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432 nW per Channel 130 nV/rtHz ECG Acquisition Front End with Multifrequency Chopping
Published in Institute of Electrical and Electronics Engineers Inc.
2019
Volume: 27
   
Issue: 9
Pages: 2021 - 2032
Abstract
An ultralow-power low-noise analog front end (AFE) for ECG signal acquisition is demonstrated. The key to its performance is a multifrequency chopping technique that helps to significantly reduce power consumption by frequency-division multiplexing of two channels in a single low-noise instrumentation amplifier (IA). A complete two-channel AFE, chopped at frequencies of 4 and 8 kHz, is implemented in a 0.13-μm CMOS technology from United Microelectronics Corporation. A current-reuse technique is employed in the first stage of the IA to achieve area savings and improve interchannel isolation. Experimental results show that the front end achieves an input-referred noise voltage density of 130 nV/rtHz while consuming current of 360 nA per channel from a 1.2-V power supply. The 1/f noise corner of the system is around 10 Hz, and the measured common-mode rejection ratio (CMRR) is 98 dB. © 2019 IEEE.
About the journal
JournalData powered by TypesetIEEE Transactions on Very Large Scale Integration (VLSI) Systems
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN10638210
Open AccessNo
Concepts (12)
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    Electrocardiography
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    Mergers and acquisitions
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    Microelectronics
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    1/F NOISE CORNERS
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    ANALOG FRONT END
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    Common mode rejection ratio
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    Current reuse
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    ECG SIGNAL ACQUISITIONS
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    Instrumentation amplifier
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    Multi frequency
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    NOISE EFFICIENCY FACTORS
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    Signal processing