On Apr 28, 3:40 pm, "S. Badel" <stephane.ba...@[EMAIL PROTECTED]
>
wrote:
> > I want to do an ac analysis to a single-ended opamp.
> > I'm having some difficulty to decide how to do the test bench's and if
> > I should add a vsin signal to the circuit. How should I specify the
> > input signal?
>
> It doesn't matter which type of source you are using, as they all have
AC =
parameters available.
> Rather choose it according to the signal shape you want during transient
s=
imulation.
>
> For AC, the simplest setting is to just set the AC magnitude to 1.
>
> See 'spectre -h vsource' for a list of parameters (I'm assuming you're
usi=
ng spectre).
>
> > Furthermore, Can anyone tell me what's "Y element"?
>
> I guess it depends... could be an element with the shape of a Y. Or an
ele=
ment modeled with
> Y-parameters (http://en.wikipedia.org/wiki/Admittance_parameters).
>
> St=E9phane
At first, thanks for your reply.
"Rather choose it according to the signal shape you want during
transient simulation. "
Sorry, I didn't understand. Did you mean that if I want to put, in the
transient simulation a DC signal, I should at it in the AC simulation?
I don't know if it helps, but the opamp will have feedback (it will
make part of a current source composed by an opamp, a nmos and a
resistor).
Thanks
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