A novel CC-II based current comparator and its application as current mode flash ADC

In this paper, a new design for current comparator based on Current Conveyor-II (CC-II) is proposed. The proposed current comparator utilizes the concept of positive feedback. Simulations have been performed on Pspice using 0.18um CMOS technology with 1.8V supply. Final results confirm a fairly quick response, less power dissipation and a resolution of 4.4uA for the current comparator. A 2-bit current mode flash ADC is designed using the proposed comparator.