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Temperature sensor based on capacitance-to-digital-converter

A temperature sensor and sensor technology, applied in the field of sensors, can solve the problems of large detection errors of temperature sensors, difficulty in implementation, complex structure of CDC readout circuit, etc., and achieve the effect of solving complex structure and strong practicability

Pending Publication Date: 2018-06-01
SHENZHEN UNIV
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Problems solved by technology

[0004] The present invention provides a temperature sensor based on a capacitance-to-digital converter, aiming at solving the problems in the prior art that the structure of the CDC readout circuit is too complex, difficult to implement, and the temperature sensor has a relatively large detection error

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Embodiment Construction

[0047]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0048] figure 1 A schematic structural diagram of a temperature sensor based on a capacitance-to-digital converter provided by an embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The details are as follows:

[0049] Such as figure 1 As shown, the temperature sensor 10 includes a sensor front-end circuit 101 , a CDC readout circuit 102 and a digital processing circuit 103 .

[0050] The sensor front-end circuit 101 detects the temperature change of the outside world, and the sensor front-en...

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Abstract

The present invention belongs to the technical field of sensors, and provides a temperature sensor based on a capacitance-to-digital-converter. The temperature sensor comprises: a sensor front-end circuit configured to generate first temperature variation signals, second temperature variation signals and third temperature variation signals according to temperature variation amount; a CDC reading circuit connected with the sensor front-end circuit and configured to generate digital codes according to the first temperature variation signals, the second temperature variation signals and the thirdtemperature variation signals; and a digital processing circuit connected with the CDC reading circuit and configured to output the digital codes. The temperature sensor based on the capacitance-to-digital-converter can effectively solve the problems that the CDC reading circuit is too complex in structure, low in practicality and large in temperature detection error in a current temperature sensor.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to a temperature sensor based on a capacitance-to-digital converter. Background technique [0002] With the rapid development of modern electronic technology, all kinds of electronic products are gradually becoming portable and miniaturized. Temperature sensors based on modern CMOS (Complementary Metal Oxide Semiconductor) technology have been obtained due to their strong compatibility. In the relevant prior art, CDC (Capacitance-to-Digital-Converter, Capacitance-to-Digital Converter) readout circuit converts the temperature change detected by the temperature sensor circuit into a recognizable number code, and then the digital code can directly obtain the temperature value of the external environment through subsequent digital processing, thereby realizing the direct measurement of the ambient temperature. [0003] Therefore, there are at least the following problems in the prior a...

Claims

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Application Information

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IPC IPC(8): G01K7/01
CPCG01K7/01G01K2219/00
Inventor 黎冰马林发
Owner SHENZHEN UNIV
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