Media isolated absolute pressure sensor
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United States of America Patent
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Sep 19, 2006
Grant Date -
Sep 14, 2006
app pub date -
Mar 10, 2005
filing date -
Mar 10, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and media-isolated absolute pressure sensor apparatus includes a first sensor (101) to measure a pressure difference between an isolated media (P1) and a second media (Pa). A second sensor (103) measures an absolute (relative to vacuum) pressure of the second media (Pa). Each sensor (101, 103) has its own offset and slope response. An equalizer (217, 219) matches the slopes of the sensors (101, 103), wherein a summing circuit (225) can add the substantially same slope outputs to provide an output signal (227) indicative of an absolute pressure measurement of the isolated media (P1). Offset and temperature compensation of each sensor can also be provided.
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