CN202798709U

CN202798709U - Stereo-sonic Bluetooth audio module

Info

Publication number: CN202798709U
Application number: CN 201220207159
Authority: CN
Inventors: 鲁霖
Original assignee: Shenzhen Xinzhongxin Technology Co Ltd
Current assignee: Shenzhen Xinzhongxin Technology Co Ltd
Priority date: 2012-05-09
Filing date: 2012-05-09
Publication date: 2013-03-13
Anticipated expiration: 2022-05-09

Abstract

Provided is a stereo-sonic Bluetooth audio module. Feet positions of the stereo-sonic Bluetooth audio module are composed of a volume increasing key, a volume decreasing key, an up-turning key, a down-turning key, a play key, a voltage output key, a NO.1 grounding key, a battery power supply terminal, a control key of a No.1 indicating lamp, a control key of a No.2 indicating lamp, a microphone signal input terminal, an R-channel audio output, a No.1 audio output common terminal, an L-channel audio output, a No.2 audio output common terminal, a No.2 grounding terminal, a signal output terminal, a signal reception terminal, a burning signal terminal and a mute key, wherein in a left foot position of the module, the volume increasing key, the volume decreasing key, the up-turning key, the down-turning key, the play key, the voltage output key, the NO.1 grounding key, the battery power supply terminal, the control key of the No.1 indicating lamp and the control key of the No.2 indicating lamp are installed from top to bottom, and in a right foot position of the module, the microphone signal input terminal, the R-channel audio output, the No.1 audio output common terminal, the L-channel audio output, the No.2 audio output common terminal, the No.2 grounding terminal, the signal output terminal, the signal reception terminal, the burning signal terminal and the mute key are installed from bottom to top.

Description

A kind of stereosonic blue tooth audio-frequency module

Technical field

The utility model relates to a kind of short-range wireless communication apparatus, refers specifically to a kind of stereosonic blue tooth audio-frequency module.

Technical background

Development along with radio network technique, Bluetooth technology also is applied on the wireless headset, and the user can exempt leading of earphone cord and mix, freely in every way easily conversation, present its function of bluetooth communication equipment is little, power consumption is high, cost is expensive, is not accepted by most people.

The utility model content

In order to solve the problem that exists in the above technology, the utility model proposes following technical solution.

Such as Fig. 1, the utility model is by module, the filter loop, charge circuit, radio-frequency receiving-transmitting loop and audio frequency amplifying return circuit form, the radio-frequency receiving-transmitting loop is comprised of radio frequency receiver and radiofrequency launcher, radio frequency receiver is electrically connected with external antenna respectively mutually with an end of radiofrequency launcher, the other end is electrically connected mutually with filter circuit respectively, filter circuit is by filter, resonance, transistor forms, one end of filter is electrically connected mutually with the radio-frequency receiving-transmitting loop, the other end is electrically connected mutually with the module loop, charge circuit is comprised of charging circuit and battery, and the audio frequency amplifying return circuit is comprised of power amplifier and loudspeaker.

Such as Fig. 3, described module is comprised of module pin position and integrated circuit.Module pin position adds key by volume, the volume down key, upturning key, downturning key, play button, the Voltage-output key, ground connection 1 key, the powered battery end, indicator light 1 operating key, indicator light 2 operating keys, the mark signal input part, right audio channel output, audio frequency output common port 1, the output of L channel audio frequency, audio frequency output common port 2, ground connection 2 ends, signal output part, signal receiving end, burning signal end and quiet key form, on pin position, the left side of module, be separately installed with from top to bottom volume and add key, the volume down key, upturning key, downturning key, play button, the Voltage-output key, ground connection 1 key, the powered battery end, indicator light 1 operating key, indicator light 2 operating keys; On pin position, the right of module, be separately installed with from top to bottom the output of mark signal input part, right audio channel, audio frequency and export public 1 end, the output of L channel audio frequency, audio frequency and export public 2 ends, ground connection 2 ends, signal output part, signal receiving end, burning signal end and quiet key.

Such as Fig. 2, the operation principle blue tooth wireless technology of Bluetooth technology is a kind of short range communication systems, is intended to replace the cable that connects portable equipment and/or stationary electronic devices.That the main feature of blue tooth wireless technology is is powerful, power consumption is low, with low cost.Many functions of core specification are optional function, to realize product diversity.The bluetooth core system comprises radio-frequency (RF) transceiver, base band and protocol stack.This system can provide the equipment connection service, and is supported in various types of other data of these exchanged between equipment.Bluetooth RF (physical layer) need not the 2.4GHz ISM wave band operation of licensing.System has adopted frequency hopping transceiver to prevent from disturbing and decline, and a plurality of FHSS (frequency-hopping spread spectrum) carrier wave is provided.Radio frequency operation has adopted the binary system frequency modulation(FM) that is shaped, and has reduced the transceiver complexity.The symbol rate is per second 1,000,000 symbols (Msps), supports the bit rate of per second 1 megabit (Mbps); For the data transfer rate that strengthens, can support 2 or total air bit rate of 3Mb/s.These patterns are called " basic rate " and " strengthening data transfer rate ".In the general operation situation, synchronously will share a physical radio channel to one group of equipment of common clock and hopping pattern.Provide the equipment of synchronous base to be called main equipment.All miscellaneous equipments are called from equipment.One group of synchronous equipment has formed a piconet (piconet) in this way.The citation form of blue tooth wireless technology communication that Here it is.Equipment in the piconet uses specific hopping pattern, and this figure is determined according to special algorithm by the specific fields in the bluetooth compliant address and main equipment clock.Basic hopping pattern is that 79 frequencies in the ISM wave band are carried out pseudorandom permutation.Hopping pattern can adjust to get rid of a part of frequency that jamming equipment uses.The AFH technology has been improved the coexisting state (when both coexist) of Bluetooth technology with static (non-frequency hopping) ISM system.Physical channel is the chronomere that is called time slot by subdivision.Data transmit enabling between the equipment of bluetooth with the form of packet in the time slot.If conditions permit can be distributed to a plurality of continuous slots a packet.When frequency hopping occurs in transmission or receive data bag.Bluetooth technology is by using time division duplex (TDD) scheme that the full duplex transmission effect is provided.There are a link, channel and relevant control protocol layer in the physical channel top.Above channel and the link layer level of physical channel is physical channel, physical link, logical transport, logical links and L2CAP channel.In physical channel, can form physical link between any two transmission equipments, but and bi-directional transfer of data bag.In piconet physical channel, which equipment can form physical link to has some restrictions.Each is from there being a physical link between equipment and main equipment.In the piconet from can directly not forming physical link between the equipment.Physical link can be used as the transport layer of one or more logical links, supports clean culture synchronous, asynchronous and isochronous communication amount and broadcast communication amount.The traffic on the logical links can be broken up on the physical link by the time slot that the scheduling feature of occupying in the explorer is distributed.Except user data, logical links also load the control protocol of base band and physical layer.Be LMP Link Manager Protocol (LMP).Vehicular equipment in the piconet has the logical transport towards asynchronous connection of acquiescence, is used for transmission LMP protocol signaling.Because historical reasons, this is called the acl logic transmission.All can create the acl logic transmission of acquiescence when having equipment to add piconet at every turn.Can create when needed the additional logic transmission with the transmitting synchronous data flow.The link management function adopts the operation of the equipment in the LMP control piconet, and the lower level (radio layer and baseband layer) of serving in the management framework is provided.The LMP agreement is only on the broadcasting logical transport with the acl logic transmission that loads on acquiescence and acquiescence.More than baseband layer, the L2CAP layer provides extraction based on channel for application and service.It can be carried out cutting apart of application data and recombinate, and carries out the multiplexing or demultiplexing of a plurality of channels by a sharing logical link.L2CAP has an agreement control channel, is carried in the acl logic transmission of acquiescence.The application data that is committed to the L2CAP agreement can be carried on any logical links of supporting the L2CAP agreement.

The beneficial effects of the utility model are that integrated level is high, volume is little, the peripheral cell that only needs to be equipped with a little just can be realized the function that it is powerful, can connect with any bluetooth audiogenic device that possesses A2DP and AVRCP transmission and remote control protocol, realize the wireless receiving of high-quality stereo audio stream, and can realize Long-distance Control to player of source of sound.

Description of drawings

Fig. 1 is structural framing figure of the present utility model.

Fig. 2 is circuit diagram of the present utility model.

Fig. 3 is module pin bitmap of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

The utility model is comprised of module 1, filter loop 2, charge circuit 3, radio-frequency receiving-transmitting loop 4 and audio frequency amplifying return circuit 5, radio-frequency receiving-transmitting loop 4 is comprised of radio frequency receiver and radiofrequency launcher, radio frequency receiver is connected with external antenna respectively with an end of radiofrequency launcher, and the other end is connected with filter circuit 2 respectively.Filter circuit 2 is comprised of filter, resonance, transistor, and an end of filter is connected with radio-frequency receiving-transmitting loop 4, and the other end is connected with central treatment loop 1.Charge circuit 3 is comprised of charging circuit and battery.Audio frequency amplifying return circuit 5 is comprised of power amplifier and loudspeaker.Described module is comprised of module pin position and integrated circuit, module pin position adds key 11 by volume, volume down key 12, upturning key 13, downturning key 14, play button 15, Voltage-output key 16, ground connection 1 key 17, powered battery end 18, indicator light 1 operating key 19, indicator light 2 operating keys 110, mark signal input part 111, right audio channel output 112, audio frequency is exported public 1 end 113, L channel audio frequency output 114, audio frequency is exported public 2 ends, 115 ground connection, 2 ends 116, signal output part 117, signal receiving end 118, burning signal end 119 and quiet key 120 form, these 17 pin positions are welded on respectively the right and left of module, are connected with corresponding loop mutually.

Claims

1. stereosonic blue tooth audio-frequency module, by the central processing unit loop, the filter loop, charge circuit, radio-frequency receiving-transmitting loop and audio frequency amplifying return circuit form, the radio-frequency receiving-transmitting loop is comprised of radio frequency receiver and radiofrequency launcher, it is characterized in that radio frequency receiver is connected with external antenna respectively with an end of radiofrequency launcher, the other end is connected with filter circuit respectively, filter circuit is by filter, resonance, transistor forms, one end of filter is connected with the radio-frequency receiving-transmitting loop, the other end is connected with central treatment loop, charge circuit is comprised of charging circuit and battery, and the audio frequency amplifying return circuit is comprised of power amplifier and loudspeaker.

2. a kind of stereosonic blue tooth audio-frequency module as claimed in claim 1, it is characterized in that module pin position adds key by volume, the volume down key, upturning key, downturning key, play button, the Voltage-output key, ground connection 1 key, the powered battery end, indicator light 1 operating key, indicator light 2 operating keys, the mark signal input part, right audio channel output, audio frequency is exported public 1 end, the output of L channel audio frequency, audio frequency is exported public 2 ends, ground connection 2 ends, signal output part, signal receiving end, burning signal end and quiet key form, on pin position, the left side of module, be separately installed with from top to bottom volume and add key, the volume down key, upturning key, downturning key, play button, the Voltage-output key, ground connection 1 key, the powered battery end, indicator light 1 operating key, indicator light 2 operating keys; On pin position, the right of module, be separately installed with from top to bottom the output of mark signal input part, right audio channel, audio frequency and export public 1 end, the output of L channel audio frequency, audio frequency and export public 2 ends, ground connection 2 ends, signal output part, signal receiving end, burning signal end and quiet key.