A common-gate amplifier is one of the common configurations of FET electronic amplifier. It is normally used to convert low impedance to high impedance.

Characteristics

Inherent voltage gain:

g_m(R_D | | R_load)

Input resistance:

Current gain:

Output resistance:

R_D

Transistor amplifiers

• Common emitter
• Common collector
• Common base
• Common source
• Common drain
• Common gate