Help me identify the circuit in the output stage

[maori]

im a newby...can anyone explain about this circuit..how it flow.
how it performed..and how each transistor operate

here i attach the picture of the design.

please HELP..im really desperate.

 

[satyasiva]

common source stage.

I feel it's not a cs stage. it's an inverter

 

[nxing]

common source stage.

YEs, it's just an inverter with lots of gain

 

[Aravind_tucson]

Re: common source stage.

I agreee with satyasiva but believe that M5 and M7 form a CS stage if gate of M7 is connected to a fixed bias.

 

[maziaar83]

common source stage.

Hi
It is the output stage of an Operational Amplifiers

they are not Common source, they are Common drain (source follower)

it is a buffer

this stage has very high input impedance and very low output resistance