LED drive circuit for pulse oximetry and method for using same
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United States of America Patent
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Feb 5, 2013
Grant Date -
Jul 2, 2009
app pub date -
Dec 24, 2008
filing date -
Dec 26, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In various embodiments, there is provided an LED drive circuit and a method for using the same. Specifically, the present disclosure is directed to an LED drive circuit for pulse oximeters. In an embodiment, the LED drive circuit includes a current mirror configured to provide drive current to an LED of a sensor. Additionally, the method includes providing current to first and second current mirrors, wherein the first and second current mirrors are configured to control first and second light sources.
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