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Low pass filter in the house!!!
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Low pass filter in the house!!!

petermfleming posted on 09 Mar 2011 1:22 PM PST
Member
2 Forum Posts

 Im trying to design an analogue low pass filter , does anyone have any help, ie: sample projects or any info at all, cheers.




Re: Low pass filter in the house!!!

Robert-CY posted on 10 Mar 2011 10:37 PM PST
Cypress Employee
129 Forum Posts

For all I know you need external caps. There is a brand new knowledgebase article about this subject.

http://www.cypress.com/?id=4&rID=38571

Check it out, should be pretty close to your question.

Cheers, Robert



Re: Low pass filter in the house!!!

seg posted on 10 Mar 2011 03:39 PM PST
Cypress Employee
8 Forum Posts

EVERY opamp supplier has a set of filter design tools.

EVERY graduate student interested in analog design has written a set of filter design tools.

My favorite, and the one I use because I don't feel like re-writing one of the dozen versions that I've done before, is:

http://sim.okawa-denshi.jp/en/Fkeisan.htm

I particularly like the 3 pole Sallen+Key implementation.

Just use the PSoC opamp as the opamp in the schematics in the design tool. Component selection in PSoC Creator, then pin assignment, then one line of start code, add external R+Cs . . . . and your filter is complete.

---- Dennis






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