Temperature detection circuit

A temperature detection circuit and temperature sensor technology, applied in thermometers, measuring devices, measuring heat, etc., can solve problems such as complex circuit structure, small temperature changes, and undetectable
CN109374151AInactive Publication Date: 2019-02-22广州市优仪科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
广州市优仪科技有限公司
Publication Date
2019-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a temperature detection circuit, which comprises at least two temperature sensor input units, a gating module, a signal amplification module, an integration module, a voltage comparison module and a central processing module. The gating module is connected with the at least two temperature sensor input units respectively, so as to output a detection voltage signal of one temperature sensor input unit in the at least two temperature sensor input units; an input end of the signal amplification module is connected with an output end of the gating module, and is used for amplifying the detection voltage signal output by means of the gating module; the integration module is connected with an output end of the signal amplification module so as to acquire an amplification signal output by the signal amplification module, and performing integral operation on the amplification signal; the voltage comparison module is connected with the integration module so as to comparean integral voltage output after calculating integral of the integration module, and outputting a level signal according to the comparison result; and the central processing module is connected with the voltage comparison module, and is used for calculating to obtain a temperature value detected by the corresponding temperature sensor according to the level signal output by the voltage comparisonmodule.
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Description

technical field

[0001] The invention relates to the field of temperature detection, in particular to a temperature detection circuit. Background technique

[0002] In the prior art, the temperature detection mostly adopts the thermistor to sense the temperature change, and realizes the temperature detection by sensing the voltage change on the thermistor.

[0003] However, the detection sensitivity of the temperature detection circuit in the prior art is low, it cannot detect small temperature changes, and the circuit structure is complicated and the cost is high.

[0004] Therefore, there are defects in the prior art, and improvement is badly needed. Contents of the invention

[0005] The object of the present invention is to provide a temperature detection circuit, which has the beneficial effects of improving detection accuracy and reducing cost.

[0006] An embodiment of the present invention provides a temperature detection circuit, including:

[0007] At least two...

Claims

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