> I suppose you cannot run a 10 bit A/D and divide the result by 2 as the > obvious first hit to get rid of +/-1 LSB jitter. No. Consider the case 1999 and 2000. Divided by two it is 999 and 1000. The last digit is still jumping. Peter -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads