A Low-Noise AC coupled Instrumentation Amplifier for Recording Bio Signals
|
|
- Nigel Moody
- 5 years ago
- Views:
Transcription
1 Volume 114 No , ISSN: (printed version); ISSN: (on-line version) url: ijpam.eu A Low-Noise AC coupled Instrumentation Amplifier for Recording Bio Signals S.Suhashini 1 and C. Venkata Sudhakar 2 1 Student, M.Tech-VLSI, Department of ECE, SVEC, Tirupati. Mobile No: suhashinishankavaram@gmail.com 2 Assistant Professor, Department of ECE, SVEC,Tirupati. Mobile No: sudhakar.chowdam@gmail.com Abstract The human body is the source of many kinds of signals. These signals are called as bio signals. These signals can be measured by placing an electrode in contact with the human body. These signals will be in the range of few mille volts and also the electrode will induce dc offset to the measured signals. These bio signals should be amplified for further analysis in biomedical applications. The bio signals will amplify by AC coupled instrumentation amplifier. The dc offset also suppressed by the AC coupled instrumentation amplifier. An AC coupled instrumentation amplifier is presented in this paper with low input interfered noise of ~20 and gain of 65 db and CMRR of 142 db with the total power consumption of 104pW. Keywords: AC coupled instrumentation amplifier, CMRR, Bio-signals, Noise, Biomedical applications, DC offset, LTspice software. 1 Introduction The bio signals in human body can be recorded by placing an electrode [2]. Electrode will convert bio signals into electrical signals. The signals amplitude recorded by electrode will be in the range of mv. The bioelectric signals measured from the surface of skin are mostly in the range of 0-2 mv [8]. Bio signals in the human body are electrically weak. This makes the bio signals very susceptible to noise. Noise may come from the devices that are performing the signal acquisition and processing and also from all the other signals that the human body is emitting. The electrode can be a source of distortion that is the electrode introduces offset voltage. Instrumentation amplifier is used to amplify the bio signals recorded by the electrode [1]. Instrumentation amplifier is the first block in analog front end chain that process the bio signals and thus it defines most important specifications like noise level and CMRR of overall systems. Instrumentation amplifier will consume high power in the analog front end and the design should be focused on keeping a good tradeoff between noise and power
2 Instrumentation amplifier is used where high differential gain accuracy, stability must be maintained within a noisy environment and where large common mode signals are present. The applications of instrumentation amplifier are medical instrumentation, data acquisition system, audio application involving low amplitude audio signals in noisy environment to improve signal to noise ratio.in this paper we present an ac-coupled instrumentation amplifier for recording bio signals. The ac-coupled instrumentation amplifier will suppress the dc offset and it will increase the gain and CMRR of the signal. 2 Existing system The output signal of the transducer is given as the input to instrumentation amplifier. The transducer outputs are of very low level signals. So, it is necessary to amplify the level of the signal before the next stage while rejecting noise and the interface. Amplifiers must have high common mode rejection ratio (CMRR) for the rejection of noise. An instrumentation amplifier is usually employed to amplify low level signals, rejecting noise and interference signals. Fig. 1. Instrumentation amplifier The most commonly used instrumentation amplifier consists of three opamps as shown in Fig. 1. The op-amps at input stage are amplifiers are noninverting amplifiers. The output stage op-amp is differential amplifier. By placing the Rgain between the input stage amplifier will eliminate the need of impedance matching. The output stage of the instrumentation amplifier is a differential amplifier, whose output Vout is the amplified difference of the input signals applied to its input terminals. If the outputs of input op-amps are Vo1 and Vo2 then the output of the differential amplifier is given by Eq. 1. The overall voltage gain of the instrumentation amplifier is given by Eq. 2. (1) In standard CMOS technology by using laser trimming method we can achieve perfect impedance matching. But it is very expensive. This topology is easy to implement but not very effective in low noise and low power applications. The 3 stage op-amp also consumes high power. High gain at input stage of (2) 2 330
3 instrumentation amplifier is difficult to achieve due to the electrode offset values. These dc values can suppress the gain of the instrumentation amplifier. Due to this Ac coupled instrumentation amplifier is used to suppress the dc offset and to increase gain and CMRR. 3 Proposed system The processing of low level ac signals in the presence of both common mode noise and differential dc voltage is needed in many applications. In such conditions, AC coupling to instrumentation and differential amplifiers is needed to extract the ac signals by rejecting both common mode noise and dc offset[4]. This situation typically occurs in bioelectric signal acquisition, in which metallic electrode polarization produces a large dc voltage, ranging from 0.15V, which adds to low level bio-logical signals. AC coupling allows only AC signals to pass through a connection. AC coupling removes the DC offset by making use of DC-blocking capacitor in series with the signal. The DC offset introduced by the electrode [7] is suppressed by AC coupled instrumentation amplifier. This can be achieved by placing passive elements like resistors and capacitors. The resistor R1 and capacitor C1 will set the high pass cut-off frequency at the frequency of. All resistors are implemented with diode connected PMOS devices. These resistors are predefined pseudo resistors that are biased in sub threshold region to achieve large resistance values by keeping silicon area small. This design can eliminate the DC offset[5].the AC coupled instrumentation amplifier design is shown in Fig. 2. The Transfer function of the AC coupled instrumentation amplifier is given by Eq. 3. The first stage input amplifiers A1 and A2 are designed by Operational transconductance amplifier. The second stage amplifier A3 is designed by miller compensated amplifier. (3) Fig. 2. AC coupled instrumentation amplifier 3 331
4 A. Input Amplifiers The pre amplifiers A1 and A2 are identically fully balanced operational transconductance amplifiers (OTA) [6]. The function of OTA is to convert an input voltage into an output current. The output current of an OTA is proportional to the difference between the input voltages. OTA provide high input and output impedance. High input impedance allows maximum transfer of the source voltage to the input of the OTA. Maximum transfer of the output current to the load occurs when the output resistance is high.the balanced OTA is designed as shown in Fig.3. In the above OTA design transistors M1=M2, M3=M4, M5=M6, and M7=M8.The ratios of transistors are given below in the tabulated below. MOSFET M1,M2 M3,M4 M5,M6 M7,M8 B. Second stage Amplifier The second stage amplifier is a differential amplifier. The second stage amplifier function is to subtract the output voltages of input amplifiers. This operation increases the CMRR of the instrumentation amplifier. The miller compensated op-amp is selected for second stage amplifier A3. Miller compensated op-amp have high open loop DC gain. Fig. 3.First stage Balanced OTA Fig.4.Second stage Miller compensated amplifier 4 Simulated results The instrumentation amplifier has been simulated using LTspice XVII tool. A. Existing system results a) Common mode input: Instrumentation amplifier both input terminals V1 and V2 are connected to the signal with 100mv amplitude as shown in Fig. 5. The 4 332
5 input signal is 100mv in amplitude and the common mode output signal Vcm amplitude is 42 V shown in Fig. 7. b) Differential mode input: Instrumentation amplifier input V1 is connected to a sinusoidal signal with 100mv amplitude and V2 is connected to the ground as shown in Fig. 6. The output signal Vdf amplitude is 2V shown in Fig. 7.The input signal is amplified to 2V. Fig. 5.Common mode input for the IA Fig.6.Differential mode input for IA The transient analysis output is shown in Fig. 7. The power consumption of instrumentation amplifier is 90 W shown in Fig. 7 c) AC analysis: For AC analysis the V1 and V2 are connected to a sinusoidal signal with 1V amplitude. The AC analysis of IA is shown in Fig. 8. At 1Khz the values of,, CMRR are Common mode gain ( Differential mode gain ( ) = db ) = db CMRR = = db. Fig. 7.Output waves forms of transient analysis Fig. 8. AC analysis of IA 5 333
6 d) Noise analysis: The noise analysis of instrumentation amplifier is shown in Fig. 9.The input referred noise of instrumentation amplifier is B. Proposed system result Fig. 9. Noise analysis of instrumentation amplifier The Operational transconductance amplifier (OTA) is chosen for input stage amplifiers. The OTA design is shown in Fig. 10. The miller compensated amplifier is chosen for second stage amplifiers. The miller compensated amplifier design shown in Fig. 11. AC coupled instrumentation amplifier implementation using LTspice is shown in Fig. 12 and Fig.13. Fig.10. OTA design Fig.11.Miller compensated amplifier design a) AC analysis: For AC analysis the Input amplifiers are connected to Sinusoidal signal with 1V amplitude. AC analysis of AC coupled IA is shown in Fig. 14. At 1Khz the values of,, CMRR are Common mode gain ( Differential mode gain ( ) = db ) =64.97 db CMRR = = dB
7 Fig.12. Common mode input for Ac coupled IA Fig.13.Differential mode input for AC coupled IA b) Noise analysis: The noise analysis of instrumentation amplifier is shown in Fig. 15. Fig.14.AC analysis of AC coupled IA Fig.15. Noise analysis of AC coupled IA The input referred noise of AC coupled instrumentation amplifier is. The power consumption of AC coupled instrumentation amplifier is pw. 5 Conclusion A low noise AC coupled instrumentation amplifier is designed and simulated using LTspice software. The AC coupled instrumentation amplifier consumes less power of 104pW. It has low input interfered noise of ~20 (less than 1 High CMRR of 142 db, and high gain of 65 db. These results are compared with the instrumentation amplifier results are shown in comparison table. The AC coupled instrumentation amplifier has high CMRR, less power consumption, less input interfered noise. Table 1: Comparison of results Existing System Proposed System Gain 54dB 65dB CMRR 81 db 142dB Input interfered noise ~81 ~20 Power consumption pW 7 335
8 References [1] E.Paraskevopoulou and Amir Eftekhar and NishanthKulasekeram.," A lownoise instrumentation amplifier with DC suppression for recording ENG signals, "IEEE Trans. Biomed. Eng., pp , [2] X. Navarro et al., A critical review of interfaces with the peripheral nervous system for the control of neuroprostheses and hybrid bionic systems, J. Peripher. Nerve. Syst., vol. 10, pp , [3] H. Wark et al., A new high-density (25 electrodes/mm2) penetrating microelectrode array for recording and stimulating sub-millimetre neuroanatomical structures, J. Neural Eng., vol. 10, no. 4, p ,2013. [4] L. Andreasen and J. J. Struijk, Signal strength versus cuff length in nerve cuff electrode recordings, IEEE Trans. Biomed. Eng., vol. 49, no. 9, pp , [5] R. Rieger et al., Very low-noise eng amplifier system using cmos technology, IEEE Trans. Neural Sys. andreh. Eng., vol. 14, no. 4, pp , [6] Twinkle Patel, KishanRaikar, SharanHiremath, Prof. SnehaMeti, Design of Balanced Operational Transconductance Amplifier (OTA), International Journal of Emerging Technology in Computer Science & Electronics (IJETCSE) ISSN: Volume 14 Issue 2 APRIL [7] F. Rodrigues et al., Design, fabrication and modeling of a cuff electrode for peripheral nerve stimulation, IEEE ENBENG, pp. 1 4, [8] A. Uranga, X. Navarro, and N. Barniol, Integrated CMOS amplifier for ENG signal recording, IEEE Trans. Biomed. Eng., vol. 51, no. 12, pp , Brief profile about Ms. S. Suhashini S.Suhashini Received B.Tech degree in Electronics and Communication Engineering from APIIIT, Idupulapaya in the year 2015 and M.Tech in VLSI from Sri Vidyanikethan Engineering College, Tirupati in the year Brief Profile about Mr. C. Venkata Sudhakar C Venkata Sudhakar received the B.Tech Degree in Electronic Instrumentation and Control Engineering from S.V.University, Tirupati, Andhra Pradesh, India in 2006, and the M.Tech. Degree in Digital systems and Computer Electronics from J.N.T.U.H. Kukatpally, Hyderabad, Telangana India in Present working as Assistant Professor in the Department of ECE in Sree Vidyanikethan Engineering College and Pursuing the Ph.D. (Part Time) degree in Electronics and Communication Engineering at S.V.University Tirupati
9 337
10 338
ANALYSIS AND DESIGN OF HIGH CMRR INSTRUMENTATION AMPLIFIER FOR ECG SIGNAL ACQUISITION SYSTEM USING 180nm CMOS TECHNOLOGY
International Journal of Electronics and Communication Engineering (IJECE) ISSN 2278-9901 Vol. 2, Issue 4, Sep 2013, 67-74 IASET ANALYSIS AND DESIGN OF HIGH CMRR INSTRUMENTATION AMPLIFIER FOR ECG SIGNAL
More informationCHAPTER 3. Instrumentation Amplifier (IA) Background. 3.1 Introduction. 3.2 Instrumentation Amplifier Architecture and Configurations
CHAPTER 3 Instrumentation Amplifier (IA) Background 3.1 Introduction The IAs are key circuits in many sensor readout systems where, there is a need to amplify small differential signals in the presence
More informationPankaj Naik Electronic and Instrumentation Deptt. SGSITS, Indore, India. Priyanka Sharma Electronic and. SGSITS, Indore, India
Designing Of Current Mode Instrumentation Amplifier For Bio-Signal Using 180nm CMOS Technology Sonu Mourya Electronic and Instrumentation Deptt. SGSITS, Indore, India Pankaj Naik Electronic and Instrumentation
More informationSpecial-Purpose Operational Amplifier Circuits
Special-Purpose Operational Amplifier Circuits Instrumentation Amplifier An instrumentation amplifier (IA) is a differential voltagegain device that amplifies the difference between the voltages existing
More informationDifferential Amplifier : input. resistance. Differential amplifiers are widely used in engineering instrumentation
Differential Amplifier : input resistance Differential amplifiers are widely used in engineering instrumentation Differential Amplifier : input resistance v 2 v 1 ir 1 ir 1 2iR 1 R in v 2 i v 1 2R 1 Differential
More informationDESIGNING OF CURRENT MODE INSTRUMENTATION AMPLIFIER FOR BIO-SIGNAL USING 180NM CMOS TECHNOLOGY
DESIGNING OF CURRENT MODE INSTRUMENTATION AMPLIFIER FOR BIO-SIGNAL USING 180NM CMOS TECHNOLOGY GAYTRI GUPTA AMITY University Email: Gaytri.er@gmail.com Abstract In this paper we have describes the design
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 informationDESIGN OF A NOVEL CURRENT MIRROR BASED DIFFERENTIAL AMPLIFIER DESIGN WITH LATCH NETWORK. Thota Keerthi* 1, Ch. Anil Kumar 2
ISSN 2277-2685 IJESR/October 2014/ Vol-4/Issue-10/682-687 Thota Keerthi et al./ International Journal of Engineering & Science Research DESIGN OF A NOVEL CURRENT MIRROR BASED DIFFERENTIAL AMPLIFIER DESIGN
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 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 informationDesign and Implementation of less quiescent current, less dropout LDO Regulator in 90nm Technology Madhukumar A S #1, M.
Design and Implementation of less quiescent current, less dropout LDO Regulator in 90nm Technology Madhukumar A S #1, M.Nagabhushan #2 #1 M.Tech student, Dept. of ECE. M.S.R.I.T, Bangalore, INDIA #2 Asst.
More informationDesign of Operational Amplifier in 45nm Technology
Design of Operational Amplifier in 45nm Technology Aman Kaushik ME Scholar Dept. of E&CE, NITTTR Chandigarh Abstract-This paper presents the designing and performance analysis of Operational Transconductance
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 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 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 informationNizamuddin M., International Journal of Advance Research, Ideas and Innovations in Technology.
ISSN: 2454-132X Impact factor: 4.295 (Volume3, Issue1) Available online at: www.ijariit.com Design & Performance Analysis of Instrumentation Amplifier at Nanoscale Dr. M. Nizamuddin Assistant professor,
More informationGain Boosted Telescopic OTA with 110db Gain and 1.8GHz. UGF
International Journal of Electronic Engineering Research ISSN 0975-6450 Volume 2 Number 2 (2010) pp. 159 166 Research India Publications http://www.ripublication.com/ijeer.htm Gain Boosted Telescopic OTA
More informationOperational Amplifiers. Boylestad Chapter 10
Operational Amplifiers Boylestad Chapter 10 DC-Offset Parameters Even when the input voltage is zero, an op-amp can have an output offset. The following can cause this offset: Input offset voltage Input
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 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 informationA Design of Sigma-Delta ADC Using OTA
RESEARCH ARTICLE OPEN ACCESS A Design of Sigma-Delta ADC Using OTA Miss. Niveditha Yadav M 1, Mr. Yaseen Basha 2, Dr. Venkatesh kumar H 3 1 Department of ECE, PG Student, NCET/VTU, and Bengaluru, India
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 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 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 informationLow Power Low Noise CMOS Chopper Amplifier
International Journal of Electronics and Computer Science Engineering 734 Available Online at www.ijecse.org ISSN- 2277-1956 Low Power Low Noise CMOS Chopper Amplifier Parneet Kaur 1, Manjit Kaur 2, Gurmohan
More informationAnalysis of Instrumentation Amplifier at 180nm technology
International Journal of Technical Innovation in Modern Engineering & Science (IJTIMES) Impact Factor: 5.22 (SJIF-2017), e-issn: 2455-2585 Volume 4, Issue 7, July-2018 Analysis of Instrumentation Amplifier
More informationA NEW APPROACH TO DESIGN LOW POWER CMOS FLASH A/D CONVERTER
A NEW APPROACH TO DESIGN LOW POWER CMOS FLASH A/D CONVERTER C Mohan¹ and T Ravisekhar 2 ¹M. Tech (VLSI) Student, Sree Vidyanikethan Engineering College (Autonomous), Tirupati, India 2 Assistant Professor,
More informationDesign of Low Voltage Low Power CMOS OP-AMP
RESEARCH ARTICLE OPEN ACCESS Design of Low Voltage Low Power CMOS OP-AMP Shahid Khan, Prof. Sampath kumar V. Electronics & Communication department, JSSATE ABSTRACT Operational amplifiers are an integral
More informationInternational Journal of Science and Research (IJSR) ISSN (Online): Impact Factor (2012): Kumar Rishi 1, Nidhi Goyal 2
ISSN (Online): 9- Impact Factor ():.8 Study and Analysis of Small Signal Parameters, Slew Rate and Power Dissipation of Bipolar Junction Transistor and Complementary MOS Amplifiers With and Without Negative
More informationDimensions in inches (mm) .268 (6.81).255 (6.48) .390 (9.91).379 (9.63) .045 (1.14).030 (.76) 4 Typ. Figure 1. Typical application circuit.
LINEAR OPTOCOUPLER FEATURES Couples AC and DC signals.% Servo Linearity Wide Bandwidth, > KHz High Gain Stability, ±.%/C Low Input-Output Capacitance Low Power Consumption, < mw Isolation Test Voltage,
More informationAdvances In Natural And Applied Sciences Homepage: October; 12(10): pages 1-7 DOI: /anas
Advances In Natural And Applied Sciences Homepage: http://www.aensiweb.com/anas/ 2018 October; 12(10): pages 1-7 DOI: 10.22587/anas.2018.12.10.1 Research Article AENSI Publications Design of CMOS Architecture
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 informationDesign of a MIMO System for Interference Reduction in a Laptop System. EECS 522 Final Project Group 1 Roland Florenz Maksym Kloka Ben Sutton
Design of a MIMO System for Interference Reduction in a Laptop System EECS 522 Final Project Group 1 Roland Florenz Maksym Kloka Ben Sutton Outline Motivation Block Diagram/Concept Introduction Component
More informationUltra Low Power Multistandard G m -C Filter for Biomedical Applications
Volume-7, Issue-5, September-October 2017 International Journal of Engineering and Management Research Page Number: 105-109 Ultra Low Power Multistandard G m -C Filter for Biomedical Applications Rangisetti
More informationDesign of Analog CMOS Integrated Circuits
Design of Analog CMOS Integrated Circuits Behzad Razavi Professor of Electrical Engineering University of California, Los Angeles H Boston Burr Ridge, IL Dubuque, IA Madison, WI New York San Francisco
More informationIFB270 Advanced Electronic Circuits
IFB270 Advanced Electronic Circuits Chapter 14: Special-purpose op-amp circuits Prof. Manar Mohaisen Department of EEC Engineering eview of the Precedent Lecture Introduce the level detection op-amp circuits
More informationDESIGN OF A FULLY DIFFERENTIAL HIGH-SPEED HIGH-PRECISION AMPLIFIER
DESIGN OF A FULLY DIFFERENTIAL HIGH-SPEED HIGH-PRECISION 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 informationDesign and Analysis of Two-Stage Op-Amp in 0.25µm CMOS Technology
Design and Analysis of Two-Stage Op-Amp in 0.25µm CMOS Technology 1 SagarChetani 1, JagveerVerma 2 Department of Electronics and Tele-communication Engineering, Choukasey Engineering College, Bilaspur
More informationLOW POWER FOLDED CASCODE OTA
LOW POWER FOLDED CASCODE OTA Swati Kundra 1, Priyanka Soni 2 and Anshul Kundra 3 1,2 FET, Mody Institute of Technology & Science, Lakshmangarh, Sikar-322331, INDIA swati.kundra87@gmail.com, priyankamec@gmail.com
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 informationDesign of Low-Dropout Regulator
2015; 1(7): 323-330 ISSN Print: 2394-7500 ISSN Online: 2394-5869 Impact Factor: 5.2 IJAR 2015; 1(7): 323-330 www.allresearchjournal.com Received: 20-04-2015 Accepted: 26-05-2015 Nikitha V Student, Dept.
More informationChapter 9: Operational Amplifiers
Chapter 9: Operational Amplifiers The Operational Amplifier (or op-amp) is the ideal, simple amplifier. It is an integrated circuit (IC). An IC contains many discrete components (resistors, capacitors,
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 informationObjectives The purpose of this lab is build and analyze Differential amplifiers based on NMOS transistors (or NPN transistors).
1 Lab 03: Differential Amplifiers (MOSFET) (20 points) NOTE: 1) Please use the basic current mirror from Lab01 for the second part of the lab (Fig. 3). 2) You can use the same chip as the basic current
More informationDesign of High Gain Two stage Op-Amp using 90nm Technology
Design of High Gain Two stage Op-Amp using 90nm Technology Shaik Aqeel 1, P. Krishna Deva 2, C. Mahesh Babu 3 and R.Ganesh 4 1 CVR College of Engineering/UG Student, Hyderabad, India 2 CVR College of Engineering/UG
More informationDesign of High gain and Low Offset CMOS Current Mode Front End Operational Amplifier
Design of High gain and Low Offset CMOS Current Mode Front End Operational Amplifier R.SHANTHA SELVA KUMARI 1, M.VIJAYALAKSHMI 2 1 Professor and Head, 2 Student, Department of Electronics and Communication
More informationApplied Electronics II
Applied Electronics II Chapter 3: Operational Amplifier Part 1- Op Amp Basics School of Electrical and Computer Engineering Addis Ababa Institute of Technology Addis Ababa University Daniel D./Getachew
More informationLinear IC s and applications
Questions and Solutions PART-A Unit-1 INTRODUCTION TO OP-AMPS 1. Explain data acquisition system Jan13 DATA ACQUISITION SYSYTEM BLOCK DIAGRAM: Input stage Intermediate stage Level shifting stage Output
More informationInstrumentation amplifier
Instrumentationamplifieris a closed-loop gainblock that has a differential input and an output that is single-ended with respect to a reference terminal. Application: are intended to be used whenever acquisition
More informationInterface Electronic Circuits
Lecture (5) Interface Electronic Circuits Part: 1 Prof. Kasim M. Al-Aubidy Philadelphia University-Jordan AMSS-MSc Prof. Kasim Al-Aubidy 1 Interface Circuits: An interface circuit is a signal conditioning
More informationCHAPTER 1 INTRODUCTION
CHAPTER 1 INTRODUCTION 1.1 Historical Background Recent advances in Very Large Scale Integration (VLSI) technologies have made possible the realization of complete systems on a single chip. Since complete
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 informationConcepts to be Reviewed
Introductory Medical Device Prototyping Analog Circuits Part 3 Operational Amplifiers, http://saliterman.umn.edu/ Department of Biomedical Engineering, University of Minnesota Concepts to be Reviewed Operational
More informationSensors & Transducers Published by IFSA Publishing, S. L.,
Sensors & Transducers Published by IFSA Publishing, S. L., 208 http://www.sensorsportal.com Fully Differential Operation Amplifier Using Self Cascode MOSFET Structure for High Slew Rate Applications Kalpraj
More informationCascode Bulk Driven Operational Amplifier with Improved Gain
Cascode Bulk Driven Operational Amplifier with Improved Gain A.V.D. Sai Priyanka 1, S. Subba Rao 2 P.G. Student, Department of Electronics and Communication Engineering, VR Siddhartha Engineering College,
More informationAn input resistor suppresses noise and stray pickup developed across the high input impedance of the op amp.
When you have completed this exercise, you will be able to operate a voltage follower using dc voltages. You will verify your results with a multimeter. O I The polarity of V O is identical to the polarity
More informationLecture #2 Operational Amplifiers
Spring 2015 Benha University Faculty of Engineering at Shoubra ECE-322 Electronic Circuits (B) Lecture #2 Operational Amplifiers Instructor: Dr. Ahmad El-Banna Agenda Introduction Op-Amps Input Modes and
More informationVol. 2, Issue 3, May-Jun 2012, pp Design and Performance Analysis of Analog Sub circuits for Multiplying DAC used in Image Compression
Design and Performance Analysis of Analog Sub circuits for Multiplying DAC used in Image Compression K. Satyanarayana Vittal *, Dr. P. Cyril Prasanna Raj **, Pillem Ramesh ***, B.V Aravind *, Dr. Fazal
More informationA FULLY INTEGRATED NEURAL SIGNAL ACQUISITION AMPLIFIER FOR EPILEPTIC SEIZURE PREDICTION
A FULLY INTEGRATED NEURAL SIGNAL ACQUISITION AMPLIFIER FOR EPILEPTIC SEIZURE PREDICTION 1 M. SANTHANALAKSHMI, 2 J. ALEXANDER, 3 P.T.VANATHI & 4 M. RENUGA 1,2,3 Department of ECE, PSG College of Technology,
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 informationOperational Amplifiers
Questions Easy Operational Amplifiers 1. Which of the following statements are true? a. An op-amp has two inputs and three outputs b. An op-amp has one input and two outputs c. An op-amp has two inputs
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 informationIntroduction to Analog Interfacing. ECE/CS 5780/6780: Embedded System Design. Various Op Amps. Ideal Op Amps
Introduction to Analog Interfacing ECE/CS 5780/6780: Embedded System Design Scott R. Little Lecture 19: Operational Amplifiers Most embedded systems include components that measure and/or control real-world
More informationLecture #4 Special-purpose Op-amp Circuits
Spring 2015 Benha University Faculty of Engineering at Shoubra ECE-322 Electronic Circuits (B) Lecture #4 Special-purpose Op-amp Circuits Instructor: Dr. Ahmad El-Banna Agenda Instrumentation Amplifiers
More informationOperational Amplifiers
Fundamentals of op-amp Operation modes Golden rules of op-amp Op-amp circuits Inverting & non-inverting amplifier Unity follower, integrator & differentiator Introduction An operational amplifier, or op-amp,
More informationKINGS COLLEGE OF ENGINEERING* DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK
KINGS COLLEGE OF ENGINEERING* DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK SUB.NAME : LINEAR INTEGRATED CIRCUITS SUB CODE: EC1254 YEAR / SEMESTER : II / IV UNIT- I IC FABRICATION
More informationA NOVEL DESIGN OF CURRENT MODE MULTIPLIER/DIVIDER CIRCUITS FOR ANALOG SIGNAL PROCESSING
Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology IJCSMC, Vol. 3, Issue. 10, October 2014,
More informationKeywords - Analog Multiplier, Four-Quadrant, FVF Differential Structure, Source Follower.
Characterization of CMOS Four Quadrant Analog Multiplier Nipa B. Modi*, Priyesh P. Gandhi ** *(PG Student, Department of Electronics & Communication, L. C. Institute of Technology, Gujarat Technological
More informationLecture Notes Unit-III
Lecture Notes Unit-III FAQs Q1: An operational amplifier has a differential gain of 103 and CMRR of 100, input voltages are 120µV and 80µV, determine output voltage. 2 MARKS
More informationDimensions in inches (mm) .021 (0.527).035 (0.889) .016 (.406).020 (.508 ) .280 (7.112).330 (8.382) Figure 1. Typical application circuit.
IL Linear Optocoupler Dimensions in inches (mm) FEATURES Couples AC and DC signals.% Servo Linearity Wide Bandwidth, > khz High Gain Stability, ±.%/C Low Input-Output Capacitance Low Power Consumption,
More informationDesign and Analysis of Double Gate MOSFET Operational Amplifier in 45nm CMOS Technology
IJSTE - International Journal of Science Technology & Engineering Volume 2 Issue 12 June 2016 ISSN (online): 2349-784X Design and Analysis of Double Gate MOSFET Operational Amplifier in 45nm CMOS Technology
More informationtyuiopasdfghjklzxcvbnmqwertyuiopas dfghjklzxcvbnmqwertyuiopasdfghjklzx cvbnmqwertyuiopasdfghjklzxcvbnmq
qwertyuiopasdfghjklzxcvbnmqwertyui opasdfghjklzxcvbnmqwertyuiopasdfgh jklzxcvbnmqwertyuiopasdfghjklzxcvb nmqwertyuiopasdfghjklzxcvbnmqwer Instrumentation Device Components Semester 2 nd tyuiopasdfghjklzxcvbnmqwertyuiopas
More informationLINEAR IC APPLICATIONS
1 B.Tech III Year I Semester (R09) Regular & Supplementary Examinations December/January 2013/14 1 (a) Why is R e in an emitter-coupled differential amplifier replaced by a constant current source? (b)
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 informationIJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 02, 2016 ISSN (online):
IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 02, 2016 ISSN (online): 2321-0613 Design & Analysis of CMOS Telescopic Operational Transconductance Amplifier (OTA) with
More informationISSN:
1391 DESIGN OF 9 BIT SAR ADC USING HIGH SPEED AND HIGH RESOLUTION OPEN LOOP CMOS COMPARATOR IN 180NM TECHNOLOGY WITH R-2R DAC TOPOLOGY AKHIL A 1, SUNIL JACOB 2 1 M.Tech Student, 2 Associate Professor,
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 informationOperational Amplifiers
Operational Amplifiers Table of contents 1. Design 1.1. The Differential Amplifier 1.2. Level Shifter 1.3. Power Amplifier 2. Characteristics 3. The Opamp without NFB 4. Linear Amplifiers 4.1. The Non-Inverting
More informationA Novel Low Noise High Gain CMOS Instrumentation Amplifier for Biomedical Applications
International Journal of Electrical and Computer Engineering (IJECE) Vol. 3, No. 4, August 2013, pp. 516~523 ISSN: 2088-8708 516 A Novel Low Noise High Gain CMOS Instrumentation Amplifier for Biomedical
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 informationDesign and Analysis of Current-to-Voltage and Voltage - to-current Converters using 0.35µm technology
Design and Analysis of Current-to-Voltage and Voltage - to-current Converters using 0.35µm technology Kopal Gupta 1, Prof. B. P Singh 2, Rockey Choudhary 3 1 M.Tech (VLSI Design ) at Mody Institute of
More informationAdvanced Materials Manufacturing & Characterization. Active Filter Design using Bulk Driven Operational Transconductance Amplifier Topology
Advanced Materials Manufacturing & Characterization Vol 3 Issue 1 (2013) Advanced Materials Manufacturing & Characterization journal home page: www.ijammc-griet.com Active Filter Design using Bulk Driven
More informationEE501 Lab 7 Opamp Measurement
EE501 Lab 7 Opamp Measurement Report due: Nov. 6, 2014 Objective: 1. Understand basic opamp measurement circuits. 2. Build testbench circuits for opamp measurement. Tasks: Op amps are very high gain amplifiers
More informationAnalysis of Two Stage CMOS Opamp using 90nm Technology
Analysis of Two Stage CMOS Opamp using 90nm Technology Neha Shukla #1, Jasbir Kaur *2 # Electronics and Communication, P.E.C University of Technology, Sec-12, Chandigarh, India 1 nehashukla0009@gmail.com
More informationChlorophyll a/b-chlorophyll a sensor for the Biophysical Oceanographic Sensor Array
Intern Project Report Chlorophyll a/b-chlorophyll a sensor for the Biophysical Oceanographic Sensor Array Mary Ma Mentor: Zbigniew Kolber August 21 st, 2003 Introduction Photosynthetic organisms found
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 informationLab 2: Discrete BJT Op-Amps (Part I)
Lab 2: Discrete BJT Op-Amps (Part I) This is a three-week laboratory. You are required to write only one lab report for all parts of this experiment. 1.0. INTRODUCTION In this lab, we will introduce and
More informationChapter 9: Operational Amplifiers
Chapter 9: Operational Amplifiers The Operational Amplifier (or op-amp) is the ideal, simple amplifier. It is an integrated circuit (IC). An IC contains many discrete components (resistors, capacitors,
More informationObjectives The purpose of this lab is build and analyze Differential amplifier based on NPN transistors.
1 Lab 03: Differential Amplifier Total 30 points: 20 points for lab, 5 points for well-organized report, 5 points for immaculate circuit on breadboard NOTES: 1) Please use the basic current mirror from
More informationOp-Amp Design Project EE 5333 Analog Integrated Circuits Prof. Ramesh Harjani Department of ECE University of Minnesota, Twin Cities Report prepared
Op-Amp Design Project EE 5333 Analog Integrated Circuits Prof. Ramesh Harjani Department of ECE University of Minnesota, Twin Cities Report prepared by: Nirav Desai (4280229) 1 Contents: 1. Design Specifications
More informationExperiment 1: Amplifier Characterization Spring 2019
Experiment 1: Amplifier Characterization Spring 2019 Objective: The objective of this experiment is to develop methods for characterizing key properties of operational amplifiers Note: We will be using
More informationAC-Coupled Front-End for Biopotential Measurements
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 50, NO. 3, MARCH 2003 391 AC-Coupled Front-End for Biopotential Measurements Enrique Mario Spinelli 3, Student Member, IEEE, Ramon Pallàs-Areny, Fellow,
More informationDMI COLLEGE OF ENGINEERING
DMI COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING EC8453 - LINEAR INTEGRATED CIRCUITS Question Bank (II-ECE) UNIT I BASICS OF OPERATIONAL AMPLIFIERS PART A 1.Mention the
More informationLecture #4 Basic Op-Amp Circuits
Summer 2015 Ahmad El-Banna Faculty of Engineering Department of Electronics and Communications GEE336 Electronic Circuits II Lecture #4 Basic Op-Amp Circuits Instructor: Dr. Ahmad El-Banna Agenda Some
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 information1. INTRODUCTION TO OPERATIONAL AMPLIFIERS. The standard operational amplifier (op-amp) symbol is shown in Figure (1-a):-
Subject:- Electronic II /1 st Semester Class: 3 rd (Communication & Power Eng.) Lecturer: - Dr. Thamer M. J. Electrical Eng. Dep. Technology Univ. (This subject is deal with analog electronic circuit design
More information55:041 Electronic Circuits The University of Iowa Fall Exam 3. Question 1 Unless stated otherwise, each question below is 1 point.
Exam 3 Name: Score /65 Question 1 Unless stated otherwise, each question below is 1 point. 1. An engineer designs a class-ab amplifier to deliver 2 W (sinusoidal) signal power to an resistive load. Ignoring
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 informationC H A P T E R 02. Operational Amplifiers
C H A P T E R 02 Operational Amplifiers The Op-amp Figure 2.1 Circuit symbol for the op amp. Figure 2.2 The op amp shown connected to dc power supplies. The Ideal Op-amp 1. Infinite input impedance 2.
More informationHOME ASSIGNMENT. Figure.Q3
HOME ASSIGNMENT 1. For the differential amplifier circuit shown below in figure.q1, let I=1 ma, V CC =5V, v CM = -2V, R C =3kΩ and β=100. Assume that the BJTs have v BE =0.7 V at i C =1 ma. Find the voltage
More information