WO2019071555A1 - 一种基于智能终端的音频电路及音频播放*** - Google Patents

一种基于智能终端的音频电路及音频播放*** Download PDF

Info

Publication number
WO2019071555A1
WO2019071555A1 PCT/CN2017/105988 CN2017105988W WO2019071555A1 WO 2019071555 A1 WO2019071555 A1 WO 2019071555A1 CN 2017105988 W CN2017105988 W CN 2017105988W WO 2019071555 A1 WO2019071555 A1 WO 2019071555A1
Authority
WO
WIPO (PCT)
Prior art keywords
smart terminal
usb interface
audio
speaker
pin
Prior art date
Application number
PCT/CN2017/105988
Other languages
English (en)
French (fr)
Inventor
沈谊俊
芦海龙
Original Assignee
深圳传音通讯有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳传音通讯有限公司 filed Critical 深圳传音通讯有限公司
Priority to PCT/CN2017/105988 priority Critical patent/WO2019071555A1/zh
Priority to CN201780095903.4A priority patent/CN111247781B/zh
Publication of WO2019071555A1 publication Critical patent/WO2019071555A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Definitions

  • the present invention relates to the field of intelligent terminals, and in particular, to an audio circuit and an audio playing system based on an intelligent terminal.
  • smart terminal devices such as smart phones, tablet computers, and multimedia players are often used in daily life and work, facilitating people to connect with external, file browsing, entertainment and other functions.
  • smart terminal often involves a built-in speaker, and the user can directly play audio on the smart terminal; the smart terminal often also has an audio jack, and the user can access an external device such as an external earphone, a speaker, and the like.
  • the common interface standard for jacks is 3.5mm.
  • the built-in speaker of the body is used for sounding. Due to the limitation of the structure of the smart terminal, the cavity space of the speaker is narrow and the sound quality is poor;
  • the smart terminal often has a USB interface, and can connect with an external communication or charge the smart terminal. If the functions of the USB interface and the audio interface can be comprehensively designed, the audio is implemented on the basis of the USB interface.
  • the playback function is a technical problem that needs to be solved.
  • an object of the present invention is to provide an audio circuit and an audio playback system based on an intelligent terminal, which can perform audio external release on the basis of the function of the original USB interface by multiplexing the pins of the USB interface.
  • an intelligent terminal-based audio circuit including:
  • a built-in module disposed in a smart terminal, connected to the smart terminal motherboard and the USB interface, receiving a control signal and an audio signal sent by the smart terminal main board, and forwarding to the smart terminal USB interface according to the state of the control signal The audio signal;
  • the external module is disposed in a speaker, and is connected to the smart terminal through the speaker USB interface, and receives an audio signal forwarded by the built-in module and plays audio.
  • the power pin of the USB interface of the smart terminal is connected to the battery of the smart terminal; when the speaker is working, the external module obtains power through the speaker USB interface.
  • the smart terminal USB interface and the speaker USB interface are Micro USB interfaces.
  • the spare pin of the speaker USB interface is grounded through a first resistor; the spare pin of the smart terminal USB interface is connected to the signal input interface of the smart terminal motherboard; when the speaker and the smart terminal When the USB interface is connected, the signal input interface of the intelligent terminal board detects the low level and controls the audio signal to play.
  • the built-in module comprises:
  • control unit receiving a control signal sent by the smart terminal main board, and controlling a power path of the USB interface of the smart terminal to be in an on or off state;
  • a channel selection unit connected to the smart terminal motherboard and the control unit, and after receiving the control signal of the control unit, selecting a serial data signal or an audio signal sent by the smart terminal motherboard to connect to the smart terminal USB interface .
  • control unit comprises:
  • a first switch tube an input end of the first switch tube is connected to a battery positive pole of the smart terminal, and an output end of the first switch tube is connected to a power pin of a USB interface of the smart terminal, the first switch tube
  • the control terminal is connected to the positive electrode of the battery through a second resistor;
  • a second switch tube an input end of the second switch tube is connected to a control end of the first switch tube and the channel selection unit, an output end of the second switch tube is grounded, and the second switch tube is The control end receives the control signal sent by the smart terminal main board;
  • the channel selection unit selects an audio signal Connecting to the smart terminal USB interface; when the control signal is in a low voltage state, the second switch tube and the first switch tube are turned off, and the power pin of the smart terminal USB interface has no power supply, and the channel The selection unit selects a serial data signal to be connected to the smart terminal USB interface.
  • the channel selection unit comprises:
  • the first input end of the first analog switch is connected to a positive data line of the smart terminal motherboard, and the second input end of the first analog switch is connected to an audio signal line of the smart terminal motherboard
  • the output end of the first analog switch is connected to a positive data line pin of the USB interface of the smart terminal, and the control end of the first analog switch is connected to the input end of the second switch tube;
  • the first input end of the second analog switch is connected to a negative data line of the smart terminal motherboard, and the second input end of the second analog switch is connected to an audio control signal of the smart terminal motherboard
  • the output end of the second analog switch is connected to a negative data line pin of the USB interface of the smart terminal, and the control end of the second analog switch is connected to an input end of the second switch tube.
  • the positive data line pin of the smart terminal USB interface is connected in series with an RC filter circuit.
  • the external module is a power amplifier chip, including:
  • An audio input pin connected to a positive data line pin of the speaker USB interface to receive an audio signal
  • control terminal pin connected to a negative data line pin of the speaker USB interface to receive a control signal
  • the power pin is connected to the power pin of the speaker USB interface to receive power supply.
  • an audio playback system including a smart terminal and a speaker, and the audio circuit described above.
  • FIG. 1 is a block diagram showing the structure of an audio circuit based on a smart terminal in accordance with a preferred embodiment of the present invention
  • FIG. 2 is a structural block diagram of an audio circuit based on an intelligent terminal in accordance with another preferred embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a circuit structure of a built-in module in accordance with a preferred embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing the circuit structure of an external module in accordance with a preferred embodiment of the present invention.
  • Figure 5 is a block diagram showing the structure of an audio playback system in accordance with a preferred embodiment of the present invention.
  • 10-Intelligent terminal 11-built-in module, 12-smart terminal USB interface, 13-smart terminal board, 20-speaker, 21-external module, 211-amplifier chip, 212-first resistor, 22-speaker USB interface, 111-control unit, 1111- The first switch tube, the 1112-second switch tube, the 1113-second resistor, the 112-channel selection unit, the 1121-first analog switch, the 1122-second analog switch, and the 30-audio playback system.
  • the term “if” may be interpreted to mean “when” or “once” or “in response to determining” or “in response to detecting” depending on the context.
  • the phrase “if determined” or “if a condition or event is stated” is optionally interpreted as meaning “once determined” or “in response to determining” or “once detected” The stated condition or event] or “in response to the detection of [stated condition or event]”.
  • FIG. 1 is a structural block diagram of an intelligent terminal-based audio circuit in accordance with a preferred embodiment of the present invention, the audio circuit including:
  • the built-in module 11 is disposed in a smart terminal 10, and is connected to the smart terminal main board 13 and the USB interface 12, and receives a control signal and an audio signal sent by the smart terminal main board 13, according to the state of the control signal.
  • the smart terminal USB interface 12 forwards the audio signal.
  • the smart terminal 10 can be a smart terminal device with a USB interface, such as a smart phone, a tablet computer, or a multimedia player, and can store and play audio.
  • the smart terminal main board 13 is also called a mainboard, a system board or a motherboard; it is divided into a commercial motherboard and an industrial motherboard, and is installed in the smart terminal casing. One of the most basic and important components of the smart terminal 10 is described.
  • the smart terminal main board 13 is generally a rectangular circuit board, and the main circuit system constituting the intelligent terminal is installed thereon, and generally has a BIOS chip, an I/O control chip, a key and a panel control switch interface, a light indicator connector, and an expansion slot. And other components.
  • the smart terminal main board 13 can decode the stored audio file into an audio signal, and send the audio signal to the built-in module 11 through an electronic circuit.
  • the smart terminal main board 13 sends a control signal to the built-in module 11 through an electronic circuit, and the built-in module 11 operates according to the state of the control signal, in particular, determines whether to forward the audio signal to the smart terminal USB interface 12.
  • the smart terminal USB interface 12 that is, the interface of the smart terminal 10 and the external serial port connection, can be divided into different types according to different shape configurations, such as a standard USB-A type interface, a standard USB-B type interface, and a Micro USB. Interface, Type-C USB interface, Mini USB interface, etc. Different types of USB interfaces have different pin counts, such as 4Pin, 5Pin, etc.
  • the speaker USB interface 22 must use the same type of USB interface to make the connection.
  • the pins of the smart terminal USB interface 12 mainly include a power pin, a ground pin, a positive data line pin, a negative data line pin, and may have an alternate pin depending on the type. In this embodiment, the positive data line pin or the negative data line pin of the smart terminal USB interface 12 may be selected to transmit the audio signal, and the pin is electrically connected to the audio signal output end of the built-in module 11 can.
  • the external module 21 is disposed in a speaker 20, and is connected to the smart terminal 10 through the speaker USB interface 22, and receives an audio signal forwarded by the built-in module 11 and plays audio.
  • the speaker 20 refers to a device that can convert an audio signal into a sound. In a popular way, the speaker main body or the subwoofer box has its own power amplifier, and the audio signal is amplified and the sound is played back by the speaker itself. Make it louder.
  • the speaker is the terminal of the entire sound system, its function is to convert the audio energy into the corresponding sound energy, and radiate it into the space. It is an extremely important part of the sound system, and it is responsible for the task of turning an electrical signal into an acoustic signal for direct listening.
  • Tone The box is mainly to prevent the sound wave signals on the front and back of the speaker diaphragm from directly forming a loop, so that only high-frequency sounds with a small wavelength can be transmitted, and other sound signals are offset by the superposition.
  • the volume of the general speaker is calculated according to the speaker size of the mid-woofer unit.
  • the speaker 20 is an external speaker, and the sound of the cavity of the external speaker is larger than that of the cavity in the smart terminal 10 in the prior art, and the sound effect is better.
  • the speaker 20 has a speaker USB interface 22 that can receive external audio signals.
  • the external module 21 is connected to the speaker USB interface 22, and when the speaker USB interface 22 is connected to the smart terminal USB interface 12, the audio signal sent by the built-in module 11 can be received, and the audio signal is received. The audio signal is amplified and played.
  • the pin for transmitting the audio signal connected to the external module 21 in the speaker USB interface 22 should be consistent with the pin for transmitting the audio signal in the USB interface 12 of the smart terminal.
  • the smart terminal USB interface 12 first receives an audio signal from the built-in module 11 with a positive data line pin, and the speaker USB interface 22 also selects a positive data line pin to be connected to the external module 11 and transmits audio signal.
  • the above audio circuit realizes the function of performing audio external release by using the USB interface.
  • the smart terminal USB interface 12 and the USB 22 interface of the speaker are Micro USB interfaces.
  • the Micro USB interface has been widely used in the field of smart terminals, especially smart terminals that install Android operating systems, which mostly use this type of interface.
  • the Micro USB interface is smaller than the standard USB and Mini-USB connectors, saves space, has up to 10,000 insertion and extraction life and strength, and is designed with a blind plug structure.
  • the Micro-USB standard supports the current USB OTG function, that is, in the absence of a host (such as a personal computer), the portable device can directly realize data transmission, compatible with USB1.1 (low speed: 1.5Mb/s, full speed: 12Mb/ s) and USB2.0 (high speed: 480Mb/s), while providing data transmission and charging, especially suitable for high speed (HS) or higher rate data transmission, is connected to small devices (such as mobile phones, PDAs, digital cameras, digital The best choice for cameras and portable digital players, etc., can also provide convenience for the car, only need USB car charger, plus the MICRO USB data cable for emergency charging of the phone.
  • the Micro USB interface has five pins, including a power pin VBUS, a ground pin GND, a positive data line pin D+, a negative data line pin D-, and an alternate pin ID.
  • the spare pin ID can be customized as a pin of the auxiliary control function.
  • the power pin of the smart terminal USB interface 12 is connected to the battery of the smart terminal 10; when the speaker 20 is in operation, the external module 21 passes through the speaker USB interface 22 Get the power.
  • the smart terminal USB interface 12 is used to supply power to the speaker 20 through its power pin.
  • the power pin of the smart terminal USB interface 12 is connected to the battery. Connected, it has the ability to output power to the outside. In order to meet the power demand of the external device, when the battery is connected to the power pin, the voltage can be converted by the DC voltage conversion module to achieve a voltage that meets the demand.
  • the spare pin of the speaker USB interface 22 is grounded through a first resistor 212; the spare pin of the smart terminal USB interface 12 is connected to the signal input interface of the smart terminal motherboard 13;
  • the signal input interface of the smart terminal main board 13 controls the audio signal after detecting a low level.
  • This embodiment mainly implements state detection of the smart terminal USB interface 12, because the smart terminal USB interface 12 works in two states, one is normal data transmission and charging state, and the other is playing audio state. And the two working states cannot be used at the same time, so it is necessary to detect the working state of the smart terminal USB interface 12, so that the smart terminal main board 13 makes a correct function selection.
  • the spare pin of the speaker USB interface 22 is grounded through a first resistor 212.
  • the corresponding spare pin on the smart terminal USB interface 12 is also
  • the signal input interface of the smart terminal main board 13 detects the voltage state of the spare pin, it can be known that it is in the grounded state, and it is judged that the speaker 20 is currently being used, and the control signal must be sent to the built-in module 11.
  • the smart terminal USB interface 12 is allowed to receive an audio signal.
  • the signal input interface may adopt an internal pull-up manner, such that when the spare pin is left floating, the signal input interface defaults to a high level.
  • the built-in module 11 includes:
  • the control unit 111 receives a control signal sent by the smart terminal main board 13 to control the power supply path of the smart terminal USB interface 12 to be in an on or off state.
  • the input signal of the control unit 111 is a control signal and an audio signal sent by the smart terminal main board 13; the output signal of the control unit 111 is an audio signal and a power supply path for supplying power to the smart terminal USB interface 12.
  • the control unit 111 may be a digital logic chip or a circuit composed of a switch tube. When the input control signal is valid, the power supply path is controlled to be turned on, and the audio signal is forwarded to the channel selection unit 112; When the input control signal is invalid, the power supply path is controlled to be disconnected, and the audio signal is not forwarded.
  • the control unit 111 implements a function of controlling power supply to the smart terminal USB interface 12 and controlling audio signal playback.
  • the channel selection unit 112 is connected to the smart terminal main board 13 and the control unit 111, and after receiving the control signal of the control unit 111, selects a serial data signal or an audio signal sent by the smart terminal main board 13 to be connected to The smart terminal USB interface 12.
  • the channel selection unit 112 provides a selection output function of at least two channels, and the optional signal has a serial data signal and an audio signal sent by the smart terminal main board 13, and the purpose is that when the smart terminal USB interface 12 is in a normal state, respectively When the working state or the audio playing state is selected, the correct signal output can be selected to achieve the working effect.
  • the channel selection unit 112 can be an analog switch or a common channel selection control chip.
  • the channel selection unit 112 further has a control terminal that receives an external control signal. In this embodiment, the control signal of the control unit 111 is received, and the corresponding input signal output is selected according to the high and low state of the control signal.
  • control unit 111 includes:
  • the input end of the first switch tube 1111 is connected to the battery positive pole of the smart terminal 10, and the output end of the first switch tube 1111 is connected to the power pin of the smart terminal USB interface 12, and the first switch tube 1111
  • the control terminal is connected to the positive electrode of the battery through a second resistor 1113.
  • the first switch tube 1111 is preferably a field effect transistor, and the input end corresponds to the source S, the output end corresponds to the drain D, and the control end corresponds to the gate G.
  • the second resistor 1113 functions as a pull-up resistor.
  • the input end of the second switch tube 1112 is connected to the control end of the first switch tube 1111 and the channel selection unit 112, the output end of the second switch tube 1112 is grounded, and the second switch tube 1112 is The control terminal receives the control signal sent by the smart terminal main board 13.
  • the second switch tube 1112 is preferably a three-stage tube, the input end of which corresponds to the collector, the output end corresponds to the emitter, and the control end corresponds to the base.
  • J1001 in the figure is the smart terminal USB interface 12, which has 5 pins.
  • the control signal is in a high voltage state
  • the second switch transistor 1112 when the second switch transistor 1112 is turned on, its input terminal is at a low level, then the first switch transistor 1111 is turned on, and the connection point VBUS and the battery positive terminal VBAT Connect and get battery powered.
  • the connection point VBUS is in turn connected to a power pin in the USB interface 12 of the smart terminal, and the power is externally supplied through the power pin.
  • the channel selection unit 112 selects an audio signal to be connected to the smart terminal USB interface 12, so as to output an audio signal to the outside.
  • the control signal When the control signal is in a low voltage state, the second switch tube 1112 and the first switch tube 1111 are turned off, the power pin of the smart terminal USB interface 12 has no power supply, and the channel selection unit 112 selects serial The data signal is connected to the smart terminal USB interface 12 to implement a normal USB interface working state.
  • the channel selection unit 112 includes:
  • the first input end of the first analog switch 1121 is connected to the positive data line of the smart terminal main board 13 , and the second input end of the first analog switch 1121 is connected to the audio signal line of the smart terminal main board 13 .
  • An output end of the first analog switch 1121 is connected to a positive data line pin of the smart terminal USB interface 13.
  • a control end of the first analog switch 1121 is connected to an input end of the second switch tube 1112.
  • the first input end of the second analog switch 1122 is connected to the negative data line of the smart terminal main board 13 , and the second input end of the second analog switch 1122 is connected to the audio control signal of the smart terminal main board 13 .
  • An output end of the second analog switch 1122 is connected to a negative data line pin of the smart terminal USB interface 12, and a control end of the second analog switch 1122 is connected to an input end of the second switch tube 1112.
  • the second switch tube 1112 simultaneously performs channel selection control on the first analog switch 1121 and the second analog switch 1122.
  • the input end thereof is at a low level, then the The control ends of the first analog switch 1121 and the second analog switch 1122 are in a low state, and an audio signal and an audio control signal are respectively selected and output to the smart terminal USB interface 12 to implement an audio output and control function.
  • the audio control signal can control the control end of the external module 21, and when the speaker 20 is connected with the smart terminal 10, implement a control function for audio playback, such as starting or stopping a playback operation.
  • the input end thereof is at a high level, and the control ends of the first analog switch 1121 and the second analog switch 1122 are in a high state, respectively selecting a positive data line signal and a negative
  • the data line signal is output to the smart terminal USB interface 12 to implement a USB interface data transmission function.
  • the positive data line pin of the smart terminal USB interface 12 is connected in series with an RC filter circuit, which is R1003 and C1006 in FIG. Since the audio signal is an analog signal, and the smart terminal 10 operates in a complex electromagnetic environment, in order to reduce the interference of the working environment on the audio signal, the RC filter circuit is selected to filter the audio signal.
  • the parameters of the RC filter circuit may be set according to the frequency range of the interference signal. For example, when filtering the high frequency interference signal, a capacitor with a smaller capacity may be selected.
  • the external module 21 is a power amplifier chip 211.
  • the external module 21 is a power amplifier chip 211.
  • the audio input pin INN is connected to a positive data line pin of the speaker USB interface 22 to receive an audio signal.
  • the audio input pin INN front end may also be connected in series with an RC circuit to filter the received audio signal.
  • the control terminal pin SHDN is connected to a negative data line pin of the speaker USB interface 22 to receive a control signal.
  • the control terminal pin SHDN is at a high level, the power amplifier chip 211 does not work; when the control terminal pin SHDN is at a low level, the power amplifier chip 211 operates, and the smart terminal main board 13 issues different
  • the audio control signal can control the working state of the power amplifier chip 211.
  • the power pin VDD is connected to a power pin of the speaker USB interface 22 to receive power.
  • the built-in module 11 controls the power supply path of the smart terminal USB interface 12
  • the power supply state to the power amplifier chip 211 is also controlled, and the power supply can be disconnected when audio playback is not required, thereby saving power consumption.
  • the speaker USB interface 22 is J101 in FIG. 4 and has five pins corresponding to the pins of the smart terminal USB interface 12.
  • the audio playback system 30 includes a smart terminal 10 and a speaker 20 and the audio circuit described above.
  • the smart terminal 10 and the speaker 20 are connected through a USB interface, and the smart terminal 10 controls the speaker 20 to play an audio file.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

本发明提供了一种基于智能终端的音频电路及音频播放***，所述音频电路包括：内置模块，设于一智能终端内，与所述智能终端主板及USB接口连接，接收所述智能终端主板发出的控制信号及音频信号，根据所述控制信号的状态向所述智能终端USB接口转发所述音频信号；外置模块，设于一音箱内，通过所述音箱USB接口与所述智能终端连接，接收所述内置模块转发的音频信号并播放音频。采用上述技术方案后，在所述智能终端USB接口上实现通信功能、充电功能以及音频播放功能的集成，无需额外的音频接口，节省音频硬件接口所需的结构空间；使用外放音箱实现更好的听觉效果。

Description

一种基于智能终端的音频电路及音频播放*** 技术领域
本发明涉及智能终端领域，尤其涉及一种基于智能终端的音频电路及音频播放***。
背景技术
目前，智能手机、平板电脑、多媒体播放器等智能终端设备常用于日常生活、工作中，方便人们实现联系外部、文件浏览、娱乐等功能。尤其是随着人民文化生活的日益丰富，越来越多的用户喜欢使用智能终端播放音乐或视频，享受高科技带来的美好体验。所述智能终端往往涉及有内置扬声器，用户可以直接在所述智能终端上播放音频；所述智能终端往往还涉及有音频插孔，用户可以接入外接耳机、音箱等外放设备，所述音频插孔常见的接口标准为3.5mm接口。现有技术仍存在以下问题：
1.智能终端自身进行音频外放时，采用机身内置扬声器来发声，由于所述智能终端结构的限制，扬声器的腔体空间狭小，音质较差；
2.使用外放的耳机或音箱时，需要设计额外的音频插孔，对智能终端的设计是个挑战。
现有技术中，所述智能终端往往具有USB接口，可以实现与外部通信连接或对所述智能终端充电，若能将USB接口与音频接口的功能进行综合设计，在USB接口的基础上实现音频的播放功能，是需要解决的技术问题。
因此需要设计一种基于智能终端的音频电路，通过USB接口实现音频的播放，同时兼顾USB接口本身功能的使用。
发明内容
为了克服上述技术缺陷，本发明的目的在于提供一种基于智能终端的音频电路及音频播放***，通过对所述USB接口的引脚进行复用，在原有USB接口的功能基础上实现音频外放功能。
本申请的第一方面，公开了一种基于智能终端的音频电路，包括：
内置模块，设于一智能终端内，与所述智能终端主板及USB接口连接，接收所述智能终端主板发出的控制信号及音频信号，根据所述控制信号的状态向所述智能终端USB接口转发所述音频信号；
外置模块，设于一音箱内，通过所述音箱USB接口与所述智能终端连接，接收所述内置模块转发的音频信号并播放音频。
优选地，所述智能终端USB接口的电源引脚与所述智能终端的电池连接；当所述音箱工作时，所述外置模块通过所述音箱USB接口获取电源。
优选地，所述智能终端USB接口及所述音箱USB接口为Micro USB接口。
优选地，所述音箱USB接口的备用引脚通过一第一电阻接地；所述智能终端USB接口的备用引脚与所述智能终端主板的信号输入接口连接；当所述音箱与所述智能终端通过USB接口连接时，所述智能终端主板的信号输入接口检测到低电平后控制音频信号播放。
优选地，所述内置模块包括：
控制单元，接收所述智能终端主板发出的控制信号，控制所述智能终端USB接口的电源通路处于接通或断开状态；
通道选择单元，与所述智能终端主板及所述控制单元连接，接收所述控制单元的控制信号后，选择所述智能终端主板发出的串行数据信号或音频信号连接至所述智能终端USB接口。
优选地，所述控制单元包括：
第一开关管，所述第一开关管的输入端与所述智能终端的电池正极连接，所述第一开关管的输出端与智能终端USB接口的电源引脚连接，所述第一开关管的控制端通过一第二电阻与所述电池正极连接；
第二开关管，所述第二开关管的输入端与所述第一开关管的控制端及所述通道选择单元连接，所述第二开关管的输出端接地，所述第二开关管的控制端接收所述智能终端主板发出的控制信号；
当所述控制信号为高电压状态时，所述第二开关管及第一开关管导通，所述智能终端USB接口的电源引脚由所述电池正极供电，所述通道选择单元选择音频信号连接至所述智能终端USB接口；当所述控制信号为低电压状态时，所述第二开关管及第一开关管截止，所述智能终端USB接口的电源引脚无供电电源，所述通道选择单元选择串行数据信号连接至所述智能终端USB接口。
优选地，所述通道选择单元包括：
第一模拟开关，所述第一模拟开关的第一输入端与所述智能终端主板的正数据线连接，所述第一模拟开关的第二输入端与所述智能终端主板的音频信号线连接，所述第一模拟开关的输出端与所述智能终端USB接口的正数据线引脚连接，所述第一模拟开关的控制端与所述第二开关管的输入端连接；
第二模拟开关，所述第二模拟开关的第一输入端与所述智能终端主板的负数据线连接，所述第二模拟开关的第二输入端与所述智能终端主板的音频控制信号连接，所述第二模拟开关的输出端与所述智能终端USB接口的负数据线引脚连接，所述第二模拟开关的控制端与所述第二开关管的输入端连接。
优选地，所述智能终端USB接口的正数据线引脚串接一RC滤波电路。
优选地，所述外置模块为一功放芯片，包括：
音频输入引脚，与所述音箱USB接口的正数据线引脚连接，接收音频信号；
控制端引脚，与所述音箱USB接口的负数据线引脚连接，接收控制信号；
电源引脚，与所述音箱USB接口的电源引脚连接，接收电源供电。
本申请的第二方面，公开了一种音频播放***，包括智能终端和音箱，以及上述音频电路。
采用了上述技术方案后，与现有技术相比，具有以下有益效果：
1.在所述智能终端USB接口上实现通信功能、充电功能以及音频播放功能的集成，无需额外的音频接口，节省音频硬件接口所需的结构空间；
2.使用外放音箱实现更好的听觉效果。
附图说明
图1为符合本发明一优选实施例中基于智能终端的音频电路的结构框图；
图2为符合本发明另一优选实施例中基于智能终端的音频电路的结构框图；
图3为符合本发明一优选实施例中内置模块的电路结构示意图；
图4为符合本发明一优选实施例中外置模块的电路结构示意图；
图5为符合本发明一优选实施例中音频播放***的结构框图。
附图标记：
10-智能终端、11-内置模块、12-智能终端USB接口、13-智能终端主板、20-音箱、21-外置模块、211-功放芯片、212-第一电阻、22-音箱USB接口、111-控制单元、1111- 第一开关管、1112-第二开关管、1113-第二电阻、112-通道选择单元、1121-第一模拟开关、1122-第二模拟开关、30-音频播放***。
具体实施方式
以下由特定的具体实施例说明本申请的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本申请的其他优点及功效。
在下述描述中，参考附图，附图描述了本申请的若干实施例。应当理解，还可使用其他实施例，并且可以在不背离本公开的精神和范围的情况下进行机械组成、结构、电气以及操作上的改变.下面的详细描述不应该被认为是限制性的，并且本申请的实施例的范围仅由公布的专利的权利要求书所限定.这里使用的术语仅是为了描述特定实施例，而并非旨在限制本申请。空间相关的术语，例如“上”、“下”、“左”、“右”、“下面”、“下方”、“下部”、“上方”、“上部”等，可在文中使用以便于说明图中所示的一个元件或特征与另一元件或特征的关系。
虽然在一些实例中术语第一、第二等在本文中用来描述各种元件，但是这些元件不应当被这些术语限制。这些术语仅用来将一个元件与另一个元件进行区分。
再者，如同在本文中所使用的，单数形式“一”、“一个”和“该”旨在也包括复数形式，除非上下文中有相反的指示.应当进一步理解，术语“包含”、“包括”表明存在所述的特征、步骤、操作、元件、组件、项目、种类、和/或组，但不排除一个或多个其他特征、步骤、操作、元件、组件、项目、种类、和/或组的存在、出现或添加.此处使用的术语“或”和“和/或”被解释为包括性的，或意味着任一个或任何组合.因此，“A、B或C”或者“A、B和/或C”意味着“以下任一个：A；B；C；A和B；A和C；B和C；A、B和C”.仅当元件、功能、步骤或操作的组合在某些方式下内在地互相排斥时，才会出现该定义的例外。
如本文所使用的，术语“如果”取决于上下文可以被解释为意味着“当…时”或者“一旦…则”或者“响应于确定”或“响应于检测到”。类似地，短语“如果确定”或者“如果检测到[陈述的条件或事件]”取决于上下文可选地被解释为意味着“一旦确定，则”或者“响应于确定”或者“一旦检测到[陈述的条件或事件]”或者“响应于检测到[陈述的条件或事件]”。
参阅图1，为符合本发明一优选实施例中基于智能终端的音频电路的结构框图，所述音频电路包括：
-内置模块11
所述内置模块11，设于一智能终端10内，与所述智能终端主板13及USB接口12连接，接收所述智能终端主板13发出的控制信号及音频信号，根据所述控制信号的状态向所述智能终端USB接口12转发所述音频信号。所述智能终端10可以是智能手机、平板电脑、多媒体播放器等具备USB接口的智能终端设备，可存储并播放音频。
所述智能终端主板13，又叫主机板(mainboard)、***板(systemboard)或母板(motherboard)；它分为商用主板和工业主板两种，安装在所述智能终端机壳内，是所述智能终端10最基本的也是最重要的部件之一。所述智能终端主板13一般为矩形电路板，上面安装了组成智能终端的主要电路***，一般有BIOS芯片、I/O控制芯片、键和面板控制开关接口、指示灯插接件、扩充插槽等元件。所述智能终端主板13可将存储的音频文件解码为音频信号，并将所述音频信号通过电子线路发送给所述内置模块11。所述智能终端主板13通过电子线路向所述内置模块11发送控制信号，所述内置模块11根据控制信号的状态进行工作，特别是决定是否转发所述音频信号至所述智能终端USB接口12。
所述智能终端USB接口12即所述智能终端10与外部进行串口连接的接口，根据外形构造的不同可分为不同的类型，例如标准USB-A型接口、标准USB-B型接口、Micro USB接口、Type-C USB接口、Mini USB接口等，不同类型的USB接口具有不同的引脚数量，如4Pin、5Pin等。一旦所述智能终端USB接口12选定了某种类型，则所述音箱USB接口22必须使用同种类型的USB接口才能进行连接。所述智能终端USB接口12的引脚主要包括电源引脚、接地引脚、正数据线引脚、负数据线引脚，还可根据类型不同具有备用引脚。本实施例中，可选择所述智能终端USB接口12的正数据线引脚或负数据线引脚传输所述音频信号，将该引脚与所述内置模块11的音频信号输出端电气连接即可。
-外置模块21
所述外置模块21设于一音箱20内，通过所述音箱USB接口22与所述智能终端10连接，接收所述内置模块11转发的音频信号并播放音频。所述音箱20指可将音频信号变换为声音的一种设备，通俗的讲就是指音箱主机箱体或低音炮箱体内自带功率放大器，对音频信号进行放大处理后由音箱本身回放出声音，使其声音变大。音箱是整个音响***的终端，其作用是把音频电能转换成相应的声能，并把它辐射到空间去。它是音响***极其重要的组成部分，担负着把电信号转变成声信号供人的耳朵直接聆听的任务。音 箱主要是为了防止扬声器振膜正面和反面的声波信号直接形成回路，造成仅有波长很小的高中频声音可以传播出来，而其他的声音信号被叠加抵消掉了。音箱密闭后由于大气压的问题，音箱的箱体是越大越有利于低频声音还原，所以，一般音箱的容积是根据中低音单元的扬声器尺寸计算出来一个折中的数据。本实施例中所述音箱20为外置音箱，相对于现有技术中利用所述智能终端10内的腔体发出声音，外置音箱的腔体体积更大，发音效果更佳好。
所述音箱20具有音箱USB接口22，可接收外部的音频信号。所述外置模块21与所述音箱USB接口22连接，当所述音箱USB接口22与所述智能终端USB接口12连接时，即可接收所述内置模块11发来的音频信号，并将所述音频信号放大后播放。需要注意的是，所述音箱USB接口22中与所述外置模块21连接的用于传输音频信号的引脚，应当与所述智能终端USB接口12中传输音频信号的引脚一致。例如所述智能终端USB接口12先用正数据线引脚接收来自所述内置模块11的音频信号，则所述音箱USB接口22也选择正数据线引脚与所述外置模块11连接并传输音频信号。
综上，上述音频电路实现了利用USB接口进行音频外放的功能。
作为上述音频电路的进一步改进，所述智能终端USB接口12及所述音箱的USB22接口为Micro USB接口。Micro USB接口已广泛地应用于智能终端领域，特别是安装安卓操作***的智能终端大部分使用该类型接口。所述Micro USB接口比标准USB和Mini-USB连接器更小，节省空间，具有高达10000次的插拔寿命和强度，盲插结构设计。Micro-USB标准支持目前USB的OTG功能，即在没有主机(例如个人电脑)的情况下，便携设备之间可直接实现数据传输，兼容USB1.1(低速：1.5Mb/s，全速：12Mb/s)和USB2.0(高速：480Mb/s)，同时提供数据传输和充电，特别适用于高速(HS)或更高速率的数据传输，是连接小型设备(如手机，PDA，数码相机，数码摄像机和便携数字播放器等等)的最佳选择，同时也能为车载提供方便，只需要USB车载充电器，再加MICRO USB数据线进行手机应急充电。所述Micro USB接口具有5个引脚，包括电源引脚VBUS、接地引脚GND、正数据线引脚D+、负数据线引脚D-及备用引脚ID。在本实施例中，所述备用引脚ID可以自定义为辅助控制功能的引脚。
作为上述音频电路的进一步改进，所述智能终端USB接口12的电源引脚与所述智能终端10的电池连接；当所述音箱20工作时，所述外置模块21通过所述音箱USB接口22获取电源。本实施例使用所述智能终端USB接口12对音箱20进行供电，通过其电源引脚实现。在所述智能终端10内，所述智能终端USB接口12的电源引脚与电池连 接，则具备向外输出电能的能力。为了满足外部设备的用电需求，所述电池与所述电源引脚连接时还可通过直流电压变换模块进行电压变换，以实现符合需求的电压。
作为上述音频电路的进一步改进，所述音箱USB接口22的备用引脚通过一第一电阻212接地；所述智能终端USB接口12的备用引脚与所述智能终端主板13的信号输入接口连接；当所述音箱20与所述智能终端10通过USB接口连接时，所述智能终端主板13的信号输入接口检测到低电平后控制音频信号播放。本实施例主要实现对所述智能终端USB接口12的状态检测，由于所述智能终端USB接口12工作于两种状态，一种是正常的数据传输及充电状态，另一种是播放音频的状态，且两种工作状态不能同时使用，因此有必要对所述智能终端USB接口12的工作状态进行检测，以便所述智能终端主板13作出正确的功能选择。所述音箱USB接口22的备用引脚通过一第一电阻212接地，当所述智能终端USB接口12与所述音箱USB接口22连接时，所述智能终端USB接口12上对应的备用引脚同样处于接地状态，则所述智能终端主板13的信号输入接口检测所述备用引脚的电压状态即可获知其处于接地状态，则判断当前正在使用音箱20，须向所述内置模块11发送控制信号，允许所述智能终端USB接口12接收音频信号。当所述智能终端USB接口12与所述音箱USB接口22不连接时，所述智能终端USB接口12的备用引脚悬空，则所述智能终端主板13的信号输入接口检测到悬空状态或高电平，为了更好地实现对本状态的检测，所述信号输入接口可采用内部上拉的方式，这样当所述备用引脚悬空时，所述信号输入接口默认为高电平。
参阅图2，为符合本发明另一优选实施例中基于智能终端的音频电路的结构框图，所述内置模块11包括：
-控制单元111
所述控制单元111接收所述智能终端主板13发出的控制信号，控制所述智能终端USB接口12的电源通路处于接通或断开状态。所述控制单元111的输入信号为所述智能终端主板13发出的控制信号及音频信号；所述控制单元111的输出信号为音频信号及为所述智能终端USB接口12供电的电源通路。所述控制单元111可以是数字逻辑芯片，也可以是开关管组成的电路，当其输入的控制信号有效时，控制所述电源通路接通，并转发所述音频信号至通道选择单元112；当其其输入的控制信号无效时，控制所述电源通路断开，不转发所述音频信号。这样所述控制单元111实现了控制向所述智能终端USB接口12供电以及控制音频信号播放的功能。
-通道选择单元112
所述通道选择单元112与所述智能终端主板13及所述控制单元111连接，接收所述控制单元111的控制信号后，选择所述智能终端主板13发出的串行数据信号或音频信号连接至所述智能终端USB接口12。所述通道选择单元112提供至少两个通道的选择输出功能，可选的信号有所述智能终端主板13发出的串行数据信号、音频信号，目的是当所述智能终端USB接口12分别处于正常工作状态或音频播放状态时，可选择正确的信号输出，实现工作效果。所述通道选择单元112可以是模拟开关或常见的通道选择控制芯片。所述通道选择单元112还具有控制端，接收外部控制信号，本实施例中接收所述控制单元111的控制信号，根据控制信号的高低电平状态选择相应的输入信号输出。
参阅图3，为符合本发明一优选实施例中内置模块的电路结构示意图，所述控制单元111包括：
-第一开关管1111
所述第一开关管1111输入端与所述智能终端10的电池正极连接，所述第一开关管1111的输出端与智能终端USB接口12的电源引脚连接，所述第一开关管1111的控制端通过一第二电阻1113与所述电池正极连接。所述第一开关管1111优选为场效应管，其输入端对应为源极S，输出端对应为漏极D，控制端对应为栅极G。所述第二电阻1113起上拉电阻的作用。
-第二开关管1112
所述第二开关管1112的输入端与所述第一开关管1111的控制端及所述通道选择单元112连接，所述第二开关管1112的输出端接地，所述第二开关管1112的控制端接收所述智能终端主板13发出的控制信号。所述第二开关管1112优选为三级管，其输入端对应集电极，输出端对应发射极，控制端对应基极。
图中J1001为所述智能终端USB接口12，具有5个引脚。当所述控制信号为高电压状态时，所述第二开关管1112导通时，其输入端为低电平，则所述第一开关管1111导通，连接点VBUS与所述电池正极VBAT连接，获得电池供电。所述连接点VBUS又与所述智能终端USB接口12中的电源引脚连接，则通过该电源引脚向外供电。所述第二开关管1112导通时，所述通道选择单元112选择音频信号连接至所述智能终端USB接口12，实现向外输出音频信号。当所述控制信号为低电压状态时，所述第二开关管1112及第一开关管1111截止，所述智能终端USB接口12的电源引脚无供电电源，所述通道选择单元112选择串行数据信号连接至所述智能终端USB接口12，实现正常的USB接口工作状态。
作为上述音频电路的进一步改进，所述通道选择单元112包括：
-第一模拟开关1121
所述第一模拟开关1121的第一输入端与所述智能终端主板13的正数据线连接，所述第一模拟开关1121的第二输入端与所述智能终端主板13的音频信号线连接，所述第一模拟开关1121的输出端与所述智能终端USB接口13的正数据线引脚连接，所述第一模拟开关1121的控制端与所述第二开关管1112的输入端连接。
-第二模拟开关1122
所述第二模拟开关1122的第一输入端与所述智能终端主板13的负数据线连接，所述第二模拟开关1122的第二输入端与所述智能终端主板13的音频控制信号连接，所述第二模拟开关1122的输出端与所述智能终端USB接口12的负数据线引脚连接，所述第二模拟开关1122的控制端与所述第二开关管1112的输入端连接。
所述第二开关管1112对所述第一模拟开关1121和第二模拟开关1122同时进行通道选择控制，当所述第二开关管1112导通时，其输入端处于低电平，则所述第一模拟开关1121和第二模拟开关1122的控制端处于低电平状态，分别选择音频信号和音频控制信号输出至所述智能终端USB接口12，实现音频输出及控制功能。所述音频控制信号可对所述外置模块21的控制端进行控制，在所述音箱20与所述智能终端10处于连接时，实现对音频播放的控制功能，例如开始或停止播放操作。当所述第二开关管1112截止时，其输入端处于高电平，则所述第一模拟开关1121和第二模拟开关1122的控制端处于高电平状态，分别选择正数据线信号和负数据线信号输出至所述智能终端USB接口12，实现USB接口数据传输功能。
作为上述音频电路的进一步改进，所述智能终端USB接口12的正数据线引脚串接一RC滤波电路，在图3中为R1003和C1006。由于音频信号为模拟信号，且所述智能终端10工作在复杂的电磁环境下，为了减少工作环境对所述音频信号的干扰，故选用RC滤波电路对所述音频信号进行滤波。可根据干扰信号的频率范围设置所述RC滤波电路的参数，例如对高频干扰信号滤波时，可选择容量较小的电容。
参阅图4，为符合本发明一优选实施例中外置模块的电路结构示意图，所述外置模块21为一功放芯片211。包括：
-音频输入引脚INN
所述音频输入引脚INN与所述音箱USB接口22的正数据线引脚连接，接收音频信号。所述音频输入引脚INN前端亦可串接一RC电路，对接收的音频信号进行滤波。
-控制端引脚SHDN
所述控制端引脚SHDN与所述音箱USB接口22的负数据线引脚连接，接收控制信号。当所述控制端引脚SHDN为高电平时，所述功放芯片211不工作；当所述控制端引脚SHDN为低电平时，所述功放芯片211工作，所述智能终端主板13发出不同的音频控制信号即可控制所述功放芯片211的工作状态。
-电源引脚VDD
所述电源引脚VDD与所述音箱USB接口22的电源引脚连接，接收电源供电。当所述内置模块11控制所述智能终端USB接口12的电源通路时，也就控制向所述功放芯片211的供电状态，可以在不需要使用音频播放时断开电源，节省电耗。
所述音箱USB接口22在图4中为J101，具有5个引脚，与所述智能终端USB接口12的引脚对应。
参阅图5，为符合本发明一优选实施例中音频播放***30的结构框图，所述音频播放***30包括智能终端10和音箱20及上述音频电路。所述音频播放***30工作时，所述智能终端10和音箱20通过USB接口连接，所述智能终端10控制所述音箱20播放音频文件。
应当注意的是，本发明的实施例有较佳的实施性，且并非对本发明作任何形式的限制，任何熟悉该领域的技术人员可能利用上述揭示的技术内容变更或修饰为等同的有效实施例，但凡未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何修改或等同变化及修饰，均仍属于本发明技术方案的范围内。

Claims (10)

  1. 一种基于智能终端的音频电路，其特征在于，包括：
    内置模块，设于一智能终端内，与所述智能终端主板及USB接口连接，接收所述智能终端主板发出的控制信号及音频信号，根据所述控制信号的状态向所述智能终端USB接口转发所述音频信号；
    外置模块，设于一音箱内，通过所述音箱USB接口与所述智能终端连接，接收所述内置模块转发的音频信号并播放音频。
  2. 如权利要求1所述的音频电路，其特征在于，
    所述智能终端USB接口的电源引脚与所述智能终端的电池连接；
    当所述音箱工作时，所述外置模块通过所述音箱USB接口获取电源。
  3. 如权利要求2所述的音频电路，其特征在于，
    所述智能终端USB接口及所述音箱USB接口为Micro USB接口。
  4. 如权利要求3所述的音频电路，其特征在于，
    所述音箱USB接口的备用引脚通过一第一电阻接地；
    所述智能终端USB接口的备用引脚与所述智能终端主板的信号输入接口连接；
    当所述音箱与所述智能终端通过USB接口连接时，所述智能终端主板的信号输入接口检测到低电平后控制音频信号播放。
  5. 如权利要求1-4任一项所述的音频电路，其特征在于，
    所述内置模块包括：
    控制单元，接收所述智能终端主板发出的控制信号，控制所述智能终端USB接口的电源通路处于接通或断开状态；
    通道选择单元，与所述智能终端主板及所述控制单元连接，接收所述控制单元的控制信号后，选择所述智能终端主板发出的串行数据信号或音频信号连接至所述智能终端USB接口。
  6. 如权利要求5所述的音频电路，其特征在于，
    所述控制单元包括：
    第一开关管，所述第一开关管的输入端与所述智能终端的电池正极连接，所述第一开关管的输出端与智能终端USB接口的电源引脚连接，所述第一开关管的控制端通过一 第二电阻与所述电池正极连接；
    第二开关管，所述第二开关管的输入端与所述第一开关管的控制端及所述通道选择单元连接，所述第二开关管的输出端接地，所述第二开关管的控制端接收所述智能终端主板发出的控制信号；
    当所述控制信号为高电压状态时，所述第二开关管及第一开关管导通，所述智能终端USB接口的电源引脚由所述电池正极供电，所述通道选择单元选择音频信号连接至所述智能终端USB接口；
    当所述控制信号为低电压状态时，所述第二开关管及第一开关管截止，所述智能终端USB接口的电源引脚无供电电源，所述通道选择单元选择串行数据信号连接至所述智能终端USB接口。
  7. 如权利要求6所述的音频电路，其特征在于，
    所述通道选择单元包括：
    第一模拟开关，所述第一模拟开关的第一输入端与所述智能终端主板的正数据线连接，所述第一模拟开关的第二输入端与所述智能终端主板的音频信号线连接，所述第一模拟开关的输出端与所述智能终端USB接口的正数据线引脚连接，所述第一模拟开关的控制端与所述第二开关管的输入端连接；
    第二模拟开关，所述第二模拟开关的第一输入端与所述智能终端主板的负数据线连接，所述第二模拟开关的第二输入端与所述智能终端主板的音频控制信号连接，所述第二模拟开关的输出端与所述智能终端USB接口的负数据线引脚连接，所述第二模拟开关的控制端与所述第二开关管的输入端连接。
  8. 如权利要求7所述的音频电路，其特征在于，
    所述智能终端USB接口的正数据线引脚串接一RC滤波电路。
  9. 如权利要求1-4任一项所述的音频电路，其特征在于，
    所述外置模块为一功放芯片，包括：
    音频输入引脚，与所述音箱USB接口的正数据线引脚连接，接收音频信号；
    控制端引脚，与所述音箱USB接口的负数据线引脚连接，接收控制信号；
    电源引脚，与所述音箱USB接口的电源引脚连接，接收电源供电。
  10. 一种音频播放***，包括智能终端和音箱，其特征在于，
    所述音频播放***包括如权利要求1所述的音频电路。
PCT/CN2017/105988 2017-10-13 2017-10-13 一种基于智能终端的音频电路及音频播放*** WO2019071555A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2017/105988 WO2019071555A1 (zh) 2017-10-13 2017-10-13 一种基于智能终端的音频电路及音频播放***
CN201780095903.4A CN111247781B (zh) 2017-10-13 2017-10-13 一种基于智能终端的音频电路及音频播放***

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/105988 WO2019071555A1 (zh) 2017-10-13 2017-10-13 一种基于智能终端的音频电路及音频播放***

Publications (1)

Publication Number Publication Date
WO2019071555A1 true WO2019071555A1 (zh) 2019-04-18

Family

ID=66101135

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/105988 WO2019071555A1 (zh) 2017-10-13 2017-10-13 一种基于智能终端的音频电路及音频播放***

Country Status (2)

Country Link
CN (1) CN111247781B (zh)
WO (1) WO2019071555A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112073890A (zh) * 2020-09-11 2020-12-11 成都极米科技股份有限公司 音频数据处理方法、装置和终端设备
CN112087691A (zh) * 2020-09-23 2020-12-15 蒋宇超 一种利用前置音频信号的pc台式机内置音响
CN114125519A (zh) * 2021-11-01 2022-03-01 东莞市金锐显数码科技有限公司 语音控制电路及智能电视

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4523326B2 (ja) * 2004-04-23 2010-08-11 フォスター電機株式会社 音響システムおよびスピーカシステム
US20100229008A1 (en) * 2009-03-06 2010-09-09 Tsuoe-Hsiang Liao Sound Effect Power Supply Configuration
CN101917497A (zh) * 2010-07-23 2010-12-15 惠州Tcl移动通信有限公司 耳机和USB共用Micro-USB接口的方法及装置
CN102065160A (zh) * 2010-12-02 2011-05-18 惠州Tcl移动通信有限公司 一种利用手机外接扬声器的电路

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202444597U (zh) * 2011-11-09 2012-09-19 广东欧珀移动通信有限公司 一种耳机共用Micro USB接口电路
CN203912158U (zh) * 2014-01-26 2014-10-29 上海天奕达电子科技有限公司 一种usb和音频的复用线及蓝牙音箱电路
CN108028978B (zh) * 2015-06-04 2020-05-01 思睿逻辑国际半导体有限公司 音频连接器及电路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4523326B2 (ja) * 2004-04-23 2010-08-11 フォスター電機株式会社 音響システムおよびスピーカシステム
US20100229008A1 (en) * 2009-03-06 2010-09-09 Tsuoe-Hsiang Liao Sound Effect Power Supply Configuration
CN101917497A (zh) * 2010-07-23 2010-12-15 惠州Tcl移动通信有限公司 耳机和USB共用Micro-USB接口的方法及装置
CN102065160A (zh) * 2010-12-02 2011-05-18 惠州Tcl移动通信有限公司 一种利用手机外接扬声器的电路

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112073890A (zh) * 2020-09-11 2020-12-11 成都极米科技股份有限公司 音频数据处理方法、装置和终端设备
CN112073890B (zh) * 2020-09-11 2022-08-02 成都极米科技股份有限公司 音频数据处理方法、装置和终端设备
CN112087691A (zh) * 2020-09-23 2020-12-15 蒋宇超 一种利用前置音频信号的pc台式机内置音响
CN114125519A (zh) * 2021-11-01 2022-03-01 东莞市金锐显数码科技有限公司 语音控制电路及智能电视

Also Published As

Publication number Publication date
CN111247781B (zh) 2022-05-20
CN111247781A (zh) 2020-06-05

Similar Documents

Publication Publication Date Title
EP2597844B1 (en) Method and device for sharing micro-usb interface between earphone and usb
KR101405792B1 (ko) 휴대용 컴퓨팅 디바이스의 하이버네이션 동안의 액세서리로의 전력의 제공
US8719461B2 (en) Apparatus and method for controlling USB switching circuit in portable terminal
WO2017161746A1 (zh) 用户设备
WO2021082731A1 (zh) 一种电子设备及反向充电方法
TWI507974B (zh) 電子裝置、配件和偵測配件的方法
US20120300962A1 (en) Solar Powered Wireless Bluetooth Stereo Speaker With connectivity To MP3 Player
KR20140132660A (ko) 전자장치의 전원을 이용하여 능동소음제거 이어폰에 전원을 공급하는 방법 및 장치
US20180150118A1 (en) Capacitance based accessory connection detection for a battery powered unit
WO2019071555A1 (zh) 一种基于智能终端的音频电路及音频播放***
WO2018076628A1 (zh) 一种usb接口电路、终端、耳机电路及耳机、存储介质
CN212517830U (zh) 多功能转接装置
TW201246058A (en) All-in-one computer with speaker muting function
US20180338206A1 (en) Control method and control system for audio device
EP2129166A2 (en) Video/audio playing apparatus with wireless signal transmission function and wireless video/audio transmission module thereof
CN205040035U (zh) 一种小型化有/无线调度台
CN103596107A (zh) 多媒体mp3收音音响定时关停柔声处理技术装置及技术
US8655417B2 (en) Video/audio playing apparatus with wireless signal transmission function and wireless video/audio transmission module thereof
CN108966079B (zh) 音频装置的控制方法与***
CN211296823U (zh) 一种音频播放设备
TWI702854B (zh) 音頻播放裝置及音頻傳輸電路
US8983094B2 (en) All-in-one computer audio system
CN204046787U (zh) 可帮助睡眠的蓝牙音响装置
TWI599239B (zh) 擴音裝置、便攜式電子裝置及音頻播放組件
CN208445728U (zh) 一种多功能外置调声卡

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17928807

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17928807

Country of ref document: EP

Kind code of ref document: A1