I'm using an ECS-2100 4MHz clock oscillator in a circuit to provide a clock to a MAX155 ADC. I'm getting lots of interference in the power and ground lines on the board at the same frequency up to 2.2V swings, it's definitely affecting my ADC readings and I'd like to see what I can do to stop it. Things I've tried: 1) Low-pass filter 2) Big ole' capacitor 3) A diode circuit in the datasheet Nothing seems to do a damn thing and I'm running out of ideas. Thanks. :) Nick Veys / nick@veys.com / www.veys.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads