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摘要：
本文介绍了基于 CSMC 0.5μm CMOS 工艺的仪表放大器电路设计，该仪表放大器是心电信号放大电路的重要组成部分。本文设计的仪表放大器电路结构在前人的基础上进行了细微的改进，减少了专门给补偿电路提供电压偏置的 9 个 MOS 管，并保持原有的功能和指标不变。仿真结果表明，本文介绍的仪表放大器可通过片外电阻调节增益，放大倍数为 14 倍时，3dB 带宽为 380kHz，共模输入范围为-1.4V 至 1.4V，共模抑制比和电源抑制比均远大于 100dB。
关键词：集成电路设计；仪表放大器；心电信号放大
ECG AMPLIFIER DESIGN
TANG Wankai, WANG Zhigong, XU Jian, TANG Lu
(Engineering Research Centre of RF-ICs & RF-systems, Ministry of Education of China,Southeast University, Nanjing 210096, China)
Abstract :
This paper describes the instrumentation amplifier circuit design based on the CSMC 0.5μm CMOS technology. The instrumentation amplifier is a important component of ECG amplifier circuit. The circuit structure in this paper has been improved slightly on the basis of the others’ previous work.The voltage bias which consists of nine MOS tubes for compensation circuit is reduced while original features and indicators do not change.The simulation shows that: this instrumentation amplifier can adjust its gain by the out-chip resistance and 3dB bandwidth is 380kHz when magnification is 14. Its common-mode input range is -1.4V to 1.4V. CMRR and PSRR is larger than 100dB.
Key words: IC design; instrument amplifier; ECG |
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发表于 2016-2-22 10:35:43
