Power supply independent temperature sensor
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United States of America Patent
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Dec 5, 2000
Grant Date -
N/A
app pub date -
Oct 13, 1998
filing date -
Oct 13, 1998
priority date (Note) -
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Abstract
A temperature sensor is fabricated in an integrated circuit in combination with another device such as a microprocessor using a fabrication technology that is suitable for fabricating the device. Operation of the temperature sensor is based on the bandgap physics of semiconductors using a bandgap reference circuit and an amplifier that generate two measurement voltages, a voltage that is temperature-dependent and a voltage that is temperature-independent. The temperature sensor includes a bandgap power supply circuit that supplies a power supply voltage that is very stable to drive the temperature sensor so that the temperature sensor generates an output signal that is essentially independent of the power supply voltage.
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