Sun K Yoo et al 2002 Physiol. Meas. 23 469 doi:10.1088/0967-3334/23/2/320
Improvement of multi-channel isolated bio-potential amplifiers using multiplexing
Sun K Yoo1, Nam H Kim1 and Byung C Chang2
Show affiliationsWe propose a simple isolated link circuit for a multi-channel bio-potential amplifier, by adapting the multiplexing/demultiplexing technique that is generally used in digital circuit design. The reduced number of isolation amplifiers, due to the multiplexing technique, results in an increase in the amount of isolation, as well as a reduction in manufacturing cost. The simple incorporation of a dead-zone in multiplexed timing, and a pull-down resistor in the multiplexed signal line, enables a multiple isolated bio-signal transmission over the shared isolation amplifier, with an affordable inter-channel cross talk.
- PACS
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87.80.-y Biophysical techniques (research methods)
87.19.R- Mechanical and electrical properties of tissues and organs
- Subjects
- Dates
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Issue 2 (May 2002)
Received 29 January 2002, in final form 25 March 2002
Published 19 April 2002
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Improvement of multi-channel isolated bio-potential amplifiers using multiplexing
Sun K Yoo et al 2002 Physiol. Meas. 23 469
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