CN204305342U - A kind of audio signal switches the device of input - Google Patents
A kind of audio signal switches the device of input Download PDFInfo
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- CN204305342U CN204305342U CN201420839884.5U CN201420839884U CN204305342U CN 204305342 U CN204305342 U CN 204305342U CN 201420839884 U CN201420839884 U CN 201420839884U CN 204305342 U CN204305342 U CN 204305342U
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Abstract
The utility model belongs to audio frequency control technical field, specifically, relates to the device that a kind of audio signal switches input.Wherein, device comprises: balanced differential source, terminal and change over adapter; When change over adapter has extraneous non-equilibrium coaxial signal joint to insert, positive signal end and the terminal positive signal end of balanced differential source disconnect, inversion signal termination ground short circuit, the extraneous signal end of non-equilibrium coaxial signal joint is connected with the positive signal end of terminal, realizes signal switching.The utility model is avoided designing change-over circuit, adopts complete on-off mode, and signal switching is convenient.
Description
Technical field
The utility model belongs to audio frequency control technical field, specifically, relates to the device that a kind of audio signal switches input.
Background technology
Current most electronic product has been the audio frequency small-signal in totally digitilized circuit, particularly audio product all, the most easily disturbs by data signal, and therefore, audio frequency small-signal, when designing the input of anti-interference audio frequency, is all designed to balanced differential mode by major part; And when balanced differential Signal transmissions is to terminal, need design differential conversion circuit, differential signal is changed into non-equilibrium coaxial signal; The non-equilibrium coaxial signal that terminal sends in other sources of reception is also convenient in such design, easily switches; But a differential conversion circuit is set in terminal, the antijamming capability of small-signal can be had influence on, cause distorted signals.
Utility model content
The utility model is for solving in prior art, audio frequency small-signal, after differential conversion circuit conversion, to be easily interfered in terminal, the problem of distortion, provides a kind of audio signal to switch the device of input, this device is not changed audio frequency differential signal, improves signal antijamming capability; And be convenient to balanced differential signal and non-equilibrium coaxial signal switching input simultaneously.
Audio signal switches a device for input, comprising:
Balanced differential source, input difference audio signal;
Terminal, for received audio signal;
Change over adapter, comprises positive terminal, inverting terminal, intermediate terminal;
The inversion signal end of balanced differential source is all connected with inverting terminal with the inversion signal end of terminal,
The positive signal end of balanced differential source is connected with intermediate terminal, and the positive signal end of terminal is connected with positive terminal sub-connection, and intermediate terminal and positive terminal overlap;
The difference audio signal of balanced differential source input transfers to terminal by change over adapter;
When change over adapter has extraneous non-equilibrium coaxial signal joint to insert, inverting terminal is connected with the earth terminal of the non-equilibrium coaxial signal joint in the external world, the inversion signal end of balanced differential source and the equal ground connection of inversion signal end of terminal, intermediate terminal is separated with positive terminal, positive signal end and the terminal positive signal end of balanced differential source disconnect, and the signal end of extraneous non-equilibrium coaxial signal joint is connected with the positive signal end of terminal by positive terminal.
Extraneous non-equilibrium coaxial signal joint can be the audio connector of shaft-like.
Non-equilibrium coaxial signal refers to the audio signal that shaft-like audio connector inputs.
Wherein, the positive signal end of balanced differential source and inversion signal end are all connected with output coupling capacitor and current-limiting resistance.
Wherein, the normal phase input end of terminal and inverting input are all connected with input coupling capacitance and input resistance.
The beneficial effect that the utility model obtains is:
The positive inversion signal of the utility model differential signal from source to terminal complete equipilibrium, without any active conversion.
The utility model is not used balance and is turned nonequilibrium difference channel.
The utility model balanced differential signal be adopt on-off mode to switch completely with non-equilibrium coaxial signal.
The utility model can not change the antijamming capability of balanced differential signal, also has the interface of non-equilibrium coaxial input simultaneously.
Accompanying drawing explanation
Fig. 1 is formation schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described further.
Embodiment 1: see Fig. 1; Audio signal switches a device for input, comprising: balanced differential source, input difference audio signal; Difference audio signal comprises L channel difference audio signal L+ and L-, R channel difference audio signal R+ and R-; Positive phase signals R+, the L+ of difference audio signal transfer to the intermediate terminal 6,7 of change over adapter respectively by tone frequency channel wire, because intermediate terminal 6,7 overlaps conducting with positive terminal 3,2 respectively, positive phase signals R+, L+ transfer to positive signal end R+, L+ of terminal again by tone frequency channel wire; Inversion signal R-, L-of difference audio signal transfer to the inverting terminal 4,5 of change over adapter respectively by tone frequency channel wire, then are transferred to inversion signal end R-, L-of terminal by tone frequency channel wire; Thus realize the transmission of difference audio signal.
When there being extraneous non-equilibrium coaxial signal joint JK1 to insert, the inverting terminal of change over adapter is connected with the earth terminal of the non-equilibrium coaxial signal joint in the external world, the now inversion signal end of balanced differential source and the equal ground connection of inversion signal end of terminal, intermediate terminal is separated with positive terminal under the effect of change over adapter, positive signal end and the terminal positive signal end of balanced differential source disconnect, the signal end of extraneous non-equilibrium coaxial signal joint is connected with the positive signal end of terminal by positive terminal simultaneously, realizes the switching of signal.
Intermediate terminal 6,7 is when overlapping conducting with positive terminal 3,2, bonding jumper can be set between intermediate terminal and corresponding positive terminal, the top of positive terminal is provided with the inclined tab that coaxial signal joint non-equilibrium with the external world matches, when the non-equilibrium coaxial signal joint in the external world inserts, stir inclined tab, positive terminal is subjected to displacement, and bonding jumper is separated with positive terminal, and then realizes intermediate terminal and realize being separated with positive terminal.Other frame mode can certainly be adopted to realize being separated between intermediate terminal with positive terminal.
In order to make envelope eapsulotomy, positive signal end and the inversion signal end of balanced differential source are all connected with output coupling capacitor and current-limiting resistance.The normal phase input end of terminal and inverting input are all connected with input coupling capacitance and input resistance.
The utility model also relates to a kind of method that audio signal switches input, the method comprises: balanced differential source input difference audio signal, difference audio signal transfers to terminal by change over adapter, when there being extraneous non-equilibrium coaxial signal joint to be connected with change over adapter, difference audio signal is cut off, and extraneous non-equilibrium coaxial signal joint is to terminal inputting earthquake waves coaxial signal.
Balanced differential source can be audio frequency generation module, as the audio-frequency module in bluetooth earphone, wireless sound box etc., in order to produce difference audio signal, the difference audio signal transmission produced is to voice frequency terminal (terminal can be power amplifier, sound equipment etc.), when there being other audio-source incision, by COBBAIF (i.e. change over adapter) incision, and by audio connector inputting earthquake waves coaxial signal.This method directly adopts change over adapter to switch, and relative to prior art without the need to arranging extra differential conversion circuit, has good antijamming capability, has non-equilibrium coaxial signal input interface simultaneously.Easy switching.
Further, when there being extraneous non-equilibrium coaxial signal joint to be connected with change over adapter, the inversion signal end ground connection of balanced differential source, the inversion signal end ground connection of terminal; The positive signal end of balanced differential source and the positive signal end of terminal disconnect, and the extraneous signal end of non-equilibrium coaxial signal joint is connected with the positive signal end of terminal, realizes signal switching.
The technical program is when implementing to switch, the inversion signal end of balanced differential source is connected with the earth terminal of the non-equilibrium coaxial signal joint in the external world, realize balanced differential signal inversion end and ground short circuit, the i.e. inversion signal end ground connection of balanced differential source, the inversion signal end ground connection of terminal, make the inversion signal end of terminal be 0 input, positive terminal and difference source disconnect, the extraneous signal end of non-equilibrium coaxial signal joint is connected with the positive signal end of terminal simultaneously, realizes the switching of signal.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (3)
1. audio signal switches a device for input, it is characterized in that: comprising:
Balanced differential source, input difference audio signal;
Terminal, for received audio signal;
Change over adapter, comprises positive terminal, inverting terminal, intermediate terminal;
The inversion signal end of balanced differential source is all connected with inverting terminal with the inversion signal end of terminal,
The positive signal end of balanced differential source is connected with intermediate terminal, and the positive signal end of terminal is connected with positive terminal sub-connection, and intermediate terminal and positive terminal overlap;
The difference audio signal of balanced differential source input transfers to terminal by change over adapter;
When change over adapter has extraneous non-equilibrium coaxial signal joint to insert, inverting terminal is connected with the earth terminal of the non-equilibrium coaxial signal joint in the external world, the inversion signal end of balanced differential source and the equal ground connection of inversion signal end of terminal, intermediate terminal is separated with positive terminal, positive signal end and the terminal positive signal end of balanced differential source disconnect, and the signal end of extraneous non-equilibrium coaxial signal joint is connected with the positive signal end of terminal by positive terminal.
2. a kind of audio signal according to claim 1 switches the device of input, it is characterized in that: positive signal end and the inversion signal end of balanced differential source are all connected with output coupling capacitor and current-limiting resistance.
3. a kind of audio signal according to claim 1 switches the device of input, it is characterized in that: the normal phase input end of terminal and inverting input are all connected with input coupling capacitance and input resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420839884.5U CN204305342U (en) | 2014-12-26 | 2014-12-26 | A kind of audio signal switches the device of input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420839884.5U CN204305342U (en) | 2014-12-26 | 2014-12-26 | A kind of audio signal switches the device of input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204305342U true CN204305342U (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420839884.5U Active CN204305342U (en) | 2014-12-26 | 2014-12-26 | A kind of audio signal switches the device of input |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204305342U (en) |
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2014
- 2014-12-26 CN CN201420839884.5U patent/CN204305342U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Industrial Road, Songshan Lake high tech Industrial Development Zone, Guangdong city of Dongguan province No. 6 523808 1 5 floor Patentee after: Jiahe intelligent Polytron Technologies Inc Address before: Industrial Road, Songshan Lake high tech Industrial Development Zone, Guangdong city of Dongguan province No. 6 523808 1 5 floor Patentee before: COSONIC ACOUSTIC TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Industrial Road, Songshan Lake high tech Industrial Development Zone, Guangdong city of Dongguan province No. 6 523808 1 5 floor Patentee after: Jiahe intelligent Polytron Technologies Inc Address before: Industrial Road, Songshan Lake high tech Industrial Development Zone, Guangdong city of Dongguan province No. 6 523808 1 5 floor Patentee before: COSONIC ACOUSTIC TECHNOLOGY CO., LTD. |