Self-calibrating thermometer
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United States of America Patent
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Oct 9, 1984
Grant Date -
N/A
app pub date -
Apr 9, 1982
filing date -
Apr 9, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A calibration system for a temperature sensing probe in an electronic thermometer, including: a reference temperature element having a characteristic that varies as a function of temperature; a reference temperature sensing circuit, responsive to the reference element, for providing a reference signal representative of the temperature sensed by the reference element; a probe temperature sensing circuit responsive to the probe for providing a probe signal representative of the temperature sensed by the probe; means for releasably interconnecting the probe and the probe temperature sensing circuit; and comparator means for comparing the probe signal representative of the temperature sensed by the probe and the reference signal representative of the temperature sensed by the reference element; the probe temperature sensing circuit being responsive to the comparator means for adjusting the probe signal representative of the temperature sensed by the probe to match the reference signal representative of the temperature sensed by the reference element.
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