Circuit Design of Hysteresis Comparator with Band-Gap Structure
Xu Jing-Ping · 2011
Considering that the traditional band-gap hysteresis comparator's input voltage can not be lower than 2V,and the chip's area is very large,to meet the demands of low voltage and micro power,a hysteresis comparator with band-gap structure circuit is designed,whose chip static electric can be low to 40uA only.The circuit is completed with Hspice software based on Biploar process.Simulation results show that,the efficiency is up to 85% by different supply powers,the hysteresis voltage is 8mV,and the voltage over the limit is small when the input voltage or the temperature changes.