Temperature detection cell, and method to determine the...

Details Temperature detection cell, and method to determine the... Temperature detection cell, and method to determine the...

2006-02-21

2006-02-21

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Temperature measuring system

C702S130000

Reexamination Certificate

active

07003424

ABSTRACT:
A temperature detection cell includes a circuit for producing a voltage that increases with temperature, a circuit producing a voltage that decreases with temperature, and a comparison circuit to compare the increasing voltage with the decreasing voltage. The comparison circuit produces a warning signal when the temperature reaches a detection threshold such that the decreasing voltage becomes lower than the increasing voltage. The cell also has a test circuit to determine the detection threshold of the cell. Also disclosed is a method for testing a temperature detection cell, during which the detection threshold of a cell is determined from measurements of the increasing voltage and the decreasing voltage at a reference temperature.

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Riedijk et al., An Integrated Absolute Temperature Sensor with Sigma-Delta A-D Conversion, Sensors and Actuators A, Elsevier Sequoia S.A., Lausanne, CH, vol. A34, No. 3, Sep. 1, 1992, pp. 249-256.

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