CN204288815U - Network audio playback equipment - Google Patents

Network audio playback equipment Download PDF

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Publication number
CN204288815U
CN204288815U CN201420798292.3U CN201420798292U CN204288815U CN 204288815 U CN204288815 U CN 204288815U CN 201420798292 U CN201420798292 U CN 201420798292U CN 204288815 U CN204288815 U CN 204288815U
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China
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pin
connects
electric capacity
resistance
chip
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CN201420798292.3U
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赵凡
杨孟洲
占焱清
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Hangzhou grandwell Polytron Technologies Inc
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HANGZHOU LINKER DIGITAL TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a kind of network audio playback equipment, aim to provide the network audio player that a kind of product content source is wide, be easy to Long-distance Control.It comprises controller circuitry, audio control circuit, network interface circuit, indicator light circuit, audio interface circuit, key circuit and power circuit, described audio control circuit, network interface circuit, indicator light circuit are all connected with controller circuitry with key circuit, and described audio interface circuit is connected with audio control circuit; Network interface circuit also comprises WIFI module.Controller circuitry obtains audio files by network interface circuit, then by outputting to audio amplifier from audio interface circuit after audio control circuit process or earphone is play.Network interface circuit have greatly expanded the source of product, and can realize Long-distance Control, is convenient to user and helps when going out household to open, closing broadcasting or customization, switching program.This programme is applicable to allly can connect Internet network, has the occasion of music demand.

Description

Network audio playback equipment
Technical field
The utility model relates to field of audio play, especially relates to a kind of network audio playback equipment being convenient to Long-distance Control.
Background technology
Current traditional audio amplifier is connected with power amplifier, apparatus such as computer by cable, the audio file on the physical storage mediums such as play CD, hard disk, SD card, thus bring the enjoyment of vocal music amusement to audience.Over recent year, along with Proximity Wireless Transfer Technology, as bluetooth, the appearance of WIFI, Baffle Box of Bluetooth, WIFI audio amplifier is along with entering popular life, if application publication number is the patent documentation of CN102768849A, title is the music playing system based on the transmission of ANTENN AUDIO data, it comprises transmitting terminal, receiving end and audio amplifier, transmitting terminal is run on the music player based on Android exploitation on mobile terminal device, this mobile terminal is provided with the android system supporting WIFI function, music player self-defined bottom decoding storehouse, decoded pulse modulation data is transmitted by WIFI network, mobile terminal is smart mobile phone or panel computer.Receiving end comprises main control unit, WIFI network unit and digital-to-analog conversion output unit, and main control unit completes Central Control Function in conjunction with peripheral storage device; WIFI network unit is connected to main control unit by USB-HOST mode, the voice data that WIFI network module is transmitted by the mode receiving end/sending end of wireless network transmissions, and voice data is sent to main control module; Digital-to-analog conversion output unit does digital-to-analog conversion to voice data, and complete audio frequency and receive broadcasting, provide output interface simultaneously, audio amplifier connects receiving end, directly exports corresponding sound signal.
In addition application number is that the schemes such as 201310293723.0,201320109198.8 also disclose some wireless sound box systems.This kind of wireless technology solves audio amplifier must connect playback equipment restriction by cable, but has three problems still not solve: 1, except allowing audio amplifier as except audible device, it cannot be allowed to have the function of intelligent players; 2, a control software design controls multiple stage intelligent sound box simultaneously and plays different songs; 3, allow user break away from audio file quantity and be limited by the quantitative limitation of physical medium appearance, play the music that near infinite is liked more; 4, be difficult in using depart from the opertaing device such as smart mobile phone or PC, operation is comparatively complicated, for the elderly or children or the relatively low people of educational level, not easily control adjustment.
Summary of the invention
The utility model mainly solves the content collecting of the product on the audio player market existing for prior art and arranges trouble, and speed transmission problem under high definition tonequality requires and the technical matters of Long-distance Control inconvenience, provide a kind of product content to originate network audio player that is wide, that be easy to Long-distance Control.
The utility model is mainly solved by following technical proposals for above-mentioned technical matters: a kind of network audio playback equipment, comprise controller circuitry, audio control circuit, network interface circuit, indicator light circuit, audio interface circuit, key circuit and power circuit, described audio control circuit, network interface circuit, indicator light circuit are all connected with controller circuitry with key circuit, and described audio interface circuit is connected with audio control circuit, described controller circuitry comprises MTK7620 chip, described network interface circuit comprises network transformer, RJ45 interface, resistance R18, resistance R28, resistance R29, electric capacity C17 and electric capacity C18, described network transformer is HY601742, 1 pin of described network transformer, 3 pin, 6 pin and 8 pin are connected 33 pin of MTK7620 chip respectively, 32 pin, 31 pin and 30 pin, 2 pin of network transformer connect power supply GND by electric capacity C17, 7 pin of network transformer are connected with 2 pin, 1 pin of RJ45 interface, 2 pin, 9 pin of 3 pin and 6 pin difference interconnection network transformer, 11 pin, 14 pin and 16 pin, 9 pin of RJ45 interface, 10 pin, 11 pin are connected power supply GND with 12 pin, 10 pin of the first end interconnection network transformer of resistance R15 and 15 pin, the second end connects the positive pole of electric capacity C18, and the negative pole of electric capacity C18 connects power supply GND, the first end of resistance R28 connects 7 pin and 8 pin of RJ45 interface, and the second end connects the positive pole of electric capacity C18, the first end of resistance R29 connects 4 pin and 5 pin of RJ45 interface, and the second end connects the positive pole of electric capacity C18.
Controller circuitry obtains audio files by network interface circuit, then by outputting to audio amplifier from audio interface circuit after audio control circuit process or earphone is play.Indicator light circuit is used for the running status of display device, and key circuit is used for equipment regulating and controlling, and power circuit is that whole equipment is powered.Network interface circuit have greatly expanded the source of product, and can realize Long-distance Control, is convenient to user and helps when going out household to open, closing broadcasting or customization, switching program.
As preferably, described network interface circuit also comprises WIFI module.Common telepilot realizes Long-distance Control by infrared or bluetooth module, and it is infrared higher for the requirement in space with bluetooth, telepilot and equipment is needed to keep the straight line of clear to be connected, and less demanding to space of WIFI control mode, in certain distance and between barrier, also can stablize communication.
By WIFI module, smart mobile phone, apparatus such as computer can be directly connected to network audio player device, do not need through Internet.Network audio equipment also can be connected to internet by WIFI module, exempts the constraint of cable.
As preferably, described audio control circuit comprises CM108 chip, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance R1, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R10, resistance R11, LED 1 and crystal oscillator Y1; 18 pin and 48 pin of CM108 chip are connected 64 pin and 62 pin of MTK7620 chip respectively; The first end of resistance R4 connects 42 pin of CM108 chip, and the second end connects 90 pin of MTK7620 chip; The first end of resistance R5 connects 41 pin of CM108 chip, and the second end connects 89 pin of MTK7620 chip; Second end of the first end contact resistance R5 of resistance R1, second end of resistance R1 connects 37 pin of CM108 chip; The first end of electric capacity C1 connects 37 pin of CM108 chip, the second termination power AGND; The first end of resistance R6 connects 38 pin of CM108 chip, and the second end connects power supply AGND; The positive pole of electric capacity C2 connects power supply VCC2, and negative pole connects 36 pin of CM108 chip, and electric capacity C3 and electric capacity C2 is in parallel; 34 pin of CM108 chip are connected power supply VCC2 with 35 pin, and 33 pin, 36 pin, 10 pin, 24 pin are connected power supply AGND with 16 pin; 30 pin of CM108 chip are connected audio interface circuit with 32 pin; The positive pole of electric capacity C4 connects 29 pin of CM108 chip, and it is in parallel that negative pole connects power supply AGND, electric capacity C5 and electric capacity C4; 29 pin of CM108 chip connect power supply VCC1; The first end of resistance R8 connects 29 pin of CM108 chip, and the second end connects power supply AGND by resistance R11; Second end of 28 pin contact resistance R8 of CM108 chip; The positive pole of electric capacity C8 connects 26 pin of CM108 chip, and negative pole connects power supply AGND; The positive pole of LED 1 connects 12 pin of CM108 chip by resistance R10, negative pole connects power supply AGND; The positive pole of electric capacity C6 connects 8 pin of CM108 chip, and negative pole connects power supply AGND; The positive pole of electric capacity C7 connects 9 pin of CM108 chip, and negative pole connects power supply AGND; Crystal oscillator Y1 is connected across between 8 pin of CM108 chip and 9 pin, and resistance R7 and crystal oscillator Y1 is in parallel.
Audio control circuit processes rear output to audio frequency.CM108 chip is connected with USB interface, directly can be read the audio file in the memory devices such as USB flash disk, add the extendability of equipment by USB interface.
As preferably, described audio interface circuit comprises electric capacity C10, electric capacity C12, electric capacity C13, electric capacity C14 and audio interface; The positive pole of described electric capacity C12 connects 30 pin of CM108 chip, and negative pole connects 3 pin of audio interface; The positive pole of electric capacity C10 connects 3 pin of audio interface, and negative pole connects power supply AGND; The positive pole of described electric capacity C13 connects 32 pin of CM108 chip, and negative pole connects 2 pin of audio interface; The positive pole of electric capacity C14 connects 2 pin of audio interface, and negative pole connects power supply AGND.
As preferably, described power module comprises EA8122 chip, electric capacity C21, electric capacity C21, electric capacity C21, electric capacity C21, resistance R30, resistance R30, resistance R30, resistance R30, inductance L 2 and inductance L 3; 1 pin of EA8122 chip, 3 pin, 5 pin and 7 pin are GND end; The first end of inductance L 2 connects 2 pin of EA8122 chip, and the second end is held as VCC2; The first end of resistance R30 connects the second end of inductance L 2, and second end of resistance R30 connects GND end by resistance R33, and electric capacity C21 and resistance R30 is in parallel; The first end of electric capacity C22 connects the second end of inductance L 2, and second end of electric capacity C22 connects GND end; Second end of 8 pin contact resistance R30 of EA8122 chip; The first end of inductance L 3 connects 4 pin of EA8122 chip, and the second end is held as VCC1; The first end of resistance R31 connects the second end of inductance L 3, and second end of resistance R31 connects AGND end by resistance R34, and electric capacity C23 and resistance R31 is in parallel; The first end of electric capacity C24 connects the second end of inductance L 3, and second end of electric capacity C24 connects AGND end; Second end of 6 pin contact resistance R31 of EA8122 chip.
Power module provides different operating voltage for equipment.
This programme uses open Network Control Protocol, control end software is not limited to a platform, can share, as Android platform in multi-platform lower migration easily, ios platform, windows platform etc., user can freely control in wearable device, handheld device and desk device easily.
The beneficial effect that the utility model brings is, by built-in embedded computer and the direct accesses network of communication module, realizes the magnanimity expansion of source of sound; Directly can read the audio file in memory device; By built-in control circuit, the output of relatively high power can be realized, avoid the trouble that power amplifying device adds.
Accompanying drawing explanation
Fig. 1 is a kind of module map of the present utility model;
Fig. 2 is the circuit diagram of a kind of controller circuitry of the present utility model and network interface circuit;
Fig. 3 is a kind of audio control circuit figure of the present utility model;
Fig. 4 is a kind of audio interface circuit figure of the present utility model;
Fig. 5 is a kind of power circuit diagram of the present utility model;
Fig. 6 is a kind of indicator light circuit figure of the present utility model;
In figure: 1, controller circuitry, 2, audio control circuit, 3, network interface circuit, 4, indicator light circuit, 5, audio interface circuit, 6, key circuit, 7, power circuit.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of network audio playback equipment of the present embodiment, as shown in Figure 1, comprises controller circuitry 1, audio control circuit 2, network interface circuit 3, indicator light circuit 4, audio interface circuit 5, key circuit 6 and power circuit 7.Audio control circuit, network interface circuit, indicator light circuit are all connected with controller circuitry with key circuit, and audio interface circuit is connected with audio control circuit.
As shown in Figure 2, controller circuitry comprises MTK7620 chip, described network interface circuit comprises network transformer, RJ45 interface, resistance R18, resistance R28, resistance R29, electric capacity C17 and electric capacity C18, described network transformer is HY601742, 1 pin of described network transformer, 3 pin, 6 pin and 8 pin are connected 33 pin of MTK7620 chip respectively, 32 pin, 31 pin and 30 pin, 2 pin of network transformer connect power supply GND by electric capacity C17, 7 pin of network transformer are connected with 2 pin, 1 pin of RJ45 interface, 2 pin, 9 pin of 3 pin and 6 pin difference interconnection network transformer, 11 pin, 14 pin and 16 pin, 9 pin of RJ45 interface, 10 pin, 11 pin are connected power supply GND with 12 pin, 10 pin of the first end interconnection network transformer of resistance R15 and 15 pin, the second end connects the positive pole of electric capacity C18, and the negative pole of electric capacity C18 connects power supply GND, the first end of resistance R28 connects 7 pin and 8 pin of RJ45 interface, and the second end connects the positive pole of electric capacity C18, the first end of resistance R29 connects 4 pin and 5 pin of RJ45 interface, and the second end connects the positive pole of electric capacity C18.
Network interface circuit also chain is connected to WIFI module.
As shown in Figure 3, audio control circuit comprises CM108 chip, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance R1, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R10, resistance R11, LED 1 and crystal oscillator Y1; 18 pin and 48 pin of CM108 chip are connected 64 pin and 62 pin of MTK7620 chip respectively; The first end of resistance R4 connects 42 pin of CM108 chip, and the second end connects 90 pin of MTK7620 chip; The first end of resistance R5 connects 41 pin of CM108 chip, and the second end connects 89 pin of MTK7620 chip; Second end of the first end contact resistance R5 of resistance R1, second end of resistance R1 connects 37 pin of CM108 chip; The first end of electric capacity C1 connects 37 pin of CM108 chip, the second termination power AGND; The first end of resistance R6 connects 38 pin of CM108 chip, and the second end connects power supply AGND; The positive pole of electric capacity C2 connects power supply VCC2, and negative pole connects 36 pin of CM108 chip, and electric capacity C3 and electric capacity C2 is in parallel; 34 pin of CM108 chip are connected power supply VCC2 with 35 pin, and 33 pin, 36 pin, 10 pin, 24 pin are connected power supply AGND with 16 pin; 30 pin of CM108 chip are connected audio interface circuit with 32 pin; The positive pole of electric capacity C4 connects 29 pin of CM108 chip, and it is in parallel that negative pole connects power supply AGND, electric capacity C5 and electric capacity C4; 29 pin of CM108 chip connect power supply VCC1; The first end of resistance R8 connects 29 pin of CM108 chip, and the second end connects power supply AGND by resistance R11; Second end of 28 pin contact resistance R8 of CM108 chip; The positive pole of electric capacity C8 connects 26 pin of CM108 chip, and negative pole connects power supply AGND; The positive pole of LED 1 connects 12 pin of CM108 chip by resistance R10, negative pole connects power supply AGND; The positive pole of electric capacity C6 connects 8 pin of CM108 chip, and negative pole connects power supply AGND; The positive pole of electric capacity C7 connects 9 pin of CM108 chip, and negative pole connects power supply AGND; Crystal oscillator Y1 is connected across between 8 pin of CM108 chip and 9 pin, and resistance R7 and crystal oscillator Y1 is in parallel.CM108 chip is connected with USB interface.
As shown in Figure 4, audio interface circuit comprises electric capacity C10, electric capacity C12, electric capacity C13, electric capacity C14 and audio interface; The positive pole of described electric capacity C12 connects 30 pin of CM108 chip, and negative pole connects 3 pin of audio interface; The positive pole of electric capacity C10 connects 3 pin of audio interface, and negative pole connects power supply AGND; The positive pole of described electric capacity C13 connects 32 pin of CM108 chip, and negative pole connects 2 pin of audio interface; The positive pole of electric capacity C14 connects 2 pin of audio interface, and negative pole connects power supply AGND.
As shown in Figure 5, power module comprises EA8122 chip, electric capacity C21, electric capacity C21, electric capacity C21, electric capacity C21, resistance R30, resistance R30, resistance R30, resistance R30, inductance L 2 and inductance L 3; 1 pin of EA8122 chip, 3 pin, 5 pin and 7 pin are GND end; The first end of inductance L 2 connects 2 pin of EA8122 chip, and the second end is held as VCC2; The first end of resistance R30 connects the second end of inductance L 2, and second end of resistance R30 connects GND end by resistance R33, and electric capacity C21 and resistance R30 is in parallel; The first end of electric capacity C22 connects the second end of inductance L 2, and second end of electric capacity C22 connects GND end; Second end of 8 pin contact resistance R30 of EA8122 chip; The first end of inductance L 3 connects 4 pin of EA8122 chip, and the second end is held as VCC1; The first end of resistance R31 connects the second end of inductance L 3, and second end of resistance R31 connects AGND end by resistance R34, and electric capacity C23 and resistance R31 is in parallel; The first end of electric capacity C24 connects the second end of inductance L 3, and second end of electric capacity C24 connects AGND end; Second end of 6 pin contact resistance R31 of EA8122 chip.
Fig. 6 is indicator light circuit.
The equipment of this programme can carry out Long-distance Control by opertaing device, and opertaing device can be computer or the hand-held intelligent terminal of energy access network, as mobile phone, panel computer or Wearable device.
The method of this device plays music is concrete, comprises the following steps:
S1, switch on power after, equipment is in open state, and starts WIFI base station radio signal;
S2, control end equipment, by the WIFI base station of the password default access device of WIFI module, realize the connection of control end and equipment;
S3, be connected to equipment after, open control end software, can show the essential informations such as the title of current connection devices, and remind the WIFI arranging access Internet network to arrange, complete after WIFI arranges, namely equipment connect Internet network;
S4, control end software access Qu Ku by Internet, and from Qu Ku, select the special edition liked to click broadcasting, and control end sends play instruction to equipment;
After S5, equipment are subject to play instruction, by the task scheduling of controller circuitry, arrange to access the song list of special edition from Internet and start the song URL play;
S6, controller circuitry download song by song URL, and start audio control circuit decoding;
S7, the sound signal of having decoded are exported by audio interface circuit;
In S8, device plays process, by WIFI link, send broadcast state information to control end, the broadcast state information of control end display current device;
All broadcast states of S9, control end display device, and can issue in playing process as suspended, on one bent, next is bent, steering order such as adjustment volume, adjustment progress etc.;
S10, except can play at control end in addition, the simple operations button on equipment, also can realize same controlling functions, suspends, a upper song, next is bent, volume adds, volume down etc. as play.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the term such as audio frequency control, network interface herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.

Claims (5)

1. a network audio playback equipment, it is characterized in that, comprise controller circuitry, audio control circuit, network interface circuit, indicator light circuit, audio interface circuit, key circuit and power circuit, described audio control circuit, network interface circuit, indicator light circuit are all connected with controller circuitry with key circuit, and described audio interface circuit is connected with audio control circuit, described controller circuitry comprises MTK7620 chip, described network interface circuit comprises network transformer, RJ45 interface, resistance R18, resistance R28, resistance R29, electric capacity C17 and electric capacity C18, described network transformer is HY601742, 1 pin of described network transformer, 3 pin, 6 pin and 8 pin are connected 33 pin of MTK7620 chip respectively, 32 pin, 31 pin and 30 pin, 2 pin of network transformer connect power supply GND by electric capacity C17, 7 pin of network transformer are connected with 2 pin, 1 pin of RJ45 interface, 2 pin, 9 pin of 3 pin and 6 pin difference interconnection network transformer, 11 pin, 14 pin and 16 pin, 9 pin of RJ45 interface, 10 pin, 11 pin are connected power supply GND with 12 pin, 10 pin of the first end interconnection network transformer of resistance R15 and 15 pin, the second end connects the positive pole of electric capacity C18, and the negative pole of electric capacity C18 connects power supply GND, the first end of resistance R28 connects 7 pin and 8 pin of RJ45 interface, and the second end connects the positive pole of electric capacity C18, the first end of resistance R29 connects 4 pin and 5 pin of RJ45 interface, and the second end connects the positive pole of electric capacity C18.
2. network audio playback equipment according to claim 1, is characterized in that, described network interface circuit also comprises WIFI module, and described WIFI module is connected with controller circuitry.
3. network audio playback equipment according to claim 2, it is characterized in that, described audio control circuit comprises CM108 chip, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance R1, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R10, resistance R11, LED 1 and crystal oscillator Y1; 18 pin and 48 pin of CM108 chip are connected 64 pin and 62 pin of MTK7620 chip respectively; The first end of resistance R4 connects 42 pin of CM108 chip, and the second end connects 90 pin of MTK7620 chip; The first end of resistance R5 connects 41 pin of CM108 chip, and the second end connects 89 pin of MTK7620 chip; Second end of the first end contact resistance R5 of resistance R1, second end of resistance R1 connects 37 pin of CM108 chip; The first end of electric capacity C1 connects 37 pin of CM108 chip, the second termination power AGND; The first end of resistance R6 connects 38 pin of CM108 chip, and the second end connects power supply AGND; The positive pole of electric capacity C2 connects power supply VCC2, and negative pole connects 36 pin of CM108 chip, and electric capacity C3 and electric capacity C2 is in parallel; 34 pin of CM108 chip are connected power supply VCC2 with 35 pin, and 33 pin, 36 pin, 10 pin, 24 pin are connected power supply AGND with 16 pin; 30 pin of CM108 chip are connected audio interface circuit with 32 pin; The positive pole of electric capacity C4 connects 29 pin of CM108 chip, and it is in parallel that negative pole connects power supply AGND, electric capacity C5 and electric capacity C4; 29 pin of CM108 chip connect power supply VCC1; The first end of resistance R8 connects 29 pin of CM108 chip, and the second end connects power supply AGND by resistance R11; Second end of 28 pin contact resistance R8 of CM108 chip; The positive pole of electric capacity C8 connects 26 pin of CM108 chip, and negative pole connects power supply AGND; The positive pole of LED 1 connects 12 pin of CM108 chip by resistance R10, negative pole connects power supply AGND; The positive pole of electric capacity C6 connects 8 pin of CM108 chip, and negative pole connects power supply AGND; The positive pole of electric capacity C7 connects 9 pin of CM108 chip, and negative pole connects power supply AGND; Crystal oscillator Y1 is connected across between 8 pin of CM108 chip and 9 pin, and resistance R7 and crystal oscillator Y1 is in parallel.
4. network audio playback equipment according to claim 3, is characterized in that, described audio interface circuit comprises electric capacity C10, electric capacity C12, electric capacity C13, electric capacity C14 and audio interface; The positive pole of described electric capacity C12 connects 30 pin of CM108 chip, and negative pole connects 3 pin of audio interface; The positive pole of electric capacity C10 connects 3 pin of audio interface, and negative pole connects power supply AGND; The positive pole of described electric capacity C13 connects 32 pin of CM108 chip, and negative pole connects 2 pin of audio interface; The positive pole of electric capacity C14 connects 2 pin of audio interface, and negative pole connects power supply AGND.
5. the network audio playback equipment according to claim 3 or 4, it is characterized in that, described power module comprises EA8122 chip, electric capacity C21, electric capacity C21, electric capacity C21, electric capacity C21, resistance R30, resistance R30, resistance R30, resistance R30, inductance L 2 and inductance L 3; 1 pin of EA8122 chip, 3 pin, 5 pin and 7 pin are GND end; The first end of inductance L 2 connects 2 pin of EA8122 chip, and the second end is held as VCC2; The first end of resistance R30 connects the second end of inductance L 2, and second end of resistance R30 connects GND end by resistance R33, and electric capacity C21 and resistance R30 is in parallel; The first end of electric capacity C22 connects the second end of inductance L 2, and second end of electric capacity C22 connects GND end; Second end of 8 pin contact resistance R30 of EA8122 chip; The first end of inductance L 3 connects 4 pin of EA8122 chip, and the second end is held as VCC1; The first end of resistance R31 connects the second end of inductance L 3, and second end of resistance R31 connects AGND end by resistance R34, and electric capacity C23 and resistance R31 is in parallel; The first end of electric capacity C24 connects the second end of inductance L 3, and second end of electric capacity C24 connects AGND end; Second end of 6 pin contact resistance R31 of EA8122 chip.
CN201420798292.3U 2014-12-17 2014-12-17 Network audio playback equipment Active CN204288815U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105554620A (en) * 2015-12-24 2016-05-04 徐海慧 Intelligent sound box
CN106686486A (en) * 2017-01-09 2017-05-17 厦门神州鹰软件科技有限公司 Wireless radio frequency Bluetooth speaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105554620A (en) * 2015-12-24 2016-05-04 徐海慧 Intelligent sound box
CN106686486A (en) * 2017-01-09 2017-05-17 厦门神州鹰软件科技有限公司 Wireless radio frequency Bluetooth speaker

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GR01 Patent grant
C14 Grant of patent or utility model
CP03 Change of name, title or address

Address after: 310052, Zhejiang, Hangzhou province Binjiang District Long River Street No. 399, No. 3, four, five floor

Patentee after: Hangzhou grandwell Polytron Technologies Inc

Address before: 310052, No. 3, building 399, building four, Qiu Yi Road, Binjiang District Changhe Road, Hangzhou, Zhejiang

Patentee before: Hangzhou Linker Digital Technology Co., Ltd.

C56 Change in the name or address of the patentee