A 30 $\mu$W Analog Signal Processor ASIC for Portable Biopotential Signal Monitoring
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- 9 November 2010
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 46 (1), 209-223
- https://doi.org/10.1109/jssc.2010.2085930
Abstract
This paper presents the design and implementation of an analog signal processor (ASP) ASIC for portable ECG monitoring systems. The ASP ASIC performs four major functionalities: 1) ECG signal extraction with high resolution, 2) ECG signal feature extraction, 3) adaptive sampling ADC for the compression of ECG signals, 4) continuous-time electrode-tissue impedance monitoring for signal integrity monitoring. These functionalities enable the development of wireless ECG monitoring systems that have significantly lower power consumption yet that are more capable than their predecessors. The ASP has been implemented in 0.5 μm CMOS process and consumes 30 μW from a 2 V supply. The noise density of the ECG readout channel is 85 nV/√Hz and the CMRR is better that 105 dB. The adaptive sampling ADC is capable of compressing the ECG data by a factor of 7 and the heterodyne chopper readout extracts the features of the ECG signals. Combination of these two features leads to a factor 4 reduction in the power consumption of a wireless ECG monitoring system. Furthermore, the proposed continuous-time impedance monitoring circuit enables the monitoring of the signal integrity.Keywords
This publication has 26 references indexed in Scilit:
- A 200 μW Eight-Channel EEG Acquisition ASIC for Ambulatory EEG SystemsIEEE Journal of Solid-State Circuits, 2008
- A 5 $\mu$W/Channel Spectral Analysis IC for Chronic Bidirectional Brain–Machine InterfacesIEEE Journal of Solid-State Circuits, 2008
- A 2 $\mu\hbox{W}$ 100 nV/rtHz Chopper-Stabilized Instrumentation Amplifier for Chronic Measurement of Neural Field PotentialsIEEE Journal of Solid-State Circuits, 2007
- A 60 $\mu$W 60 nV/$\surd$Hz Readout Front-End for Portable Biopotential Acquisition SystemsIEEE Journal of Solid-State Circuits, 2007
- A low-power low-noise cmos for amplifier neural recording applicationsIEEE Journal of Solid-State Circuits, 2003
- 12-bit low-power fully differential switched capacitor noncalibrating successive approximation ADC with 1 MS/sIEEE Journal of Solid-State Circuits, 2001
- A level-crossing sampling scheme for A/D conversionIEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 1996
- New monolithic switched-capacitor differentiators with good noise rejectionIEEE Journal of Solid-State Circuits, 1989
- A micropower low-noise monolithic instrumentation amplifier for medical purposesIEEE Journal of Solid-State Circuits, 1987
- A CMOS chopper amplifierIEEE Journal of Solid-State Circuits, 1987