- #1
CoolDude420
- 201
- 9
Homework Statement
Hi,
so I was trying to derive the small-signal model of a common-source mosfet amplifier that I learned from the notes. Here is what I did,
Now the issue is the i_d branch in the final small-signal circuit. In my lecture notes, that i_d branch is not there at all but when I derived it I do have it there.
The lecture notes goes on to say that the output resistance for this circuit is Rd ∥ Rl ∥ ro. However if you include i_d like in my case, that no longer holds.
How is it possible to remove that id branch?