Medical sensor with amplitude independent output
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United States of America Patent
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Oct 5, 1999
Issued Date -
N/A
app pub date -
Sep 9, 1996
filing date -
Dec 17, 1993
priority date (Note) -
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Abstract
The present invention provides a medical sensor for detecting a blood characteristic. The sensor includes a transducer for producing an analog signal related to the blood characteristic. The analog signal is converted into a transmission signal which is in amplitude-independent form for transmission to a remote analyzer. In one embodiment, a current-to-frequency converter converts a signal from a pulse oximeter sensor into a frequency signal which can be transmitted over a transmission line to a remote pulse oximeter.
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