A 345 µW Multi-Sensor Biomedical SoC With Bio-Impedance, 3-Channel ECG, Motion Artifact Reduction, and Integrated DSP

Author

Van Helleputte, Nick ; Konijnenburg, Mario ; Pettine, Julia ; Dong-Woo Jee ; Hyejung Kim ; Morgado, Alonso ; Van Wegberg, Roland ; Torfs, Tom ; Mohan, Rachit ; Breeschoten, Arjan ; de Groot, Harmke ; Van Hoof, Chris ; Yazicioglu, Refet Firat

Author_Institution

imec, Heverlee, Belgium

Volume

50

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

230

Lastpage

244

Abstract

This paper presents a MUlti-SEnsor biomedical IC (MUSEIC). It features a high-performance, low-power analog front-end (AFE) and fully integrated DSP. The AFE has three biopotential readouts, one bio-impedance readout, and support for general-purpose analog sensors The biopotential readout channels can handle large differential electrode offsets ( ±400 mV), achieve high input impedance ( >500 M Ω), low noise ( 620 nVrms in 150 Hz), and large CMRR ( >110 dB) without relying on trimming while consuming only 31 μW/channel. In addition, fully integrated real-time motion artifact reduction, based on simultaneous electrode-tissue impedance measurement, with feedback to the analog domain is supported. The bio-impedance readout with pseudo-sine current generator achieves a resolution of 9.8 m Ω/ √Hz while consuming just 58 μW/channel. The DSP has a general purpose ARM Cortex M0 processor and an HW accelerator optimized for energy-efficient execution of various biomedical signal processing algorithms achieving 10 × or more energy savings in vector multiply-accumulate executions.

Keywords

biological tissues; biomedical electronics; biomedical equipment; electric impedance measurement; electrocardiography; low-power electronics; medical signal processing; motion compensation; noise; signal resolution; 3-channel ECG; CMRR; HW accelerator optimization; MUSEIC; MUlti-SEnsor biomedical IC; analog domain feedback; bio-impedance readout; biomedical signal processing algorithm; biopotential readout channel; differential electrode offset; energy saving; energy-efficient execution; frequency 150 Hz; fully integrated DSP; fully integrated motion artifact reduction; general purpose ARM Cortex M0 processor; general-purpose analog sensor support; high-performance analog front-end; input impedance; low-power AFE; multi-sensor biomedical SoC; noise; power 31 muW; power 345 muW; power 58 muW; pseudo-sine current generator; real-time motion artifact reduction; resolution; simultaneous electrode-tissue impedance measurement; vector multiply-accumulate execution; Electrocardiography; Electrodes; Generators; Impedance; Noise; Sensors; System-on-chip; DSP; ECG; bio-impedance; biomedical; instrumentation amplifier; motion artifact reduction;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2014.2359962

Filename

6923499