simplsoft
Full Member level 2
The basic idea is to run M3 and M17 current sources with equal current and thus keep M14 and M15 free of DC bias current. If so, there's only AC signal across M14/M15 drain-source. Scaling M16 varies M14/M15 Vgs and changes the source degeneration resistance respectively.
Can ISS of M17 and M18 be varied so that we can vary the resistance upto a certain extent in such a way that the transistor M14 and M15 remain in triode?In stead of scaling M16 so that we can make it tunable?