Method and apparatus to remotely sense the temperature of a...

Details Method and apparatus to remotely sense the temperature of a... Method and apparatus to remotely sense the temperature of a...

2006-02-14

2006-02-14

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

C374S170000

Reexamination Certificate

active

06998899

ABSTRACT:
Apparatus for indirectly sensing the temperature of a power MOS device comprising a power MOS device having a current sense circuit for sensing the current in the power MOS device, a circuit for producing a voltage related to the drain-source voltage of the power MOS device, a comparator coupled to receive at a first input the voltage related to the drain-source voltage of the power MOS device and at a second input a voltage related to the current in the power MOS device, the comparator generating an overtemperature protection signal when a predetermined inequality between the voltages at the first and second inputs to the comparator occurs.

REFERENCES:
patent: 5796278 (1998-08-01), Osborn et al.
patent: 6507227 (2003-01-01), Genova et al.

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