CN217789891U

CN217789891U - Double-microphone noise reduction and ear return module for type-C type usb interface expansion

Info

Publication number: CN217789891U
Application number: CN202220670334.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: Guangzhou Yougu Information Technology Co ltd
Current assignee: Guangzhou Yougu Information Technology Co ltd
Priority date: 2022-03-26
Filing date: 2022-03-26
Publication date: 2022-11-11
Anticipated expiration: 2032-03-26

Abstract

The utility model discloses a two wheat of type-C type usb interface extension are fallen and make an uproar and ear return module relates to and falls the technical field of making an uproar. The novel microphone comprises a USB male head, the USB male head is connected with a data connector through a data line in a telecommunication mode, the data connector is connected with an electric control module board in a telecommunication mode, an earphone interface is installed on the electric control module board, a board body and an installation shell are wrapped outside the electric control module board, an auxiliary microphone device is installed on the electric control module board, and a through hole corresponding to the position of the auxiliary microphone device is formed in the installation shell. This type-C type USB interface extension's two wheat fall make an uproar with the ear return the module, socket end output 5V's voltage supplies power for electronic control module, need not to use external power supply power, through USB audio chip U3, can let cell-phone or pad pass through the USB interface, realizes 2 way left and right headphone analog output and 1 way two wheat analog input of making an uproar, has reduced the noise in the audio data to a great extent, and can realize the effect that the ear returned.

Description

Double-microphone noise reduction and ear return module for type-C type usb interface expansion

Technical Field

The utility model relates to a technical field of making an uproar falls specifically is a two wheat of type-C type usb interface extension fall make an uproar and ear return module.

Background

If 3.5mm earphones and microphones need to be connected with a switching module externally, the switching module in the current market can not realize the functions of dual-microphone noise reduction and ear return, only a USB interface is converted into 3.5mm, and the conversion from digital to analog interfaces is simply realized, the noise reduction performance of the existing single microphone is lower, particularly on non-stable random noise, the use of the existing single microphone is not facilitated for a user, and the 3.5mm earphones of a standard interface only have 1 microphone, so that the dual-microphone noise reduction can not be realized; in view of this, we propose a dual-microphone noise reduction and ear return module with a type-C type usb interface expansion.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a two wheat of type-C type usb interface extension are fallen and make an uproar and ear return module has solved the problem that above-mentioned background art mentioned.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a double-microphone noise reduction and ear return module with a type-C type USB interface expansion comprises a USB male head, wherein the USB male head is in telecommunication connection with a data connector through a data line, the data connector is in telecommunication connection with an electric control module board, an earphone interface is installed on the electric control module board, the electric control module board is wrapped by a board body and an installation shell, an auxiliary microphone device is installed on the electric control module board, and a through hole corresponding to the auxiliary microphone device is formed in the installation shell;

the electronic control module board is provided with an electronic control module, and the electronic control module comprises a USB and interface circuit, a USB audio circuit, a microphone amplifying and mixing circuit, a main microphone volume adjusting circuit and a double-microphone noise reduction processing circuit.

Preferably, the USB and interface circuit inputs 5V voltage through a USB male connector, and the USB and interface circuit includes two sets of communication lines, a DP line and a DM line.

Preferably, the USB audio circuit includes a USB audio chip U3, and

pins

5 and 6 of the chip U3 are respectively in electrical communication connection with the DP line and the DM line.

Preferably, the microphone amplifying and mixing circuit comprises an HPOUT L terminal and an HPOUT R terminal, and the HPOUT L terminal and the HPOUT R terminal are respectively in telecommunication connection with a pin 31 and a pin 30 of the USB audio chip U3.

Preferably, the USB and interface circuit includes a MICP R terminal, a MICN L terminal, and a MICP L terminal.

Preferably, the dual-microphone noise reduction processing circuit comprises a noise reduction chip U2,

pins

1 and 2 of the noise reduction chip U2 are respectively in electrical connection with a DP line and a DM line, pins 11 of the noise reduction chip U2 are in electrical connection with an MICP R terminal, pins 12 of the noise reduction chip U2 are in electrical connection with an MICN R terminal, pins 13 of the noise reduction chip U2 are in electrical connection with an MICN L terminal, and pins 14 of the noise reduction chip U2 are in electrical connection with an MICP L terminal.

(III) advantageous effects

The utility model provides a two wheat of type-C type usb interface extension are fallen and make an uproar and ear return module. The method has the following beneficial effects:

(1) This type-C type USB interface extension's two wheat fall make an uproar and ear return the module, 5V's of socket end output voltage supplies power for electronic control module, need not to use external power source power supply, through USB audio chip U3, can let cell-phone or pad pass through the USB interface, realize 2 way left and right earphone analog output and 1 way two wheat analog input of making an uproar that fall, reduced the noise in the audio data to a great extent, and can realize the effect that the ear returned.

(2) The module is returned with the ear to the two wheat of this type-C type usb interface extension of making an uproar falls, only can realize simultaneously through a converting line that two wheat fall the noise and the module is returned to the ear, and the person of facilitating the use goes out to carry the use, has promoted user's use impression.

Drawings

FIG. 1 is a schematic diagram of the USB and interface circuit of the present invention;

FIG. 2 is a schematic diagram of a USB audio circuit of the present invention;

fig. 3 is a schematic diagram of a microphone amplifying and mixing circuit of the present invention;

fig. 4 is a schematic diagram of the main microphone volume adjusting circuit of the present invention;

fig. 5 is a schematic diagram of the noise reduction processing circuit of the dual microphone of the present invention;

fig. 6 is a schematic view of the overall structure of the present invention.

In the figure: 1. a plate body; 2. an earphone interface; 3. a secondary wheat device; 4. an electronic control module board; 5. mounting a shell; 6. a data connector; 7. USB male.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a two wheat of type-C type USB interface extension fall make an uproar and ear return module, including the public head of USB 7, the public head of USB 7 has data connector 6 through data line telecommunications connection, data connector 6 and electric control module board 4 telecommunications connection, install earphone interface 2 on the electric control module board 4, and the outer parcel of electric control module board 4 has plate body 1 and installation shell 5, install vice wheat device 3 on the electric control module board 4, and set up the through-hole corresponding with vice wheat device 3 position on the installation shell 5, the through-hole is used for the propagation of sound.

In this embodiment, the electronic control module board 4 is provided with an electronic control module, and the electronic control module includes a USB and interface circuit, a USB audio circuit, a microphone amplifying and mixing circuit, a main microphone volume adjusting circuit, and a dual-microphone noise reduction processing circuit.

The USB and interface circuit inputs 5V voltage through a USB male connector 7, and comprises two groups of communication lines, namely a DP line and a DM line. The USB audio circuit comprises a USB audio chip U3, and

pins

5 and 6 of the chip U3 are respectively in electric communication connection with the DP line and the DM line. The microphone amplifying and mixing circuit comprises an HPOUT L end and an HPOUT R end, and the HPOUT L end and the HPOUT R end are respectively in telecommunication connection with a pin 31 and a pin 30 of the USB audio chip U3. The USB audio chip U3 is SSS1700QFN36.

The USB and interface circuit comprises a MICP R terminal, a MICN L terminal and a MICN L terminal. The double-microphone noise reduction processing circuit comprises a noise reduction chip U2, wherein a pin 1 and a pin 2 of the noise reduction chip U2 are respectively in electrical communication connection with a DP line and a DM line, a pin 11 of the noise reduction chip U2 is in electrical communication connection with an MICP R end, a pin 12 of the noise reduction chip U2 is in electrical communication connection with an MICN R end, a pin 13 of the noise reduction chip U2 is in electrical communication connection with an MICN L end, and a pin 14 of the noise reduction chip U2 is in electrical communication connection with an MICP L end.

When the USB audio/video interface works (or is used), a user butt joints the USB male connector 7 to the socket end of the mobile phone or the pad, the socket end outputs 5V voltage to supply power to the electronic control module without using an external power supply, and USB communication wires are 2 wires with networks being DP and DM and are connected to the USB audio chip U3.

After the electric control module is powered on, a mobile phone or a pad can realize 2-path left and right earphone analog output and 1-path double microphone noise reduction analog input through a USB interface by a USB audio chip U3. The output path is: the USB digital signal containing audio is converted into analog output through HPOUT _ L/R of a USB audio chip U3, and is output to an EAR-L network and an EAR-R network through a chip U5A EAR discharge circuit and a chip U5B EAR discharge circuit, and finally is output to an earphone interface 2. The input path is as follows: the main microphone on the 3.5mm earphone is accessed through MIC _ L _ IN of the earphone interface 2 and a ground network, and is connected to MICP _ L _ IN through C11, C7 and R4 are connected to MICN _ L _ IN, and after the volume is proportionally adjusted through R3/R29 (R34/R33) IN the main microphone volume adjusting circuit of FIG. 4, the main microphone is output to the network MICP _ L and enters into the noise reduction chip U2, while the reference signal MICN _ L is grounded through C73, the auxiliary microphone device 3 on the electric control module board 4 is accessed through

pins

1 and 2 of J2, is connected to the network MICP _ R/MICN _ R through C2 and C3, and is finally connected to the noise reduction chip U2, the signals of the main microphone and the auxiliary microphone device 3 are output after passing through HPOUT _ L _ P/N of the noise reduction chip U2 and are connected to the USB audio chip U3 through C36/38, and the USB audio chip U3 records the microphone signal after noise reduction through pins P23/24 and transmits to the PAD signal of the USB audio chip U2, thereby realizing the double noise reduction function.

The EAR return only feeds back the main microphone signal, the auxiliary microphone signal is not fed back, the main microphone signal is output to MICP/N _ L _ IN, amplified by 10 times through the U6B operational amplifier signal and output to C54 and C62, then mixed with HPOUT _ L/R through the U5 EAR amplifier circuit and output to an EAR-L/R network, and synchronously output to a 3.5mm earphone interface, so that the EAR return function is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a two wheat of type-C type usb interface extension are fallen and ear return module, its characterized in that: the microphone comprises a USB male head (7), wherein the USB male head (7) is in telecommunication connection with a data connector (6) through a data line, the data connector (6) is in telecommunication connection with an electric control module board (4), an earphone interface (2) is installed on the electric control module board (4), the electric control module board (4) is wrapped by a board body (1) and an installation shell (5), an auxiliary microphone device (3) is installed on the electric control module board (4), and a through hole corresponding to the auxiliary microphone device (3) is formed in the installation shell (5);

the electronic control module board (4) is provided with an electronic control module, and the electronic control module comprises a USB and interface circuit, a USB audio circuit, a microphone amplifying and mixing circuit, a main microphone volume adjusting circuit and a double-microphone noise reduction processing circuit.

2. The dual-microphone noise reduction and ear return module of type-C type usb interface extension of claim 1, wherein: the USB and interface circuit inputs 5V voltage through a USB male connector (7), and comprises two groups of communication lines, namely a DP line and a DM line.

3. The dual-microphone noise reduction and ear return module with the type-C usb interface extension according to claim 2, wherein: the USB audio circuit comprises a USB audio chip U3, and pins 5 and 6 of the chip U3 are respectively in electric communication connection with the DP line and the DM line.

4. The dual-microphone noise reduction and ear return module of type-C type usb interface extension of claim 3, wherein: the microphone amplifying and mixing circuit comprises an HPOUT L end and an HPOUT R end, and the HPOUT L end and the HPOUT R end are respectively in telecommunication connection with a pin 31 and a pin 30 of a USB audio chip U3.

5. The dual-microphone noise reduction and ear return module of type-C type usb interface extension of claim 1, wherein: the USB and interface circuit comprises a MICP R end, a MICN L end and a MICP L end.

6. The dual-microphone noise reduction and ear return module of type-C type usb interface extension of claim 5, wherein: the dual-microphone noise reduction processing circuit comprises a noise reduction chip U2, wherein 1 pin and 2 pins of the noise reduction chip U2 are respectively in electric communication connection with a DP line and a DM line, 11 pins of the noise reduction chip U2 are in electric communication connection with an MICP R end, 12 pins of the noise reduction chip U2 are in electric communication connection with an MICN R end, 13 pins of the noise reduction chip U2 are in electric communication connection with an MICN L end, and 14 pins of the noise reduction chip U2 are in electric communication connection with an MICP L end.