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Input stage circuit of high-precision low-noise analog switch

An analog switch and low-noise technology, which is applied in the input stage circuit field of high-precision and low-noise analog switch, can solve the problem of increased power consumption

Pending Publication Date: 2020-10-27
HENGYANG TRANSISTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The on-resistance is usually reduced by increasing the size of the device, but this method will bring disadvantages such as increased power consumption

Method used

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  • Input stage circuit of high-precision low-noise analog switch

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Embodiment 2

[0020] Embodiment 2, on the basis of Embodiment 1, the first reference power supply V1 is a constant +5V voltage, the second reference power supply V0 is a constant -5V voltage, the transistor MP1, the transistor MP2, the transistor MP3, the transistor MP4 and transistor MP5 are P-type enhanced field effect transistors; transistors MN1 , transistor MN2 , transistor MN3 , transistor MN4 , transistor MN5 , transistor MN6 and transistor MN7 are all N-type enhanced field effect transistors.

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Abstract

The invention discloses an input stage circuit of a high-precision low-noise analog switch. The circuit comprises a transistor MP1 and a transistor MN1. The grid electrode of the transistor MP1 is connected with the grid electrode of the transistor MN1 and the input end IN; the source electrode of the transistor MP1 is connected with the source electrode of the transistor MP2, the source electrodeof the transistor MP3 and a first reference power supply V1; and the drain electrode of the transistor MP1 is connected with the drain electrode of the transistor MN1, the grid electrode of the transistor MP2 and the grid electrode of the transistor MN2. According to the input stage circuit of the high-precision low-noise analog switch, analog signal distortion-free transmission can be achieved,noise can be restrained, and the on-resistance of the analog switch circuit can be reduced.

Description

technical field [0001] The invention relates to the technical field of switches, in particular to an input stage circuit of a high-precision and low-noise analog switch. Background technique [0002] In recent years, portable products have increasingly adopted multi-source designs, so switching functions are an important part of video and audio transmission and processing. The mechanical switch adopted in the early stage has the characteristics of low reliability, large size and high power consumption, so the analog switch has attracted more and more people's attention, and has been widely used in various electronic products. [0003] The analog switch is a switch that uses the characteristics of analog devices to realize the control signal path, and is mainly used to complete the switching function of connecting or disconnecting the signal link. The analog switch is a tri-stable circuit, which can determine the connection state of the input and output according to the leve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/06
CPCH03K17/06
Inventor 李柯烨李爱夫胡封林
Owner HENGYANG TRANSISTOR
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