Temperature sensor integral with microprocessor and methods of u

Details Temperature sensor integral with microprocessor and methods of u Temperature sensor integral with microprocessor and methods of u

1997-09-26

1999-10-05

Bennett, G. Bradley

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

G01K 701

Patent

active

059612150

ABSTRACT:
A temperature sensor includes a bandgap reference circuit for providing a temperature-independent reference voltage, a biasing circuit that mirrors a current in the bandgap reference circuit for providing a temperature-dependent biasing voltage, and an amplifier responsive to the reference voltage and the biasing voltage for providing a temperature-dependent output voltage. Preferably, the temperature sensor is integral with a microprocessor and implemented in CMOS technology. The temperature sensor can be used, for instance, to reduce the clock speed of the microprocessor when the microprocessor temperature exceeds a predetermined temperature, or to store temperature-indicating data in non-volatile memory of the microprocessor to provide a thermal history of the microprocessor.

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