Temperature detection circuit
First Claim
1. A temperature detection circuit, comprising:
- a potential generating part generating a potential corresponding to a detection temperature; and
a temperature detection part detecting a temperature based on a generated potential in the potential generating part, wherein the temperature detection part includes a detection device composed of a semiconductor device detecting a temperature based on the generated potential, and the potential generating part includes a semiconductor device having substantially the same characteristic as the detection device.
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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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Citations
14 Claims
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1. A temperature detection circuit, comprising:
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a potential generating part generating a potential corresponding to a detection temperature; and
a temperature detection part detecting a temperature based on a generated potential in the potential generating part, wherein the temperature detection part includes a detection device composed of a semiconductor device detecting a temperature based on the generated potential, and the potential generating part includes a semiconductor device having substantially the same characteristic as the detection device. - View Dependent Claims (2, 3, 4, 5)
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6. A temperature detection circuit, comprising:
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a potential generating part including a constant current circuit, and a temperature sensor supplied with a constant current from the constant current circuit, and generating a potential corresponding to a detection temperature; and
a temperature detection part detecting a temperature based on a generated potential in the potential generating part, wherein the temperature detection part includes a detection device composed of a semiconductor device detecting a temperature based on the generated potential, and the potential generating part includes a semiconductor device having substantially the same characteristic as the detection device. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification