一种高CMRR高增益运算放大器的设计  

Design of a High CMRR High Gain Operational Amplifier

作　　者：何泽炜 郭俊[1] 张国俊[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《微电子学》2015年第4期457-460,共4页Microelectronics

摘　　要：设计了一种基于TSMC 0.5μm工艺的高共模抑制比、高增益运算放大器。针对该运放的结构,提出了相应的频率补偿方法,使得电路具有较好的稳定性。该运放可用于生物电势信号检测等对共模抑制比要求较高的场合。仿真结果表明,电路的共模抑制比高达137dB,低频增益为117dB,单位增益带宽为6.36 MHz,功耗仅为227μW。A high CMRR high gain operational amplifier based on TSMC 0.5 μm process was presented. A frequency compensation method for this op amp was proposed to ensure the phase margin. The op amp could be used for high CMRR demanding applications, such as signal detection of bio-potential. Simulation results showed that the CMRR of the circuit was 137 dB, the gain（@ dc） was 117 dB, the unity gain bandwidth was 6.36 MHz, but the power dissipation was only 227 μW.

关 键 词：高共模抑制比 高增益 运算放大器 频率补偿 

分 类 号：TN432[电子电信—微电子学与固体电子学]