I also tried putting the signal through a buffering op amp and that doesn't seem to help. For some reason, the A/D input of the PIC does not like the signal coming from output of the buffer, nor does it like the input of our sample and hold circuitry, nor the signal coming directly from the CCD. So we tried to amplify the signal before buffering it and the output just becomes noisy as hell with or without the PIC connected.

HELP!