The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> RF Design >> QPSS setup for mixer
https://designers-guide.org/forum/YaBB.pl?num=1627682912

Message started by iwave on Jul 30th, 2021, 3:08pm

Title: QPSS setup for mixer
Post by iwave on Jul 30th, 2021, 3:08pm

Hi,

I want to simulate a Gilbert mixer. I'm looking at various tutorial for simulation setup, and for LO port, the source type is always "sine".

Should the input be a square wave or sine wave?

Title: Re: QPSS setup for mixer
Post by Ken Kundert on Jul 31st, 2021, 3:55pm

Recipes like those should be treated as a conceptual starting point or examples.  They have to be adapted to your situation.  We cannot help you adapt it to your situation because we don't know your situation.

However, having said that, with a Gilbert mixer, you generally use a square wave to drive the LO, and there is no reason from a simulation perspective to avoid square waves as long as you are not using harmonic balance.  If you are using harmonic balance, you should switch to using shooting methods unless there is some strong reason to remain with harmonic balance.  In that case you should crank up the number or harmonics associated with the LO fundamental.

-Ken

The Designer's Guide Community Forum » Powered by YaBB 2.2.2!
YaBB © 2000-2008. All Rights Reserved.