Suppose that it is desired to have a noise floor of 100 µV RMS in a CMOS imager. Further suppose that the sensing circuit doesn't contribute any noise to the sense (the transformation from the analog...

Suppose that it is desired to have a noise floor of 100 µV RMS in a CMOS imager. Further suppose that the sensing circuit doesn't contribute any noise to the sense (the transformation from the analog column voltage to a digital word). Estimate the size of the hold capacitors used to sample both the reference and the intensity signals.