Thermocouple measurement system
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United States of America Patent
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Feb 11, 2014
Grant Date -
Apr 26, 2012
app pub date -
Jan 4, 2012
filing date -
Oct 23, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A thermocouple measuring circuit for sensing a temperature at a measuring point is provided. The thermocouple measurement circuit (12) includes a thermocouple input for sensing a temperature at a measuring point, a compensation circuit (14) for compensating thermocouple effects of junctions of the thermocouple, and an instrumentation amplifier (16) for summing an output of the thermocouple and an output of the compensation circuit and outputting a voltage indicative of the temperature sensed, wherein the output of the compensation circuit is a reference voltage for the output of the instrumentation amplifier. Various embodiments of the thermocouple measurement circuit may be employed in electrosurgical generators for controlling output power dependent on temperature conditions.
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