A Novel Bandgap Reference for Minimizing Current-Mirror Mismatch
A novel bandgap reference for minimizing current-mirror mismatch is presented. In the proposed circuit,the small-signal current variations in the two current paths are self-compensated while in the conventional bandgap core they are multiplied. As a result,error caused by current-mirror mismatch has been much reduced in the proposed circuit. Moreover,the voltage variations caused by temperature and supply voltage changes which make the small-signal current in the bandgap core vary can also be minimized. Based on the 0.6um BiCMOS process technology,the error caused by current-mirror mismatch has been reduced by about 50 times in the proposed bandgap core and the complete circuit achieves a low temperature coefficient of 2.3 ppm/℃ and a high power supply rejection ratio (PSRR) of 72db without any PSRR boosting technique. On typical working conditions,the proposed circuit consumes only a supply current of 3.6uA.
Li Sizhen Zou Xuecheng Yu Kai Zhang Hao LIN Shuangxi
Department of Electronic Science & Technology,Huazhong University of Science & Technology,Wuhan 4300 School of Electric and Information Engineering,Wuhan Institute of Technology,Wuhan 430073,China
国际会议
9th International Conference on Solid-State and Integrated-Circuit Technology(第9届固态和集成电路国际会议)
北京
英文
1781-1784
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）