Linear voltage stabilizing circuit

A linear voltage regulator circuit and circuit technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of reducing the current conversion efficiency of the circuit, and achieve the effect of high current conversion efficiency and stability compensation

Active Publication Date: 2012-07-11
大唐电信科技产业控股有限公司
View PDF5 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when the load of the circuit becomes light or no-load, the fixed current loss

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
  • Linear voltage stabilizing circuit
  • Linear voltage stabilizing circuit
  • Linear voltage stabilizing circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0093] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0094] see Figure 4 , which is a structural diagram of Embodiment 1 of the linear voltage stabilizing circuit provided by the present invention.

[0095] The present invention provides a linear voltage stabilizing circuit, comprising: a reference voltage circuit Z1, an error amplifier A1, a feedback circuit, a compensation circuit and an adjustment tube Mp;

[0096] The compensation circuit includes a first PMOS transistor Mp1 and a first NMOS transistor Mn1;

[0097] The gate of the first NMOS transistor Mn1 is connected to the output terminal of the error amplifier A1, the source is grounded, and the drain is connected to the drain of the first PMOS transistor Mp1;

[0098] The drain of the first PMOS transistor Mp1 is connected t...

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 provides a linear voltage stabilizing circuit. A compensation circuit is added, and the linear voltage stabilizing circuit comprises a first PMOS (P-channel metal oxide semiconductor) tube and a first NMOS (N-channel metal oxide semiconductor) tube. A grate of the first NMOS tube is connected with an output end of the error amplifier, a source of the first NMOS tube is grounded, and a drain of the first NMOS tube is connected with a drain of the first PMOS tube. The drain of the first PMOS tube is connected with the grate of the first PMOS tube and a grate of an adjustment tube. The first PMOS tube and the adjustment tube form a current mirror, and accordingly branch current of the first PMOS tube and the adjustment tube is in direct proportion to load current IL. The first PMOS tube and the first NMOS tube can lead the grate of the adjustment tube to be a low-resistance node, a low-frequency pole at the low-resistance node can be in high frequency, and stability of the whole circuit is compensated. Resistance of the grate of the adjustment tube varies with the load, little current is consumed in light load, and the current is barely consumed in a no-load state. High current conversion efficiency in light load or no load state can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a linear voltage stabilizing circuit. Background technique [0002] With the development of technology, portable products are more and more widely used. In order to increase the standby time of portable products, it is necessary to reduce the static power consumption when the whole machine is working, so the power supply needs to have higher conversion efficiency. A linear voltage regulator circuit is currently a better choice as a power supply. The linear voltage regulator circuit is a DC-DC (DC / DC) converter, which converts the input DC voltage into another DC voltage output to supply power to the load. [0003] Combine below figure 1 Introduce the working principle of the linear voltage regulator circuit. [0004] see figure 1 , which is a structural diagram of a typical linear voltage regulator circuit in the prior art. [0005] The input voltage of the linear re...

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 王磊
Owner 大唐电信科技产业控股有限公司
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