Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1992-03-20
1993-07-27
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374163, 361383, 257706, 257467, G01K 700
Patent
active
052305643
ABSTRACT:
A monitoring system for printed circuit boards which are air-cooled utilizes temperature sensors which have thermal diodes embedded directly into the integrated circuits. The thermal diodes are part of the fully-functioning integrated circuit which utilize voltages on the board for driving so that no added power sources are required. The thermal diode has a voltage which is inversely proportional to the temperature and can be calibrated so that a given voltage can be converted into a given temperature. This can be utilized by a logic controller to monitor and control cooling. Pressure sensors are also used with the temperature sensors to monitor air pressure along the ducts leading to the printed circuit boards. Pressure sensors also utilize voltages from the board for driving and have an amplification circuit to increase the signal. The pressure reading can also be utilized by a logic controller for controlling and monitoring the cooling of the boards.
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Bartilson Bradley W.
Schlimme Elliot F.
Bennett G. Bradley
Cray Research Inc.
Cuchlinski Jr. William A.
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