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common mode half circuit and its gain

only6512

Feb 15, 2014
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Feb 15, 2014
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Hello,everyone,I have a really complex circuit as shown
M4,M7,M14,M15 all pmos
the others->nmos
I am asked to draw common/differential mode half circuit

what i don't know:how to deal with M14,M15?
which mode should I put them into consideration?how to ?
can anyone help me~thanks a lot!!
 

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Harald Kapp

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Nov 17, 2011
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Are you certain your diagram is correct? V2 is at GND potential at the drain of M9. Therefore common mode requires V1=0V, too.
 
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