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Sensor circuit and method of use

A technology of sensor circuit and adjustment circuit, applied in the field of sensor circuit, can solve the problems of large measurement error of temperature sensor, low measurement precision, low precision of switched capacitor amplifier, etc., and achieve the effect of improving measurement precision and reducing measurement error

Active Publication Date: 2020-06-09
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, factors such as process angle changes and layout design will cause voltage deviation of the sensing module, and this voltage deviation is unavoidable, and the accuracy of the existing switched capacitor amplifier is low, which leads to the current temperature sensor It has the disadvantages of large measurement error and low measurement accuracy

Method used

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  • Sensor circuit and method of use
  • Sensor circuit and method of use

Examples

Experimental program
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Embodiment Construction

[0029] There are many problems in the temperature sensor, such as: large measurement error and low measurement accuracy.

[0030] Now combine a temperature sensor to analyze the reasons why the temperature sensor has a large measurement error and low measurement accuracy:

[0031] figure 1 is a structural schematic diagram of a temperature sensor; figure 2 yes figure 1 A schematic structural diagram of the switched capacitor amplifier circuit in the sensing module 21 shown.

[0032] Please refer to figure 1 , the temperature sensor includes: a sensing module 21 and an analog-to-digital conversion module 22 .

[0033] The sensing module 21 includes a temperature converter for converting the temperature signal into a voltage signal V 0 . The sensing module 21 also includes a switched capacitor amplifier circuit.

[0034] Please refer to figure 2 , the switched capacitor amplifier circuit includes:

[0035] An operational amplifier 100, the operational amplifier 100 co...

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Abstract

The invention provides a sensor circuit and a using method thereof. The sensor circuit comprises an operational amplifier, an input module and a feedback module, wherein the operational amplifier comprises a first input end, a second input end and an operational amplification output end; the input module comprises a first connection end and a second connection end, the first connection end is used for inputting signals, the second connection end is connected with the first input end, the input module comprises an adjustment circuit, and the adjustment circuit is used for adjusting the impedance value of the input module; and the feedback module comprises a third connection end and a fourth connection end, the third connection end is connected with the first input end, the fourth connection end is connected with the output end, and the feedback module comprises feedback impedance. The sensor circuit can improve the measurement precision, and the measurement errors are reduced.

Description

technical field [0001] The invention relates to the technical field of semiconductor manufacturing, in particular to a sensor circuit and a use method thereof. Background technique [0002] The temperature sensor is a module that determines the current ambient temperature by measuring the output coded value. The coded value is obtained by converting the voltage value through an analog-to-digital converter (Analog to Digital Converter, ADC). The temperature sensor includes: a temperature converter, which is used to generate a voltage signal varying with temperature; a switched capacitor amplifier, which is used to amplify the input voltage signal; an analog-to-digital conversion module, which is used to convert the amplified voltage signal into encoded value. [0003] During the working process of the temperature sensor, the sensing module converts the ambient temperature into a voltage signal, and the voltage signal is amplified by a switched capacitor amplifier, and then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K1/20G01K15/00
CPCG01K1/20G01K15/00
Inventor 吴蕾陈先敏司徒道明罗睿明
Owner SEMICON MFG INT (SHANGHAI) CORP
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