NOISE REDUCTION IN INFRASOUND DETECTION
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United States of America Patent
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Issued Date -
Jun 30, 2016
app pub date -
Mar 3, 2016
filing date -
Mar 3, 2016
priority date (Note) -
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Abstract
Provided are methods, circuits and apparatuses for detecting pressure variations. The circuit can comprise at least two pressure sensors electrically coupled in parallel. At least one pressure sensor can have a differential input and a differential output. The circuit can also comprise a first switching mechanism electrically coupled to the differential input of the at least one pressure sensor. The first switching mechanism can be configured to electrically couple a first current source to the at least one pressure sensor according to a first reference signal. The circuit can also comprise a second switching mechanism electrically coupled to the differential output of the at least one pressure sensor. The second switching mechanism can be configured to electrically couple a second current source to the at least one pressure sensor according to a second reference signal.
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