Hello every specialist (My English is bad, so if there have any wrong diction, please forgive me :) )
I have a problem in P-Spice (I use Cadence P-Spice 10.5) I don't know how to use P-spice to simulate Gm (Transconductance) I make a power AMP, but I want to know what the linearity of class AB output stage the waveform which I want is X-Axis is voltage, like -10, 0 , 10 etc Y-Axis is Gm, the Gm waveform is like a hat
I use DC-sweep to simulate, but i don't know how to make the Y-Axis to Gm Gm is I(out)/V(in) in small signal, in the waveform windows, i set I(out)/V(in) to Y-Axis, the waveform is very stranger, I heard some people say must use differential but I use D() function, the waveform still wrong. It confuse me a lot, please help to solve it!!!!
thanks a lot!!, have a nice day!!!