Title:
TEMPERATURE SENSOR, ELECTRONIC APPARATUS, AND TEMPERATURE MEASUREMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/179212
Kind Code:
A1
Abstract:
Provided are a temperature sensor, an electronic apparatus, and a temperature measurement system. The temperature sensor comprises: a bias current generation circuit, a curvature compensation current generation circuit, a reference voltage generation circuit, and an output voltage generation circuit. The bias current generation circuit is used to generate an initial bias current, the initial bias current and temperature having a non-linear relationship therebetween. The curvature compensation current generation circuit is used to generate a compensation current, and output same to the bias current generation circuit and the output voltage generation circuit, so as to compensate for the initial bias current to acquire a zero temperature coefficient bias current. The temperature sensor of the present application compensates for a non-linear relationship between a reference voltage and temperature, and a non-linear relationship between an output voltage and temperature, so as to compensate for non-linear relationships of the reference voltage and the output voltage, thereby improving temperature measurement accuracy when an output conversion code Dout having a linear relationship with temperature is acquired.
Inventors:
HUA CHAO (CN)
Application Number:
PCT/CN2020/078836
Publication Date:
September 16, 2021
Filing Date:
March 11, 2020
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
G05F3/20; G01K7/01
Foreign References:
| CN101023399A | 2007-08-22 | |||
| CN108646845A | 2018-10-12 | |||
| CN109426296A | 2019-03-05 | |||
| CN109813455A | 2019-05-28 | |||
| US20170023416A1 | 2017-01-26 |
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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