CN203912158U - USB and audio multiplexing line and Bluetooth sound box circuit - Google Patents
USB and audio multiplexing line and Bluetooth sound box circuit Download PDFInfo
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- CN203912158U CN203912158U CN201420050767.0U CN201420050767U CN203912158U CN 203912158 U CN203912158 U CN 203912158U CN 201420050767 U CN201420050767 U CN 201420050767U CN 203912158 U CN203912158 U CN 203912158U
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Abstract
The utility model discloses a USB and audio multiplexing line and a Bluetooth sound box circuit. One end of the multiplexing line is provided with a USB-A type interface and a three-part earphone plug, and the other end of the multiplexing line is provided with a mini-USB type interface. The VCHG pin, DM pin, DP pin and GND pin of the USB-A type interface are respectively connected with the first pin, second pin, third pin and fifth pin of the mini-USB type interface. The second pin, third pin and fifth pin of the mini-USB type interface are respectively connected with the L pin, R pin and GND pin of the three-part earphone plug, or the second pin, third pin and fifth pin of the mini-USB type interface are respectively connected with the R pin, L pin and GND pin of the three-part earphone plug. Through the technical scheme of the utility model, the multiplexing line can achieve the transmission of a USB signal and the transmission of an audio signal, and is in favor of reducing the wiring between a cellphone, an MP3 and the like and sound box equipment.
Description
Technical field
The utility model relates to transmission line field, relates in particular to multiplexing line and the Baffle Box of Bluetooth circuit of a kind of USB and audio frequency.
Background technology
Bluetooth class music product is more and more on the market at present, and the little audio amplifier of bluetooth for example, because the features such as volume is little, easy to carry are subject to pursuing and liking of more and more users.And the little audio amplifier of this class bluetooth can comprise multiple interfaces conventionally, as LINE_IN interface of USB interface and audio transmission etc., need mix corresponding data wire (USB wiring, audio transmission line etc.) simultaneously.
Therefore,, for manufacturer, configuring many different transmission lines has increased cost; For user, too many wiring causes using inconvenient, affects user and experiences.
Utility model content
The purpose of this utility model is to propose multiplexing line and the Baffle Box of Bluetooth circuit of a kind of USB and audio frequency, can be when transmitting without USB, and use the DM, DP holding wire of USB interface data wire as the transmission line of audio frequency, realize the multiplexing of USB and audio frequency.
For reaching this object, the utility model by the following technical solutions:
The multiplexing line of a kind of USB and audio frequency, its one end is USB-A type interface and three-section earphone plug, the other end is mini-USB type interface, and the VCHG pin of described USB-A type interface, DM pin, DP pin, GND pin are connected with the 1st pin, the 2nd pin, the 3rd pin, the 5th pin of described mini-USB type interface respectively;
The 2nd pin of described mini-USB type interface, the 3rd pin, the 5th pin are connected with L pin, R pin, the GND pin of described three-section earphone plug respectively; Or,
The 2nd pin of described mini-USB type interface, the 3rd pin, the 5th pin are connected with R pin, L pin, the GND pin of described three-section earphone plug respectively.
A Baffle Box of Bluetooth circuit, comprises that this interface circuit comprises mini-USB base J201, Transient Voltage Suppressor T201, Transient Voltage Suppressor T202, Transient Voltage Suppressor T203 and capacitor C 201 for connecting the interface circuit of described multiplexing line; When described multiplexing line is plugged into Baffle Box of Bluetooth circuit, the pin 1-5 of the mini-USB base J201 of this interface circuit is electrically connected to the 1-5 pin of the mini-USB type interface of described multiplexing line respectively;
In this interface circuit, the pin 1 of mini-USB base J201 connects VCHG pin, Transient Voltage Suppressor T201 one end, capacitor C 201 one end, the Transient Voltage Suppressor T201 other end, the equal ground connection of capacitor C 201 other end;
The pin 2 of mini-USB base J201 connects COM2 pin, connects Transient Voltage Suppressor T203 one end, Transient Voltage Suppressor T203 other end ground connection;
The pin 3 of mini-USB base J201 connects COM1 pin, connects Transient Voltage Suppressor T202 one end, Transient Voltage Suppressor T202 other end ground connection;
The pin 4 of mini-USB base J201 is unsettled;
The pin 5-9 common ground of mini-USB base J201;
The pin 10,11 of mini-USB base J201 is all unsettled.
Wherein, described mini-USB base J201 is U06-8B05F251 base, and described capacitor C 201 is 0.1uF.
Wherein, the multiplex circuit that also comprises usb signal and audio signal, this multiplex circuit comprises negative pressure analog switch U201, resistance R 220, resistance R 221, resistance R 222, resistance R 223, capacitor C 206, capacitor C 207, capacitor C 233, magnetic bead L202 and magnetic bead L206;
Wherein, the pin 1 of negative pressure analog switch U201 connects USB_DM pin;
The pin 2 of negative pressure analog switch U201 connects capacitor C 233 one end, magnetic bead L206 one end, capacitor C 233 other end ground connection, and the magnetic bead L206 other end connects LINE_INR pin;
The pin 3 of negative pressure analog switch U201BCT4321 connects magnetic bead L202 one end, capacitor C 207 one end, capacitor C 207 other end ground connection, and the magnetic bead L202 other end connects LINE_INL pin;
Pin 4 ground connection of negative pressure analog switch U201;
Pin 5 contact resistance R223 one end of negative pressure analog switch U201, resistance R 223 other end ground connection; The pin 6 of negative pressure analog switch U201 connects COM2 pin;
The pin 7 of negative pressure analog switch U201 connects COM1 pin;
Pin 8 contact resistance R221 one end of negative pressure analog switch U201, resistance R 222 one end, resistance R 221 other end ground connection, resistance R 222 other ends connect VCHG pin;
Pin 9 contact resistance R220 one end of negative pressure analog switch U201, resistance R 220 other ends connect VBAT pin, capacitor C 206 one end, capacitor C 206 other end ground connection;
The pin 10 of negative pressure analog switch U201 connects USB_DP pin.
Wherein, described negative pressure analog switch U201 is BCT4321 analog switch, and described resistance R 220 is 100K Ω, resistance R 221 is 10K Ω, and resistance R 222 is 4.7K Ω, and resistance R 223 is 10K Ω, capacitor C 206 is 0.1uF, and capacitor C 207 is 27pF, and capacitor C 233 is 27pF.
The beneficial effects of the utility model are: by the DM of USB interface data wire, DP holding wire are carried out to the multiplexing left and right acoustic channels as audio frequency, when transmitting without USB, use these two holding wires as the transmission line of audio frequency, input or output audio, realize the multiplexing of USB and audio frequency, and USB charging, usb data transmission and audio signal transmission do not affect mutually.By a multiplexing line, both can transmit USB, again can transmission of audio signal, realized uniting two into one of USB line and tone frequency channel wire, be conducive to reduce the wiring between the terminals such as mobile phone, MP3 and sound-box device.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, the accompanying drawing the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structure chart of the multiplexing line of the USB that provides of the utility model embodiment mono-and audio frequency.
Fig. 2 is the wiring schematic diagram of the multiplexing line of the USB that provides of the utility model embodiment mono-and audio frequency.
Fig. 3 is the circuit diagram of the Baffle Box of Bluetooth circuit that provides of the utility model embodiment bis-.
Fig. 4 is the circuit diagram of the Baffle Box of Bluetooth circuit that provides of the utility model embodiment tri-.
Embodiment
Below in conjunction with accompanying drawing of the present utility model, technical scheme in the utility model embodiment is carried out to clear, complete description, obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiment.Embodiment based in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
Due to what be conventionally applied in usb data interface on audio amplifier, have VCHG, DM, DP, ID, several holding wires of GND, ID holding wire (i.e. the 4th pin) is general unsettled not to be connect.The utility model carries out the multiplexing left and right sound track signals line as audio frequency using holding wire DM, DP, make when not transmitting usb data, can use these two holding wires as the transmission line of audio frequency, input or output audio signal (specifically according to product demand and side circuit design), realize the multiplexing of USB and audio frequency, and USB charging, usb data transmission and audio signal transmission do not affect mutually.
Refer to Fig. 1-Fig. 2, multiplexing line of the present utility model one end is USB-A type interface and three-section earphone plug, can connect PC or other-end; The other end is mini-USB type interface, can connect sound-box device.The VCHG pin of this USB-A type interface, DM pin, DP pin, GND pin are connected with the 1st pin, the 2nd pin, the 3rd pin, the 5th pin of this mini-USB type interface respectively.VCHG is the power supply signal in usb signal, generally also undertakes the positive pole of charging signals simultaneously; DM refers to the negative terminal of the transmission data differential signals in usb signal; DP is the anode of the transmission data differential signals in usb signal.
As a preferred implementation of the present embodiment, the 2nd pin of described mini-USB type interface, the 3rd pin, the 5th pin are connected with L pin, R pin, the GND pin of described three-section earphone plug respectively.This multiplexing line gets final product the usb signal of transmitting cell-phone, MP3 or other-end, can transmit again left and right acoustic channels audio signal to external sound-box device.
As another preferred implementation of the present embodiment, also the 2nd pin of described mini-USB type interface, the 3rd pin, the 5th pin can be connected with R pin, L pin, the GND pin of described three-section earphone plug respectively.
The multiplexing line of the present embodiment both can be used as the input of voice data, also can be used as output, and while inputting as audio frequency, needed Systemon-board circuit and software to do corresponding configuration.When exporting as audio frequency, directly, by after the CODEC audio signal output of Systemon-board, process RC circuit etc. is received this multiplexing line, by this multiplexing line, can be transferred to the external equipment such as audio amplifier.
As shown in Figure 3, the utility model also provides a kind of embodiment of Baffle Box of Bluetooth circuit, and this Baffle Box of Bluetooth circuit comprises the interface circuit that can be connected with the multiplexing line of above-described embodiment.This interface circuit comprises mini-USB base J201, Transient Voltage Suppressor T201, Transient Voltage Suppressor T202, Transient Voltage Suppressor T203 and capacitor C 201; When described multiplexing line is plugged on Baffle Box of Bluetooth, the 1-5 pin of the mini-USB type interface of described multiplexing line is electrically connected to the pin 1-5 of the mini-USB base J201 of this interface circuit respectively.Preferably, the base of mini-USB described in the present embodiment J201 is U06-8B05F251 base, can also replace with other compatible mini-USB bases according to actual conditions.
In the present embodiment, the pin 1 of the mini-USB base J201 of this interface circuit connects VCHG pin, Transient Voltage Suppressor T201 one end, capacitor C 201 one end, the Transient Voltage Suppressor T201 other end, the equal ground connection of capacitor C 201 other end.In the present embodiment, capacitor C 201 is 0.1uF.
The pin 2 of mini-USB base J201 connects COM2 pin, connects Transient Voltage Suppressor T203 one end, Transient Voltage Suppressor T203 other end ground connection.
The pin 3 of mini-USB base J201 connects COM1 pin, connects Transient Voltage Suppressor T202 one end, Transient Voltage Suppressor T202 other end ground connection.
The pin 4 of mini-USB base J201 is unsettled.
The pin 5-9 common ground of mini-USB base J201.
The pin 10,11 of mini-USB base J201 is all unsettled.
It should be noted that, in the interface circuit of the present embodiment, COM2 pin, COM1 pin are the conventional pin in existing Baffle Box of Bluetooth circuit.Those skilled in the art can determine according to actual conditions the particular location of above-mentioned pin in Baffle Box of Bluetooth circuit.
As shown in Figure 4, Baffle Box of Bluetooth circuit of the present utility model also comprises the multiplex circuit of usb signal and audio signal, for realizing the multiplexing and input and output of usb signal and audio signal, selects.
The multiplex circuit of the present embodiment specifically comprises: negative pressure analog switch U201, resistance R 220, resistance R 221, resistance R 222, resistance R 223, capacitor C 206, capacitor C 207, capacitor C 233, magnetic bead L202 and magnetic bead L206.Preferably, the negative pressure analog switch U201 in the present embodiment is BCT4321 analog switch, can also replace with other compatible negative pressure analog switches according to actual conditions.
Wherein, the pin 1 of negative pressure analog switch U201 connects USB_DM pin.
The pin 2 of negative pressure analog switch U201 connects capacitor C 233 one end, magnetic bead L206 one end, capacitor C 233 other end ground connection, and the magnetic bead L206 other end connects LINE_INR pin.
The pin 3 of negative pressure analog switch U201 connects magnetic bead L202 one end, capacitor C 207 one end, capacitor C 207 other end ground connection, and the magnetic bead L202 other end connects LINE_INL pin.
Pin 4 ground connection of negative pressure analog switch U201.
Pin 5 contact resistance R223 one end of negative pressure analog switch U201, resistance R 223 other end ground connection; The pin 6 of negative pressure analog switch U201 connects COM2 pin.
The pin 7 of negative pressure analog switch U201 connects COM1 pin.
Pin 8 contact resistance R221 one end of negative pressure analog switch U201, resistance R 222 one end, resistance R 221 other end ground connection, resistance R 222 other ends connect VCHG pin.
Pin 9 contact resistance R220 one end of negative pressure analog switch U201BCT4321, resistance R 220 other ends connect VBAT pin, capacitor C 206 one end, capacitor C 206 other end ground connection.
The pin 10 of negative pressure analog switch U201BCT4321 connects USB_DP pin.
It should be noted that, in the multiplex circuit of the present embodiment, VCHG pin, VBAT pin, USB_DM pin, USB_DP pin, LINE_INR pin, COM2 pin and COM1 pin are the conventional pin in existing Baffle Box of Bluetooth circuit.Those skilled in the art can determine according to actual conditions the particular location of above-mentioned pin in Baffle Box of Bluetooth circuit.
Preferably, in the present embodiment, resistance R 220 is 100K Ω, and resistance R 221 is 10K Ω, and resistance R 222 is 4.7K Ω, and resistance R 223 is 10K Ω, and capacitor C 206 is 0.1uF, and capacitor C 207 is 27pF, and capacitor C 233 is 27pF.
By this multiplex circuit, when outer end access be USB time, existence due to VCHG voltage, make negative pressure analog switch U201 can be switched to usb communication path, when using as audio signal wire, owing to there is no VCHG voltage, analog switch acquiescence is switched to voice-frequency channel, makes the audio signal to be able to normal transmission.It should be noted that this multiplex mode, USB and audio interface can not be used simultaneously, otherwise can damage interface and machine.
For Baffle Box of Bluetooth, by multiplexing line of the present utility model, be mainly used for the input of audio frequency, the audio signal of the terminals such as outside mobile phone, computer or MP3 is outputed to Baffle Box of Bluetooth, by power amplifier and the loudspeaker amplification of volume of audio amplifier.Baffle Box of Bluetooth self can be used T card or bluetooth to connect mobile phone to play music, and namely audio amplifier self platform has audio frequency output, at this moment needs to determine by the selection of pattern the input of using CODEC output still to use external audio.Such as in default mode situation, analog switch is switched to CODEC output, to only have pattern is switched under LINE_IN pattern and just allows analog switch to be switched to external audio input channel, the switching of pattern can realize by forms such as key switches.
Above-described embodiment of the present utility model, by the DM of USB interface data wire, DP holding wire are carried out to the multiplexing left and right acoustic channels as audio frequency, when transmitting without USB, use these two holding wires as the transmission line of audio frequency, input or output audio, realize the multiplexing of USB and audio frequency, and USB charging, usb data transmission and audio signal transmission do not affect mutually.Simplicity of design, cost is lower, by a multiplexing line, both can transmit usb signal, again can transmission of audio signal, realized uniting two into one of USB line and tone frequency channel wire, be conducive to reduce the wiring between the terminals such as mobile phone, MP3 and sound-box device, promoted user's experience.
Finally it should be noted that: above embodiment is only for the technical solution of the utility model is described but not be limited, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can be modified or be equal to replacement the technical solution of the utility model, and these modifications or be equal to replacement and also can not make amended technical scheme depart from the spirit and scope of technical solutions of the utility model.
Claims (4)
1. the multiplexing line of a USB and audio frequency, it is characterized in that, its one end is USB-A type interface and three-section earphone plug, the other end is mini-USB type interface, and the VCHG pin of described USB-A type interface, DM pin, DP pin, GND pin are connected with the 1st pin, the 2nd pin, the 3rd pin, the 5th pin of described mini-USB type interface respectively;
The 2nd pin of described mini-USB type interface, the 3rd pin, the 5th pin are connected with L pin, R pin, the GND pin of described three-section earphone plug respectively; Or,
The 2nd pin of described mini-USB type interface, the 3rd pin, the 5th pin are connected with R pin, L pin, the GND pin of described three-section earphone plug respectively;
Holding wire DM, DP are carried out to the multiplexing left and right sound track signals line as audio frequency, make when not transmitting usb data, can use these two holding wires as the transmission line of audio frequency, input or output audio signal;
This multiplexing line can transmitting cell-phone, the usb signal of MP3, can transmit again left and right acoustic channels audio signal to external sound-box device.
2. a Baffle Box of Bluetooth circuit, it is characterized in that, comprise that this interface circuit comprises mini-USB base J201, Transient Voltage Suppressor T201, Transient Voltage Suppressor T202, Transient Voltage Suppressor T203 and capacitor C 201 for connecting the interface circuit of multiplexing line described in claim 1; When described multiplexing line is plugged into Baffle Box of Bluetooth circuit, the pin 1-5 of the mini-USB base J201 of this interface circuit is electrically connected to the 1-5 pin of the mini-USB type interface of described multiplexing line respectively;
In this interface circuit, the pin 1 of mini-USB base J201 connects VCHG pin, Transient Voltage Suppressor T201 one end, capacitor C 201 one end, the Transient Voltage Suppressor T201 other end, the equal ground connection of capacitor C 201 other end;
The pin 2 of mini-USB base J201 connects COM2 pin, connects Transient Voltage Suppressor T203 one end, Transient Voltage Suppressor T203 other end ground connection;
The pin 3 of mini-USB base J201 connects COM1 pin, connects Transient Voltage Suppressor T202 one end, Transient Voltage Suppressor T202 other end ground connection;
The pin 4 of mini-USB base J201 is unsettled;
The pin 5-9 common ground of mini-USB base J201;
The pin 10,11 of mini-USB base J201 is all unsettled;
The multiplex circuit that also comprises usb signal and audio signal, this multiplex circuit comprises negative pressure analog switch U201, resistance R 220, resistance R 221, resistance R 222, resistance R 223, capacitor C 206, capacitor C 207, capacitor C 233, magnetic bead L202 and magnetic bead L206;
Wherein, the pin 1 of negative pressure analog switch U201 connects USB_DM pin;
The pin 2 of negative pressure analog switch U201 connects capacitor C 233 one end, magnetic bead L206 one end, capacitor C 233 other end ground connection, and the magnetic bead L206 other end connects LINE_INR pin;
The pin 3 of negative pressure analog switch U201 connects magnetic bead L202 one end, capacitor C 207 one end, capacitor C 207 other end ground connection, and the magnetic bead L202 other end connects LINE_INL pin;
Pin 4 ground connection of negative pressure analog switch U201;
Pin 5 contact resistance R223 one end of negative pressure analog switch U201, resistance R 223 other end ground connection; The pin 6 of negative pressure analog switch U201 connects COM2 pin;
The pin 7 of negative pressure analog switch U201 connects COM1 pin;
Pin 8 contact resistance R221 one end of negative pressure analog switch U201, resistance R 222 one end, resistance R 221 other end ground connection, resistance R 222 other ends connect VCHG pin;
Pin 9 contact resistance R220 one end of negative pressure analog switch U201, resistance R 220 other ends connect VBAT pin, capacitor C 206 one end, capacitor C 206 other end ground connection;
The pin 10 of negative pressure analog switch U201 connects USB_DP pin.
3. Baffle Box of Bluetooth circuit according to claim 2, is characterized in that, described mini-USB base J201 is U06-8B05F251 base, and described capacitor C 201 is 0.1uF.
4. Baffle Box of Bluetooth circuit according to claim 2, it is characterized in that, described negative pressure analog switch U201 is BCT4321 analog switch, described resistance R 220 is 100K Ω, and resistance R 221 is 10K Ω, and resistance R 222 is 4.7K Ω, resistance R 223 is 10K Ω, capacitor C 206 is 0.1uF, and capacitor C 207 is 27pF, and capacitor C 233 is 27pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050767.0U CN203912158U (en) | 2014-01-26 | 2014-01-26 | USB and audio multiplexing line and Bluetooth sound box circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050767.0U CN203912158U (en) | 2014-01-26 | 2014-01-26 | USB and audio multiplexing line and Bluetooth sound box circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203912158U true CN203912158U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420050767.0U Expired - Fee Related CN203912158U (en) | 2014-01-26 | 2014-01-26 | USB and audio multiplexing line and Bluetooth sound box circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203912158U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108632703A (en) * | 2017-03-22 | 2018-10-09 | 深圳市三诺声智联股份有限公司 | A kind of bluetooth headset sound box system and speaker |
| CN111247781A (en) * | 2017-10-13 | 2020-06-05 | 深圳传音通讯有限公司 | Audio circuit and audio playback system based on intelligent terminal |
-
2014
- 2014-01-26 CN CN201420050767.0U patent/CN203912158U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108632703A (en) * | 2017-03-22 | 2018-10-09 | 深圳市三诺声智联股份有限公司 | A kind of bluetooth headset sound box system and speaker |
| CN111247781A (en) * | 2017-10-13 | 2020-06-05 | 深圳传音通讯有限公司 | Audio circuit and audio playback system based on intelligent terminal |
| CN111247781B (en) * | 2017-10-13 | 2022-05-20 | 深圳传音通讯有限公司 | Audio circuit and audio playing system based on intelligent terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI ZHUOYI TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHANGHAI TYD ELECTRONIC TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 200233 Guiping Road, Xuhui District, No. 391, building 20, floor 3, Patentee after: Shanghai Zhuo Yi Science and Technology Co., Ltd. Address before: 200233 Shanghai City, Xuhui District Guiping road B new Caohejing International Business Center No. 391 20 floor Patentee before: Shanghai TYD Electronic Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20180126 |