Small signal model CMOS !!

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biolycans

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Hi all !

I would like to know why in the small signal analysis in CMOS technology, the current source becomes an open circuit.

Regards,

Joaquin
 

biolycans said:
.... in the small signal analysis in CMOS technology, the current source becomes an open circuit.
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Hi,

Can to tell which current source you are talking about .... In any MOS small signal model there is a voltage dependent current source (gm Vgs) .... but it becomes open ckt only if Vgs = 0 else not ....
 

The internal resistance of an ideal current source is infinite. An independent current source with zero current is identical to an ideal open circuit.
 

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