Multi-stream sensor front ends for noninvasive measurement of blood constituents
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United States of America Patent
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Jan 14, 2014
Grant Date -
Feb 4, 2010
app pub date -
Aug 3, 2009
filing date -
Aug 4, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure relates to an interface for a noninvasive glucose sensor that comprises a front-end adapted to receive an input signals from optical detectors and provide corresponding digital signals. In one embodiment, the front-end comprises switched capacitor circuits that are capable of handling multiple streams signals from the optical detectors. In another embodiment, the front-end comprises transimpedance amplifiers that are capable of handling multiple streams of input signals. In this embodiment, the transimpedance amplifier may be configured based on its own characteristics, such as its impedance, the impedance of the photodiodes to which it is coupled, and the number of photodiodes to which it is coupled.
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