MOSFET Question Help

Thread Starter

d3ck

Joined Jul 14, 2013
8




Question ask me to find ro and gm. But the problem is I need to find ID first.
My guess to answer this question by doing KVL, VDD - VDS - IDQ(RS) = 0.
From this I know VDS and I know the region is saturaion region.
I use saturation region formula to find ID where I assume VGSQ = VGS.
Am I correct by doing this. Thanks
 
Last edited:

anhnha

Joined Apr 19, 2012
905
Just a learner.

Question ask me to find ro and gm.
As I know, gm and ro is only depend on DC parameters such as VGSQ, VDSQ and IDQ and all these parameters are given.
From VDD - VDSQ - IDQ(RS) = 0, you can find out VDSQ and check if it is in saturation.
All you have to do is substituting these given DC operating parameters into the formulas for gm and ro.
 
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