Reference current source circuit compensating resistor temperature drift coefficient

A technology of reference current source and temperature drift coefficient, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of not being able to obtain zero temperature drift reference current, and achieve easy promotion and use, high stability and reliability , The effect of accurate zero-drift reference voltage

Active Publication Date: 2013-09-11
江苏芯力特电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this circuit, although the bandgap reference output voltage has nothing to do with temperature, the resistance has a temperature drift coefficient, and the size of the resistance will change with the change of temperature, so the final reference current will still change with the change of temperature, so Unable to obtain accurate zero-drift reference current

Method used

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  • Reference current source circuit compensating resistor temperature drift coefficient
  • Reference current source circuit compensating resistor temperature drift coefficient
  • Reference current source circuit compensating resistor temperature drift coefficient

Examples

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Such as figure 1 As shown, a reference current source circuit for compensating the resistance temperature drift coefficient includes a bandgap reference voltage source, a voltage-current conversion module, a temperature compensation current generation module, and a current summation module. The bandgap reference voltage source The output of the voltage-current conversion module is connected to the input end; the output end of the temperature compensation current generation module is connected to the current summation module; the output end of the voltage-current conversion module is connected to the current summation module; The output end of the current summation module outputs a zero temperature drift current.

[0017] as attached figure 2 As shown, the reference current source circuit for compensating the resistance tempe...

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Abstract

The invention discloses a reference current source circuit compensating resistor temperature drift coefficient. The reference current source circuit comprises a band-gap reference voltage source, a voltage-current converting module, a temperature compensating current generating module and a current summing module. The output of the band-gap reference voltage source is connected with an input end of the voltage-current converting module. An output end of the temperature compensating current generating module is connected with the current summing module. An output end of the voltage-current converting module is connected with the current summing module. An output end of the current summing module outputs zero temperature drift current. The reference current source circuit is simple in structure, high in stability and reliability, capable of obtaining accurate zero temperature drift reference current, and easy to popularize and use.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a reference current source circuit. Background technique [0002] In the CMOS process, the process parameters of the MOSFET are generally related to the temperature, and the temperature change will affect the physical characteristics of the MOSFET, and then affect the various performances of the formed circuit. When the circuit is powered by a current that has nothing to do with temperature, the influence of temperature changes on the circuit can be reduced as much as possible to ensure the stability of the circuit. The reference current source circuit can generate a reference current irrelevant to power supply and temperature changes to supply power to other circuit modules, thereby avoiding the influence of temperature changes on the performance of each circuit module and ensuring the stability of the circuit system. Therefore, the reference current source circuit is widely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
Inventor 段杰斌谢亮张文杰金湘亮
Owner 江苏芯力特电子科技有限公司
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