Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Reexamination Certificate
2002-01-16
2004-10-26
Gutierrez, Diego (Department: 2859)
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
Reexamination Certificate
active
06808307
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for electronic temperature sensing and recording devices. More specifically, the present invention is directed to improving the accuracy of temperature measurements made during temperature changes by interleaving bias currents of a forward-biased PN junction in a remote temperature remote sensor (“remote sensor”). Temperature measurements are made by applying two different currents to the PN junction and measuring the resulting potential across the PN junction. Temperature calculations are made by determining the difference (“&Dgr;V
for
”) between the measured voltages for each applied current.
SUMMARY OF THE INVENTION
The present invention is directed to a method and apparatus that improves temperature measurements made with a remote sensor. More specifically the present invention is directed towards a method and apparatus that improves the accuracy of temperature measurements that are made during temperature changes by interleaving bias currents of a forward-biased PN junction in a remote sensor.
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Aslan Mehmet
Henderson Richard Dean
Ng Chungwai Benedict
Oshima Hideya
Ren Qing Feng
Gutierrez Diego
Hennings Mark R.
Jagan Mirellys
Merchant & Gould
National Semiconductor Corporation
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