Re: Properties of common source, source follower, common gat
Lots of info on the web! But briefly:
1. Common source
high input impedance, low output impedance, high gain, BW varies inversely with gain. Common voltage amplifier circuit.
2. Common gate
low input impedance, low output impedance, low gain, high BW, unity current gain. Common current regulator circuit.
3. Common drain (also called source follower)
high input impedance, low output impedance, unity voltage gain, high BW. Common voltage buffer circuit, impedance matching, simple output stage.