Pulse oximeter with sigma-delta converter
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United States of America Patent
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Jul 13, 1999
Grant Date -
N/A
app pub date -
Dec 18, 1996
filing date -
Dec 18, 1996
priority date (Note) -
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Abstract
A preferred oximeter detects the transillumination by red and infrared light of a portion of an in vivo subject and produces analog signals representative thereof on two channels. Sigma-delta modulators sample the analog signals on each channel. A digital filter processor digitally filters the sample signals from both modulators to produce respective digital signals with multi-bit resolution.
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