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Temperature coefficient regulation circuit and temperature compensation circuit

A technology of temperature compensation circuit and temperature coefficient, which is applied in the direction of temperature control, electric variable adjustment, non-electric variable control, etc., and can solve the problems of increasing circuit complexity, temperature coefficient accuracy influence, chip area increase, etc.

Inactive Publication Date: 2011-05-18
GREEN SOLUTION TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the use of analog-to-digital converters not only increases the chip area of ​​the circuit, which increases the cost of the circuit, but also increases the complexity of the circuit. In addition, the accuracy of the temperature coefficient will also be affected by the A / D accuracy.

Method used

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  • Temperature coefficient regulation circuit and temperature compensation circuit
  • Temperature coefficient regulation circuit and temperature compensation circuit
  • Temperature coefficient regulation circuit and temperature compensation circuit

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Embodiment Construction

[0039] figure 2 It is a structural schematic diagram of the temperature coefficient adjustment circuit of the first embodiment of the present invention. Please refer to figure 2 , the temperature coefficient adjustment circuit includes a coefficient adjustment circuit TCB and a current mirror circuit CM. The coefficient adjustment circuit TCB includes a first thermistor RP, an amplifier EA, a transistor M and a second thermistor RN, wherein the first thermistor RP has a positive temperature coefficient and the second thermistor RN has A negative temperature coefficient. The coefficient adjustment circuit TCB receives an input signal ITC, which is a current signal in this embodiment, generates a voltage across the first thermistor RP and inputs it to the non-inverting input terminal of the amplifier EA. The transistor M has a first terminal, a second terminal and a control terminal. The first terminal provides the amplified current ITC', and the second terminal is connecte...

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Abstract

The invention relates to a temperature coefficient regulation circuit and a temperature compensation circuit. The temperature coefficient regulation circuit comprises a first coefficient regulation circuit, a resistance and a second coefficient regulation circuit; and the temperature compensation circuit comprises a detection circuit, a resistance and a coefficient regulation circuit. Compared with the existing temperature compensation circuit in which a thermistor is used to compensate the temperature, the temperature coefficients of the thermistor can be amplified by the temperature coefficient regulation circuit and the temperature compensation circuit so as to match different application environment to provide the compensation range of the required temperature coefficients.

Description

technical field [0001] The invention relates to a temperature coefficient adjustment circuit and a temperature compensation circuit, in particular to a temperature coefficient adjustment circuit and a temperature compensation circuit capable of increasing the temperature coefficient. Background technique [0002] The characteristics of electronic components vary due to changes in operating temperature. In order to prevent temperature changes from affecting the performance of electronic components, temperature compensation is generally used to correct the effects of temperature changes. The most common reference element for temperature compensation is the thermistor, which uses the characteristic that the resistance value of the thermistor changes with temperature to correct the variation of the characteristics of electronic components with temperature, so that the characteristics of electronic components do not change with temperature. [0003] figure 1 It is a structural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/24
CPCG05F3/30G05F3/16
Inventor 陈继明简焕文
Owner GREEN SOLUTION TECH CO LTD
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