CN207853992U - Audio device applied to smartphone TYPE-C interface - Google Patents

Abstract

The utility model discloses an audio device applied to a TYPE-C interface of a smart phone, comprising a smart phone, a first TYPE-C interface, a control module, a loudspeaker, a microphone, and buttons; the control module includes a second TYPE-C interface, a power supply Management, pattern recognition, USB interface, DAC converter, ADC converter, audio amplifier, filter and noise reducer, key recognition, key transmission, clock oscillator, power-on reset; smartphones communicate with the control module through the first TYPE‑C interface The second TYPE-C interface in the middle is connected and provides working power for the control module; the speaker is connected with the audio amplifier, and the microphone is connected with the filter noise reducer. Using the TYPE‑C interface of the smart phone to transmit digital audio signals can avoid the electromagnetic signal interference of the mobile phone, and has the advantage of clear sound quality; at the same time, the power of the smart phone is used to drive the speaker, which reduces the system cost.

Description

Audio device applied to smartphone TYPE-C interface

Technical field:

The utility model belongs to the field of communication transmission, in particular to an audio device applied to a TYPE-C interface of a smart phone.

Background technique:

The call headsets of existing smartphones are traditional round-hole plug headsets or bluetooth wireless communication headsets. Bluetooth wireless communication headsets have disadvantages such as needing an external battery for power supply, being susceptible to electromagnetic wave interference, high cost, and radiating to the human body. The audio signal of the traditional round-hole headset is easy to short-circuit to the ground wire during the plug-in process, and it is also susceptible to electromagnetic interference during phone calls, resulting in high noise and low call quality; in addition, the traditional round-hole headset jack also increases the thickness of the phone , which affects the design of mobile phones in a thinner direction; the traditional round hole headset jack is not waterproof.

The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and should not be considered as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art.

Utility model content:

The purpose of this utility model is to provide an audio device applied to the TYPE-C interface of a smart phone, thereby overcoming the above-mentioned defects in the prior art.

In order to achieve the above object, the utility model provides an audio device applied to a TYPE-C interface of a smart phone, comprising: a smart phone, a first TYPE-C interface, a control module, a loudspeaker, a microphone, and a button; the control module includes : Second TYPE-C interface, power management, mode recognition, USB interface, DAC converter, ADC converter, audio amplifier, filter noise reducer, key recognition, key transmission, clock oscillator, power-on reset; the intelligence The mobile phone is connected to the second TYPE-C interface in the control module through the first TYPE-C interface and provides working power for the control module; the speaker is connected to the audio amplifier in the control module, and the microphone is connected to the audio amplifier in the control module. The filter noise reducer is connected; the key is connected with the key identification.

Preferably, in the technical solution, the first TYPE-C interface and the second TYPE-C interface both include two sets of differential signals TX/RX, mode recognition signal CC, USB differential signal D+/D-, auxiliary signal SBU, power supply Vbus/GND, the mode identification signal CC is used to identify the working mode, and the power supply Vbus/GND signal line is used for the mobile phone to provide power to the audio device.

Preferably, in the technical solution, the DAC converter and the ADC converter adopt a Delta-Sigma algorithm, or a semi-flash structure, or a weighted resistance structure.

Preferably, in the technical solution, there are one or more speakers.

Preferably, in the technical solution, the speakers are various types of earphone speakers or external speakers.

Preferably, in the technical solution, the microphones are selected from various types of carbon grain microphones or liquid microphones or MEMS silicon microphones.

Preferably, in the technical solution, the clock oscillator can avoid using an external crystal oscillator or select an external crystal oscillator.

Preferably, in the technical solution, the audio amplifier is a Class A or Class AB or Class D or Class F audio amplifier circuit.

Preferably, in the technical solution, the keys include volume increase and decrease keys, up and down track selection keys, call answering keys, and pause keys.

Compared with the prior art, the utility model has the following beneficial effects:

Using the TYPE-C interface of the smart phone to transmit digital audio signals can avoid the electromagnetic signal interference of the mobile phone and has the advantage of clear sound quality; at the same time, the power of the smart phone is used to drive the speaker, which saves the external power supply and reduces the system cost; the control module The filter noise reducer can improve the clarity of the call; through the buttons, the volume can be increased or decreased, the up and down track selection, answering the call, pausing and other function controls can be realized; the mobile phone can remove the traditional round headset jack by using this solution, and realize the waterproof and thinner design of the mobile phone .

Description of drawings:

Fig. 1 is the structure diagram of the audio device applied to the TYPE-C interface of the smart phone according to the structure of the present invention;

Fig. 2 is the signal line definition diagram of the first TYPE-C interface and the second TYPE-C interface of the present utility model;

Explanation of main reference signs:

1-smartphone, 2-first TYPE-C interface, 3-control module, 4-speaker, 5-microphone, 6-button, 30-second TYPE-C interface, 31-USB interface, 32-DAC converter , 33-audio amplifier, 34-ADC converter, 35-filter noise reducer, 36-key transmission, 37-key recognition, 38-pattern recognition, 39-power management, 3a-clock oscillator, 3b-power-on reset .

Detailed ways:

The specific embodiments of the present utility model are described in detail below, but it should be understood that the protection scope of the present utility model is not limited by the specific embodiments.

Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

As shown in Figure 1, the audio device applied to the TYPE-C interface of a smart phone includes: a smart phone 1, a first TYPE-C interface 2, a control module 3, a loudspeaker 4, a microphone 5, and a button 6; the control module 3 Including the second TYPE-C interface 30, USB interface 31, DAC converter 32, audio amplifier 33, ADC converter 34, filter noise reducer 35, key transmission 36, key identification 37, mode identification 38, power management 39, clock Oscillator 3a, power-on reset 3b; The smart phone 1 is connected to the second TYPE-C interface 30 in the control module 3 through the first TYPE-C interface 2 and provides operating power for the control module 3; the speaker 4 is connected to the audio amplifier 33 in the control module 3, the microphone 5 is connected to the filter noise reducer 35 in the control module 3; the button 6 is connected to the button identification 37.

The DAC converter 33 and the ADC converter 34 adopt an anti-jamming circuit framework based on the Delta-Sigma algorithm, or a semi-flash structure, and a weighted resistance structure; the clock oscillator 3a can be free from an external crystal oscillator, or an external crystal oscillator can be selected for use; the audio amplifier 33 Select A-type or AB-type, D-type or F-type audio amplifier circuits; the TYPE-C interface supports positive and negative insertion functions, including two sets of differential signals TX/RX, mode recognition signal CC, USB differential signal D+/D- , Auxiliary signal SBU, power supply Vbus/GND and other signal lines, identify the working mode through the CC signal line, the working mode includes video transmission, power charging, data transmission, audio transmission and other functions, the mobile phone provides power to the audio device through Vbus and GND. Described loudspeaker 4 links to each other with the audio frequency amplifier 33 in the control module 3, and loudspeaker 4 selects the earphone loudspeaker of various models or puts out loudspeaker for use, and a plurality of loudspeakers can be set, to reach the effect of surround sound; Described microphone 5 and control module 3 The filter noise reducer 35 in the connection is connected, and the microphone 5 selects various types of carbon grain microphones or liquid microphones or MEMS silicon microphones; the button 6 is connected with the button recognition 37 and the button transmission 36 in the control module 3, and the button functions include volume Increase and decrease, up and down track selection, answering calls, playing pause and other functions.

When in use, connect the smart phone 1 to the control module 3 through the first TYPE-C interface 2, and the smart phone 1 will recognize the working mode according to the CC signal status of the first and second TYPE-C interfaces, and pass the Vbus interface and GND The interface provides power supply for the control module 3. When the smart phone 1 sends audio data to the speaker 4, the mode recognition module 38 recognizes the audio transmission working mode through the CC signals of the first and second TYPE-C interfaces, and passes the audio signal through the control The first and second TYPE-C interfaces of the module 3 are transmitted to the USB interface D+/D- differential signal, and then sent to the DAC converter 32, and after being amplified by the audio amplifier 33, it is output to the speaker 4; the DAC converter 32 and the speaker 4 can be multi-channel to achieve the effect of surround sound. When the audio collected by the microphone 5 is sent to the smart phone 1 , it is sent to the smart phone 1 through the filter noise reducer 35 and the ADC converter 34 . Button 6 realizes function control such as volume increase and decrease, up and down track selection, answering calls, and playback pause.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various exemplary embodiments of the present invention and various Different options and changes. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (9)

1. the audio devices applied to smart mobile phone TYPE-C interfaces, it is characterised in that：Including：Smart mobile phone, the first TYPE-C Interface, control module, loud speaker, microphone, button；The control module includes：2nd TYPE-C interfaces, power management, mould Formula identification, USB interface, DAC converter, ADC converters, audio-frequency amplifier, filtering denoiser, recognition by pressing keys, button transmission, when Clock oscillator, electrification reset；The smart mobile phone passes through the 2nd TYPE-C interfaces in the first TYPE-C interfaces and control module It connects and provides working power for the control module；The loud speaker is connected with the audio-frequency amplifier in control module, described Microphone is connect with the filtering denoiser in control module；The button is connect with recognition by pressing keys.

2. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：Described One TYPE-C interfaces and the 2nd TYPE-C interfaces include two groups of differential signal TX/RX, pattern-recognition signal CC, USB difference letter Number D+/D-, auxiliary signal SBU, power supply Vbus/GND, the pattern-recognition signal CC operating mode for identification, the power supply Vbus/GND signal wires provide power supply for mobile phone terminal to audio devices.

3. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：It is described DAC converter and ADC converters use Delta-Sigma algorithms or half flash architectures, weighted resistor structure.

4. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：It is described to raise Sound device is one or more.

5. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：It is described to raise Sound device selects the earphone horn or outgoing loudspeaker of various models.

6. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：The wheat The carbon granules microphone or liquid microphone or MEMS silicon microphone of gram various models of selection by winnowing.

7. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：When described Clock oscillator can be in order to avoid with external crystal oscillator or select external crystal oscillator.

8. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：The sound Audio amplifier selects A classes or AB classes or D classes or F class audio amplifier circuits.

9. the audio devices according to claim 1 applied to smart mobile phone TYPE-C interfaces, it is characterised in that：It is described to press Key includes volume increase and decrease button, upper and lower song selection key, the button that receives calls, pause button.