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An isolated four-wire communication one-to-two circuit

An isolated and circuit technology, which is applied in branch office equipment, electrical components, telephone communication, etc., can solve the problems of mutual crosstalk between equipment, poor call effect, complex circuit, etc., and achieve improved safety and reliability, low cost, and audio fidelity high effect

Active Publication Date: 2021-02-09
泰弗思科技(安徽)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] Aiming at the above-mentioned shortcomings existing in the prior art, the present invention provides an isolated four-wire call-to-two circuit, which can effectively overcome the complex circuits, high cost, crosstalk between devices, and poor call effect existing in the prior art. poor defect

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  • An isolated four-wire communication one-to-two circuit

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but 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 creative efforts fall within the protection scope of the present invention.

[0027] An isolated four-wire call one-to-two circuit, such as figure 1 As shown, it includes an audio input differential signal and an audio output differential signal. An isolation module for isolation and a signal amplification module for amplifying the audio signal are connected between the audio input differential signal and the audio output differential si...

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Abstract

The invention relates to subway communication, in particular to an isolated four-wire call one-to-two circuit. The circuit comprises an audio input differential signal, an audio output differential signal, an isolation module connected between the audio input differential signal and the audio output differential signal and used for isolation, and a signal amplification module used for amplifying an audio signal. According to the technical scheme provided by the invention, the defects of complex circuit, higher cost, mutual crosstalk between equipment and poorer call effect in the prior art canbe effectively overcome.

Description

technical field [0001] The invention relates to subway communication, in particular to an isolated four-wire communication one-to-two circuit. Background technique [0002] Now subway travel is already the first choice of public transportation in many cities, especially in big cities. A large number of people pass through subway station halls and tunnels every day. Ensuring normal communication between employees on the subway can make the subway transportation system run more smoothly. [0003] Existing similar technologies: [0004] 2 / 4 conversion: the advantage is that it can realize full duplex and reduce a pair of signal lines; the disadvantage is that the circuit design is complex, the cost is very high, the call effect is poor, the circuit stability is not high, and it is difficult to achieve isolation between devices. [0005] Two-wire half-duplex: the advantage is that it reduces a pair of signal lines, the circuit is easy to implement, and the cost is low; the dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/78
CPCH04M1/78
Inventor 孙奎
Owner 泰弗思科技(安徽)有限公司
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