Re: Independent noise sources in Orcad.

interpasha@xxxxxxxxxxx wrote:
Hi everyone!
I am trying to simulatenoise contribution from a part for which there
is no vendor SPICE model.
Is there an independent noise source I could place on schematic in
orcad?
I am interested in both voltage and current noise sources.
Tried finding it in the libraries, but could not.

Thanks!
Best regards,
Pavel

Ok, what type of noise source? White, pink, grey? What bandwidth? Is this for an AC or transient simulation? How long are you simulating?

When you can answer all these questions, then you are ready to design your own. No one noise source will do answer all of these, so they never tried to design one. There is an app note on using a PRN generator to write to a file to be used as a noise source in conjunction with a Vpwl source. Or, just get your own list of random numbers...

Charlie
.