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Analog switch circuit

A technology for simulating switching circuits and voltage generating circuits, applied in the field of semiconductor integrated circuits, can solve problems such as the inability to completely eliminate the influence of temperature and weaken the influence of temperature.

Active Publication Date: 2018-10-23
SHANGHAI AWINIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although the existing technical means can eliminate the change of the on-resistance of the analog switch caused by the transmission signal level, or can weaken the influence of some temperature, it still cannot completely eliminate the influence of temperature on the on-resistance of the analog switch.

Method used

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] refer to figure 1 , figure 1 A schematic structural diagram of an analog switch circuit provided by an embodiment of the present invention, the analog switch circuit includes: a voltage generating circuit ...

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Abstract

The invention discloses an analog switch circuit. The analog switch circuit comprises a voltage generation circuit and a first field-effect transistor; the first end of the voltage generation circuitis connected with the voltage input end, the second end of the voltage generation circuit is connected with the grid electrode of the first field-effect transistor, the third end of the voltage generation circuit is connected with the source electrode of the first field-effect transistor, the source electrode of the first field-effect transistor is further connected with the signal input end, andthe drain electrode of the first field-effect transistor is connected with the signal output end; and the voltage generation circuit is used for generating the voltage for enabling the first field-effect transistor to achieve the constant on resistance. The analog switch circuit thoroughly eliminates the influences of the temperature on the on resistance of an analog switch and can enable the on resistance of the analog switch to be constant, and the performances of the analog switch circuit are improved to a great extent.

Description

technical field [0001] The present invention relates to the technical field of semiconductor integrated circuits, and more specifically, to an analog switch circuit. Background technique [0002] With the continuous development of science and technology, various electronic devices have been widely used in people's daily life, work and industry, bringing great convenience to people's life. [0003] 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 interface in mobile phones, which is often used as Audio audio, USB and UART (Universal Asynchronous Receiver / Transmitter, Universal Asynchronous Receiver / Transmitter, Universal Asynchronous Receiver / Transmitter) ) and other signal transmission multiplexing interfaces, and the change of the on-resistance of the analog switch will affect the transmission quality of signals such as data transmission or audio or even video, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/14
CPCH03K17/145
Inventor 何永强罗旭程程剑涛
Owner SHANGHAI AWINIC TECH CO LTD
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