Try this one: http://www.microchip.com/1010/pline/tools/analog/software/flab/index.htm perhaps is all you need. VV >Carlos Marcano wrote: >Hi guys, >I was wondering if any of you know about a software for >designing low-pass filters using opamps... Any ideas? --------------------------------- Do you Yahoo!? The New Yahoo! Shopping - with improved product search -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads