An Ultra Low Steady-State Current Power-on-Reset Circuit in 65nm CMOS Technology  

作　　者：SHAN Weiwei WANG Xuexiang LIU Xinning SUN Huafang 

机构地区：[1]National ASIC System Engineering Research Center, Southeast University

出　　处：《Chinese Journal of Electronics》2014年第4期678-681,共4页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61006029)and Qing Lan Project

摘　　要：A novel Power-on-reset （POR） circuit is proposed with ultra-low steady-state current consumption. A band=gap voltage eomparator is used to generate a stable pull-up voltage. To eliminate the large current consumptions of the analog part, a power switch is adopted to cut the supply of band-gap voltage comparator, which gained ultra-low current consumption in steady-state after the POR rest process completed. The state of POR circuit is maintained through a state latch circuit. The whole cir- cuit was designed and implemented in 65rim C1V[OS tech- nology with an active area of 120ttm＊160~m. Experimental results show that it has a steady pull=up voltage of 0.69V and a brown-out voltage of 0.49V under a 1.2V supply voltage rising from 0V, plus its steady-state current is only 9hA. The proposed circuit is suitable to be integrated in system on chip to provide a reliable POR signal.A novel Power-on-reset(POR) circuit is proposed with ultra-low steady-state current consumption. A band-gap voltage comparator is used to generate a stable pull-up voltage. To eliminate the large current consumptions of the analog part, a power switch is adopted to cut the supply of band-gap voltage comparator, which gained ultra-low current consumption in steady-state after the POR rest process completed. The state of POR circuit is maintained through a state latch circuit. The whole circuit was designed and implemented in 65 nm CMOS technology with an active area of 120μm*160μm. Experimental results show that it has a steady pull-up voltage of 0.69 V and a brown-out voltage of 0.49 V under a 1.2V supply voltage rising from 0V, plus its steady-state current is only9 n A. The proposed circuit is suitable to be integrated in system on chip to provide a reliable POR signal.

关 键 词：Power-on-reset circuit Brown-out detection Ultra-low steady-state current Band-gap voltage comparator. 

分 类 号：TN402[电子电信—微电子学与固体电子学]