CN103731776A - Audio circuit used for GPS voice control system - Google Patents
Audio circuit used for GPS voice control system Download PDFInfo
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- CN103731776A CN103731776A CN201210388011.2A CN201210388011A CN103731776A CN 103731776 A CN103731776 A CN 103731776A CN 201210388011 A CN201210388011 A CN 201210388011A CN 103731776 A CN103731776 A CN 103731776A
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Abstract
The invention discloses an audio circuit used for a GPS voice control system. The audio circuit comprises an audio input circuit M and an audio output circuit E. The audio input circuit M comprises a positive-signal input line MP and a negative-signal input line MN, the audio output circuit E comprises a positive-signal input line EP and a negative-signal input line EN, the positive-signal input line MP and the negative-signal input line MN are respectively provided with a capacitor connected to the ground, a capacitor is further connected between the positive-signal input line MP and the negative-signal input line MN in parallel, a TVS connected to the ground is further connected to the positive-signal input line MP, a TVS connected to the ground is also connected to the negative-signal input line MN, the outlet ends of the two TVSs are connected to the ground, and the connecting relations and use components of the positive-signal input line EP and the negative-signal input line EN are identical with the connecting relations and the use components of the positive-signal input line MP and the negative-signal input line MN. The audio circuit has the advantages of being high in anti-interference capacity and good in circuit protectiveness.
Description
Technical field
The present invention relates to a kind of voicefrequency circuit, specifically refer to a kind of voicefrequency circuit for GPS speech control system.
Background technology
GPS, GPS (Global Position System), utilizes GPS position location satellite, the system that positions in real time in the world, navigates.Development along with information technology, GPS has been deep in daily life, as the GPS of the kinds such as car borne GPS navigation, cellphone GPS map emerges in an endless stream, present GPS is not only of a great variety, and function is also more come also many, an important system as intelligent GPS navigation, GPS speech control system is more and more known and likes by people, and GPS speech control system is by user speech, GPS to be operated, without button, simple and convenient, practicality is very strong.
Because GPS speech control system is mainly to operate and report information by voice, so the voicefrequency circuit as GPS speech control system just seems particularly important, voicefrequency circuit has comprised input voicefrequency circuit and output audio circuit, the input and output that the two completes respectively sound, reach the transmitting effect of sound.When using GPS voice system, a maximum antijamming capability that problem is exactly voicefrequency circuit, if the poor anti jamming capability of voicefrequency circuit will directly cause voice system to occur the situations such as noise, speech recognition are inaccurate.The present invention is directed to above problem, proposed a kind of novel voicefrequency circuit, the anti-interference of voicefrequency circuit is strengthened, simultaneously also can better protective circuit.
Summary of the invention
Problem to be solved by this invention is to provide a kind of voicefrequency circuit for GPS speech control system, for solving voicefrequency circuit in the past, is easily disturbed and flimsy problem.
Technical scheme provided by the invention is: for the voicefrequency circuit of GPS speech control system, comprise audio input circuit M and audio output circuit E, audio input circuit M comprises plus signal input line MP and cut signal input line MN, audio output circuit E comprises plus signal input line EP and cut signal input line EN, it is characterized in that: the electric capacity that is equipped with a ground connection on described plus signal input line MP and cut signal input line MN, between described plus signal input line MP and cut signal input line MN, be also parallel with an electric capacity, on described plus signal input line MP, be also connected with the TVS pipe of ground connection, described cut signal input line MN is connected with the TVS pipe of ground connection equally, the port of export ground connection of two described diodes, the annexation of described plus signal input line EP and cut signal input line EN is all identical with cut signal input line MN with plus signal input line MP with components and parts used.
Between described plus signal input line MP and cut signal input line MN between the electric capacity of electric capacity ground connection on plus signal input line P and cut signal input line N in parallel, between described plus signal input line EP and cut signal input line EN, electric capacity in parallel is equally on plus signal input line P and cut signal input line N between the electric capacity of ground connection.Between plus signal input line and cut signal input line, electric capacity in parallel can better be eliminated the poor interference of touching, and the electric capacity of ground connection can better be eliminated common mode disturbances in plus signal input line and cut signal input line, antijamming capability, the practicality of whole like this voicefrequency circuit strengthen greatly.
All electric capacity in described voicefrequency circuit all adopt the electric capacity of 33pF capacitance.Different capacitances, the electric capacity of material, resonance frequency is different, is used for filtering the interference of characteristic frequency, need to select the electric capacity of suitable resonance frequency.The frequency of the resonance point of the electric capacity of 33pF can better be eliminated interference signal.
All TVS pipes in described voicefrequency circuit all adopt unidirectional TVS pipe.TVS pipe is a kind of high-effect protection device of diode form; when the two poles of the earth of TVS diode are subject to reverse transient state high energy impact events; it can be with the speed of 10-12 second-time; the high impedance of its two interpolar is become to Low ESR; the surge power of absorption up to thousands of watts; effectively protect precision components in electronic circuit to avoid the damage of various surge pulses, avoid static to damage circuit and components and parts, fabulous protection the components and parts on circuit and circuit.
The invention has the advantages that: this voicefrequency circuit for GPS speech control system of the present invention, has the advantages that antijamming capability is strong, circuit protection is good.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Embodiment 1
Referring to Fig. 1, voicefrequency circuit for GPS speech control system, comprise audio input circuit M and audio output circuit E, audio input circuit M comprises plus signal input line MP and cut signal input line MN, audio output circuit E comprises plus signal input line EP and cut signal input line EN, it is characterized in that: the electric capacity that is equipped with a ground connection on described plus signal input line MP and cut signal input line MN, between described plus signal input line MP and cut signal input line MN, be also parallel with an electric capacity, on described plus signal input line MP, be also connected with the TVS pipe of ground connection, described cut signal input line MN is connected with the TVS pipe of ground connection equally, the port of export ground connection of two described diodes, the annexation of described plus signal input line EP and cut signal input line EN is all identical with cut signal input line MN with plus signal input line MP with components and parts used.
Between above-mentioned plus signal input line MP and cut signal input line MN between the electric capacity of electric capacity ground connection on plus signal input line P and cut signal input line N in parallel, between described plus signal input line EP and cut signal input line EN, electric capacity in parallel is equally on plus signal input line P and cut signal input line N between the electric capacity of ground connection.
All electric capacity in above-mentioned voicefrequency circuit all adopt the electric capacity of 33pF capacitance.
All TVS pipes in above-mentioned voicefrequency circuit all adopt unidirectional TVS pipe.
In use, due to adding of electric capacity, the antijamming capability of whole voicefrequency circuit is strengthened, in the process of signal transmission, can not be subject to outer signals and disturb, can better audio frequency apparatus be inputted or be outputed to signal.
Make the adding of TVS pipe the antistatic effect of whole circuit strengthen, voicefrequency circuit can not be subject to electrostatic interaction and damage to some extent, fabulous protection circuit.
Can well realize the present invention as mentioned above.
Claims (4)
1. for the voicefrequency circuit of GPS speech control system, comprise audio input circuit M and audio output circuit E, audio input circuit M comprises plus signal input line MP and cut signal input line MN, audio output circuit E comprises plus signal input line EP and cut signal input line EN, it is characterized in that: the electric capacity that is equipped with a ground connection on described plus signal input line MP and cut signal input line MN, between described plus signal input line MP and cut signal input line MN, be also parallel with an electric capacity, on described plus signal input line MP, be also connected with the TVS pipe of ground connection, described cut signal input line MN is connected with the TVS pipe of ground connection equally, the port of export ground connection of two described diodes, the annexation of described plus signal input line EP and cut signal input line EN is all identical with cut signal input line MN with plus signal input line MP with components and parts used.
2. the voicefrequency circuit for GPS speech control system according to claim 1, it is characterized in that: between described plus signal input line MP and cut signal input line MN between the electric capacity of electric capacity ground connection on plus signal input line P and cut signal input line N in parallel, between described plus signal input line EP and cut signal input line EN, electric capacity in parallel is equally on plus signal input line P and cut signal input line N between the electric capacity of ground connection.
3. the voicefrequency circuit for GPS speech control system according to claim 1, is characterized in that: all electric capacity in described voicefrequency circuit all adopt the electric capacity of 33pF capacitance.
4. the voicefrequency circuit for GPS speech control system according to claim 1, is characterized in that: all TVS pipes in described voicefrequency circuit all adopt unidirectional TVS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210388011.2A CN103731776A (en) | 2012-10-15 | 2012-10-15 | Audio circuit used for GPS voice control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210388011.2A CN103731776A (en) | 2012-10-15 | 2012-10-15 | Audio circuit used for GPS voice control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103731776A true CN103731776A (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210388011.2A Pending CN103731776A (en) | 2012-10-15 | 2012-10-15 | Audio circuit used for GPS voice control system |
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| CN (1) | CN103731776A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016119487A1 (en) * | 2015-01-30 | 2016-08-04 | 中兴通讯股份有限公司 | Audio input circuit and electronic terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2896303Y (en) * | 2005-04-22 | 2007-05-02 | 李铭浩 | GPS vehicle carried terminal machine |
| CN201717940U (en) * | 2010-06-23 | 2011-01-19 | 宁波现代萨际通移动电话有限公司 | Mobile phone provided with hand-free music playing function |
| CN201984163U (en) * | 2011-03-17 | 2011-09-21 | 生茂光电科技股份有限公司 | Policeman positioning circuit |
| CN202799095U (en) * | 2012-10-15 | 2013-03-13 | 成都众易通科技有限公司 | Audio circuit for GPS voice control system |
-
2012
- 2012-10-15 CN CN201210388011.2A patent/CN103731776A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2896303Y (en) * | 2005-04-22 | 2007-05-02 | 李铭浩 | GPS vehicle carried terminal machine |
| CN201717940U (en) * | 2010-06-23 | 2011-01-19 | 宁波现代萨际通移动电话有限公司 | Mobile phone provided with hand-free music playing function |
| CN201984163U (en) * | 2011-03-17 | 2011-09-21 | 生茂光电科技股份有限公司 | Policeman positioning circuit |
| CN202799095U (en) * | 2012-10-15 | 2013-03-13 | 成都众易通科技有限公司 | Audio circuit for GPS voice control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016119487A1 (en) * | 2015-01-30 | 2016-08-04 | 中兴通讯股份有限公司 | Audio input circuit and electronic terminal |
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Application publication date: 20140416 |