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I am having some difficulty simulating the PFD/CP noise. I have the output noise of the charge pump in PSS (after setting the phase difference b/w ref and feedback to 0). The transfer function from here to PLL output should be N/Kphi. But, I am getting unrealistic results if I do this. Any ideas...
Hello,
Does anyone know any freeware software that can do PCB as well as package modeling (sparameters, lumped model, etc).
This would be the equivalent of ASITIC on the RF PCB side.
If you ae in a university, you can get cadence. However, I am not aware of any freeware to measure s-parameters.
The alternative is that in hspice - you can artificially program it with the equaltions for s-parameters to get s-par. I have done this in school and it is a bit painful - but it works.
code matlab for dnl
This is correct - you do need monte carlo simulations done in order to get true INL/DNL
Added after 3 minutes:
Does anyone know about the mismatch models in the TSMC 90 nm design kit? Is it reliable?
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