The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> RF Simulators >> How do you simulate differential s parameters using LSSP?
https://designers-guide.org/forum/YaBB.pl?num=1459043907

Message started by iVenky on Mar 26^th, 2016, 6:58pm

Title: How do you simulate differential s parameters using LSSP?
Post by iVenky on Mar 26^th, 2016, 6:58pm

I am trying to figure out the s-parameters of a push pull class B power amplifier, but the problem is that the input is differential. I am allowed to enter only one input port on the LSSP window in Cadence Virtuoso when I actually have two ports at the input (one for positive terminal and other one for negative terminal which as a phase difference of 180 with respect to the positive terminal). How do you plot differential s-parameters in this case?
I have attached the schematic for better understanding.

Title: Re: How do you simulate differential s parameters using LSSP?
Post by Ken Kundert on Mar 26^th, 2016, 7:45pm

See Measuring S-Parameters of a Differential Mixer.

-Ken

Title: Re: How do you simulate differential s parameters using LSSP?
Post by iVenky on Mar 30^th, 2016, 12:02am

Hi Ken,

Thank you very much. Didn't actually think that you would reply :) I have enjoyed reading up your stuffs :) I used a balun at the input to solve this issue so that I had only one input port.

Thanks

Title: Re: How do you simulate differential s parameters using LSSP?
Post by Ken Kundert on Mar 30^th, 2016, 12:43am

Thanks.

I like to promote the ideal balun. I find that many people do not know about them, or if they do, they don't use them as much as they should. I find life is just better with baluns.

-Ken