黑龙江科技学院学报2011，Vol.21Issue(5)：404-407,4.
双斜率积分ADC中开关电容积分器的设计
Design of switched capacitor integrator used in dual-slope integrator
张鹏南 1杨庆江 1夏洪洋1
作者信息
- 1. 黑龙江科技学院电气与信息工程学院,哈尔滨150027
- 折叠
摘要
Abstract
Aimed at improving the accuracy of the analog-digital conversion in dual-slope ADCs,this paper introduces a high-performance switched-capacitor integrator to replace the conventional active RC integrator.The operation amplifier in this switched-capacitor integrator is composed of a folded cascade input stage and a Class AB output stage and CMOS switches are utilized to suppress charge injection and clock feed-through effects.The simulation of all the circuit modules by EDA simulation software,depending on SMIC 0.18 μm CMOS process,shows that the operation amplifier is capable of a DC gain of 110.3 dB,a unity gain bandwidth of 5.64 MHz,a phase margin of 79°,an output swing of 0.013 3-3 299 mV,and a slew rate of 7.56 MV/s.The switched-capacitor integrator proves quite suitable for the practical applications in the dual-slope ADCs.关键词
双斜率积分ADC/开关电容积分器/折叠共源共栅Key words
dual-slope integration AD converter/switched capacitor integrator/folded cascode分类
信息技术与安全科学引用本文复制引用
张鹏南,杨庆江,夏洪洋..双斜率积分ADC中开关电容积分器的设计[J].黑龙江科技学院学报,2011,21(5):404-407,4.
