polus Posted November 13, 2006 Report Share Posted November 13, 2006 Im building a interface board which will be operating in a noisey enviroment and so, would like to filter the input. Ive read about PI filters but am not sure exactly how to calculate the values required.Theres a diagram here:http://www.tpub.com/content/neets/14178/css/14178_164.htmAre they known by another name becuase I cant find much in the search engines?Thanks. Quote Link to comment Share on other sites More sharing options...
audioguru Posted November 13, 2006 Report Share Posted November 13, 2006 Hi Polis,I think a pi filter has two capacitors and an inductor between them. Your circuit is an LC lowpass filter.I searched Google for LC Power Supply Filter and got many links. This one shows that the LC filter must have the proper load or it will be resonant: Quote Link to comment Share on other sites More sharing options...
polus Posted November 13, 2006 Author Report Share Posted November 13, 2006 Thanks Audiguru.Ill have a look :) Quote Link to comment Share on other sites More sharing options...
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