An offset-insensitive switched-capacitor bandgap reference with continuous output

作     者：郑鹏 严伟 张科 李文宏 

作者机构：State Key Laboratory of ASIC & SystemFudan University 

出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)

年 卷 期：2009年第30卷第8期

页      面：132-135页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(No.60676013) 

主　　题：bandgap reference switched-capacitor offset self-bias continuous output 

摘      要：An improved switched-capacitor bandgap reference with a continuous output voltage of 1.26 V has been implemented with Chartered 0.35-μm 5-V CMOS process. The output offset voltage, induced by non-ideal characteristics of operational amplifier and bias current generator, is suppressed by the proposed sample-and-hold circuit and self-bias technique. Experimental results show that the proposed circuit operates properly under a supply voltage varying from 3 to 5 V. The measured temperature coefficient is 112 ppm/℃ and the power supply rejection ratio of output voltage without any filtering capacitor is -40 dB and -33 dB at 100 Hz and 10 MHz, respectively.