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Simulators >> Circuit Simulators >> transient simulation with s-parameter file
https://designers-guide.org/forum/YaBB.pl?num=1394751428

Message started by sammy_bee on Mar 13^th, 2014, 3:57pm

Title: transient simulation with s-parameter file
Post by sammy_bee on Mar 13^th, 2014, 3:57pm

What possibly could go wrong with during a transient simulation with an S-parameter in spectre ? I was just trying to measure the resistance of a bondwire. I have modeled the bondwire as an S parameter file. I had a voltage step at the input with a current source at the output of the nport instance. The resistance value seems too high.

Title: Re: transient simulation with s-parameter file
Post by sheldon on Mar 13^th, 2014, 10:06pm

It appears that you are trying to measure a dc, low frequency,
quantity. What was the minimum frequency you defined in your
s-parameter file? Did you define a dc value? If the minimum
frequency is 100MHz and you are trying to get a dc value then
did you do anything to improve the dc value estimation, for
example, set dcextrap? More/any detail about what you are doing
would be helpful.

Title: Re: transient simulation with s-parameter file
Post by sammy_bee on Mar 14^th, 2014, 8:06am

I had the DC extrapolation set to unwrap and the minimum frequency is 10Hz

Title: Re: transient simulation with s-parameter file
Post by Andrew Beckett on Mar 16^th, 2014, 1:08am

Which version of the simulator are you using? What options have you set on the nport (ideally show the line in the input.scs so we can see all the options).

Kind Regards,

Andrew.