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Modeling >> Transmission Lines and Other Distributed Devices >> Broadband Circuit Transmission Line Modeling in Spectre
https://designers-guide.org/forum/YaBB.pl?num=1536543568

Message started by repah on Sep 9^th, 2018, 6:39pm

Title: Broadband Circuit Transmission Line Modeling in Spectre
Post by repah on Sep 9^th, 2018, 6:39pm

Hello,

I am designing broadband circuits in Cadence Virtuoso/Spectre and modeling the transmission lines in an EM solver and importing the S Parameters.

My circuits are broadband over - say 0-40 GHz.

My question - can I use the S Parameters from the EM solver (touchstone) using an n port in Virtuoso/Spectre and run transient analysis in Cadence Virtuoso/Spectre to see - say eye diagrams ?

What issues will I face ? Can I use the n port for transient analysis ?

Thank you.

Title: Re: Broadband Circuit Transmission Line Modeling in Spectre
Post by deba on Sep 14^th, 2018, 6:26am

Hi,

Yes you can use n-port for transient analysis. Look out for interpolation methods, rational order etc. Last I heard there is a new method called BBSPICE(broad band spice) available for interpolation.

Title: Re: Broadband Circuit Transmission Line Modeling in Spectre
Post by Frank Wiedmann on Sep 17^th, 2018, 2:27am

Take a look at https://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=20279103. In most cases, the BBSPICE method works best.