Hello,
I'm having trouble with problem 8.7.
One of the constraints for operation in the saturation region is
vDS = vGS-VT
My question:
What is vDS in this scenario?
I assume it is: vDS = vO -(-VS)
i.e. vDS = vO+VS
...and similarly..
vGS = vIn - (-VS)
i.e. vGS = vIn + VS
Is this correct?

I cannot get my answer to match the answer in the back of the book and I suspect it is related to this.
Thanks in advance,
- Randy

Question

Hello, 
I'm having trouble with problem 8.7.
One of the constraints for operation in the saturation region is
 vDS >= vGS-VT
My question:
 What is vDS in this scenario? 
I assume it is: vDS = vO -(-VS)
i.e. vDS = vO+VS
...and similarly..
vGS = vIn - (-VS)
i.e. vGS = vIn + VS
Is this correct?

I cannot get my answer to match the answer in the back of the book and I suspect it is related to this.
Thanks in advance,
- Randy

anonymous · Answer

I'm attaching an image to show the amplifier circuit that I'm referring to.

anonymous · Answer

Doesn't seem like there's much help out here. I posted a simple question that is directly from the book associated with this course. That was 11 days ago, and no help.
When I signed up, I think the claim was that most questions are answered within 45 minutes. 
Bummer. 
I was hoping to find people, like myself, who are trying to work through problems at the end of each chapter in the book.