Operational amplifier sharing based high-pass sigma-delta modulator with programmable feed-forward coefficients for ECG signal acquisition

Po Han Su, Kuan Lin Huang, Shuenn Yuh Lee

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

A high-pass sigma-delta modulator (HPSDM) that uses operational amplifier (op-amp) sharing and programmable feed-forward coefficients is presented for an electrocardiography (ECG) signal detection system. Op-amp sharing is used to reduce the quantity of amplifiers because they dominate the entire power consumption of the HPSDM. Moreover, the amplitude of the ECG varies from person to person; hence, programmable feed-forward coefficients are used to adjust the dynamic range of HPSDM to obtain high resolution across users. This technique is implemented using the 0.18 μm standard CMOS process. Measurement results reveal that the proposed HPSDM has a signal-to-noise and distortion (SNDR) of 54.5 dB and a power of 2.25 μW under a 1.2 V supply voltage to achieve the figure of merit of 12.96 pJ/conv. In terms of other settings, the proposed HPSDM has an SNDR of 64.8 dB and a power of 5.2 μW under a 1.8 V supply voltage to achieve the figure of merit of 9.15 pJ/conv. Both modes extend the dynamic range of 12 dB according to the programmable feed-forward coefficients.

原文English
主出版物標題2020 IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Proceedings
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781728133201
出版狀態Published - 2020
事件52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Virtual, Online
持續時間: 2020 10月 102020 10月 21

出版系列

名字Proceedings - IEEE International Symposium on Circuits and Systems
2020-October
ISSN(列印)0271-4310

Conference

Conference52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020
城市Virtual, Online
期間20-10-1020-10-21

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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