Can get the gm by AC analysis 2 N3 E% A+ w2 H2 Z' L/ V 6 t6 w3 ]2 s2 x+ D9 [) Y% `) v, Uvin1 vi1 gnd xx ac 19 I6 l. ~: P$ e
vin2 vi2 gnd yy! q+ `3 R7 a$ H* N' w8 z1 M
.ac lin 1 1 25 F& s! z% j' M- x
6 c8 W2 F, e0 z) \: S& V4 V# s$ n0 qyou can see the gm(at 1Hz fre) from 'output current Mag'