Re: MOS11 noise implementation in Verilog-A

Ilya -
I recall a discussion (don't recall the context) about writing
noise PSDs -- and thus the need to allow access to the small-signal
analysis frequency at which the noise analysis is performed.

The main problem is in specifying what this "$freq" should do in
other analyses: should it only be allowed in noise expressions?
Are there other cases that one might think one wanted $freq in
a transient analysis?

The "j" would be another odd beast; you'd like to restrict its
use to noise analysis, but I can imagine people wanting it for
complex filters or for constructing a signal with a quadrature
component.

-Geoffrey

Ilya Yusim wrote:
>
> Geoffrey,
>
> I agree that using extra nodes and a capacitor to implement the j
> factor, will enable us to write most practical noise functions. The
> Verilog-A compiler can even go further and try to reduce this node. But
> wouldn't it be easier for the user to just write the complete noise PSD
> equation directly, including the j factor. Of course, this would
> require a language extension.
>
> Ilya
Received on Thu May 20 07:32:38 2004