Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-precision negative-voltage sectional compensation band gap reference voltage source circuit

A reference voltage source and reference voltage output technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of not being able to meet the requirements and not being able to compensate the reference voltage

Inactive Publication Date: 2015-09-16
NORTH-CHINA INTEGRATED CIRCUIT CO LTD
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the temperature coefficient of the output voltage of this traditional bandgap reference source is usually limited to 20-100ppm / ℃
This is due to V BE The negative temperature coefficient has a nonlinearity, ΔV BE The linear positive temperature characteristic can only offset the first-order negative temperature coefficient. Therefore, in the required operating temperature range, such as -40°C to 125°C, the existing bandgap reference source cannot effectively compensate the reference voltage and cannot meet the negative temperature requirements. Requirements of high precision and high stability negative voltage reference source for voltage integrated regulator

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
  • High-precision negative-voltage sectional compensation band gap reference voltage source circuit
  • High-precision negative-voltage sectional compensation band gap reference voltage source circuit
  • High-precision negative-voltage sectional compensation band gap reference voltage source circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0029] like Figure 2-...

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 discloses a high-precision negative-voltage sectional compensation band gap reference voltage source circuit, and relates to the technical field of integrated circuit voltage regulators. The voltage source circuit comprises a starting circuit, an auxiliary reference current generation circuit with exponent compensation, a first sectional compensation current generation circuit, a second sectional compensation current generation circuit and a negative-pressure sectional curvature compensation band gap reference voltage output circuit. The voltage source circuit conducts curvature compensation on a bipolar two-tube negative-pressure band gap reference circuit through exponent compensation and twice sectional compensation of different high-temperature segments, high-precision negative-voltage reference voltage output is guaranteed, and the power supply rejection ratio of a negative reference source is increased through a negative feedback loop.

Description

technical field [0001] The invention relates to the technical field of integrated circuit regulators, in particular to a high-precision negative pressure segment compensation bandgap reference voltage source circuit. Background technique [0002] The reference voltage source circuit is one of the core parts of the integrated voltage regulator, and its accuracy and stability are directly related to the overall performance of the entire system. The bandgap reference source has significant advantages: it is fully compatible with the standard CMOS process; it can work at low power supply voltage; its temperature drift, noise and power supply rejection ratio performance can meet the requirements of most systems. Therefore, the bandgap reference source has been extensively studied. Today, reference voltage sources are widely used in AD / DA converters, power chips, phase-locked loops (PLL, Phase Locked Loop), high-precision voltmeters, ammeters, ohmmeters, and other fields. [000...

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): G05F1/56
Inventor 赵永瑞刘倩卢东旭崔玉旺师翔
Owner NORTH-CHINA INTEGRATED CIRCUIT CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com