Sensor drive circuit with improved temperature characteristic compensation

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United States of America Patent

PATENT NO 11525751
SERIAL NO

17303282

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A sensor drive circuit for driving a sensor with a current includes at least one circuit configured to generate a drive current for the sensor, the drive current having a reverse temperature characteristic with respect to a temperature characteristic of an output voltage of the sensor. A temperature characteristic of sensor sensitivity has a negative first order coefficient and a positive second order coefficient. The sensor drive circuit includes a first current source configured to generate a first current having a temperature characteristic of which a first order coefficient is positive. The sensor drive circuit includes a second current source configured to generate a second current having a temperature characteristic of which a first order coefficient is negative. The sensor drive circuit includes a first current calculator configured to add the first current and the second current to generate a third current.

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Patent Owner(s)

Patent OwnerAddress
MITSUMI ELECTRIC CO LTD2-11-2 TSURUMAKI TAMA-SHI TOKYO 206-8567

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakamura, Hajime Tokyo, JP 164 2612

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