The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> Analog Design >> Generating a differential input in SPICE
https://designers-guide.org/forum/YaBB.pl?num=1112922308

Message started by alfredo_p on Apr 7^th, 2005, 6:05pm

Title: Generating a differential input in SPICE
Post by alfredo_p on Apr 7^th, 2005, 6:05pm

;D

Hi,

Pardon my ignorance, but does anyone know how to generate a differential input signal to stimulate a differential amplifier and analyze its AC behavior in a SPICE simulation?

I've tried to apply a single-ended V AC input passed through an ideal transformer to generate two signals that are opposite in phase. I am seeing decent amplification levels with this approach but I am uncertain about whether the inductance of the transformer would influence the frequency response of the amp.

Thank you very much!

Title: Re: Generating a differential input in SPICE
Post by Ken Kundert on Apr 7^th, 2005, 7:24pm

See http://www.designers-guide.org/Analysis/diff.pdf.

-Ken

Title: Re: Generating a differential input in SPICE
Post by alfredo_p on Apr 7^th, 2005, 10:32pm

Thank you very much! :)