Advanced thermal sensor

Details Advanced thermal sensor Advanced thermal sensor

2008-09-23

2008-09-23

Verbitsky, Gail (Department: 2859)

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

C374S001000, C374S170000, C374S178000, C327S513000

Reexamination Certificate

active

11034644

ABSTRACT:
Systems and methods for reducing the complexity and size of thermal sensors, where the voltage of a thermally sensitive device is compared to a reference voltage that varies as a function of temperature, rather than being constant. One embodiment comprises a thermal sensing system including a reference voltage generator, a thermal sensor and a comparator. The reference voltage generator is configured to generate a non-constant reference voltage that varies as a known function of temperature. The thermal sensor is configured to generate a sensor voltage that also varies as a known function of temperature. The functions of the reference and sensor voltages cross at a known temperature/voltage. The comparator is configured to compare the sensor voltage and the reference voltage and to generate a comparison output signal based on the comparison of the sensor voltage and the first reference voltage. A transition in this signal indicates the reference temperature.

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