Bandgap reference voltage generating circuit and electronic system using it

A technology of reference voltage and circuit generation, which is applied in the direction of control/regulation system, regulation of electrical variables, instruments, etc. It can solve the problems affecting the stability of reference voltage and the variation of ambient temperature system voltage, and achieve the effect of good temperature effect

Active Publication Date: 2016-01-20
ADVANCED SEMICON ENG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general reference voltage generation circuits may encounter related problems related to changes in ambient temperature or system voltage variations that affect the stability of the reference voltage

Method used

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  • Bandgap reference voltage generating circuit and electronic system using it
  • Bandgap reference voltage generating circuit and electronic system using it
  • Bandgap reference voltage generating circuit and electronic system using it

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Embodiment Construction

[0060] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like numbers indicate like elements throughout.

[0061] It will be understood that, although the terms first, second, third etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Thus, a first element discussed below could be termed a second element without...

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Abstract

The invention discloses a band gap reference voltage generation circuit and an electronic system using the same. The band gap reference voltage generation circuit comprises a three-way current source circuit, a buffer, a differential amplification circuit, a feedback circuit, a first transistor, a second transistor, a third resistor and a fourth resistor, wherein the three-way current source circuit is used for increasing the power supply inhibition rate of a band gap reference voltage generation circuit so as to stabilize a first current; the first current is used for biasing the differential amplification circuit. By the adoption of the band gap reference voltage generation circuit, the temperature curve of reference voltage can be compensated by adjusting the value of the resistance.

Description

technical field [0001] The present invention relates to a bandgap reference voltage generation circuit, in particular to a bandgap reference voltage generation circuit independent of system voltage and temperature. Background technique [0002] With the continuous innovation and improvement of high technology, consumer electronic products have gradually become popular in people's lives, especially various handheld electronic devices, such as mobile phones, digital cameras, personal digital assistants or tablet computers, etc., because of their thinness and shortness, The feature of being portable is deeply loved by people. However, the use of handheld electronic devices must consider the length of power supply time. At present, battery devices such as nickel metal hydride batteries and lithium batteries are mostly used, and additionally used with a charger that meets the specifications of the battery device. [0003] The design of bandgap reference voltage source circuits i...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G05F1/567
Inventor丁兆明
OwnerADVANCED SEMICON ENG INC