How to get dimension of mosfets in start up circuit?
Also, I use equation

I_REF=2*(1-1/√K)^2/(R^2 KP_n W_1/L_1 )

for getting value of resistor R=717 ohm.
Iref=200uA, K=4, W/L=10/0.35, KP_n=170*10e-6.

For that equation i got very bad caracteristic of current. The value of current is bigger.
Maybe for short channel designe i must use some other equation???
Sheme and caracteristic are attached