Error neutralised switched-current comparator

This paper describes an error-neutralised switched-current comparator, which makes use of cross-coupled capacitors to compensate conductance errors resulting from both the overlap capacitances and the channel length modulation effect in the comparator´s memory stage. The technique provides improved resolution with virtually no penalty on speed and power dissipation. Monte-Carlo simulations indicate a reliable resolution of over 8.5-bits with an improvement of more than 2.5-bits over that of the basic compensated SI comparator, at a comparison rate of over 100 MHz and power consumption of less than 0.85 mW