Voltage reference source circuit and method for generating voltage reference source

A voltage reference source and circuit technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems affecting the output voltage accuracy, deviation, temperature coefficient degradation of the reference voltage, etc., and achieve the effect of easy implementation and simple structure

Active Publication Date: 2011-07-13
HI TREND TECH SHANGHAI
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its simulation optimal temperature coefficient is 0.7ppm/°C. Although this structure can realize a reference voltage with a temperature coefficient of sub-1ppm/°C, the stability of its temperature coefficient varies with the process angle, and the high-order positive temperature characteristic current occurs Larger changes, because its ratio is fixed, the non

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Voltage reference source circuit and method for generating voltage reference source
  • Voltage reference source circuit and method for generating voltage reference source
  • Voltage reference source circuit and method for generating voltage reference source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0029] The core of the present invention is that the voltage reference source circuit includes:

[0030] Reference core circuit for generating positive temperature coefficient current;

[0031] A high-order temperature coefficient compensation circuit for generating a non-linear positive temperature coefficient current whose magnitude varies with...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an integrated circuit and discloses a voltage reference source circuit and a method for generating a voltage reference source. The method comprises the following steps of: generating a self-adaption nonlinear PTAT (positive temperature coefficient) current through a high-order temperature coefficient compensation circuit; converting the current into a self-adaption nonlinear PTAT voltage and then superposing the voltage with a first-order reference voltage; and generating the reference voltage approximate to zero-temperature coefficient, as the voltage reference source. The self-adaption nonlinear PTAT voltage counteracts the nonlinear negative temperature coefficient in the first-order reference voltage, so the voltage reference source has lower temperature coefficient. In addition, the structure is simple, the compensation branch stability is better and the influence on the initial precision of the voltage reference source is small.

Description

technical field [0001] The present invention relates to integrated circuits, in particular to voltage reference sources in integrated circuits. Background technique [0002] The bandgap voltage reference source is one of the important IP circuits in the design of analog integrated circuits and digital-analog hybrid integrated circuits. Its main function is in the low dropout linear regulator (Low Dropout Regulator, referred to as "LDO"), DC-DC (DC-DC conversion), analog-to-digital converter (Analog Digital Converter, referred to as "ADC") / digital-to-analog conversion Digital Analog Converter (DAC for short) and System on Chip (SoC for short) systems provide stable voltage or current, and are also widely used in precision measuring instruments. [0003] Existing bandgap voltage references are based on the base-emitter voltage difference ΔV of two transistors BE Generate a positive temperature coefficient voltage and the voltage across the transistor base and emitter volta...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G05F3/26
Inventor 王永寿萧经华郎君佘龙胡建国
Owner HI TREND TECH SHANGHAI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap