gm/id help
Gm/Id and Kbeta are OP output parameters. vt=k*T/q. W and L are known.
I define W,L of mos, than compute OP, check that one in weak inversion, compute I0.
Using I0 i set IC, calculate W (L is known), get new I0, and so long.
I0 serves only to calculate W if IC is defined. It isn't goal for me to get precise I0 value, because OP parameters are calculated from W and L. Always i can check IC by viewing Gm/Id value. IC means the same as W/L if ID doesn't change.