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Band-gap reference voltage generating circuit

A technology for generating circuits and reference voltages, applied in the direction of regulating electrical variables, instruments, control/regulating systems, etc., can solve the problems of low performance and stability, poor suppression ability, etc., to improve the power supply rejection ratio, improve performance, reduce Effect of Temperature Drift Coefficient

Active Publication Date: 2022-04-12
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, a bandgap reference voltage generation circuit provided by the present invention solves the problems of poor power supply suppression ability, low performance and low stability of the existing bandgap reference circuit

Method used

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Embodiment Construction

[0089] The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Such changes are obvious within the spirit and scope of the present invention as defined and determined by the appended claims, and all inventions and creations utilizing the inventive concept are within the scope of protection.

[0090] like figure 1As shown, in one embodiment of the present invention, a bandgap reference voltage generating circuit includes:

[0091] A bandgap reference voltage generation circuit, comprising: a feedback type startup and bias circuit, a PTAT (proportional to absolute temperature, proportional to absolute temperature) current generation circuit, a CTAT (complementary to absolute temperature, complementary to absolute temper...

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Abstract

The invention discloses a band-gap reference voltage generating circuit, which relates to the field of band-gap reference integrated circuits and comprises a feedback type starting and biasing circuit, a PTAT (proportional to absolute temperature) current generating circuit, a CTAT (complementary to absolute temperature) current generating circuit and a reference voltage output circuit. The band-gap reference voltage generation circuit can be quickly started to generate the reference voltage, the band-gap reference voltage temperature drift coefficient is reduced, the power supply rejection ratio is increased, and the influence of the power supply voltage and temperature on the output reference voltage is reduced. And meanwhile, through a digital signal control means, a digital trimming circuit structure is adopted to compensate the output voltage, so that the accurate output voltage is obtained, and the performance of the band-gap reference circuit is improved on the whole.

Description

technical field [0001] The invention relates to the field of bandgap reference integrated circuits, in particular to a bandgap reference voltage generation circuit. Background technique [0002] With the continuous development of integrated circuits, each functional module in an analog integrated circuit puts forward higher and higher requirements for the stability and robustness of the chip's internal voltage reference and current reference. The bandgap reference circuit is currently the most commonly used voltage and current output reference circuit, and its purpose is to generate a DC voltage or current with definite temperature characteristics that has nothing to do with the power supply and process. [0003] The traditional bandgap reference circuit has poor power supply suppression ability and is greatly affected by temperature drift and process deviation. It is difficult to meet the current high-performance and high-stability analog integrated circuit requirements for...

Claims

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Application Information

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IPC IPC(8): G05F1/567
Inventor 文桢谌东东陈柯旭王帅磊李迪张启东
Owner XIDIAN UNIV
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