urian
Junior Member
Offline
Posts: 30
|
hi,there Recently i find a model of ideal opamp building with ideal components from analogLib in cadence IC5.It is shown below. I think the net A and B are equal to inp and inn,so what's the effect of the two vcvs connecting them? Is it necessary? So as the net C and D,E and F.I think they are also equal with each other.So what does the second and third vcvs components perform? The gains of vcvs are all set to 1
And with the cmdmprobe component be placed in the end while the CMDM parameter be set to -1,dose it is used for the differential loop gain simulation?Like using a stb analysis to see the gain and phase of the closed-loop(open-loop?)?
BTW,I find there is iprobes in the cmdmprobe.Coz I dont use iprobe before.I guess that iprobe is a replacement of Middlebrook' method for loop stimulation.So I need not to inject a AC source and large res or cap or inductor like the classic method do,is it right?
Thanks in advance for any help!
Best regards urian
|