Temperature sensor and method for operating a temperature sensor
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United States of America Patent
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Sep 14, 2004
Grant Date -
Jul 31, 2003
app pub date -
Aug 13, 2002
filing date -
Jan 30, 2002
priority date (Note) -
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Abstract
The invention relates to a temperature sensor having a first FET transistor circuit and a second FET transistor circuit and also to a method for operating a temperature sensor. Both FET transistor circuits are operated at an operating point that lies outside the temperature-independent operating point. The difference between the voltages at the first and second FET transistor circuits is evaluated as a measure of the temperature at one of the FET transistor circuits. The invention enables the temperature sensor to provide a relatively large output signal even in the case of only small changes in temperature.
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