What kind of amp is this?

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movinghoon96

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this is problem from razavi's microelectronis - and i'm trying to solve (b)

I think it is source-follower, but my 2 solutions say it is CS Amp(Av = -gmRd)
Am I wrong??

Thank you
 

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Fig. a - Common source amplifier with M2 as a load
Fig. b - Common drain / Voltage Follower with M1 as current source
Fig. c - Common emitter with Q2 as load
Fig. d - Common emitter (load connected to collector of Q2) with Q1 as current source
 

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shlooky said:
Fig. a - Common source amplifier with M2 as a load
Fig. b - Common drain / Voltage Follower with M1 as current source
Fig. c - Common emitter with Q2 as load
Fig. d - Common emitter (load connected to collector of Q2) with Q1 as current source
Click to expand...
Thank you. Sometimes this thing make me confused
 

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