CN206181347U

CN206181347U - Wireless microphone circuit structure

Info

Publication number: CN206181347U
Application number: CN201621123167.8U
Authority: CN
Inventors: 万炼; 张思雷; 熊全海; 田义
Original assignee: Shenzhen Net Technology Co Ltd
Current assignee: Shenzhen Net Technology Co Ltd
Priority date: 2016-10-14
Filing date: 2016-10-14
Publication date: 2017-05-17
Anticipated expiration: 2026-10-14

Abstract

The utility model discloses a wireless microphone circuit structure, MIC acquisition circuit module, echo cancellation circuit module, signal converter circuit module and wireless receiving and dispatching circuit module including the order connection, and, the button control circuit module and the power management circuit module that still include the broadcast circuit module that is connected with echo cancellation circuit module, be connected with signal converter circuit module, wherein, MIC collection module is provided with 3 microphones, and the echo cancellation module adopts echo cancellation ZL38040 device to, wireless transceiver module adopts the wireless receiving and dispatching CC85XX device of 2.4G. The utility model discloses MIC pickup distance reaches 5m, greatly increased service environment area to 35 m2, echo cancellation, noise suppression function are perfect, realize pure voice and talkback, the improvement has improved transmission distance and stability in the reduction consumption simultaneously, reaches 12m, increase the duplex communication function, guarantee the clear transmission when both sides speak simultaneously.

Description

A kind of wireless microphone circuit structure

Technical field

This utility model is related to electronic technology field, more particularly to a kind of wireless microphone circuit structure.

Background technology

At present existing mike is divided into wired and wireless two types, and what is be most widely used is wire microphone, its It is easy to use, meet primary demand user and use.Vehicles Collected from Market trend has been partial to the higher wireless microphone of integrated level, does not receive Applied environment is limited.

There is line style mike to be mainly characterized by providing power supply and direct data exchange by USB interface, due to USB interface Electrical characteristic so that the overall power of mike is restricted（2.5W）, so as to speaker volume does less, can be only applied to Compared with the place of small area.There is the sound that line style mike gathers built-in MIC to carry out being transported to USB interface conversion chip after ADC Incoming PC ends, while the voice that PC ends export can be fed directly to loudspeaker by USB interface conversion chip play out, because internal Lack the function being further processed to voice data, then need the software for relying on PC ends to reprocess speech data, Such as echo cancellation, noise suppression, ambient sound remove, gain control.

Radio-type mike is mainly characterized by internal battery and can work independently, and wireless data transmission is not limited by PC end positions System, transmission range up to 8m, because internal battery is capable of achieving higher-wattage（4w）.Radio-type mike gathers built-in MIC Sound carries out ADC, and transferring to pronounciation processing chip carries out echo cancellation, noise suppression, removes ambient sound, AGC etc., then by being directed to The wireless conversion chips of 2.4G of voice data send, and now the wireless adapter at PC ends again turns the wireless signal that main frame sends Change voice data into and reach PC ends.

There is following defect in existing mike：

1st, MIC pickups distance is near

Current all kinds of mike audition distances are also easy to produce near-field effect probably in 3m, can be only applied to 20 ㎡ or so Scene.

2nd, loudspeaker sound is little

Current all kinds of micro-phone transducer sound are little, power supply and echo cancellation ability are limited to, when such as other side's sound is less Easily do not hear.

3rd, echo cancellation, noise suppression, sonication of uttering long and high-pitched sounds are not thorough enough

Echo cancellation is most intractable part, and elimination will thoroughly not allow other side to hear the echo of oneself, have a strong impact on Speech quality.

4th, the working time of wireless microphone and stand-by time are short

Working time is short mainly to have internal circuit power consumption control and battery performance to cause.

5th, wireless transmission distance is not remote enough

The great advantage of wireless microphone is to be wirelessly transferred, then distance is most important index, due to present various nothings The interference of line equipment, it will have a strong impact on transmission range and seriality.

6th, duplex communication is undesirable

Existing major part mike is simplex, it is impossible to meets both sides and talks simultaneously, is also easy to produce the noises such as reverberation.

Therefore, prior art existing defects, need to improve.

Utility model content

Technical problem to be solved in the utility model is：A kind of big pickup distance, noiselessness are provided, ensure both sides simultaneously The wireless microphone circuit structure of clear transmission when speaking.

The technical solution of the utility model is as follows：A kind of wireless microphone circuit structure, including the MIC collections being linked in sequence Circuit module, echo cancellation circuit coupling module, signal converter circuit module and wireless transceiver circuit module；Also, also include with The playing circuit module of echo cancellation circuit coupling module connection and the key control circuit mould of signal converter circuit module connection Block and electric power management circuit module；Wherein, MIC acquisition modules are provided with 3 mikes, and echo cancellation module adopts echo ZL38040 devices are eliminated, also, radio receiving transmitting module adopts 2.4G wireless receiving and dispatching CC85XX devices.

Above-mentioned technical proposal is applied to, in described wireless microphone circuit structure, signal converter circuit module is arranged There are the I2S revolving dies with digital-to-analogue conversion to intend AIC3204 devices and the simulation with Analog-digital Converter turn I2SAK5701 devices.

Each above-mentioned technical proposal is applied to, in described wireless microphone circuit structure, it is provided with outer for supporting The 3.5mm audio interface of public address equipment is connect, wherein, public address equipment is earphone or audio amplifier.

Each above-mentioned technical proposal is applied to, in described wireless microphone circuit structure, playing circuit module is provided with 3.3W power amplifier.

Each above-mentioned technical proposal is applied to, in described wireless microphone circuit structure, key control circuit module bag Include the MCU controllers of model PIC18F67J10, the volume being connected with MCU controllers respectively add button, volume down button, Mic mute button, loudspeaker mute button, MIC selection keys, power switch button, and it is corresponding with each button respectively Six dual-colored LED lamps.

Using such scheme, this utility model makes MIC pickup distances reach 5m by 3 mikes, and considerably increasing makes With environment area to 35 ㎡；The speaker gain of 3.3W power amplifiers is adjustable and max volume can match in excellence or beauty Mini-type audio equipment, 48K sampling rates Realize high-fidelity audio；The echo cancellation of echo cancellation ZL38040 devices, noise suppression function are perfect, realize pure voice pair Say；Built-in power management module, optimizes circuit power consumption and improves battery performance, lengthens working hours to 12 hours；Also, pass through 2.4G wireless receiving and dispatching CC85XX devices, improving is reducing power consumption while improving transmission range and stability, reaches 12m；Carry The I2S revolving dies of digital-to-analogue conversion intend AIC3204 devices and the simulation with Analog-digital Converter turns I2SAK5701 devices, Increase duplex communication function, it is ensured that clear transmission during Double talk.

Description of the drawings

Fig. 1 is integrated circuit structure chart of the present utility model；

Fig. 2 is the part circuit structure figure of echo cancellation circuit coupling module in this utility model；

Fig. 3 is the part circuit structure figure of key control circuit module in this utility model；

Fig. 4 is the part circuit structure figure of wireless transceiver circuit module in this utility model；

Fig. 5 is the layout of this utility model pcb board.

Specific embodiment

Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.

A kind of wireless microphone circuit structure is present embodiments provided, its overall circuit structure diagram is as shown in figure 1, wireless Microphone circuit structure includes MIC acquisition circuit modules, echo cancellation circuit coupling module, the signal converter circuit mould being linked in sequence Block and wireless transceiver circuit module, and playing circuit module and electric power management circuit module.

Wherein, MIC acquisition circuit modules manipulate 3 mikes, and it is respectively MIC1, MIC2 and MIC3,3 Mike's elegances With beam shaping microphone array technology, the sound of pickup certain angle scope is can be directed to, remove the noise on both sides, and will collection Audio data transmitting carry out the process that abates the noise to echo cancellation circuit module, i.e. echo cancellation ZL38040 devices, echo disappears Except ZL38040 devices suppress skill using world-class echo cancelltion technology, noise cancellation technology, chauvent's criterion technology, dynamic noise Art, can use in more noisy environment.

After echo cancellation ZL38040 devices abate the noise, voice data is by signal converter circuit module The AIC3204 devices that the I2S revolving dies of digital-to-analogue conversion are intended, wherein, I2S is integrated circuit built-in audio bus, AIC3204 devices Part is converted into voice data after analog data, then by remotely being sent with 2.4G wireless receiving and dispatching CC85XX devices, so as to The long-range transmission of speech data is realized, using 2.4G Radio Transmission Technologys, transmission range is farther, and transmission bandwidth is wider, transmission letter It is number more stable, and can be many with a band.

And 2.4G wireless receiving and dispatching CC85XX devices are received from long-range speech data by antenna, speech data is sent Turn the AK5701 devices of I2S to the simulation with Analog-digital Converter in signal converter circuit module, AK5701 devices are by language Sound data are simulated and turn digital signal, then after abating the noise by echo cancellation ZL38040 devices, are sent to 3.3W power amplifiers Loudspeaker are played out, and speaker sound is loud and clear, and fidelity factor is high.

Thus, the flow direction of speech data is divided into two parts, a part is delivered to from MIC gathered data Jing ZL38040 AIC3204 carries out gain amplification disposal.Another part is that the wireless change data that AIC3204 is obtained is given AK5701 and carries out ADC And sample rate conversion after again by ZL38040 process and DAC amplify give loudspeaker broadcasting.

The present embodiment wireless microphone circuit structure can be provided with for supporting that the 3.5mm audio frequency of external public address equipment connects Mouthful, wherein, public address equipment is earphone or audio amplifier.

Also, power management module can arrange usb charging inlets, power management module can carry lithium electricity, and battery can Using more than 12 hours.

Also, key control circuit module includes the MCU controllers of model PIC18F67J10, respectively with MCU controls The volume of device connection adds button, volume down button, mic mute button, loudspeaker mute button, MIC selection keys, power supply to open Close button, and six dual-colored LED lamps corresponding with each button respectively；MCU controllers can be received from IR remote controller Signal, it is decoded into corresponding order and is performed；By I2C Interface Controllers volume plus-minus, quiet etc.；Also, control The light on and off of power lights, each status indicator lamp；And controlling switch machine, inquiry electricity.

Thus, the configuration double-colored LED lamp of intelligence, the state of each function can be conveniently shown, such as electricity, volume, quiet, and can Intelligent prompt user charges, six press keys, and volume adds, volume down, mic mute, loudspeaker are quiet, MIC is selected, on and off switch, Six double-colored LED lamps, Blue Curacao indicates respectively different states.

Preferred embodiment of the present utility model is these are only, this utility model is not limited to, it is all in this practicality Any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model Within the scope of shield.

Claims

1. a kind of wireless microphone circuit structure, it is characterised in that：

Including the MIC acquisition circuit modules, echo cancellation circuit coupling module, signal converter circuit module being linked in sequence and wireless receipts Power Generation Road module；

Also, the playing circuit module for also including being connected with echo cancellation circuit coupling module and signal converter circuit module connect Key control circuit module and electric power management circuit module；

Wherein, MIC acquisition modules are provided with 3 mikes, and echo cancellation module adopts echo cancellation ZL38040 devices, also, Radio receiving transmitting module adopts 2.4G wireless receiving and dispatching CC85XX devices.

2. wireless microphone circuit structure according to claim 1, it is characterised in that：Signal converter circuit module is arranged There are the I2S revolving dies with digital-to-analogue conversion to intend AIC3204 devices and the simulation with Analog-digital Converter turn I2SAK5701 devices.

3. wireless microphone circuit structure according to claim 1, it is characterised in that：It is provided with for supporting external expansion The 3.5mm audio interface of sound equipment, wherein, public address equipment is earphone or audio amplifier.

4. wireless microphone circuit structure according to claim 1, it is characterised in that：Playing circuit module is provided with 3.3W Power amplifier.

5. wireless microphone circuit structure according to claim 1, it is characterised in that：Key control circuit module is included The MCU controllers of model PIC18F67J10, the volume being connected with MCU controllers respectively adds button, volume down button, Mike Wind mute button, loudspeaker mute button, MIC selection keys, power switch button, and six corresponding with each button respectively Dual-colored LED lamp.