Temperature detection circuit

Details Temperature detection circuit Temperature detection circuit

2007-09-18

2009-06-02

Verbitsky, Gail (Department: 2855)

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

C374S170000, C702S130000, C702S133000, C327S513000

Reexamination Certificate

active

07540657

ABSTRACT:
A temperature detection circuit according to the present invention includes a potential generating part and a temperature detection part. The potential generating part generates a potential according to an environmental temperature, and the temperature detection part detects a temperature based on a detection potential generated in the potential generated part. The temperature detection part is a resistive load type inverter circuit that outputs a detection signal when the generated potential reaches a threshold voltage. The potential generating part applies the detection potential to the inverter circuit through a temperature sensor including cascaded diodes and an NchMOSFET. The threshold voltage of the inverter circuit is determined based on the NchMOSFET in the inverter circuit, and the NchMOSFET is a MOSFET having the same characteristic as the NchMOSFET of the potential generating part.

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