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 0.35μm工艺实现,版图面积为640μm×280μm,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 n V/Hz^(1/2),失调电压为61.5μV,功耗为1.22 mW。
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 n V/Hz(1/2), the offset voltage is 61.5 μV and the power consumption is 1.22 mW.
作者
陆序长
张虎龙
谢亮
金湘亮
LU Xuchang;ZHANG Hulong;XIE Liang;JIN Xiangliang(School of Physics and Optoelectronics,Xiangtan University,Xiangtan Hunan 411105,China;Optoelectronics and System on A Chip,Hunan Engineering Laboratory for Microelectronics,Xiangtan University,Xiangtan Hunan 411105,China;Seal Factory R & D Department,BYD Auto Co.,Ltd,Shenzhen Guangdong 518116,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2018年第3期547-551,共5页
Journal of Terahertz Science and Electronic Information Technology
基金
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)