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64 select 1 analog switch circuit with t-type switch structure

An analog switch circuit, analog switch technology, used in electronic switches, electrical components, pulse technology and other directions

Inactive Publication Date: 2011-11-30
NO 24 RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The 64 input select 1 analog switch circuit with T-type switch structure has not been reported at home and abroad

Method used

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  • 64 select 1 analog switch circuit with t-type switch structure
  • 64 select 1 analog switch circuit with t-type switch structure
  • 64 select 1 analog switch circuit with t-type switch structure

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Embodiment Construction

[0036] The circuit block diagram of the 64 input selection 1 analog switch circuit of the T-type switch structure of the present invention concrete implementation is as figure 1 As shown, it mainly consists of four 16-to-1 analog switch units 1of16_1~1of16_4, four switch units SW1-SW4 constituting a 4-to-1 analog switch unit, seven level conversion circuit units D1~D7 and a decoder decode1 composition. Its specific structure, connection relationship, and functional relationship are the same as the content of the invention in this specification, and will not be repeated here.

[0037] The specific implementation manners of the present invention are not limited to the following description, and are now further described in conjunction with the accompanying drawings.

[0038] The circuit block diagram of the analog switch circuit of 64 selections of T-type switch structure of the present invention is as figure 1 shown. The whole circuit is divided into four groups, each group ...

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PUM

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Abstract

The invention discloses a 64-choice 1 analog switch circuit with a T-type switch structure, the circuit is mainly composed of four 16-choose 1 analog switch units, four analog switch units constituting a 4-choose 1 analog switch unit, and seven level conversion circuits unit and a decoder. The operating voltage of the circuit of the present invention is ±15V, and the range of the transmitted analog signal is ±10V. The circuit is divided into four groups, and each group is composed of a transmission switch unit cascaded in a 16-choice 1 analog switch unit and a 4-choose 1 analog switch unit. As a result, there is a switch grounded at the internal connection point, forming a T-type switch structure; the selection control function of the circuit is realized by two decoders, which can only select any one of the 64 channels at the same time. The circuit of the invention can increase the on-off ratio of the switch by more than 10dB, reduce the crosstalk between various channels by more than 10dB, and at the same time, is very beneficial to layout. The circuit of the present invention is applied to the front end of the data acquisition system to realize selection and switching processing of 64 channels of analog input; it can also collect 64 channels of digital signals in time division to realize the acquisition and editing of multiple channels of digital signals.

Description

technical field [0001] The invention relates to a 64-select 1 analog switch circuit, in particular to a 64-select 1 analog switch with a T-type switch structure. Its direct application field is the front end of the data acquisition system, which realizes the selection and switching processing of 64 channels of analog input; it can also collect 64 channels of digital signals in time division, and realizes the editing and processing of multi-channel digital signals. Background technique [0002] A common multi-channel analog switch is a multi-channel switch circuit with 16 channels or less. The usual 16-to-1 switch is composed of 16 analog switches, 16 output terminals are connected together, and the inputs of the 16 analog switches are connected to different analog input signals. , The four-bit address code combined with the enable signal generates 16 digital outputs through the 4-16 line decoder, and selects any one of the 16 switches. The 64 input select 1 analog switch ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/00H03K17/693
Inventor 舒辉然冉建桥熊化兵刘伦才石建刚温玉蒲林刘勇唐昭焕
Owner NO 24 RES INST OF CETC
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