Temperature detection circuit

Details Temperature detection circuit Temperature detection circuit

2007-07-09

2010-06-08

Verbitsky, Gail (Department: 2855)

Thermal measuring and testing

Thermal calibration system

C374S185000

Reexamination Certificate

active

07731417

ABSTRACT:
A PWM signal generation circuit in an IPM includes an amplification circuit amplifying a voltage across terminals of a temperature sensor, a comparison circuit generating a PWM signal based on a triangular wave signal and an output signal of the amplification circuit, and a correction circuit setting an amplification ratio of the amplification circuit such that a pulse width of the PWM signal is set to a reference pulse width in an adjustment mode in which a switching element is caused to have a reference temperature. Consequently, characteristic variations in the temperature sensor, the amplification circuit, and the like can be corrected, and the temperature of the switching element can be detected with high accuracy.

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patent: 2002-148288 (2002-05-01), None
patent: 2004-85384 (2004-03-01), None

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