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

Analog switch with constant on-resistance

An analog switch, constant conduction technology, applied in the field of analog circuits, can solve the problems of signal transmission influence, on-resistance change, etc., to achieve the effect of wide application range, constant on-resistance, and quality assurance

Pending Publication Date: 2018-09-07
SHANGHAI AWINIC TECH CO LTD
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides an analog switch with constant on-resistance to solve the problem that the change in on-resistance of the analog switch in the prior art affects signal transmission

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
  • Analog switch with constant on-resistance
  • Analog switch with constant on-resistance
  • Analog switch with constant on-resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] As mentioned in the background art section, the on-resistance of the analog switch in the prior art still has a large variation, which affects signal transmission.

[0042] The inventor found that the reason for the above phenomenon is that although the constant Vgs method or substrate effect elimination method is used in the prior art to reduce the variation of the on-resistance of the analog switch, the effect is only to reduce the on-resistance of the analog switch However, the on-resistance of the analog switch cannot be kept constant without changing.

[0043] The inventors found that, in addition to the above-mentioned factors causing the on-resistance of the analog switch to change, the on-resistance of the analog switch will also change with the change of temperature and manufacturing process, while the reduction of the on-resistance of the analog switch in the prior art changes The method does not address the on-resistance changes caused by temperature changes,...

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 application provides an analog switch with constant on-resistance. The analog switch comprises a control current production circuit, a gate-source voltage production circuit and a main switch tube, wherein the control current production circuit produces current for controlling the gate-source voltage production circuit, and then the gate-source voltage production circuit produces the gate-source voltage required by the main switch tube; when the main switch tube is changed due to the temperature, the process and like change factors, the on-resistance is correspondingly changed, the currentfor controlling the gate-source voltage production circuit to output the corresponding gate-source voltage is produced through the control current production circuit, thereby enabling the gate-sourcevoltage of the main switch tube to change, the gate-source voltage of the main switch tube is changed in real time, and then the on-resistance of the main switch tube can be maintained as constant.

Description

technical field [0001] The invention relates to the technical field of analog circuits, in particular to an analog switch with constant on-resistance. Background technique [0002] In electronic equipment, due to the limitation of external interface resources of the equipment, data for different purposes share one interface, such as the USB (Universal Serial Bus, Universal Serial Bus) interface in mobile phones, which is often used as Audio (audio), USB and UART (Universal Asynchronous Receiver / Transmitter, Universal Asynchronous Receiver Transmitter) and other multiplexing interfaces for signal transmission. The on-resistance variation of the analog switch will affect the quality of these signal transmissions, thereby causing unnecessary errors. For example, there is a data transmission error in the USB, the sound quality of the audio is degraded, and the image quality of the video is degraded. [0003] At present, CMOS transistors are commonly used as transmission switch...

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): H03K17/14H03K17/687
CPCH03K17/145H03K17/687
Inventor 何永强罗旭程程剑涛张艳萍
Owner SHANGHAI AWINIC TECH 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