this multi - flash analog - to - digital converter , in particular dual flash adc , has extremely high speed and resolution . the final resolution of a comparator / multiplexer section can be effectively doubled . for instance , a 16 - bit adc can employ 300 rather than 255 comparators . a monolithic integration can be accomplished . a resistive network is coupled to a reference source for providing a plurality of reference signals . a comparator / multiplexer section compares a comparison signal against the reference signals , selects one of the reference signals and produces a code . a capacitor circuit provides the comparison signal in response to the adc input signal and subsequently in response to a signal difference between the stored adc input signal and selected reference signal . two codes are encoded and converted into the output code of the adc .