Hello,I have created a circuit shown below in ltspice using tsmc 180nm mosfets.
unlike the standart way where we bias the mosfets using the large signal furmulas ,I would like to bias the M3,5,1,2 into saturation while M4,6 needs to be linear using charactersitics plots .
How can I make these setting in the circuit below?
Photos and Ltspice files are attached.
Thanks.

https://sites.bu.edu/engcourses/files/2016/08/mosfet-differential-amplifier.pdf

 

Is this part of a school assignment?

 

no its just me learning.
I am imagining every mosfet as a resistor controlled by W and L.
but how can I do the two things:
1.without formulas purrely on caracteristic plots to drive the mosfets of M3,5,1,2 into saturation.
2.again with purely carateristic plots to control the current threw them.