FET Amplifier Circuits Analysis

Slides:

Advertisements

Similar presentations

FET Small-Signal Analysis

Advertisements

FET ( Field Effect Transistor)

1 JFET Bollen. 2 AGENDA Bollen JFET Overview JFET vs BJT Physical structure Working Input parameters DC formula Output parameters Transconductance Ac.

Lecture 7 Frequency Response.

FET AND ITS APPLICATIONS UNIT - III 7/2/2015www.noteshit.com1.

JFET and MOSFET Amplifiers

Robert Boylestad Digital Electronics Copyright ©2002 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Chapter 9: FET.

Basics of Operational Amplifiers

JFET Biasing ELEC 121. January 2004ELEC 1212 JFET Fixed Bias R G is present to limit current in case V GG is connected with wrong polarity This would.

4. Design of Multistage Amplifiers

Recall Lecture 17 MOSFET DC Analysis 1.Using GS (SG) Loop to calculate V GS Remember that there is NO gate current! 2.Assume in saturation Calculate I.

FET AND ITS APPLICATIONS UNIT - III. Field Effect Transistor Family.

Chapter 8: FET Amplifiers

Recall Last Lecture Biasing of BJT Applications of BJT

Recall Last Lecture Biasing of BJT Three types of biasing

UNIT- V Small Signal Low Frequency Transistor Amplifier Models:

Chapter 1 Introduction to Electronics

Chapter 7: FET Biasing.

Field Effect Transistors

Part B – The Transistor at high frequency

Recall Last Lecture Biasing of BJT Three types of biasing

Signal transfer circuits with FETs

Recall Last Lecture Biasing of BJT Three types of biasing

The JUNCTION FIELF EFFECT TRANSISTOR (JFET) n channel JFET

Electronic Devices and Circuit Theory

EMT 112 / 4 ANALOGUE ELECTRONICS

Exercise 1 In Fig. 1, run the analysis, and verify that the overall voltage gain Av=V0/Vs=-25.74, input resistance at VS = 15.44K, output resistance at.

ANALOGUE ELECTRONICS CIRCUITS I

ANALOGUE ELECTRONICS I

Recall Lecture 17 MOSFET DC Analysis

GOVERMENT ENGINEERING COLLEGE

Feedback No feedback : Open loop (used in comparators)

HW#10 will be posted tonight

COMMON-GATE AMPLIFIER

Recall Last Lecture Introduction to BJT Amplifier

ANALOGUE ELECTRONICS I

FET Amplifiers.

Recall Lecture 14 Introduction to BJT Amplifier

Recall Lecture 17 MOSFET DC Analysis

ANALOGUE ELECTRONICS I

Recall Lecture 13 Biasing of BJT Voltage Divider Biasing Circuit.

Chapter 5: BJT AC Analysis

Recall Lecture 17 MOSFET DC Analysis

FET Small Signal Analysis ENGI 242 ELEC 222. March 2003FET Small Signal Bias2 g m at Q.

CASCODE AMPLIFIER.

Lecture 21 REMINDERS OUTLINE Frequency Response Reading: Chapter 11

Last time Large signal DC analysis Current mirror example

Common-Base Amplifier

ECE 333 Linear Electronics

PE-Electrical Review Course - Class 4 (Transistors)

HW#10 will be posted tonight

Satish Pradhan Dnyanasadhana College, Thane

Recall Last Lecture Introduction to BJT Amplifier

Principles & Applications Small-Signal Amplifiers

Last time Reviewed 4 devices in CMOS Transistors: main device

Miller equivalent circuit

Recall Last Lecture Introduction to BJT Amplifier

Recall Lecture 17 MOSFET DC Analysis

Bipolar Junction Transistor

Operational Amplifier (Op-Amp)-μA741

Chapter 8: FET Amplifiers

TRANSISTOR AMPLIFIER CONFIGURATION -BJT Common-Emitter Amplifier-

Voltage Divider Circuit

VDD Vin+ CL Vin- Vb3 folded cascode amp Vb2 Vb1 Vb4 Vb5.

Common-Collector (Emitter-Follower) Amplifier

Common-Collector (Emitter-Follower) Amplifier

Recall Last Lecture Introduction to BJT Amplifier

Common-Collector (Emitter-Follower) Amplifier

Analysis of Single Stage Amplifiers

Presentation transcript:

FET Amplifier Circuits Analysis FET amplifier parameter gm CS amplifiers CS with RS amplifiers SF amplifiers Bootstrap amplifier CG amplifiers 1

Types of FET amplifiers (MOSFET) (a) Common Source (CS) High AV and high Ri Voltage amplifications (b) Common Source (CS) with RS Low AV and high Ri Stability applications (c) Source Follower (SF) Very low Ro and high Ri Buffer applications (d) Common Gate (CG) Very low Ri and high AV High Frequency applications 2

FET amplifier parameter gm MOSFET-self-bias amplifier 3

FET amplifier parameter gm MOSFET-voltage divider-bias amplifier 4

Example: Find gm of the given FET amplifier 5

Example: Find gm of the given FET amplifier 6

CS amplifier analysis Rin = RG Ro = RD MOSFET-self-bias CS amplifier MOSFET-voltage divider-bias CS amplifier Rin = RG Ro = RD 7

CS with RS amplifier analysis JFET-self-bias CSwithRS amplifier MOSFET-voltage divider-bias CS withRS amplifier approximate Rin = RG Ro = RD 8

SF amplifier analysis Rin = RG Ro = RS//1/gm JFET-self-bias SF amplifier MOSFET-v.divider-bias SF amplifier Rin = RG Ro = RS//1/gm 9

Example: 10

Bootstrap Amplifier analysis Miller’s Theorem Rin 11

Miller’s Theorem applied to Bootstrap amplifier Rin Miller’s resistor RG is connected between Vin and Vo2 12

Example: Find Rin of the following Bootstrap CS amplifier 1. Find gm 2. Find Vo1/Vin=AV1 3. Find Rin = RM1 13

CG Amplifier MOSFET-self-bias CG amplifier MOSFET-voltage divider-bias CG amplifier 14

CG amplifier analysis 15