How to increase vds if I bias a transistor in linear range?

[analog_prodigy]

Hi,

If i bias a transistor in linear range (in cascode current mirror) i.e., vgs>vth & vds < Vds,sat; then how to increase vds?
In a current mirror, Ibias decides Vgs.
As per long channel current equation, if we change (W/L), vds,sat changes. But how to change vds?

 

[Usman Hai]

Re: One basic question

Vds is usually set by upper transistor