Re: Analog filtering for very low frequency signals

From: Joerg (notthisjoergsch_at_removethispacbell.net)
Date: 11/04/04 

Date: Thu, 04 Nov 2004 00:47:16 GMT

Hello Alessandro,

In case all the other methods are not to your liking here is another: Switched capacitor filters. They are not so much 'en vogue' anymore these days since everyone uses DSP but I believe LTC and National still offer these chips. In case this is for series production you'd have to make sure the chips stay around for a while though.

That gets you around most of the large capacitor tolerance issues.

Regards, Joerg

http://www.analogconsultants.com