Lecture 27
Amplifier Configurations
Reading:
CE/CS: Jaeger 13.6, 13.9, 13.10, 13.11
CC/CD: Jaeger 14.1, 14.3
CB/CG: Jaeger 14 1 14 4
CB/CG: Jaeger 14.1, 14.4
and Notes
ECE 3040 - Dr. Alan Doolittle
Georgia Tech

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Amplifier Configurations
Voltage Amplifier:
Voltage input and Voltage output
ifier Input
sistance
rce Input
sistance
Resistance
fier Output
sistance
Ampli
Res
Sour
Res
Load R
Amplif
Res
Source
Load
Amplifier
•
Any signal source has a finite “source resistance”, R
S
.
•
The amplifier is often asked to drive current into a load of finite
The controlled source is a Voltage-controlled-Voltage Source
A
O
Ci
i V l
G i
b
f
d b
l i
impedance, R
L
(examples: 8 ohm speaker, 50 ohm transmission line, etc…)
ECE 3040 - Dr. Alan Doolittle
Georgia Tech
v
=Open Circuit Voltage Gain can be found by applying a
voltage source with R
s
=0, and measuring the open circuit output
voltage(no load
or R
L
=infinity)