一种应用开关电容分压的电源电压检测电路  

A Voltage Detector with Switched-Capacitor Voltage Dividing

作　　者：徐一 马永旺[1,2] 何洋 王小曼 胡毅 唐晓柯 张海峰 赵东艳 XU Yi;MA Yongwang;HE Yang;WANG Xiaoman;HU Yi;TANG Xiaoke;ZHANG Haifeng;ZHAO Dongyan(State Grid Key Laboratory of Power Industrial Chip Design and Analysis Technology,Beijing Smart-Chip Microelectronics Technology Co,Ltd, Beijing 100192,China;Beijing Engineering Research Center of High-reliability IC with Power Industrial Grade, Beijing Smart-Chip Microelectronics Technology Co,Ltd,Beijing 100192,China)

机构地区：[1]北京智芯微电子科技有限公司,国家电网公司重点实验室,电力芯片设计分析实验室,北京100192 [2]北京智芯微电子科技有限公司,北京市电力高可靠性集成电路设计工程技术研究中心,北京100192 [3]哈尔滨工业大学 [4]清华大学

出　　处：《电子器件》2018年第4期924-927,共4页Chinese Journal of Electron Devices

摘　　要：提出了一种基于标准CMOS工艺的电压检测VD(Voltage Detector)电路,具有高集成度、低功耗、检测点多档位可调节的特点。开关电容SC(Switched Capacitor)电路仅需一个低频时钟即可提供准确的电源分压,在低功耗应用中可以有效替代传统电阻分压。在3.3 V电源电压的MCU应用中,电压检测电路仅消耗几百n A的电流,对时钟变化不敏感(低频时钟频率变化范围4 k Hz^40 k Hz),并且响应时间在一个时钟周期内。We propose a voltage detect circuit on TSMC 180nm standard CMOS process.The voltage detector(VD)is highly integrated,ultra-low power and configurable threshold voltage.Switch capacitor(SC)circuit is used to provide a highly accurate divider of the voltage under test.The SC divider only consumers several hundreds of nA current in the MCU application of 3.3 V supply voltage.It also has the advantage of insensiveness to switch frequency which varies from 4 kHz to 40 kHz,and can fast response of voltage variation in less than one clock cycle.

关 键 词：开关电容 电压检测 低功耗 欠压锁定 高集成度 

分 类 号：TN432[电子电信—微电子学与固体电子学]