Temperature detection circuit

Details Temperature detection circuit Temperature detection circuit

2008-01-31

2010-10-26

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

C327S083000, C327S513000

Reexamination Certificate

active

07821320

ABSTRACT:
A temperature detection circuit includes a bandgap reference voltage generation circuit, a detection output circuit, and an output conversion circuit. The bandgap reference voltage generation circuit generates a first reference voltage and causes a bias current to flow through a current path to produce a thermal voltage. The current path has a first resistor. The detection output circuit has a second resistor and causes a mirror current of the bias current to flow through the second resistor. The output conversion circuit uses a second reference voltage to convert a voltage drop across the second resistor to a predetermined output form to detect a temperature. The first and second resistors are substantially identical in temperature dependence. The second reference voltage is generated from the first reference voltage.

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Office Action dated May 25, 2009 from the German Patent Office in the corresponding DE Application No. 10 2008 000 230.5-52 (and English Translation).

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