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An Introduction to Filters
4/1/2013

A basic RC low-pass filter (top), an RC filter with an op-amp buffer (middle), and a Sallen-Key low-pass filter (bottom).
A basic RC low-pass filter (top), an RC filter with an op-amp buffer (middle),
and a Sallen-Key low-pass filter (bottom).

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Cabe Atwell
User Rank
Blogger
Re: Better Components
Cabe Atwell   4/2/2013 11:40:34 PM
NO RATINGS
I love the online calculators and designer for electronics. Build upon the shoulders of those who came before us, don't "discover" filters on your own.

C

tekochip
User Rank
Platinum
Better Components
tekochip   4/1/2013 11:20:32 PM
NO RATINGS
Thanks Jon, it was fun to see that the reference for the article was a Sams book from 1977. Back then one of the toughest design issues was how expensive, or difficult it was to obtain precision capacitor values. We use the same circuits today and don't think twice about buying 5% capacitors.


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