Simulation of large signal return loss

[Mohamed Megahed]

Hello,

I am building a voltage mode driver for a SERDES transceiver, I am trying to run simulations using spectre to check the return loss of the driver, but normal s-parameter simulation matches to small signal impedance only, not to Ron of the device which gives me inaccurate results.

Is there a way to simulate large signal return loss using Spectre?

M.Megahed

 

[BigBoss]

Yes..
LSSP ( Large Signal S Parameters ) simulation is available in Cadence MMSIM package.
Or you may also do a PSS analysis by connecting a current probe at the input and then you can find Large Signal Input Impedance by using calculator ( as usual V/I).
Essentially Zin=V/I ( V and I complex quantities ).