Hello folks. I'm looking for a solution to this problem: I have 5v supply (single rail, DC) and I want REALLY CLEAN +/-12v @ 50mA. Consider that conversion should not generate noise in 50 KHz+ Band AT ALL!!! Any Idea? Any experience in low freq switching big capacitors? Thanks in advance. Ale -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads