# quick way to get Thevenin voltage

Discussion in 'Homework Help' started by screen1988, Mar 20, 2013.

1. ### screen1988 Thread Starter Member

Mar 7, 2013
310
4
Please see my attached file.
This is a text from my textbook:
To calculate $V_{Y}$, we note that M1 drivers M2 as a source follower and replace $V_{in1}$ and M1 by a Thevenin equivalent: the Thevenin voltage $V_{in1}= V_{T}$ the resistance $R_{T}=\dfrac {1} {g_{m1}}$.

I see that the book mention this problem is very simple and the solution to get Thevenin voltage and resistance aren't given.
I had to draw two small signal models of M1 and M2 to figure out the value of Thevenin voltage and resistance.
Therefore, I think you, experts, do you have any quick way to get the Thevenin voltage and resistance? Or you also have to draw small signal model as I did?

File size:
35.7 KB
Views:
31