A 26-GΩ Input-Impedance 112-dB Dynamic-Range Two-Step Direct-Conversion Front-End With Improved Δ-Modulation for Wearable Biopotential Acquisition

被引：1

作者：

Hao, Yuzhi ^{[1
,2
]}

Fan, Hua ^{[3
,4
]}

Lian, Yong ^{[5
]}

Chen, Mingyi ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Natl Key Lab Adv Micro & Nano Manufacture Technol, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Dept Micro Nano Elect, Shanghai 200240, Peoples R China

[3] Univ Elect Sci & Technol China, Shenzhen Inst Adv Study, Shenzhen 518000, Peoples R China

[4] Univ Elect Sci & Technologyof China, Exemplary Sch Microelect, Sch Integrated Circuit Sci & Engn, Chengdu 611731, Peoples R China

[5] York Univ, Dept EECS, Toronto, ON M3J 1P3, Canada

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2024年

基金：

中国国家自然科学基金;

关键词：

Artifact-tolerant; bio-potential acquisition; direct conversion front-end (Direct-FE); dynamic range (DR); input impedance; wearable; INSTRUMENTATION AMPLIFIER; EFFICIENT; CMOS; MULTISENSOR; MISMATCH; CORNER; SOC; DAC; ECG;

D O I：

10.1109/JSSC.2024.3514745

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article presents a high dynamic range (DR) direct conversion front-end (Direct-FE) IC enabling the wearable acquisition of weak bio-potentials superposed onto large motion artifacts (MAs). The prototype IC has been fabricated in a standard 0.18-mu m CMOS process. Benefiting from the proposed feedback (FB) two-step direct conversion architecture with an improved A-modulation, as well as a novel differential difference amplifier (DDA) and a dynamic-element-matching (DEM) technique, it achieves a peak input range of 3.56 V-pp, an input- referred noise (IRN) of 2.2 mu V-rms, an input impedance of 26 G Omega, and a +/- 1.8-V electrode de offset (EDO) tolerance, while consuming only 63-mu W power. Compared with state-of-the-art Direct FEs, the proposed work demonstrates an advanced DR (112 dB) and a competitive FOMDR (175 dB). The prototype IC has been validated based on in vivo experiments, demonstrating its capability for artifact-tolerant wearable bio-potential acquisition.

引用

页数：15

共 1 条

[1] A 115.2-dB Dynamic-Range Two-Step Direct-Conversion Front-End With Mismatch Error Shaping for Noninvasive Biomedical Devices
Chen, Yuxuan
Yang, Xianzhi
Lin, Jiayi
Liu, Zilong
Zeng, Min
Wu, Qi
Chen, Mingyi
IEEE SOLID-STATE CIRCUITS LETTERS, 2025, 8 : 69 - 72

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