Can get the gm by AC analysis; S6 y$ N5 e& w% O- @# y
9 _% a+ a7 n+ n
vin1 vi1 gnd xx ac 1# }* a) T' P: Y! g
vin2 vi2 gnd yy1 a1 p U: l5 y) D! P- G
.ac lin 1 1 2 6 Q" G& O) O ^8 `: A 6 l( }& |! r- d" S. Q$ dyou can see the gm(at 1Hz fre) from 'output current Mag'