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应用于Sigma-Delta ADC中的高性能前置放大器
Design of a high performance pre-amplifier for Sigma-Delta ADC
投稿时间:2016-09-29  修订日期:2017-01-16
中文关键词:斩波技术  AB类推挽技术  折叠式共源共栅运放
英文关键词:chopper technique  class-AB push-pull  folded-cascode amplifier
基金项目:中国国家自然科学基金资助项目(61274043,1233010);湖南省自然科学杰出青年基金资助项目(2015JJ1014)
作者单位
陆序长 1.School of Physics and OptoelectronicsXiangtan UniversityXiangtan Hunan 411105China2.Optoelectronics and System on A ChipHunan Engineering Laboratory for MicroelectronicsXiangtan UniversityXiangtan Hunan 411105China 
张虎龙 Seal Factory R & D DepartmentBYD Auto Co.,LtdShenzhen Guangdong 518116China 
谢 亮 1.School of Physics and OptoelectronicsXiangtan UniversityXiangtan Hunan 411105China2.Optoelectronics and System on A ChipHunan Engineering Laboratory for MicroelectronicsXiangtan UniversityXiangtan Hunan 411105China 
金湘亮 1.School of Physics and OptoelectronicsXiangtan UniversityXiangtan Hunan 411105China2.Optoelectronics and System on A ChipHunan Engineering Laboratory for MicroelectronicsXiangtan UniversityXiangtan Hunan 411105China 
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中文摘要:
      设计了一种高性能的全差分型折叠式共源共栅放大器。一方面,电路中使用了斩波技术和AB类推挽技术,以提高放大器的精确度和动态性能;另一方面,放大器中的电流源采用自级联结构,可以进一步提高电路的电压裕度和鲁棒性。本电路基于华润上华CMOS 0.35 μm工艺实现,版图面积为640 μm×280 μm,Spectre后仿真结果表明,在电源电压为5 V且斩波频率为156.25 kHz的情况下,等效输入噪声为1.11 nV/Hz1/2,失调电压为61.5 μV,功耗为1.22 mW。
英文摘要:
      A high performance fully differential folded-cascode amplifier is designed. On the one hand, in order to improve the amplifier’s precision and dynamic performance, the chopper and class-AB push-pull technique are applied in the circuit; on the other hand, to further improve the voltage margin and robustness in the circuit, the self-cascode current source is applied in the amplifier. The circuit is realized based on the CSMC 0.35 μm CMOS technique, and the layout area is about 640 μm×280 μm. The simulation results show: at a power supply of 5 V and the chopping frequency of 156.25 kHz, the equivalent input noise is 1.11 nV/Hz1/2, the offset voltage is 61.5 μV and the power consumption is 1.22 mW.
引用本文:陆序长,张虎龙,谢 亮,金湘亮.应用于Sigma-Delta ADC中的高性能前置放大器[J].太赫兹科学与电子信息学报,2018,16(3):547~551
DOI:10.11805/TKYDA201803.0547
学科分类代码:
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