Current Supply Topology. CMOS Cascode Transconductance Amplifier. Basic topology. p-channel cascode current supply is an obvious solution

Size: px
Start display at page:

Download "Current Supply Topology. CMOS Cascode Transconductance Amplifier. Basic topology. p-channel cascode current supply is an obvious solution"

Transcription

1 CMOS Cascode Transconductance Amplifier Basic topology. Current Supply Topology p-channel cascode current supply is an obvious solution Current supply must have a very high source resistance r oc since otherwise it will limit the output resistance of the amplifier need to design a totem pole voltage supply to generate V G2, V G3, and V G4 EE 05 Fall 2000 Page Week 4 EE 05 Fall 2000 Page 2 Week 4

2 Totem Pole Voltage Reference Match device sizes of M 2B, M 3B, and M 4B to M 2, M 3, and M 4 Complete Transconductance Amplifier V BIAS : user must supply a very precise DC voltage V BIAS.2 V so that the CS/CG cascode is biased so that it is in the high gain region CS-CG two-port parameters: G m = g m Output resistance: R out = r o2 ( + g m2 r o ) r o3 ( + g m3 r o4 ) Output swing: V OUT(max) = V D4 - V SD3(sat) = V DD - V SG4B - V SG3B + V SG3 - V SD3(sat) V OUT(max) = 5 V -.5 V -.5 V +.5 V V = 3.0 V V OUT(min) = V D + V DS2(sat) = V G2 - V GS2 + V DS2(sat) = 2 V -.4 V V = V EE 05 Fall 2000 Page 3 Week 4 EE 05 Fall 2000 Page 4 Week 4

3 Multistage Voltage Amplifier Example to understand a complicated circuit Eliminating Current and Voltage Sources Replace current and voltage sources with symbols V DD = 5 V -I D5 -I D6 Q 4 M 3 V B2 Q 2 v OUT + v s _ V + BIAS _ R S M I D0 0 MOSFETs, 3 BJTs, resistor... must identify building blocks Step-by-step approach to identifying the important transistors --. replace all transistor current sources and voltage sources by their symbols -- look for diodes and current mirrors! (M 5, M 6 /M 6B, M 7 /M 7B, and M 0 and Q 2B are part of current sources or a totem pole voltage reference.) 2. for the (few) remaining transistors, identify the type and use two-port smallsignal models to understand the circuit s operation. (For the above amplifier, the remaining transistors are M, Q 2, M 3, and Q 4.) EE 05 Fall 2000 Page 5 Week 4 EE 05 Fall 2000 Page 6 Week 4

4 Identifying Amplifier Stages n-channel MOSFET M has its source grounded --> common source npn BJT Q 2 has its gate tied to a voltage source (from totem pole string of diode-connected transistors) --> common base p-channel MOSFET M 3 has its drain connected to ground --> common drain npn BJT Q 4 has its collector tied to the positive supply --> common collector Voltage amplifier is a cascade of two-port models: Cascode Stage Output Resistance Cascode input stage output resistance determines gain V DD = 5 V -I D6 R out,cb/cs V B2 Q 2 CS CB CD CC R S R S2 M R in R out(cs/cb) R out V + BIAS _. common source/common base with cascoded current-source supply: very high output resistance R out (CS/CB) --> can get extremely high output resistance, with a transconductance equal to that of the CS stage 2. common drain: no loading on previous stage since infinite input resistance 3. common collector: low output resistance Output resistance: note that R S2 = r o >> r π2 R out,cb = ( β o2 r o2 ) r oc6 = ( β o r o2 ) ( r o6 ( + g m6 r o7 )) EE 05 Fall 2000 Page 7 Week 4 EE 05 Fall 2000 Page 8 Week 4

5 CS-CB-CD-CC Two-Port Parameters Since CC and CD stages have unity gain (approximately), we can quickly estimate the voltage gain by finding v in3 /v in where v in3 is the input to the CD stage Voltage gain: DC Bias and Output Swing Assuming all n-channel devices have V GS =.5 V and p-channel devices have V SG =.5 V, we can find all the node voltages... we also assume that V BIAS has been adjusted such that the circuit is in the high-gain region A v ( g m )R out,cb = g m (( β o r o2 ) ( r o6 ( + g m6 r o7 ))) Output resistance: source resistance of CC output stage is relatively small, since it preceded by a CD stage. R R out R out,cc S,CC = = g m4 β o4 g m4 g m3 β o4 Output swing: must consider the limited swing of previous stages (back to cascode) since the the CD/CC output stages are DC level shifters EE 05 Fall 2000 Page 9 Week 4 EE 05 Fall 2000 Page 0 Week 4

6 Multistage Amplifier Frequency Response Summary of frequency response of single-stages: CE/CS: suffers from Miller effect CC/CD: wideband -- see Section 0.5 CB/CG: wideband -- see Section 0.6 (wideband means that the stage operates to near the frequency limit of the device... f T ) Finding the Dominant Pole Multiplying out the denominator: V out A = o V in + b jω + b 2 ( jω) b n ( jω) n The coefficient b originates from the sum of jω/ω i factors -- How to find the Bode plot for a general multistage amplifier? can t handle n poles and m zeroes analytically --> SPICE! develop analytical tool for an important special case: * no zeroes * exactly one dominant pole (ω << ω 2, ω 3,..., ω n ) V out A = o V in ( + j( ω ω )) ( + j( ω ω 2 )) ( ) ( + j( ω ω n )) (the example shows a voltage gain... it could be I out /V in or V out /I in ) b = = ω ω 2 ω n n ω i i ω Therefore, if we can estimate the linear coefficient b in the demoninator polynomial, we can estimate of the dominant pole Procedure: see P. R. Gray and R. G. Meyer, Analysis and Design of Analog Integrated Circuits, 3 rd ed., Wiley, 994, pp Find circuit equations with current sources driving each capacitor 2. Denominator polynomial is determinant of the matrix of coefficients 3. b term comes from a sum of terms, each of which has the form: R Tj C j where C j is the j th capacitor and R Tj is the Thévenin resistance across the j th capacitor terminals (with all capacitors open-circuited) EE 05 Fall 2000 Page Week 4 EE 05 Fall 2000 Page 2 Week 4

7 Open-Circuit Time Constants The dominant pole of the system can be estimated by: Small-signal model: Example: Revisit CE Amplifier ω b n n R Tj C j = = τ j, j where τ j = R Tj C j is the open-circuit time constant for capacitor C j This technique is valuable because it estimates the contribution of each capacitor to the dominant pole frequency separately... which enables the designer to understand what part of a complicated circuit is responsible for limiting the bandwidth of the amplifier. Apply procedure to each capacitor separately. C π s Thévenin resistance is found by inspection as the resistance across its terminals with all capacitors open-circuited: R Tπ = R S r π = R in --> τ Cπ = R o Tπ C π 2. C µ s Thévenin resistance is not obvious --> must use test source and network analysis EE 05 Fall 2000 Page 3 Week 4 EE 05 Fall 2000 Page 4 Week 4

8 Time Constant for C µ Estimate of Dominant Pole for CE Amplifier Circuit for finding R Tµ Estimate dominant pole as inverse of sum of open-circuit time constants ω = ( R Tπ C π + R Tµ C µ ) = R in C π + ( R in + R out + g m R in R out )C µ inspection --> identical to exact analysis (which also assumed ω «ω 2 ) Advantage of open-circuit time constants: general technique Example: include C cs and estimate its effect on ω v π is given by: v o is given by: v π = i t ( R s r π ) = i t R in v o = i o R out = ( i t g m v π )R out = i t ( g m R in + )R out v t is given by: solving for R Tµ = v t / i t v t = v o v π = i t (( + g m R in )R out + R in ) R Tµ = R in + R out + g m R in R out τ Cµ = R o Tµ C µ = ( R in + R out + g m R in R out )C µ EE 05 Fall 2000 Page 5 Week 4 EE 05 Fall 2000 Page 6 Week 4

9 Multistage Amplifier Frequency Response Applying the open-circuit time constant technique to find the dominant pole frequency -- use CS/CB cascode as an example Two-Port Model for Cascode The base-collector capacitor C µ2 is located between the output of the CB stage (the collector of Q 2 ) and small-signal ground (the base of Q 2 ) We have omitted C db, which would be in parallel with C π2 at the output of the CS stage, and C cs2 which would be in parallel with C µ2. In addition, the current supply transistor will contribute additional capacitance to the output node. Time constants τ Cgso = R S C gs τ Cgdo = ( R in + R out + g m R in R out )C gd Systematic approach:. two-port small-signal models for each stage (not the device models!) 2. carefully add capacitances across the appropriate nodes of two-port models, which may not correspond to the familiar device configuation for some models where R in = R S and R out = r o g m2 g m2 Since the output resistance is only /g m2, the Thévenin resistance for C gd is not magnified (i.e., the Miller effect is minimal): τ Cgdo R g S m = RS Cgd R g m2 g S ( + g m g m2 )C gd m2 EE 05 Fall 2000 Page 7 Week 4 EE 05 Fall 2000 Page 8 Week 4

10 Cascode Frequency Response (cont.) The base-emitter capacitor of Q 2 has a time constant of τ Cπ2o = Cπ2 g m2 Gain-Bandwidth Product A useful metric of an amplifier s frequency response is the product of the lowfrequency gain A vo and the 3 db frequency ω 3dB For the cascode, the gain is A vo = -g m R L and the gain-bandwidth product is The base-collector capacitor of Q 2 has a time constant of τ Cµ2o = ( β o2 r o2 r oc R )C L µ2 R L C µ2 Applying the theorem, the dominant pole of the cascode is approximately ω 3db ω 3db τ Cgso + τ Cgdo + τ Cπ + τ 2o Cµ2o R S C gs + R S ( + g m g m2 )C gd g Cπ2 + R L C µ2 m2 g A vo ω m R L 3dB R S C gs + R S ( + g m g m2 )C gd Cπ2 + R g L C µ2 m2 If the voltage source resistance is small, then g A vo ω m R L 3dB ( C π2 g m2 + R L C ) µ2 which has the same form as the common-base gain-bandwidth product (and which is much greater than the Miller-degraded common-source) EE 05 Fall 2000 Page 9 Week 4 EE 05 Fall 2000 Page 20 Week 4

CMOS Cascode Transconductance Amplifier

CMOS Cascode Transconductance Amplifier CMOS Cascode Transconductance Amplifier Basic topology. 5 V I SUP v s V G2 M 2 iout C L v OUT Device Data V Tn = 1 V V Tp = 1 V µ n C ox = 50 µa/v 2 µ p C ox = 25 µa/v 2 λ n = 0.05 V 1 λ p = 0.02 V 1 @

More information

The Miller Approximation. CE Frequency Response. The exact analysis is worked out on pp of H&S.

The Miller Approximation. CE Frequency Response. The exact analysis is worked out on pp of H&S. CE Frequency Response The exact analysis is worked out on pp. 639-64 of H&S. The Miller Approximation Therefore, we consider the effect of C µ on the input node only V ---------- out V s = r g π m ------------------

More information

DC Coupling: General Trends

DC Coupling: General Trends DC Coupling: General Trends * Goal: want both input and output to be centered at halfway between the positive and negative supplies (or ground, for a single supply) -- in order to have maximum possible

More information

Multistage Amplifiers

Multistage Amplifiers Multistage Amplifiers Single-stage transistor amplifiers are inadequate for meeting most design requirements for any of the four amplifier types (voltage, current, transconductance, and transresistance.)

More information

Lecture 34: Designing amplifiers, biasing, frequency response. Context

Lecture 34: Designing amplifiers, biasing, frequency response. Context Lecture 34: Designing amplifiers, biasing, frequency response Prof J. S. Smith Context We will figure out more of the design parameters for the amplifier we looked at in the last lecture, and then we will

More information

Lecture 33: Context. Prof. J. S. Smith

Lecture 33: Context. Prof. J. S. Smith Lecture 33: Prof J. S. Smith Context We are continuing to review some of the building blocks for multi-stage amplifiers, including current sources and cascode connected devices, and we will also look at

More information

Reading. Lecture 33: Context. Lecture Outline. Chapter 9, multi-stage amplifiers. Prof. J. S. Smith

Reading. Lecture 33: Context. Lecture Outline. Chapter 9, multi-stage amplifiers. Prof. J. S. Smith eading Lecture 33: Chapter 9, multi-stage amplifiers Prof J. S. Smith Context Lecture Outline We are continuing to review some of the building blocks for multi-stage amplifiers, including current sources

More information

Lecture 21: Voltage/Current Buffer Freq Response

Lecture 21: Voltage/Current Buffer Freq Response Lecture 21: Voltage/Current Buffer Freq Response Prof. Niknejad Lecture Outline Last Time: Frequency Response of Voltage Buffer Frequency Response of Current Buffer Current Mirrors Biasing Schemes Detailed

More information

ESE319 Introduction to Microelectronics High Frequency BJT Model & Cascode BJT Amplifier

ESE319 Introduction to Microelectronics High Frequency BJT Model & Cascode BJT Amplifier High Frequency BJT Model & Cascode BJT Amplifier 1 Gain of 10 Amplifier Non-ideal Transistor C in R 1 V CC R 2 v s Gain starts dropping at > 1MHz. Why! Because of internal transistor capacitances that

More information

Lecture 21 - Multistage Amplifiers (I) Multistage Amplifiers. November 22, 2005

Lecture 21 - Multistage Amplifiers (I) Multistage Amplifiers. November 22, 2005 6.02 Microelectronic Devices and Circuits Fall 2005 Lecture 2 Lecture 2 Multistage Amplifiers (I) Multistage Amplifiers November 22, 2005 Contents:. Introduction 2. CMOS multistage voltage amplifier 3.

More information

Chapter 15 Goals. ac-coupled Amplifiers Example of a Three-Stage Amplifier

Chapter 15 Goals. ac-coupled Amplifiers Example of a Three-Stage Amplifier Chapter 15 Goals ac-coupled multistage amplifiers including voltage gain, input and output resistances, and small-signal limitations. dc-coupled multistage amplifiers. Darlington configuration and cascode

More information

F7 Transistor Amplifiers

F7 Transistor Amplifiers Lars Ohlsson 2018-09-25 F7 Transistor Amplifiers Outline Transfer characteristics Small signal operation and models Basic configurations Common source (CS) CS/CE w/ source/ emitter degeneration resistance

More information

Unit 3: Integrated-circuit amplifiers (contd.)

Unit 3: Integrated-circuit amplifiers (contd.) Unit 3: Integrated-circuit amplifiers (contd.) COMMON-SOURCE AND COMMON-EMITTER AMPLIFIERS The Common-Source Circuit The most basic IC MOS amplifier is shown in fig.(1). The source of MOS transistor is

More information

EE105 Fall 2015 Microelectronic Devices and Circuits

EE105 Fall 2015 Microelectronic Devices and Circuits EE105 Fall 2015 Microelectronic Devices and Circuits Multi-Stage Amplifiers Prof. Ming C. Wu wu@eecs.berkeley.edu 511 Sutardja Dai Hall (SDH) Terminal Gain and I/O Resistances of MOS Amplifiers Common

More information

ECE 255, MOSFET Basic Configurations

ECE 255, MOSFET Basic Configurations ECE 255, MOSFET Basic Configurations 8 March 2018 In this lecture, we will go back to Section 7.3, and the basic configurations of MOSFET amplifiers will be studied similar to that of BJT. Previously,

More information

Single-Stage Integrated- Circuit Amplifiers

Single-Stage Integrated- Circuit Amplifiers Single-Stage Integrated- Circuit Amplifiers Outline Comparison between the MOS and the BJT From discrete circuit to integrated circuit - Philosophy, Biasing, etc. Frequency response The Common-Source and

More information

Chapter 12 Opertational Amplifier Circuits

Chapter 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 information

Improving Amplifier Voltage Gain

Improving Amplifier Voltage Gain 15.1 Multistage ac-coupled Amplifiers 1077 TABLE 15.3 Three-Stage Amplifier Summary HAND ANALYSIS SPICE RESULTS Voltage gain 998 1010 Input signal range 92.7 V Input resistance 1 M 1M Output resistance

More information

ECE 255, Discrete-Circuit Amplifiers

ECE 255, Discrete-Circuit Amplifiers ECE 255, Discrete-Circuit Amplifiers 20 March 2018 In this lecture, we will continue with the study of transistor amplifiers with the presence of biasing circuits and coupling capacitors in place. We will

More information

Lecture 25 - Frequency Response of Amplifiers (III) Other Amplifier Stages. December 8, 2005

Lecture 25 - Frequency Response of Amplifiers (III) Other Amplifier Stages. December 8, 2005 6.012 Microelectronic Devices and Circuits Fall 2005 Lecture 251 Lecture 25 Frequency Response of Amplifiers (III) Other Amplifier Stages December 8, 2005 Contents: 1. Frequency response of commondrain

More information

ANALOG FUNDAMENTALS C. Topic 4 BASIC FET AMPLIFIER CONFIGURATIONS

ANALOG FUNDAMENTALS C. Topic 4 BASIC FET AMPLIFIER CONFIGURATIONS AV18-AFC ANALOG FUNDAMENTALS C Topic 4 BASIC FET AMPLIFIER CONFIGURATIONS 1 ANALOG FUNDAMENTALS C AV18-AFC Overview This topic identifies the basic FET amplifier configurations and their principles of

More information

ECE 255, MOSFET Amplifiers

ECE 255, MOSFET Amplifiers ECE 255, MOSFET Amplifiers 26 October 2017 In this lecture, the basic configurations of MOSFET amplifiers will be studied similar to that of BJT. Previously, it has been shown that with the transistor

More information

Chapter 7 Building Blocks of Integrated Circuit Amplifiers: Part D: Advanced Current Mirrors

Chapter 7 Building Blocks of Integrated Circuit Amplifiers: Part D: Advanced Current Mirrors 1 Chapter 7 Building Blocks of Integrated Circuit Amplifiers: Part D: Advanced Current Mirrors Current Mirror Example 2 Two Stage Op Amp (MOSFET) Current Mirror Example Three Stage 741 Opamp (BJT) 3 4

More information

Current Mirrors. Basic BJT Current Mirror. Current mirrors are basic building blocks of analog design. Figure shows the basic NPN current mirror.

Current Mirrors. Basic BJT Current Mirror. Current mirrors are basic building blocks of analog design. Figure shows the basic NPN current mirror. Current Mirrors Basic BJT Current Mirror Current mirrors are basic building blocks of analog design. Figure shows the basic NPN current mirror. For its analysis, we assume identical transistors and neglect

More information

Experiment 8 Frequency Response

Experiment 8 Frequency Response Experiment 8 Frequency Response W.T. Yeung, R.A. Cortina, and R.T. Howe UC Berkeley EE 105 Spring 2005 1.0 Objective This lab will introduce the student to frequency response of circuits. The student will

More information

SAMPLE FINAL EXAMINATION FALL TERM

SAMPLE FINAL EXAMINATION FALL TERM ENGINEERING SCIENCES 154 ELECTRONIC DEVICES AND CIRCUITS SAMPLE FINAL EXAMINATION FALL TERM 2001-2002 NAME Some Possible Solutions a. Please answer all of the questions in the spaces provided. If you need

More information

EE105 Fall 2015 Microelectronic Devices and Circuits. Basic Single-Transistor Amplifier Configurations

EE105 Fall 2015 Microelectronic Devices and Circuits. Basic Single-Transistor Amplifier Configurations EE05 Fall 205 Microelectronic Devices and Circuits Prof. Ming C. Wu wu@eecs.berkeley.edu 5 Sutardja Dai Hall (SDH 2- MOSFET Basic Single-Transistor Amplifier Configurations BJT 2-2 Two-Port Model of Amplifiers

More information

Solid State Devices & Circuits. 18. Advanced Techniques

Solid State Devices & Circuits. 18. Advanced Techniques ECE 442 Solid State Devices & Circuits 18. Advanced Techniques Jose E. Schutt-Aine Electrical l&c Computer Engineering i University of Illinois jschutt@emlab.uiuc.edu 1 Darlington Configuration - Popular

More information

Midterm 2 Exam. Max: 90 Points

Midterm 2 Exam. Max: 90 Points Midterm 2 Exam Name: Max: 90 Points Question 1 Consider the circuit below. The duty cycle and frequency of the 555 astable is 55% and 5 khz respectively. (a) Determine a value for so that the average current

More information

Index. Small-Signal Models, 14 saturation current, 3, 5 Transistor Cutoff Frequency, 18 transconductance, 16, 22 transit time, 10

Index. Small-Signal Models, 14 saturation current, 3, 5 Transistor Cutoff Frequency, 18 transconductance, 16, 22 transit time, 10 Index A absolute value, 308 additional pole, 271 analog multiplier, 190 B BiCMOS,107 Bode plot, 266 base-emitter voltage, 16, 50 base-emitter voltages, 296 bias current, 111, 124, 133, 137, 166, 185 bipolar

More information

Experiment #7 MOSFET Dynamic Circuits II

Experiment #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 information

EE301 Electronics I , Fall

EE301 Electronics I , Fall EE301 Electronics I 2018-2019, Fall 1. Introduction to Microelectronics (1 Week/3 Hrs.) Introduction, Historical Background, Basic Consepts 2. Rewiev of Semiconductors (1 Week/3 Hrs.) Semiconductor materials

More information

Gechstudentszone.wordpress.com

Gechstudentszone.wordpress.com UNIT 4: Small Signal Analysis of Amplifiers 4.1 Basic FET Amplifiers In the last chapter, we described the operation of the FET, in particular the MOSFET, and analyzed and designed the dc response of circuits

More information

Mini Project 3 Multi-Transistor Amplifiers. ELEC 301 University of British Columbia

Mini Project 3 Multi-Transistor Amplifiers. ELEC 301 University of British Columbia Mini Project 3 Multi-Transistor Amplifiers ELEC 30 University of British Columbia 4463854 November 0, 207 Contents 0 Introduction Part : Cascode Amplifier. A - DC Operating Point.......................................

More information

Lecture 20 Transistor Amplifiers (II) Other Amplifier Stages

Lecture 20 Transistor Amplifiers (II) Other Amplifier Stages Lecture 20 Transistor Amplifiers (II) Other Amplifier Stages Outline Common drain amplifier Common gate amplifier Reading Assignment: Howe and Sodini; Chapter 8, Sections 8.78.9 6.02 Spring 2009 . Common

More information

Today s topic: frequency response. Chapter 4

Today s topic: frequency response. Chapter 4 Today s topic: frequency response Chapter 4 1 Small-signal analysis applies when transistors can be adequately characterized by their operating points and small linear changes about the points. The use

More information

ECEN 474/704 Lab 5: Frequency Response of Inverting Amplifiers

ECEN 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 information

BJT Circuits (MCQs of Moderate Complexity)

BJT 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 information

II/IV B. TECH. DEGREE EXAMINATIONS, NOVEMBER Second Semester EC/EE ELECTRONIC CIRCUIT ANALYSIS. Time : Three Hours Max.

II/IV B. TECH. DEGREE EXAMINATIONS, NOVEMBER Second Semester EC/EE ELECTRONIC CIRCUIT ANALYSIS. Time : Three Hours Max. Total No. of Questions : 9] [Total No. of Pages : 02 B.Tech. II/ IV YEAR DEGREE EXAMINATION, APRIL/MAY - 2014 (Second Semester) EC/EE/EI Electronic Circuit Analysis Time : 03 Hours Maximum Marks : 70 Q1)

More information

Electronics Prof. D. C. Dube Department of Physics Indian Institute of Technology, Delhi

Electronics Prof. D. C. Dube Department of Physics Indian Institute of Technology, Delhi Electronics Prof. D. C. Dube Department of Physics Indian Institute of Technology, Delhi Module No # 05 FETS and MOSFETS Lecture No # 06 FET/MOSFET Amplifiers and their Analysis In the previous lecture

More information

UNIT I BIASING OF DISCRETE BJT AND MOSFET PART A

UNIT 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 information

Homework Assignment 12

Homework Assignment 12 Homework Assignment 12 Question 1 Shown the is Bode plot of the magnitude of the gain transfer function of a constant GBP amplifier. By how much will the amplifier delay a sine wave with the following

More information

Microelectronics Circuit Analysis and Design

Microelectronics Circuit Analysis and Design Neamen Microelectronics Chapter 6-1 Microelectronics Circuit Analysis and Design Donald A. Neamen Chapter 6 Basic BJT Amplifiers Neamen Microelectronics Chapter 6-2 In this chapter, we will: Understand

More information

Differential Amplifier Design

Differential Amplifier Design Differential Amplifier Design Design with ideal current source bias. Differential and common mode gain results Add finite output resistance to current source. Replace ideal current source with current

More information

Analog Integrated Circuit Design Exercise 1

Analog Integrated Circuit Design Exercise 1 Analog Integrated Circuit Design Exercise 1 Integrated Electronic Systems Lab Prof. Dr.-Ing. Klaus Hofmann M.Sc. Katrin Hirmer, M.Sc. Sreekesh Lakshminarayanan Status: 21.10.2015 Pre-Assignments The lecture

More information

UNIVERSITY OF CALIFORNIA AT BERKELEY College of Engineering Department of Electrical Engineering and Computer Sciences. Discussion Notes #9

UNIVERSITY OF CALIFORNIA AT BERKELEY College of Engineering Department of Electrical Engineering and Computer Sciences. Discussion Notes #9 UNIVERSITY OF CALIFORNIA AT BERKELEY College of Engineering Department of Electrical Engineering and Computer Sciences Discussion Notes #9 EE 05 Spring 2007 Prof. Wu BJT Amplifiers Recall from Chapter

More information

(a) BJT-OPERATING MODES & CONFIGURATIONS

(a) BJT-OPERATING MODES & CONFIGURATIONS (a) BJT-OPERATING MODES & CONFIGURATIONS 1. The leakage current I CBO flows in (a) The emitter, base and collector leads (b) The emitter and base leads. (c) The emitter and collector leads. (d) The base

More information

Microelectronic Circuits II. Ch 10 : Operational-Amplifier Circuits

Microelectronic Circuits II. Ch 10 : Operational-Amplifier Circuits Microelectronic Circuits II Ch 0 : Operational-Amplifier Circuits 0. The Two-stage CMOS Op Amp 0.2 The Folded-Cascode CMOS Op Amp CNU EE 0.- Operational-Amplifier Introduction - Analog ICs : operational

More information

Chapter 11. Differential Amplifier Circuits

Chapter 11. Differential Amplifier Circuits Chapter 11 Differential Amplifier Circuits 11.0 ntroduction Differential amplifier or diff-amp is a multi-transistor amplifier. t is the fundamental building block of analog circuit. t is virtually formed

More information

Lecture 030 ECE4430 Review III (1/9/04) Page 030-1

Lecture 030 ECE4430 Review III (1/9/04) Page 030-1 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 information

Building Blocks of Integrated-Circuit Amplifiers

Building Blocks of Integrated-Circuit Amplifiers Building Blocks of ntegrated-circuit Amplifiers 1 The Basic Gain Cell CS and CE Amplifiers with Current Source Loads Current-source- or active-loaded CS amplifier Rin A o R A o g r r o g r 0 m o m o Current-source-

More information

Microelectronic Devices and Circuits- EECS105 Final Exam

Microelectronic Devices and Circuits- EECS105 Final Exam EECS105 1 of 13 Fall 2000 Microelectronic Devices and Circuits- EECS105 Final Exam Wednesday, December 13, 2000 Costas J. Spanos University of California at Berkeley College of Engineering Department of

More information

6.776 High Speed Communication Circuits Lecture 7 High Freqeuncy, Broadband Amplifiers

6.776 High Speed Communication Circuits Lecture 7 High Freqeuncy, Broadband Amplifiers 6.776 High Speed Communication Circuits Lecture 7 High Freqeuncy, Broadband Amplifiers Massachusetts Institute of Technology February 24, 2005 Copyright 2005 by Hae-Seung Lee and Michael H. Perrott High

More information

Microelectronic Devices and Circuits Lecture 22 - Diff-Amp Anal. III: Cascode, µa Outline Announcements DP:

Microelectronic Devices and Circuits Lecture 22 - Diff-Amp 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 information

Lecture 20 Transistor Amplifiers (II) Other Amplifier Stages. November 17, 2005

Lecture 20 Transistor Amplifiers (II) Other Amplifier Stages. November 17, 2005 6.012 Microelectronic Devices and Circuits Fall 2005 Lecture 20 1 Lecture 20 Transistor Amplifiers (II) Other Amplifier Stages November 17, 2005 Contents: 1. Common source amplifier (cont.) 2. Common drain

More information

Building Blocks of Integrated-Circuit Amplifiers

Building Blocks of Integrated-Circuit Amplifiers CHAPTER 7 Building Blocks of Integrated-Circuit Amplifiers Introduction 7. 493 IC Design Philosophy 7. The Basic Gain Cell 494 495 7.3 The Cascode Amplifier 506 7.4 IC Biasing Current Sources, Current

More information

Small signal ac equivalent circuit of BJT

Small signal ac equivalent circuit of BJT UNIT-2 Part A 1. What is an ac load line? [N/D 16] A dc load line gives the relationship between the q-point and the transistor characteristics. When capacitors are included in a CE transistor circuit,

More information

ANALYSIS AND DESIGN OF ANALOG INTEGRATED CIRCUITS

ANALYSIS 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 information

55:041 Electronic Circuits The University of Iowa Fall Exam 1 Solution

55:041 Electronic Circuits The University of Iowa Fall Exam 1 Solution Exam 1 Name: Score /60 Question 1 Short takes. For True/False questions, write T, or F in the right-hand column as appropriate. For other questions, provide answers in the space provided. 1. Tue of false:

More information

Current Mirrors. Prof. Tai-Haur Kuo, EE, NCKU, Tainan City, Taiwan 4-1

Current Mirrors. Prof. Tai-Haur Kuo, EE, NCKU, Tainan City, Taiwan 4-1 Current Mirrors Prof. Tai-Haur Kuo, EE, NCKU, Tainan City, Taiwan 4- 郭泰豪, Analog C Design, 08 { Prof. Tai-Haur Kuo, EE, NCKU, Tainan City, Taiwan 4- 郭泰豪, Analog C Design, 08 { Current Source and Sink Symbol

More information

Preliminary Exam, Fall 2013 Department of Electrical and Computer Engineering University of California, Irvine EECS 170B

Preliminary Exam, Fall 2013 Department of Electrical and Computer Engineering University of California, Irvine EECS 170B Preliminary Exam, Fall 2013 Department of Electrical and Computer Engineering University of California, Irvine EECS 170B Problem 1. Consider the following circuit, where a saw-tooth voltage is applied

More information

EE105 Fall 2015 Microelectronic Devices and Circuits

EE105 Fall 2015 Microelectronic Devices and Circuits EE105 Fall 2015 Microelectronic Devices and Circuits Prof. Ming C. Wu wu@eecs.berkeley.edu 511 Sutardja Dai Hall (SDH) 11-1 Transistor Operating Mode in Amplifiers Transistors are biased in flat part of

More information

Experiment #6 MOSFET Dynamic circuits

Experiment #6 MOSFET Dynamic circuits Experiment #6 MOSFET Dynamic circuits Jonathan Roderick Introduction: This experiment will build upon the concepts that were presented in the previous lab and introduce dynamic circuits using MOSFETS.

More information

Chapter 5. Operational Amplifiers and Source Followers. 5.1 Operational Amplifier

Chapter 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 information

Analog Integrated Circuit Configurations

Analog Integrated Circuit Configurations Analog Integrated Circuit Configurations Basic stages: differential pairs, current biasing, mirrors, etc. Approximate analysis for initial design MOSFET and Bipolar circuits Basic Current Bias Sources

More information

EXP8: AMPLIFIERS II.

EXP8: AMPLIFIERS II. EXP8: AMPLIFIES II. Objectives. The objectives of this lab are:. To analyze the behavior of a class A amplifier. 2. To understand the role the components play in the gain of the circuit. 3. To find the

More information

Advanced Operational Amplifiers

Advanced Operational Amplifiers IsLab Analog Integrated Circuit Design OPA2-47 Advanced Operational Amplifiers כ Kyungpook National University IsLab Analog Integrated Circuit Design OPA2-1 Advanced Current Mirrors and Opamps Two-stage

More information

d. Why do circuit designers like to use feedback when they make amplifiers? Give at least two reasons.

d. Why do circuit designers like to use feedback when they make amplifiers? Give at least two reasons. EECS105 Final 5/12/10 Name SID 1 /20 2 /30 3 /20 4 /20 5 /30 6 /40 7 /20 8 /20 Total 1. Give a short answer to each question a. Your friend from Stanford says that he has designed a three-stage high gain

More information

Phy 335, Unit 4 Transistors and transistor circuits (part one)

Phy 335, Unit 4 Transistors and transistor circuits (part one) Mini-lecture topics (multiple lectures): Phy 335, Unit 4 Transistors and transistor circuits (part one) p-n junctions re-visited How does a bipolar transistor works; analogy with a valve Basic circuit

More information

COMPARISON OF THE MOSFET AND THE BJT:

COMPARISON OF THE MOSFET AND THE BJT: COMPARISON OF THE MOSFET AND THE BJT: In this section we present a comparison of the characteristics of the two major electronic devices: the MOSFET and the BJT. To facilitate this comparison, typical

More information

Basic Circuits. Current Mirror, Gain stage, Source Follower, Cascode, Differential Pair,

Basic Circuits. Current Mirror, Gain stage, Source Follower, Cascode, Differential Pair, Basic Circuits Current Mirror, Gain stage, Source Follower, Cascode, Differential Pair, CCS - Basic Circuits P. Fischer, ZITI, Uni Heidelberg, Seite 1 Reminder: Effect of Transistor Sizes Very crude classification:

More information

In a cascade configuration, the overall voltage and current gains are given by:

In a cascade configuration, the overall voltage and current gains are given by: ECE 3274 Two-Stage Amplifier Project 1. Objective The objective of this lab is to design and build a direct coupled two-stage amplifier, including a common-source gain stage and a common-collector buffer

More information

EECE488: Analog CMOS Integrated Circuit Design Set 7 Opamp Design

EECE488: 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 information

ITT Technical Institute. ET215 Devices 1. Chapter

ITT Technical Institute. ET215 Devices 1. Chapter ITT Technical Institute ET215 Devices 1 Chapter 4.6 4.7 Chapter 4 Section 4.6 FET Linear Amplifiers Transconductance of FETs The output drain current is controlled by the input signal voltage. As we earlier

More information

BJT Amplifier. Superposition principle (linear amplifier)

BJT 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 information

ES 330 Electronics II Fall 2016

ES 330 Electronics II Fall 2016 ES 330 Electronics II Fall 2016 Sect Lectures Location Instructor Office Office Hours Email Tel 001 001 9:00 am to 9:50 am Wednesday 10:00 am to 10 :50 am 2001 2001 Dr. Donald Estreich Dr. Donald Estreich

More information

Last time: BJT CE and CB amplifiers biased by current source

Last time: BJT CE and CB amplifiers biased by current source Last time: BJT CE and CB amplifiers biased by current source Assume FA regime, then VB VC V E I B I E, β 1 I Q C α I, V 0. 7V Calculate V CE and confirm it is > 0.2-0.3V, then BJT can be replaced with

More information

Bipolar Junction Transistors (BJTs) Overview

Bipolar Junction Transistors (BJTs) Overview 1 Bipolar Junction Transistors (BJTs) Asst. Prof. MONTREE SIRIPRUCHYANUN, D. Eng. Dept. of Teacher Training in Electrical Engineering, Faculty of Technical Education King Mongkut s Institute of Technology

More information

Chapter 4. CMOS Cascode Amplifiers. 4.1 Introduction. 4.2 CMOS Cascode Amplifiers

Chapter 4. CMOS Cascode Amplifiers. 4.1 Introduction. 4.2 CMOS Cascode Amplifiers Chapter 4 CMOS Cascode Amplifiers 4.1 Introduction A single stage CMOS amplifier cannot give desired dc voltage gain, output resistance and transconductance. The voltage gain can be made to attain higher

More information

Figure 1: JFET common-source amplifier. A v = V ds V gs

Figure 1: JFET common-source amplifier. A v = V ds V gs Chapter 7: FET Amplifiers Switching and Circuits The Common-Source Amplifier In a common-source (CS) amplifier, the input signal is applied to the gate and the output signal is taken from the drain. The

More information

UNIT-1 Bipolar Junction Transistors. Text Book:, Microelectronic Circuits 6 ed., by Sedra and Smith, Oxford Press

UNIT-1 Bipolar Junction Transistors. Text Book:, Microelectronic Circuits 6 ed., by Sedra and Smith, Oxford Press UNIT-1 Bipolar Junction Transistors Text Book:, Microelectronic Circuits 6 ed., by Sedra and Smith, Oxford Press Figure 6.1 A simplified structure of the npn transistor. Microelectronic Circuits, Sixth

More information

Analysis and Design of Analog Integrated Circuits Lecture 8. Cascode Techniques

Analysis and Design of Analog Integrated Circuits Lecture 8. Cascode Techniques Analysis and Design of Analog Integrated Circuits Lecture 8 Cascode Techniques Michael H. Perrott February 15, 2012 Copyright 2012 by Michael H. Perrott All rights reserved. Review of Large Signal Analysis

More information

Pg: 1 VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur 603 203 Department of Electronics & Communication Engineering Regulation: 2013 Acadamic Year : 2015 2016 EC6304 Electronic Circuits I Question

More information

EECS3611 Analog Integrated Circuit Design. Lecture 3. Current Source and Current Mirror

EECS3611 Analog Integrated Circuit Design. Lecture 3. Current Source and Current Mirror EECS3611 Analog ntegrated Circuit Design Lecture 3 Current Source and Current Mirror ntroduction Before any device can be used in any application, it has to be properly biased so that small signal AC parameters

More information

Basic Electronics Prof. Dr. Chitralekha Mahanta Department of Electronics and Communication Engineering Indian Institute of Technology, Guwahati

Basic Electronics Prof. Dr. Chitralekha Mahanta Department of Electronics and Communication Engineering Indian Institute of Technology, Guwahati Basic Electronics Prof. Dr. Chitralekha Mahanta Department of Electronics and Communication Engineering Indian Institute of Technology, Guwahati Module: 3 Field Effect Transistors Lecture-8 Junction Field

More information

ECE 442 Solid State Devices & Circuits. 15. Differential Amplifiers

ECE 442 Solid State Devices & Circuits. 15. Differential Amplifiers ECE 442 Solid State Devices & Circuits 15. Differential Amplifiers Jose E. Schutt-Aine Electrical & Computer Engineering University of Illinois jschutt@emlab.uiuc.edu ECE 442 Jose Schutt Aine 1 Background

More information

Design and Simulation of Low Voltage Operational Amplifier

Design and Simulation of Low Voltage Operational Amplifier Design and Simulation of Low Voltage Operational Amplifier Zach Nelson Department of Electrical Engineering, University of Nevada, Las Vegas 4505 S Maryland Pkwy, Las Vegas, NV 89154 United States of America

More information

Radio Frequency Electronics

Radio Frequency Electronics Radio Frequency Electronics Active Components IV Samuel Morse Born in 79 in Massachusetts Fairly accomplished painter After witnessing various electrical experiments, got intrigued by electricity Designed

More information

IFB270 Advanced Electronic Circuits

IFB270 Advanced Electronic Circuits IFB270 Advanced Electronic Circuits Chapter 9: FET amplifiers and switching circuits Prof. Manar Mohaisen Department of EEC Engineering Review of the Precedent Lecture Review of basic electronic devices

More information

CHAPTER 8 DIFFERENTIAL AND MULTISTAGE AMPLIFIERS

CHAPTER 8 DIFFERENTIAL AND MULTISTAGE AMPLIFIERS CHAPTER 8 DIFFERENTIAL AND MULTISTAGE AMPLIFIERS Chapter Outline 8.1 The CMOS Differential Pair 8. Small-Signal Operations of the MOS Differential Pair 8.3 The BJT Differential Pair 8.4 Other Non-ideal

More information

Linear electronic. Lecture No. 1

Linear electronic. Lecture No. 1 1 Lecture No. 1 2 3 4 5 Lecture No. 2 6 7 8 9 10 11 Lecture No. 3 12 13 14 Lecture No. 4 Example: find Frequency response analysis for the circuit shown in figure below. Where R S =4kR B1 =8kR B2 =4k R

More information

Homework Assignment 10

Homework Assignment 10 Homework Assignment 10 Question 1 (Short Takes) Two points each unless otherwise indicated. 1. What is the 3-dB bandwidth of the amplifier shown below if r π = 2.5K, r o = 100K, g m = 40 ms, and C L =

More information

DC Bias. Graphical Analysis. Script

DC Bias. Graphical Analysis. Script Course: B.Sc. Applied Physical Science (Computer Science) Year & Sem.: Ist Year, Sem - IInd Subject: Electronics Paper No.: V Paper Title: Analog Circuits Lecture No.: 3 Lecture Title: Analog Circuits

More information

ANALYSIS AND DESIGN OF ANALOG INTEGRATED CIRCUITS

ANALYSIS 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 information

Radivoje Đurić, 2015, Analogna Integrisana Kola 1

Radivoje Đurić, 2015, Analogna Integrisana Kola 1 OTA-output buffer 1 According to the types of loads, the driving capability of the output stages differs. For switched capacitor circuits which have high impedance capacitive loads, class A output stage

More information

Electronic Circuits EE359A

Electronic Circuits EE359A Electronic Circuits EE359A Bruce McNair B206 bmcnair@stevens.edu 201-216-5549 Lecture 18 488 Class C operation 4 2 h( t) 0 2 4 0 0.2 0.4 0.6 0.8 t 0 ( ) 20 log A j 20 40 60 0 10 20 30 Cconduction_angle

More information

The Differential Amplifier. BJT Differential Pair

The Differential Amplifier. BJT Differential Pair 1 The Differential Amplifier Asst. Prof. MONTREE SRPRUCHYANUN, D. Eng. Dept. of Teacher Training in Electrical Engineering, Faculty of Technical Education King Mongkut s nstitute of Technology North Bangkok

More information

Single-Stage BJT Amplifiers and BJT High-Frequency Model. Single-Stage BJT Amplifier Configurations

Single-Stage BJT Amplifiers and BJT High-Frequency Model. Single-Stage BJT Amplifier Configurations 1 Single-Stage BJT Amplifiers and BJT High-Frequency Model Asst. Prof. MONTREE SIRIPRUCHYANUN, D. Eng. Dept. of Teacher Training in Electrical Engineering, Faculty of Technical Education King Mongkut s

More information

Mini Project 2 Single Transistor Amplifiers. ELEC 301 University of British Columbia

Mini Project 2 Single Transistor Amplifiers. ELEC 301 University of British Columbia Mini Project 2 Single Transistor Amplifiers ELEC 301 University of British Columbia 44638154 October 27, 2017 Contents 1 Introduction 1 2 Investigation 1 2.1 Part 1.................................................

More information

Tutorial 2 BJTs, Transistor Bias Circuits, BJT Amplifiers FETs and FETs Amplifiers. Part 1: BJTs, Transistor Bias Circuits and BJT Amplifiers

Tutorial 2 BJTs, Transistor Bias Circuits, BJT Amplifiers FETs and FETs Amplifiers. Part 1: BJTs, Transistor Bias Circuits and BJT Amplifiers Tutorial 2 BJTs, Transistor Bias Circuits, BJT Amplifiers FETs and FETs Amplifiers Part 1: BJTs, Transistor Bias Circuits and BJT Amplifiers 1. Explain the purpose of a thin, lightly doped base region.

More information