The power-efficient biomedical acquisition system by variable-resolution sigma-delta modulator

Chen-Ming Hsu; Wei-Song Wang; Ching Hsing Luo

doi:10.1109/IEMBS.2007.4352998

The power-efficient biomedical acquisition system by variable-resolution sigma-delta modulator

Annu Int Conf IEEE Eng Med Biol Soc. 2007:2007:3152-5. doi: 10.1109/IEMBS.2007.4352998.

Authors

Chen-Ming Hsu¹, Wei-Song Wang, Ching Hsing Luo

Affiliation

¹ Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan, 701.

PMID: 18002664
DOI: 10.1109/IEMBS.2007.4352998

Abstract

A novel biomedical acquisition system which can adjust its resolution by the condition of signal is presented in this paper. The resolution of sigma-delta modulator in proposed system can be automatically varied by switching its architecture and sampling rate that can acquire accurate date without additional power consumption. The modulator in this system reaches specifications from 10-bit to 16-bit resolution and consumes power from 48microW to 360microW. In the electrocardiogram and electroculogram acquisition by proposed system, it can save more than 40% and 73% power consumption comparing with the conventional acquisition system.

Publication types

Evaluation Study

MeSH terms

Amplifiers, Electronic*
Analog-Digital Conversion*
Biomedical Engineering / instrumentation
Data Compression / methods*
Electric Power Supplies*
Equipment Design
Equipment Failure Analysis
Monitoring, Ambulatory / instrumentation*
Monitoring, Ambulatory / methods
Reproducibility of Results
Sensitivity and Specificity
Signal Processing, Computer-Assisted / instrumentation*