Design Optimization of a Low-Power and Low-Complexity Digital Driven-Right-Leg Circuit for Active-Electrode Measurement Systems

IF 5.6 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI:10.1109/TIM.2025.3554913

Techapon Songthawornpong;Woradorn Wattanapanitch

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引用次数: 0

Abstract

This article presents a methodology for optimizing the design of a digital driven-right-leg (DRL) circuit for use in improving the common-mode rejection ratio (CMRR) of multichannel active-electrode (AE) biopotential measurement systems operating with dry electrodes. Taking into consideration important design aspects including stability and performance, the proposed methodology aims to maximize the system’s CMRR while minimizing the DRL circuit’s complexity and power consumption. Our design methodology is validated through an ECG measurement system implemented with discrete components. Measured results show that, even with low-resolution data converters, the digital DRL circuit can help boost the overall CMRR by 77.6 dB. With only 6 bits of resolutions for its data converters operating from a full-scale range of 3.3 V, the proposed DRL circuit enables an AE pair, with a poor intrinsic CMRR of 38.26 dB and without the help of any notch filtering, to acquire ECG from dry electrodes with unnoticeable powerline interference.

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来源期刊

IEEE Transactions on Instrumentation and Measurement 工程技术-工程：电子与电气

CiteScore

9.00

自引率

23.20%

发文量

1294

审稿时长

3.9 months

期刊介绍： Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.