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Audio input circuit used for GPS voice control system

An audio input and voice control technology, applied in transducer circuits, electrical components, sensors, etc., can solve the problems of easy interference and damage of audio input circuits, and achieve the effect of good circuit protection and strong anti-interference ability.

Inactive Publication Date: 2014-04-16
CHENGDU CONETON SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide an audio input circuit for the GPS voice control system, which is used to solve the problem that the audio input circuit is susceptible to interference and damage in the past

Method used

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  • Audio input circuit used for GPS voice control system

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Experimental program
Comparison scheme
Effect test

Embodiment

[0012] see figure 1 , the audio frequency input circuit that is used for GPS voice control system, comprises plus signal input line P and minus signal input line N, is provided with a capacitance of grounding on the plus signal input line P and minus signal input line N, described plus signal input There is also a capacitor connected in parallel between the line P and the subtraction signal input line N, and the grounded TVS tube is also connected to the said plus signal input line P, and the grounded TVS tube is also connected to the said subtraction signal input line N, said The outputs of the two diodes are connected to ground.

[0013] The capacitor connected in parallel between the plus signal input line P and the minus signal input line N is located between the capacitors on the plus signal input line P and the minus signal input line N that are grounded.

[0014] All capacitors in the audio input circuit are capacitors with a capacitance value of 33pF.

[0015] The TV...

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Abstract

The invention discloses an audio input circuit used for a GPS voice control system. The audio input circuit comprises a positive-signal input line P and a negative-signal input line N, the positive-signal input line P and the negative-signal input line N are respectively provided with a capacitor connected to the ground, a capacitor is further connected between the positive-signal input line P and the negative-signal input line N in parallel, a TVS connected to the ground is further connected to the positive-signal input line P, a TVS connected to the ground is also connected to the negative-signal input line N, and the output ends of the two TVSs are connected to the ground. The audio input circuit used for the GPS voice control system has the advantages of being high in anti-interference capacity and good in circuit protectiveness.

Description

technical field [0001] The invention relates to an audio circuit, in particular to an audio input circuit used in a GPS voice control system. Background technique [0002] GPS, global satellite positioning system, is a system that uses GPS positioning satellites to perform real-time positioning and navigation around the world. With the continuous development of information technology, GPS has penetrated into people's daily life, such as car GPS navigation, mobile phone GPS maps and other types of GPS emerge in an endless stream. Today's GPS not only has a wide variety, but also has more and more functions. As a smart An important system of GPS navigation, the GPS voice control system is more and more known and loved by people. The GPS voice control system operates the GPS through the user's voice, without keys, simple and convenient, and very practical. [0003] Because the GPS voice control system mainly operates and reports information through voice, the audio circuit a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
Inventor 陈晓琦
Owner CHENGDU CONETON SCI & TECH