Check patentability & draft patents in minutes with Patsnap Eureka AI!

Charge pump circuit capable of generating positive and negative voltages

A positive and negative voltage, charge pump technology, applied in the direction of conversion equipment without intermediate conversion to AC, to achieve the effect of saving circuit area and cost, and improving the effect significantly

Pending Publication Date: 2022-08-02
NEWRADIO TECH CO LTD
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although an improvement in circuit area and cost over fully independent positive and negative charge pumps, there is still room for improvement

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
  • Charge pump circuit capable of generating positive and negative voltages
  • Charge pump circuit capable of generating positive and negative voltages
  • Charge pump circuit capable of generating positive and negative voltages

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] A charge pump circuit that can generate positive and negative voltages provided by the present invention is described in detail below in conjunction with the embodiments and the accompanying drawings:

[0024] An embodiment of the present invention provides a charge pump circuit capable of generating positive and negative voltages, including:

[0025] A charge pump or a cascaded charge pump formed by cascading multiple identical charge pumps to generate the required positive and negative high voltages;

[0026] A group of switch tubes are connected to the charge pump for selectively outputting a positive high voltage or a negative voltage.

[0027] Further, each charge pump in the one charge pump or the cascaded charge pump adopts a charge pump with a cross-coupling structure composed of two PMOS transistors, two NMOS transistors and two capacitors.

[0028] Further, the gate of the first NMOS tube in the charge pump is connected to the source and drain of the second N...

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 a charge pump circuit capable of generating positive and negative voltages, and belongs to the technical field of charge pump circuits, the circuit comprises a charge pump or a cascade charge pump formed by cascading a plurality of same charge pumps, and the circuit is used for generating the required positive and negative high voltages; the group of switch tubes is connected with the charge pump and is used for selectively outputting positive high voltage or negative voltage. Under the condition that positive high voltage or negative high voltage is output respectively, only one charge pump and one group of switching tubes are needed. Under the condition that positive high voltage or negative high voltage is output respectively, the charge pump shares the group of switching tubes, so that the circuit area and the cost are remarkably saved, and the improvement effect is particularly remarkable for the charge pump with large current and large power consumption. In addition, the circuit structure is easy to generate voltage amplitude meeting system requirements in a cascade form.

Description

technical field [0001] The present invention relates to the technical field of charge pump circuits, in particular to a charge pump circuit capable of generating positive and negative voltages. Background technique [0002] Charge pumps can be used in various electronic devices, such as non-volatile memories, display drivers, audio drivers, etc., to generate a voltage higher than a power supply voltage or a negative voltage lower than a ground voltage. [0003] Circuits similar to the charge pump also include LDO and switching power supply circuits, each of which has its own advantages and disadvantages. Among them, the output ripple of LDO is small, and the output voltage is easy to adjust, but the output voltage can only be lower than the power supply voltage, not higher than the power supply voltage, nor lower than the ground voltage. The output voltage of the switching power supply circuit is easy to adjust, and can be higher than or lower than the power supply voltage....

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): H02M3/07
CPCH02M3/07H02M3/071
Inventor 李弦陈振骐陈勇刚
Owner NEWRADIO TECH CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com