Process and mismatch insensitive temperature sensor

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United States of America Patent

PATENT NO 12031873
APP PUB NO 20230121535A1
SERIAL NO

17504760

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Abstract

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A temperature sensor that is insensitive to process variation and mismatch is disclosed. The temperature sensor includes a PTAT voltage generator, a sampling and gain boosting circuit, a filter and a controller. The PTAT voltage generator utilizes a plurality of current sources, each of which is in electrical communication with the same diode, or diode stack. The output of the PTAT voltage generator is sampled and amplified with the sampling and gain boosting circuit. The output of the sampling and gain boosting circuit is then filtered using a low pass filter. The selection of the current mirrors, the sampling timing and other signals are provided by the controller. In some simulations, the output from the temperature sensor was accurate to within 1.5° C., using a one temperature calibration process.

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Patent Owner(s)

Patent OwnerAddress
SILICON LABORATORIES INC400 W CESAR CHAVEZ AUSTIN TX 78701

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jue, Peh Sheng Singapore, SG 1 0
Sonntag, Jeffrey L Weaverville, US 64 788

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