Electronic processor for pulse oximeter
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United States of America Patent
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Sep 20, 1994
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N/A
app pub date -
Mar 31, 1993
filing date -
Mar 31, 1993
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Abstract
An electronic processor for calculating in vivo blood oxygenation concentration levels using pulsed light that eliminates both requirements for comparing photosensor signal amplitudes with analog/digital circuit dynamic ranges and also adjusting electronic processor parameters. The invention uses monolithic a/d converters with expanded capacity and a microcontroller/processor with a pulse control module to synchronize switching in an oversampling demodulator with pulsing of light sources to overcome prior circuitry limitations that consumed substantial central processor capacity.
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