An audio power amplifier for urban rail transit system

An urban rail transit and audio power technology, applied in the field of audio power amplifiers, can solve the problems of high cost and unguaranteed sound quality effect, and achieve the effects of low cost, easy promotion and use, and simple structure

Inactive Publication Date: 2016-01-27
ANNAX SUZHOU RAIL SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Urban Mass Transit System (Urban Mass Transit System), referred to as Urban Rail System (Urban Rail System) is an important part of the future transportation system. The voice system on the train is a part of the function used by the crew and passengers. If the voice system is not perfect It will give people a greater sense of discomfort, wherein the performance of the audio power amplifier in the voice system directly determines the quality of the voice system, and the existing audio power amplifiers often have a higher cost when the sound quality is better, and the cost In the lower case, the sound quality effect cannot be guaranteed

Method used

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  • An audio power amplifier for urban rail transit system
  • An audio power amplifier for urban rail transit system

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Embodiment Construction

[0016] The technical implementation process of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] see figure 1 Shown, a kind of audio frequency power amplifier that is used for urban mass transit system comprises a loudspeaker 8, and audio frequency input module 9, and the output terminal of described audio frequency input module 9 is connected with a grounding adjustable resistor Rf for adjusting the volume , the adjustable resistor Rf is connected to the positive input terminal of an amplifier U1, the inverting input terminal of the amplifier U1 is connected to the emitter of a triode Q1 through a fifth resistor R5, and the collector of the triode Q1 is connected to the power supply , the base is grounded through the second voltage dividing resistor R2, the first voltage dividing resistor R1 is connected across the collector and the base, and the positive input terminal and the inverting input termina...

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Abstract

The invention discloses an audio power amplifier used for an urban rail traffic system, which comprises a loudspeaker and an audio input module, wherein the output terminal of the audio input module is connected with a grounded adjustable resistor used for regulating volume, and the adjustable resistor is connected with the positive input terminal of an amplifier. The inverting input terminal of the amplifier is connected with the emitter of a triode through a fifth resistor, and the collector of the triode is connected with a power supply. The base of the triode is grounded through a second voltage dividing resistor, and a first voltage dividing resistor is bridged between the collector and the base. The positive input terminal and the inverting input terminal of the amplifier are bridged with a seventh resistor, and the output terminal and the positive input terminal of the amplifier are bridged with a feedback resistor. The output terminal of the amplifier is connected with the loudspeaker through a polar capacitor. The audio power amplifier has the advantages of simple structure and low cost, can effectively inhibit crossover distortion, ensures a better sound quality effect, and is easily promoted and used.

Description

technical field [0001] The invention belongs to the technical field of urban rail transit, and in particular relates to an audio power amplifier used in an urban rail transit system. Background technique [0002] Urban Mass Transit System (Urban Mass Transit System), referred to as Urban Rail System (Urban Rail System) is an important part of the future transportation system. The voice system on the train is a part of the function used by the crew and passengers. If the voice system is not perfect It will give people a greater sense of discomfort, wherein the performance of the audio power amplifier in the voice system directly determines the quality of the voice system, and the existing audio power amplifiers often have a higher cost when the sound quality is better, and the cost In the lower case, the sound quality effect cannot be guaranteed. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the object of the present invention i...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H03F3/20
Inventor艾培德
OwnerANNAX SUZHOU RAIL SYST