The amplifier as shown has R2 = 68 kΩ and R1 = 2.7 kΩ. What are the valuesof Av A, Av B, Av C, RinA, RinB, RinC, and RoutA, RoutB, RoutC, for the amplifier equivalent circuit as shown. (a)Closed-loop feedback amplifierR2R1RoutA, Rid, RVidRinA, Vid(b) Ag, Rin. Rout(c) Closed-loop feedback amplifier two-port modelFigure 12.1 (a) Three-stage amplifier cascade; (b) single stage inverting amplifier using an operational amplifier; (c) two-portrepresentation for each feedback amplifier stage. RoutCRout BRoatAVinCRinCApCUincRinBVin BApgVinBUinARiaARout = RoutCRin = RinaA, = ApA · ApB ArcFigure 12.2 Two-port representation for three-stage cascaded amplifier.O+

Given : R2=68k ohm,R1= 2.7k ohm

Answered: (a) Closed-loop feedback amplifier R2…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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The amplifier as shown has R₂ = 68 kΩ and R₁ = 2.7 kΩ. What are the values
of A_{v A}, A_{v B}, A_{v C}, R_inA, R_inB, R_inC, and R_outA, R_outB, R_outC, for the amplifier equivalent circuit as shown.

(a)
Closed-loop feedback amplifier
R2
R1
Rout
A, Rid, R
Vid
Rin
A, Vid
(b) Ag, Rin. Rout
(c) Closed-loop feedback amplifier two-port model
Figure 12.1 (a) Three-stage amplifier cascade; (b) single stage inverting amplifier using an operational amplifier; (c) two-port
representation for each feedback amplifier stage.

RoutC
Rout B
RoatA
VinC
RinC
ApCUinc
RinB
Vin B
ApgVinB
UinA
RiaA
Rout = RoutC
Rin = Rina
A, = ApA · ApB Arc
Figure 12.2 Two-port representation for three-stage cascaded amplifier.
O+

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