Novel High-Performance CMOS Current Comparator Circuit
Bing Shi · 2001
The advantages and disadvantages of existing high performance continuous time CMOS current comparators are analyzed,and a novel CMOS current comparator is proposed It comprises one CMOS complementary amplifier with negative resistance feedback,two resistive load amplifiers and two CMOS inverters Because the input and output resistance of the CMOS complementary amplifier decreases owing to the negative feedback resistor,the voltage swings are reduced,and the response time of the current comparator is short and the speed is fast The power consumption of the current comparator has decreased by using the resistive load amplifiers Simulation results based on 1 2μm CMOS technology HSPICE model show the response time of the novel current comparator is comparable with those of the existing fastest CMOS current comparators,while its power consumption is the lowest,so its speed/power ratio is the best Furthermore,due to the simple circuit structure of the novel current comparator and its perfect,performance of deviations,it is very suitable for the high speed/low power current mode integrated circuits