What kind of capacitor and size would you consider suitable? Regards, Gordon Williams ----- Original Message ----- From: "Jinx" To: "Microcontroller discussion list - Public." Sent: Thursday, December 07, 2006 8:06 PM Subject: Re: [PIC] ADC voltage mismatch problem > > There's an implied assumption that VCC is a stable voltage. > > I've never tried (for example) VCC as a sine wave added to an > > offset so that it was always inside the limits, but varying > > If ripple is a problem, stop the Vcc boost immediately before sampling > and there'll be no noise on Vcc. With a ** suitable ** reservoir cap > and low enough Ivcc (SLEEP the PIC for an ADC reading ?), Vcc > should hold up for the acquisition. I'd be quite confident though that > noise can be filtered to an app-dependent ** acceptable ** level > without going to a lot of software/firmware bother > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist