Amplifiers Summary
Contents
Amplifiers Summary#
At-a-glance comparison#
Property |
Common source |
CS w/ degeneration |
Common drain |
Common gate |
Cascode |
|---|---|---|---|---|---|
Gain |
High |
Medium |
Low |
Medium |
Highest |
\(R_{\text{in}}\) |
\(\infty\) |
\(\infty\) |
\(\infty\) |
Low |
\(\infty\) |
\(R_{\text{out}}\) |
Medium |
High |
Low |
Medium (high if \(R_s=0\)) |
High |
Application |
General amplifier |
High-speed op amp |
Buffer |
Impedance matching amplifier |
High-precision closed-loop op amp |