog Integrated Circuit Design OPA244 A currentfeedback opamp: v i v n, i f 0 I R i f /2 v i I R Q 1 1 : 1 v n i f C C R o 1 v o R 2 i f R 1 I R Q 2 1 : 1 I R i f /2 IsLab Analog Integrated Circuit Design OPA245 Voltage gain: i f 0, v i v n = v o R 1 /(R 1 R 2 ) v o v i = R 1 R 2 R 1 = 1 R 2 R 1 Loop gain: breaking the loop and injecting a test signal v t at the top of R 2 (i f = v t /R 2 for v i = 0) loop gain is independent of R 1 Aβ v o = i f v o = 1 1 = R o/r 2 v t v t i f R 2 sc C 1/R o 1 sr o C C vi =0 Unitygain frequency of the loop gain Aβ: ω t 1/R 2 C C Transfer function: i f = (v o v i )/R 2 v i /R 1, v o = i f (R o C C ) i f = v i (R 1 R 2 ) R 1 R 2 R 1 R o /(1 sr o C C ), v o = i fr o 1 sr o C C A f (s) = v o v i = i f v i v o i f = (R 1 R 2 )R o (R 2 R o )R sc C (R 2 R o )
24 IsLab Analog Integrated Circuit Design OPA246 Bandwidth: R o g m r 2 o/4 R 2 A f (s) R 1 R 2 R sr 2 C C, ω 3dB = 1 R 2 C C = ω t The various closedloop gains can be realized by changing R 1 without affecting the unitygain frequency or the closedloop stability. This independence of gain on stability does not occur for voltagefeedback amplifiers: A f (s) 1/β(1 s/βω ta ), ω t = βg m /C C Limitations: R 1 1/(g m1 g m2 ), use of a purely resistive feedback network, but difficult to compensate if reactive components are used in the feedback network, noiser for Darlingtonpair input stage. Regardless of these limitations, CFOs exhibit excellent highfrequency characteristics and are quite popular in many video and telecommunications applications. IsLab Analog Integrated Circuit Design OPA247 Homework & Project Problems: 6.1, 6.2, 6.7, 6.10, Design a fullydifferential CMOS operational amplifier for the following specifications. Performances Specifications Performances Specifications Power supply ±2.5 V Input CMR ±1 V 0.5 pf Output swing ±1 V DC gain 60 db Settling time 15 ns The design objective is minimizing the power dissipation. Explain why you chose your architecture over alternatives. Draw a circuit schematic with all device sizes. Include the design procedure and the calculation of design parameters. Provide simulation results for verification.
Basic OpAmp Design and Compensation. Chapter 6
Basic OpAmp Design and Compensation Chapter 6 6.1 OpAmp applications Typical applications of OpAmps in analog integrated circuits: (a) Amplification and filtering (b) Biasing and regulation (c) Switchedcapacitor
More informationINF3410 Fall Book Chapter 6: Basic Opamp Design and Compensation
INF3410 Fall 2013 Compensation content Introduction Two Stage Opamps Compensation Slew Rate Systematic Offset Advanced Current Mirrors Operational Transconductance Amplifiers Current Mirror Opamps Folded
More informationChapter 12 Opertational Amplifier Circuits
1 Chapter 12 Opertational Amplifier Circuits Learning Objectives 1) The design and analysis of the two basic CMOS opamp architectures: the twostage circuit and the singlestage, folded cascode circuit.
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 doubleended
More informationLecture 240 Cascode Op Amps (3/28/10) Page 2401
Lecture 240 Cascode Op Amps (3/28/10) Page 2401 LECTURE 240 CASCODE OP AMPS LECTURE ORGANIZATION Outline Lecture Organization Single Stage Cascode Op Amps Two Stage Cascode Op Amps Summary CMOS Analog
More informationAnalysis and Design of Analog Integrated Circuits Lecture 20. Advanced Opamp Topologies (Part II)
Analysis and Design of Analog Integrated Circuits Lecture 20 Advanced Opamp Topologies (Part II) Michael H. Perrott April 15, 2012 Copyright 2012 by Michael H. Perrott All rights reserved. Outline of Lecture
More informationA PSEUDOCLASSAB TELESCOPICCASCODE OPERATIONAL AMPLIFIER
A PSEUDOCLASSAB TELESCOPICCASCODE OPERATIONAL AMPLIFIER M. TaherzadehSani, R. Lotfi, and O. Shoaei ABSTRACT A novel classab architecture for singlestage operational amplifiers is presented. The structure
More informationA Compact Foldedcascode Operational Amplifier with ClassAB Output Stage
A Compact Foldedcascode Operational Amplifier with ClassAB Output Stage EEE 523 Advanced Analog Integrated Circuits Project Report Fuding Ge You are an engineer who is assigned the project to design
More informationVoltage Feedback Op Amp (VFOpAmp)
Data Sheet Voltage Feedback Op Amp (VFOpAmp) Features 55 db dc gain 30 ma current drive Less than 1 V head/floor room 300 V/µs slew rate Capacitive load stable 40 kω input impedance 300 MHz unity gain
More informationLecture 3 SwitchedCapacitor Circuits Trevor Caldwell
Advanced Analog Circuits Lecture 3 SwitchedCapacitor Circuits Trevor Caldwell trevor.caldwell@analog.com Lecture Plan Date Lecture (Wednesday 24pm) Reference Homework 20170111 1 MOD1 & MOD2 ST 2, 3,
More informationDesign of RailtoRail OpAmp in 90nm Technology
IJSTE  International Journal of Science Technology & Engineering Volume 1 Issue 2 August 2014 ISSN(online) : 2349784X Design of RailtoRail OpAmp in 90nm Technology P R Pournima M.Tech Electronics
More informationEECE488: Analog CMOS Integrated Circuit Design Set 7 Opamp Design
EECE488: Analog CMOS Integrated Circuit Design Set 7 Opamp Design References: Analog Integrated Circuit Design by D. Johns and K. Martin and Design of Analog CMOS Integrated Circuits by B. Razavi All figures
More informationA Unity Gain FullyDifferential 10bit and 40MSps SampleAndHold Amplifier in 0.18μm CMOS
A Unity Gain FullyDifferential 0bit and 40MSps SampleAndHold Amplifier in 0.8μm CMOS Sanaz Haddadian, and Rahele Hedayati Abstract A 0bit, 40 MSps, sample and hold, implemented in 0.8μm CMOS technology
More informationBasic OpAmp Design and Compensation. Chapter 6
Basic OpAmp Design and Compensation Chapter 6 6.1 OpAmp applications Typical applications of OpAmps in analog integrated circuits: (a) Amplification and filtering (b) Biasing and regulation (c) Switchedcapacitor
More informationLecture 300 Low Voltage Op Amps (3/28/10) Page 3001
Lecture 300 Low Voltage Op Amps (3/28/10) Page 3001 LECTURE 300 LOW VOLTAGE OP AMPS LECTURE ORGANIZATION Outline Introduction Low voltage input stages Low voltage gain stages Low voltage bias circuits
More informationAnalysis and Design of Analog Integrated Circuits Lecture 18. Key Opamp Specifications
Analysis and Design of Analog Integrated Circuits Lecture 8 Key Opamp Specifications Michael H. Perrott April 8, 0 Copyright 0 by Michael H. Perrott All rights reserved. Recall: Key Specifications of Opamps
More informationDesign of HighSpeed OpAmps for Signal Processing
Design of HighSpeed OpAmps for Signal Processing R. Jacob (Jake) Baker, PhD, PE Professor and Chair Boise State University 1910 University Dr. Boise, ID 837252075 jbaker@ieee.org Abstract  As CMOS
More informationLow Power and Fast Transient High Swing CMOS Telescopic Operational Amplifier
RESEARCH ARTICLE OPEN ACCESS Low Power and Fast Transient High Swing CMOS Telescopic Operational Amplifier Akshay Kumar Kansal 1, Asst Prof. Gayatri Sakya 2 Electronics and Communication Department, 1,2
More informationRailToRail Output OpAmp Design with Negative Miller Capacitance Compensation
RailToRail OpAmp Design with Negative Miller Capacitance Compensation Muhaned Zaidi, Ian Grout, Abu Khari bin A ain Abstract In this paper, a twostage opamp design is considered using both Miller
More informationECEN 5008: Analog IC Design. Final Exam
ECEN 5008 Initials: 1/10 ECEN 5008: Analog IC Design Final Exam Spring 2004 Instructions: 1. Exam Policy: Timelimited, 150minute exam. When the time is called, all work must stop. Put your initials on
More informationLow Power OpAmp Based on Weak Inversion with MillerCascoded Frequency Compensation
Low Power OpAmp Based on Weak Inversion with MillerCascoded Frequency Compensation Maryam Borhani, Farhad Razaghian Abstract A design for a railtorail input and output operational amplifier is introduced.
More informationChapter 15 Goals. accoupled Amplifiers Example of a ThreeStage Amplifier
Chapter 15 Goals accoupled multistage amplifiers including voltage gain, input and output resistances, and smallsignal limitations. dccoupled multistage amplifiers. Darlington configuration and cascode
More informationRadivoje Đurić, 2015, Analogna Integrisana Kola 1
OTAoutput 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 informationECEN 474/704 Lab 5: Frequency Response of Inverting Amplifiers
ECEN 474/704 Lab 5: Frequency Response of Inverting Amplifiers Objective Design, simulate and layout various inverting amplifiers. Introduction Inverting amplifiers are fundamental building blocks of electronic
More informationDesign and Layout of Two Stage High Bandwidth Operational Amplifier
Design and Layout of Two Stage High Bandwidth Operational Amplifier Yasir Mahmood Qureshi Abstract This paper presents the design and layout of a two stage, high speed operational amplifiers using standard
More informationCSE 577 Spring Insoo Kim, Kyusun Choi Mixed Signal CHIP Design Lab. Department of Computer Science & Engineering The Penn State University
CSE 577 Spring 2011 Basic Amplifiers and Differential Amplifier, Kyusun Choi Mixed Signal CHIP Design Lab. Department of Computer Science & Engineering The Penn State University Don t let the computer
More informationTopology Selection: Input
Project #2: Design of an Operational Amplifier By: Adrian Ildefonso Nedeljko Karaulac I have neither given nor received any unauthorized assistance on this project. Process: Baker s 50nm CAD Tool: Cadence
More informationLOW SUPPLY VOLTAGE, LOW NOISE FULLY DIFFERENTIAL PROGRAMMABLE GAIN AMPLIFIERS
LOW SUPPLY VOLTAGE, LOW NOISE FULLY DIFFERENTIAL PROGRAMMABLE GAIN AMPLIFIERS A. Pleteršek, D. Strle, J. Trontelj Microelectronic Laboratory University of Ljubljana, Tržaška 25, 61000 Ljubljana, Slovenia
More informationECEN 474/704 Lab 8: TwoStage Miller Operational Amplifier
ECEN 474/704 Lab 8: TwoStage Miller Operational Amplifier Objective Design, simulate and test a twostage operational amplifier Introduction Operational amplifiers (opamp) are essential components of
More informationDesign of a Sample and Hold Circuit using Rail to Rail Low Voltage Compact Operational Amplifier and bootstrap Switching
RESEARCH ARTICLE OPEN ACCESS Design of a Sample and Hold Circuit using Rail to Rail Low Voltage Compact Operational Amplifier and bootstrap Switching Annu Saini, Prity Yadav (M.Tech. Student, Department
More informationLow Cost, General Purpose High Speed JFET Amplifier AD825
a FEATURES High Speed 41 MHz, 3 db Bandwidth 125 V/ s Slew Rate 8 ns Settling Time Input Bias Current of 2 pa and Noise Current of 1 fa/ Hz Input Voltage Noise of 12 nv/ Hz Fully Specified Power Supplies:
More informationSystem on a Chip. Prof. Dr. Michael Kraft
System on a Chip Prof. Dr. Michael Kraft Lecture 4: Filters Filters General Theory Continuous Time Filters Background Filters are used to separate signals in the frequency domain, e.g. remove noise, tune
More informationA low voltage railtorail operational amplifier with constant operation and improved process robustness
Graduate Theses and Dissertations Graduate College 2009 A low voltage railtorail operational amplifier with constant operation and improved process robustness Rien Lerone Beal Iowa State University Follow
More informationPART. Maxim Integrated Products 1
 + 9; Rev ; / LowCost, HighSlewRate, RailtoRail I/O Op Amps in SC7 General Description The MAX9/MAX9/MAX9 single/dual/quad, lowcost CMOS op amps feature RailtoRail input and output capability
More informationTechnologyIndependent CMOS Op Amp in Minimum Channel Length
TechnologyIndependent CMOS Op Amp in Minimum Channel Length A Thesis Presented to The Academic Faculty by Susanta Sengupta In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy
More informationOperational Amplifier with TwoStage GainBoost
Proceedings of the 6th WSEAS International Conference on Simulation, Modelling and Optimization, Lisbon, Portugal, September 2224, 2006 482 Operational Amplifier with TwoStage GainBoost FRANZ SCHLÖGL
More informationCHAPTER 4 ULTRA WIDE BAND LOW NOISE AMPLIFIER DESIGN
93 CHAPTER 4 ULTRA WIDE BAND LOW NOISE AMPLIFIER DESIGN 4.1 INTRODUCTION Ultra Wide Band (UWB) system is capable of transmitting data over a wide spectrum of frequency bands with low power and high data
More informationCMOS Operational Amplifier
The George Washington University Department of Electrical and Computer Engineering Course: ECE218 Instructor: Mona E. Zaghloul Students: Shunping Wang Yiping (Neil) Tsai Data: 05/14/07 Introduction In
More informationMetalOxideSilicon (MOS) devices PMOS. ntype
MetalOxideSilicon (MOS devices Principle of MOS Field Effect Transistor transistor operation Metal (poly gate on oxide between source and drain Source and drain implants of opposite type to substrate.
More informationChapter 13: Introduction to Switched Capacitor Circuits
Chapter 13: Introduction to Switched Capacitor Circuits 13.1 General Considerations 13.2 Sampling Switches 13.3 SwitchedCapacitor Amplifiers 13.4 SwitchedCapacitor Integrator 13.5 SwitchedCapacitor
More informationAnalog Integrated Circuits Fundamental Building Blocks
Analog Integrated Circuits Fundamental Building Blocks Basic OTA/Opamp architectures Faculty of Electronics Telecommunications and Information Technology Gabor Csipkes Bases of Electronics Department Outline
More informationDESIGN HIGH SPEED, LOW NOISE, LOW POWER TWO STAGE CMOS OPERATIONAL AMPLIFIER. Himanshu Shekhar* 1, Amit Rajput 1
ISSN 22772685 IJESR/June 2014/ Vol4/Issue6/319323 Himanshu Shekhar et al./ International Journal of Engineering & Science Research DESIGN HIGH SPEED, LOW NOISE, LOW POWER TWO STAGE CMOS OPERATIONAL
More informationANALYSIS AND DESIGN OF ANALOG INTEGRATED CIRCUITS
ANALYSIS AND DESIGN OF ANALOG INTEGRATED CIRCUITS Fourth Edition PAUL R. GRAY University of California, Berkeley PAUL J. HURST University of California, Davis STEPHEN H. LEWIS University of California,
More information2. Single Stage OpAmps
/74 2. Single Stage OpAmps Francesc Serra Graells francesc.serra.graells@uab.cat Departament de Microelectrònica i Sistemes Electrònics Universitat Autònoma de Barcelona paco.serra@imbcnm.csic.es Integrated
More informationLecture 030 ECE4430 Review III (1/9/04) Page 0301
Lecture 030 ECE4430 Review III (1/9/04) Page 0301 LECTURE 030 ECE 4430 REVIEW III (READING: GHLM Chaps. 3 and 4) Objective The objective of this presentation is: 1.) Identify the prerequisite material
More informationHigh bandwidth low power operational amplifier design and compensation techniques
Graduate Theses and Dissertations Graduate College 2009 High bandwidth low power operational amplifier design and compensation techniques Vaibhav Kumar Iowa State University Follow this and additional
More information6.976 High Speed Communication Circuits and Systems Lecture 5 High Speed, Broadband Amplifiers
6.976 High Speed Communication Circuits and Systems Lecture 5 High Speed, Broadband Amplifiers Michael Perrott Massachusetts Institute of Technology Copyright 2003 by Michael H. Perrott Broadband Communication
More informationLow Dropout Voltage Regulator Operation and Performance Review
Low Drop Voltage Regulator peration and Performance Review Eric Chen & Alex Leng ntroduction n today s power management systems, high power efficiency becomes necessary to maximize the lifetime of the
More informationMICROELECTRONIC CIRCUIT DESIGN Third Edition
MICROELECTRONIC CIRCUIT DESIGN Third Edition Richard C. Jaeger and Travis N. Blalock Answers to Selected Problems Updated 1/25/08 Chapter 1 1.3 1.52 years, 5.06 years 1.5 1.95 years, 6.46 years 1.8 113
More informationLM6172 Dual High Speed, Low Power, Low Distortion, Voltage Feedback Amplifiers
LM6172 Dual High Speed, Low Power, Low Distortion, Voltage Feedback Amplifiers General Description The LM6172 is a dual high speed voltage feedback amplifier. It is unitygain stable and provides excellent
More informationISSN:
468 Modeling and Design of a CMOS Low Dropout (LDO) Voltage Regulator PRIYADARSHINI JAINAPUR 1, CHIRAG SHARMA 2 1 Department of E&CE, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore560064,
More informationOperational Amplifiers
Monolithic Amplifier Circuits: Operational Amplifiers Chapter Jón Tómas Guðmundsson tumi@hi.is. Week Fall 200 Operational amplifiers (op amps) are an integral part of many analog and mixedsignal systems
More informationChapter 10 Feedback ECE 3120 Microelectronics II Dr. Suketu Naik
1 Chapter 10 Feedback Operational Amplifier Circuit Components 2 1. Ch 7: Current Mirrors and Biasing 2. Ch 9: Frequency Response 3. Ch 8: ActiveLoaded Differential Pair 4. Ch 10: Feedback 5. Ch 11: Output
More informationDual FETInput, Low Distortion OPERATIONAL AMPLIFIER
Dual FETInput, Low Distortion OPERATIONAL AMPLIFIER FEATURES LOW DISTORTION:.3% at khz LOW NOISE: nv/ Hz HIGH SLEW RATE: 2V/µs WIDE GAINBANDWIDTH: 2MHz UNITYGAIN STABLE WIDE SUPPLY RANGE: V S = ±4.
More informationAtypical op amp consists of a differential input stage,
IEEE JOURNAL OF SOLIDSTATE CIRCUITS, VOL. 33, NO. 6, JUNE 1998 915 LowVoltage Class Buffers with Quiescent Current Control Fan You, S. H. K. Embabi, and Edgar SánchezSinencio Abstract This paper presents
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 RomanLoera 2, Jaime
More informationDesign of Low Voltage Low Power CMOS OPAMP
RESEARCH ARTICLE OPEN ACCESS Design of Low Voltage Low Power CMOS OPAMP Shahid Khan, Prof. Sampath kumar V. Electronics & Communication department, JSSATE ABSTRACT Operational amplifiers are an integral
More informationHomework Assignment 07
Homework Assignment 07 Question 1 (Short Takes). 2 points each unless otherwise noted. 1. A singlepole opamp has an openloop lowfrequency gain of A = 10 5 and an open loop, 3dB frequency of 4 Hz.
More informationCommonSource Amplifiers
Lab 2: CommonSource Amplifiers Introduction The commonsource stage is the most basic amplifier stage encountered in CMOS analog circuits. Because of its very high input impedance, moderatetohigh gain,
More informationDESIGN AND VERIFICATION OF ANALOG PHASE LOCKED LOOP CIRCUIT
DESIGN AND VERIFICATION OF ANALOG PHASE LOCKED LOOP CIRCUIT PRADEEP G CHAGASHETTI Mr. H.V. RAVISH ARADHYA Department of E&C Department of E&C R.V.COLLEGE of ENGINEERING R.V.COLLEGE of ENGINEERING Bangalore
More informationMicroelectronic Devices and Circuits Lecture 22  DiffAmp Anal. III: Cascode, µa Outline Announcements DP:
6.012 Microelectronic Devices and Circuits Lecture 22 DiffAmp Anal. III: Cascode, µa741 Outline Announcements DP: Discussion of Q13, Q13' impact. Gain expressions. Review Output Stages DC Offset of an
More informationDual FETInput, Low Distortion OPERATIONAL AMPLIFIER
www.burrbrown.com/databook/.html Dual FETInput, Low Distortion OPERATIONAL AMPLIFIER FEATURES LOW DISTORTION:.3% at khz LOW NOISE: nv/ Hz HIGH SLEW RATE: 25V/µs WIDE GAINBANDWIDTH: MHz UNITYGAIN STABLE
More informationOBSOLETE. SelfContained Audio Preamplifier SSM2017 REV. B
a FEATURES Excellent Noise Performance: 950 pv/ Hz or 1.5 db Noise Figure Ultralow THD: < 0.01% @ G = 100 Over the Full Audio Band Wide Bandwidth: 1 MHz @ G = 100 High Slew Rate: 17 V/ s typ Unity Gain
More informationDESIGN OF A FULLY DIFFERENTIAL HIGHSPEED HIGHPRECISION AMPLIFIER
DESIGN OF A FULLY DIFFERENTIAL HIGHSPEED HIGHPRECISION AMPLIFIER Mayank Gupta mayank@ee.ucla.edu N. V. Girish envy@ee.ucla.edu Design I. Design II. University of California, Los Angeles EE215A Term Project
More informationXR1009, XR mA, 35MHz RailtoRail Amplifiers
0.2mA, 35MHz RailtoRail Amplifiers General Description The XR1009 (single) and XR2009 (dual) are ultralow power, low cost, voltage feedback amplifiers. These amplifiers use only 208μA of supply current
More informationDAT175: Topics in Electronic System Design
DAT175: Topics in Electronic System Design Analog Readout Circuitry for Hearing Aid in STM90nm 21 February 2010 Remzi Yagiz Mungan v1.10 1. Introduction In this project, the aim is to design an adjustable
More informationExperiment #7 MOSFET Dynamic Circuits II
Experiment #7 MOSFET Dynamic Circuits II Jonathan Roderick Introduction The previous experiment introduced the canonic cells for MOSFETs. The small signal model was presented and was used to discuss the
More informationLecture 350 Low Voltage Op Amps (3/26/02) Page 3501
Lecture 350 Low Voltage Op Amps (3/26/02) Page 3501 LECTURE 350 LOW VOLTAGE OP AMPS (READING: AH 415432) Objective The objective of this presentation is: 1.) How to design standard circuit blocks with
More informationDesign of a Folded Cascode Operational Amplifier in a 1.2 Micron SiliconCarbide CMOS Process
University of Arkansas, Fayetteville ScholarWorks@UARK Electrical Engineering Undergraduate Honors Theses Electrical Engineering 52017 Design of a Folded Cascode Operational Amplifier in a 1.2 Micron
More informationEE 501 Lab 4 Design of two stage op amp with miller compensation
EE 501 Lab 4 Design of two stage op amp with miller compensation Objectives: 1. Design a two stage op amp 2. Investigate how to miller compensate a twostage operational amplifier. Tasks: 1. Build a twostage
More informationLowCost, LowPower, UltraSmall, 3V/5V, 500MHz SingleSupply Op Amps with RailtoRail Outputs
983; Rev ; / LowCost, LowPower, UltraSmall, 3V/5V, 5MHz General Description The MAX442 single and MAX443 dual operational amplifiers are unitygainstable devices that combine highspeed performance,
More informationSelfBiased PLL/DLL. ECG minute Final Project Presentation. Wenlan Wu Electrical and Computer Engineering University of Nevada Las Vegas
SelfBiased PLL/DLL ECG721 60minute Final Project Presentation Wenlan Wu Electrical and Computer Engineering University of Nevada Las Vegas Outline Motivation SelfBiasing Technique Differential Buffer
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 informationLecture 200 Cascode Op Amps  II (2/18/02) Page 2001
Lecture 200 Cascode Op Amps II (2/18/02) Page 2001 LECTURE 200 CASCODE OP AMPS II (READING: GHLM 443453, AH 293309) Objective The objective of this presentation is: 1.) Develop cascode op amp architectures
More informationULTRA HIGH SPEED SINGLE OPERATIONAL AMPLIFIER
ULTRA HIGH SPEED SINGLE OPERATIONAL AMPLIFIER GENERAL DESCRIPTION The NJM711 is an ultra high speed single operational amplifier. It can swings 6V/µs high slew rate and 1GHz gain band width product(1mhz
More informationA HighGain, LowPower CMOS Operational Amplifier Using Composite Cascode Stage in the Subthreshold Region
Brigham Young University BYU ScholarsArchive All Theses and Dissertations 20110315 A HighGain, LowPower CMOS Operational Amplifier Using Composite Cascode Stage in the Subthreshold Region Rishi Pratap
More informationPURPOSE: NOTE: Be sure to record ALL results in your laboratory notebook.
EE4902 Lab 9 CMOS OPAMP PURPOSE: The purpose of this lab is to measure the closedloop performance of an opamp designed from individual MOSFETs. This opamp, shown in Fig. 91, combines all of the major
More informationBJT Amplifier. Superposition principle (linear amplifier)
BJT Amplifier Two types analysis DC analysis Applied DC voltage source AC analysis Time varying signal source Superposition principle (linear amplifier) The response of a linear amplifier circuit excited
More informationUNIT I BIASING OF DISCRETE BJT AND MOSFET PART A
UNIT I BIASING OF DISCRETE BJT AND MOSFET PART A 1. Why do we choose Q point at the center of the load line? 2. Name the two techniques used in the stability of the q point.explain. 3. Give the expression
More informationSingle Supply, Rail to Rail Low Power FETInput Op Amp AD820
a FEATURES True Single Supply Operation Output Swings RailtoRail Input Voltage Range Extends Below Ground Single Supply Capability from + V to + V Dual Supply Capability from. V to 8 V Excellent Load
More informationA Compact 2.4V Powerefficient Railtorail Operational Amplifier. Strong inversion operation stops a proposed compact 3V powerefficient
A Compact 2.4V Powerefficient Railtorail Operational Amplifier Abstract Strong inversion operation stops a proposed compact 3V powerefficient railtorail OpAmp from a lower total supply voltage.
More informationDifference between BJTs and FETs. Junction Field Effect Transistors (JFET)
Difference between BJTs and FETs Transistors can be categorized according to their structure, and two of the more commonly known transistor structures, are the BJT and FET. The comparison between BJTs
More informationUniversity of Michigan, EECS413 Final project. A High Speed Operational Amplifier. 1. A High Speed Operational Amplifier
University of Michigan, EECS413 Final project. A High Speed Operational Amplifier. 1 A High Speed Operational Amplifier A. Halim ElSaadi, Mohammed ElTanani, University of Michigan Abstract This paper
More informationImproving Amplifier Voltage Gain
15.1 Multistage accoupled Amplifiers 1077 TABLE 15.3 ThreeStage Amplifier Summary HAND ANALYSIS SPICE RESULTS Voltage gain 998 1010 Input signal range 92.7 V Input resistance 1 M 1M Output resistance
More informationDue to the absence of internal nodes, inverterbased GmC filters [1,2] allow achieving bandwidths beyond what is possible
A ForwardBodyBias Tuned 450MHz GmC 3 rd Order LowPass Filter in 28nm UTBB FDSOI with >1dBVp IIP3 over a 0.7to1V Supply Joeri Lechevallier 1,2, Remko Struiksma 1, Hani Sherry 2, Andreia Cathelin
More informationAn Improved Bandgap Reference (BGR) Circuit with Constant Voltage and Current Outputs
International Journal of Research in Engineering and Innovation Vol1, Issue6 (2017), 6064 International Journal of Research in Engineering and Innovation (IJREI) journal home page: http://www.ijrei.com
More informationChapter 11. Differential Amplifier Circuits
Chapter 11 Differential Amplifier Circuits 11.0 ntroduction Differential amplifier or diffamp is a multitransistor amplifier. t is the fundamental building block of analog circuit. t is virtually formed
More informationLM6164/LM6264/LM6364 High Speed Operational Amplifier
LM6164/LM6264/LM6364 High Speed Operational Amplifier General Description The LM6164 family of highspeed amplifiers exhibits an excellent speedpower product in delivering 300V per µs and 175 MHz GBW
More informationSingle Supply, Rail to Rail Low Power FETInput Op Amp AD820
a FEATURES True Single Supply Operation Output Swings RailtoRail Input Voltage Range Extends Below Ground Single Supply Capability from V to V Dual Supply Capability from. V to 8 V Excellent Load Drive
More informationA LowVoltage, LowPower, TwoStage Amplifier for SwitchedCapacitor Applications in 90 nm CMOS Process
A LowVoltage, LowPower, TwoStage Amplifier for SwitchedCapacitor Applications in 90 nm CMOS Process S. H. Mirhosseini* and A. Ayatollahi* Downloaded from ijeee.iust.ac.ir at 16:45 IRDT on Tuesday April
More information6.776 High Speed Communication Circuits Lecture 6 MOS Transistors, Passive Components, Gain Bandwidth Issue for Broadband Amplifiers
6.776 High Speed Communication Circuits Lecture 6 MOS Transistors, Passive Components, Gain Bandwidth Issue for Broadband Amplifiers Massachusetts Institute of Technology February 17, 2005 Copyright 2005
More information2.996/6.971 Biomedical Devices Design Laboratory Lecture 7: OpAmps
2.996/6.971 Biomedical Devices Design Laboratory Lecture 7: OpAmps Instructor: Dr. Hong Ma Oct. 3, 2007 Fundamental Circuit: Source and Load Sources Power supply Signal Generator Sensor Amplifier output
More informationLM6118/LM6218 Fast Settling Dual Operational Amplifiers
Fast Settling Dual Operational Amplifiers General Description The LM6118/LM6218 are monolithic fastsettling unitygaincompensated dual operational amplifiers with ±20 ma output drive capability. The
More informationDual operational amplifier
DESCRIPTION The 77 is a pair of highperformance monolithic operational amplifiers constructed on a single silicon chip. High commonmode voltage range and absence of latchup make the 77 ideal for use
More informationLM675 Power Operational Amplifier
Power Operational Amplifier General Description The LM675 is a monolithic power operational amplifier featuring wide bandwidth and low input offset voltage, making it equally suitable for AC and DC applications.
More informationBJT Circuits (MCQs of Moderate Complexity)
BJT Circuits (MCQs of Moderate Complexity) 1. The current ib through base of a silicon npn transistor is 1+0.1 cos (1000πt) ma. At 300K, the rπ in the small signal model of the transistor is i b B C r
More informationMultistage Amplifiers
Multistage Amplifiers Singlestage transistor amplifiers are inadequate for meeting most design requirements for any of the four amplifier types (voltage, current, transconductance, and transresistance.)
More information55:041 Electronic Circuits
55:041 Electronic Circuits Mosfet Review Sections of Chapter 3 &4 A. Kruger Mosfet Review, Page1 Basic Structure of MOS Capacitor Sect. 3.1 Width 1 106 m or less Thickness 50 109 m or less ` MOS MetalOxideSemiconductor
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 informationMIC7300 A17. General Description. Features. Applications. Ordering Information. Pin Configurations. Functional Configuration.
MIC7300 HighOutput Drive RailtoRail Op Amp General Description The MIC7300 is a highperformance CMOS operational amplifier featuring railtorail input and output with strong output drive capability.
More information