一种低功耗低噪声仪表放大器的设计

发布时间：2018-03-03 13:44

本文选题：低功耗　切入点：低噪声　出处：《微电子学》2017年05期 　论文类型：期刊论文

【摘要】：基于SMIC 0.18μm CMOS工艺,设计了一种用于电生理信号监测的低功耗、低噪声仪表放大器。采用两级放大结构和斩波技术,减小了低频闪烁噪声。引入波纹抑制负反馈环路,减小了斩波带来的波纹噪声。采用积分负反馈直流失调抑制(DCOC)环路,减小了电路的失调。采用自举技术,增大了电路的输入阻抗。该电路的功耗仅为600nW,带内(0.5~500Hz)噪声小于200nV/Hz~(1/2),CMRR大于105dB,输入阻抗大于500 MΩ。
[Abstract]:Based on SMIC 0.18 渭 m CMOS process, a low power and low noise instrument amplifier for electrophysiological signal monitoring is designed. The low frequency scintillation noise is reduced by using two stage amplifier structure and chopping technique, and the corrugated suppression negative feedback loop is introduced. The ripple noise caused by chopping wave is reduced, the DC offset of DCOC loop is suppressed by integrating negative feedback, and the circuit misalignment is reduced. The bootstrap technique is used. The input impedance of the circuit is increased, the power consumption of the circuit is only 600nW, and the in-band noise is less than 200nV / Hz / 2 / 2 CMRR > 105dB, and the input impedance is more than 500M 惟.
【作者单位】：中国科学院微电子研究所健康电子研发中心;中国科学院微电子研究所新一代通信射频芯片技术北京市重点实验室;中国科学院大学未来技术学院;
【分类号】：TN722

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