- #1
Jalo
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Homework Statement
Given the following circuit find the bias point (VDS,IDS).
Homework Equations
The Attempt at a Solution
The first thing I did was find the value of VG, the voltage from the gate of the mosfet to the -VDD source.
VG = VDD * R2/(R1+R2)
To find the current IDS I needed the voltage from the gate to the source, VGS, which is:
VGS = VG - RsID
Since we're operating in the saturation region I can replace ID by:
VGS = VG - Rsk(VGS-VT)^2 (1+λVDS)
where VDS is the voltage between the drain and the source.
I also know that:
VDS = 2VDD - (Rd+Rs)ID
This is as far as I can get. I'm a little confused regarding what I should do next.
If anyone could help I'd appreciate.
Thanks.
Daniel.