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Power-consumption-free analog switch with voltage processing function

A technology for simulating switches and functions, applied in electronic switches, electrical components, pulse technology, etc.

Pending Publication Date: 2020-08-07
DIOO MICROCIRCUITS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a non-power consumption analog switch with a voltage processing function, which solves the problem that the switch tube can be quickly turned off and isolates positive and negative voltages after power failure, and has a positive and negative voltage processing function at the same time

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  • Power-consumption-free analog switch with voltage processing function
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  • Power-consumption-free analog switch with voltage processing function

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Embodiment Construction

[0041] 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.

[0042] See attached figure 1 As shown, the embodiment of the present invention discloses a non-power consumption analog switch with a voltage processing function, including:

[0043] The first switch tube 11;

[0044] A first drive circuit 114, the drive circuit 114 is connected to the gate of the first switch tube 11;

[0045] The pull-up tube 13, the drain of the pull-up tube 13 is connected to the gate of the first drive circuit 114 and the first switch t...

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Abstract

The invention discloses a power-consumption-free analog switch with a voltage processing function. The power-consumption-free analog switch comprises two switch tubes, a pull-up tube, a pull-down tube, a pmos substrate selection circuit, a nmos substrate selection circuit, a drive circuit, a level shift circuit, a power supply voltage detection circuit and a high-low voltage selection circuit. Theinvention provides a power-consumption-free analog switch with the voltage processing function, the switch input and output are completely symmetrical, bidirectional conduction can be realized, the switch tube has the characteristic of transmitting positive and negative voltage signals, the switch tube can be quickly turned off after the power supply is powered off, the transmission of positive and negative voltage signals of the input end is blocked, the isolation degree of the switch tube in a power supply voltage power-off state is greatly improved, and the analog switch has no static power consumption.

Description

technical field [0001] The invention relates to the technical field of analog switches, more specifically to the field of a non-power consumption analog switch with voltage processing capability. Background technique [0002] The analog switch is mainly to complete the signal switching function in the signal chain. The MOS tube switch method is used to realize the shutdown or opening of the signal chain. Since the function is similar to a switch and is realized by the characteristics of an analog device, it is called an analog switch. For Different application requirements, analog switches can be divided into audio analog switches, video analog switches, digital switches and general analog switches, etc. [0003] At present, for analog switches used to transmit audio signals, the isolation of the switch in the power-off state is an important indicator. Audio analog switches usually use a pair of associated pmos tubes and nmos tubes. This switch can only meet the requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/04H03K17/687H03K17/689H03K17/693
CPCH03K17/04H03K17/6874H03K17/689H03K17/693H03K17/002
Inventor 张庆亚付美俊靳瑞英
Owner DIOO MICROCIRCUITS CO LTD
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