Hello!
Today, I got stuck with this circuit: Source follower using an NMOS transistor as current source.

I want to know what calculation you would do to use the circuit in real world.
What value of I1 do I need?
I think I can choose any value, no problem!
What is the value of Vb?
From the saturation mode, I can figure out Vb.
How do you choose Vin to make M2 operates in saturation mode?
(M1 is always in saturation mode)
I want to know how you would choose Vin to operate.
For me the first thing is to analyse large signal model then choose an operating point.

Can you comment on my method?
Thanks.