Circuit arrangement for compensating for the temperature dependence of the sensitivity and the null point of a piezoresistive pressure sensor
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United States of America Patent
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May 26, 1987
Grant Date -
N/A
app pub date -
Jan 17, 1986
filing date -
Jan 30, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit arrangement for compensating for the temperature dependence of the sensitivity and of the null point of a piezoresistive pressure sensor having a temperature sensor thermally coupled thereto. The temperature sensor is coupled to an auxiliary amplifier, in the output circuit of which the feed diagonal of the pressure sensor is connected. The output diagonal of the pressure sensor is connected to an output amplifier, to which a temperature-dependent correction voltage can be applied on the input side via a resistor arrangement. To perform the compensation of the temperature dependence of the sensitivity independently of the temperature dependence of the null point, the resistor arrangement is connected directly to the output of the temperature sensor, preferably via jumpers.
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