CN213280015U

CN213280015U - Audio circuit and multifunctional sound box using same

Info

Publication number: CN213280015U
Application number: CN202022543529.1U
Authority: CN
Inventors: 陈燕山
Original assignee: Guizhou Jialai Intelligent Technology Co ltd
Current assignee: Guizhou Jialai Intelligent Technology Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-05-25
Anticipated expiration: 2030-11-05

Abstract

The utility model discloses an audio circuit and applied this audio circuit's multi-functional audio amplifier, this circuit includes: carry out recording/power amplifier output module, power supply/the module of charging of enlargiing, storage and power amplifier output to audio signal input, carry out audio processing module, digital/analog live broadcast circuit module and earphone output module of resampling, gain adjustment, audio mixing, audio processing to input signal, electrical connection between above-mentioned each module, the utility model discloses the beneficial technological effect who possesses is: the portable charging device can be charged at any time and is convenient to carry, and the requirements of users on sound equipment in different occasions are met; the multifunctional music player has the advantages that the playing function is realized, the sound effect processing capacity is high, the audio circuit has a strong line input function and audio processing capacity, analog/digital live broadcasting and Bluetooth accompaniment can be carried out, and the multifunctional effect of one player is realized.

Description

Audio circuit and multifunctional sound box using same

Technical Field

The utility model relates to a circuit and audio amplifier especially relate to an audio circuit and applied this audio circuit's multi-functional audio amplifier.

Background

With the improvement of living standard of people, the problem of single function of the sound box in the prior art is more prominent, and the audio-visual experience requirement of a sound box user which is growing day by day cannot be met, so that the problem needs to be improved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an audio circuit and applied this audio circuit's multi-functional audio amplifier solves the shortcoming regret that prior art exists.

The utility model discloses a following technical scheme realizes:

an audio circuit, comprising: recording/power amplifier output module, power supply/module of charging, audio processing module, digital/analog live broadcast circuit module and earphone output module, electrical connection between above-mentioned each module, wherein:

the recording/power amplifier output module is used for amplifying audio signal input, processing audio and outputting power amplifier;

the power supply/charging module is used for supplying power to the circuit and charging the battery;

the audio processing module is used for carrying out resampling, gain adjustment, sound mixing and sound effect processing on an input signal;

the digital/analog live broadcast circuit module is used for providing a USB OTG interface to realize data interaction of the master-slave equipment.

Furthermore, an audio power amplification chip and a peripheral circuit thereof are arranged in the recording/power amplifier output module, the output end of the audio power amplification chip is connected with the high-frequency signal output end and the low-frequency signal output end of the audio circuit, the output end of the audio power amplification chip is respectively connected with the high-frequency loudspeaker and/or the low-frequency loudspeaker through an inductor, the audio power amplification chip is connected with a mute switch, and the other end of the mute switch is grounded.

Furthermore, a recording adjusting module and a recording output port are arranged in the recording/power amplifier output module.

Furthermore, a voltage stabilizing circuit and/or a battery charging circuit are arranged in the power supply/charging module, a voltage stabilizing chip and a peripheral circuit thereof are arranged in the voltage stabilizing circuit, the voltage stabilizing circuit is connected with the input end of a VDD power supply and the ground, the output end of the voltage stabilizing circuit outputs 12V/5.0V/3.3V voltage, and a voltage stabilizing diode and a resistor are arranged in the battery charging circuit.

Furthermore, the audio processing module comprises an audio processing chip and a peripheral circuit thereof, the peripheral circuit of the audio processing chip comprises an analog/digital live broadcast input end, the analog/digital live broadcast input end is connected with the audio processing chip through a balance amplifier, and the audio processing chip is respectively connected with low-frequency output and high-frequency output.

Further, the audio processing chip is connected with the microprocessor chip and the Hash algorithm chip.

Furthermore, the digital/analog live broadcast circuit module comprises an OTG interface end and an analog live broadcast end, and the analog live broadcast end is connected with the recording input interface end and the live broadcast output interface end.

Furthermore, an earphone output interface end and a line output interface end are arranged in the earphone output module.

Furthermore, a single chip microcomputer and a peripheral circuit thereof are arranged in the power supply/charging module and used for detecting/controlling the charging current state and controlling the electric quantity indication, and the power supply/charging module has the function of charging indication.

A multifunctional sound box is characterized in that the multifunctional sound box comprises an audio circuit.

The utility model discloses the beneficial technological effect who possesses is: the portable charging device can be charged at any time and is convenient to carry, and the requirements of users on sound equipment in different occasions are met; the multifunctional music player has the advantages that the playing function is realized, the sound effect processing capacity is high, the audio circuit has a strong line input function and audio processing capacity, analog/digital live broadcasting and Bluetooth accompaniment can be carried out, and the multifunctional effect of one player is realized.

Drawings

Fig. 1 is one of the schematic circuit block diagrams of the recording/power amplifier output module.

Fig. 2 is a second schematic circuit block diagram of the recording/power amplifier output module.

Fig. 3 is one of the schematic block circuits of the power supply/charging module.

Fig. 4 is a second schematic block diagram of the circuit of the power supply/charging module.

Fig. 5 is a circuit schematic block diagram of an audio processing module.

Fig. 6 is a circuit schematic block diagram of a digital/analog live circuit module.

Fig. 7 is a schematic block circuit diagram of the earphone output module.

Detailed Description

The following description of the embodiments will help the public to understand the present invention, but the specific embodiments given by the applicant should not be considered as limiting the technical solution of the present invention, and any changes in the definition of the components or technical features and/or in the form of the overall structure rather than substantial changes should be considered as the protection scope defined by the technical solution of the present invention.

As shown in the figure, the embodiment discloses an audio circuit and a multifunctional sound box using the audio circuit, and the audio circuit comprises: recording/power amplifier output module, power supply/charge module, audio processing module, digital/analog live broadcast circuit module and earphone output module, wherein: the audio recording/power amplifier output module is used for amplifying, storing and outputting audio signals, the power supply/charging module is used for providing power for a circuit and charging a battery, the audio processing module is used for resampling, gain adjustment, sound mixing and sound effect processing of the input signals, the digital/analog live broadcast circuit module is used for providing a USB OTG interface to realize data interaction of master-slave equipment, the earphone output module is used for providing earphone audio output, and the modules are electrically connected. The electrical connection relationship described above is only schematic in view of the overall circuit architecture and the structure of the sound box in this patent, wherein the units illustrated as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment, and those skilled in the art can understand and implement the embodiments without creative efforts.

As shown in fig. 1 and 2, an audio power amplifier chip and its peripheral circuits are disposed in the recording/power amplifier output module, an input end of the audio power amplifier chip is connected to a high-frequency signal output end and a low-frequency signal output end of the audio circuit, an output end of the audio power amplifier chip is connected to a high-frequency speaker and/or a low-frequency speaker through an inductor, respectively, the audio power amplifier chip is connected to a mute switch, and the other end of the mute switch is grounded. In this embodiment, the model of the audio power amplifier chip is TPA3116, and the TPA3116 is used to drive a high-efficiency stereo digital amplifier of a speaker. One end of the device U3 is connected with an input signal SIG, the other end of the device U3 is connected with the power amplifying circuit and the adjustable resistor REC _ VOL and is connected with the device U5, and the device U5 is connected with the recording output end REC OUT.

As shown IN fig. 3 and 4, a recording adjusting module and a recording output port are disposed IN the recording/power amplifier output module, a voltage stabilizing circuit and/or a battery charging circuit are disposed IN the power supply/charging module, a voltage stabilizing chip and a peripheral circuit thereof are disposed IN the voltage stabilizing circuit, the peripheral circuit includes an output terminal DC _ IN, a device Q2, and a device U16, the voltage stabilizing circuit is connected to a VDD power input terminal and the ground, an output terminal of the voltage stabilizing circuit outputs 12V/5V/3.3V, and a zener diode and a resistor are disposed IN the battery charging circuit. The device U16 has the function of detecting/controlling the charging state and the charging current, and the singlechip controls the electric quantity indication and the charging indication.

As shown in fig. 5, the audio processing module includes an audio processing chip and its peripheral circuits, in this embodiment, the type of the audio processing chip is ADAU1701, and the ADAU1701 is a complete single-chip audio system including 28/56bit audio DSP, ADC, DAC and control interfaces of similar microcontrollers. Signal processing including balancing, mixing, bass enhancement, multi-band dynamic processing, delay compensation, stereo image extension, etc. can compensate for real-world limitations of speakers, amplifiers, and listening environments, and dynamically improve perceived audio quality. The signal processing of ADAU1701 is comparable to that of a high-end stereo. Most of the processing is done by the full 56bit double precision mode, thus resulting in very good low level signal performance. The ADAU1701 is a fully programmable digital signal processor. The easy-to-use SigmaStudio software allows a user to graphically configure a user-customized signal processing flow by means of biquad filters, dynamic processors, level control, general purpose GPIO interface control, and the like. The ADAU1701 program can be electrically loaded from a serial EEPROM (through its bootstrap mechanism) or from an external microcontroller. During power-up, the current parameter state may be written back from the ADAU1701 to the EEPROM for recall the next time the program is run. The analog/digital live broadcast input end is connected with an audio processing chip through an equalizing amplifier, a pin LP and a pin HP of the audio processing chip are respectively connected with a low-frequency output and a high-frequency output, and the audio processing chip is connected with a microprocessor chip U19 and a Hash algorithm chip U18.

As shown in fig. 6, the digital/analog live broadcast circuit module includes an OTG interface terminal and an analog live broadcast terminal, where the analog live broadcast terminal is connected to the recording input interface terminal and the live broadcast output interface terminal, and also includes an analog/digital live broadcast input terminal, an OTG interface, a device U2, and a device U4, where the device U4 is a flash memory. USB OTG is an abbreviation of USB On-The-Go, and The purpose of OTG is to enable data transfer between devices without Host. The OTG standard adds a power management (power consumption saving) function on the basis of being fully compatible with the USB2.0 standard, which allows the device to operate as both a host and a peripheral (dual-purpose OTG). The USB OTG technology can realize data transmission between equipment without a host.

As shown in fig. 7, the headphone output module is provided with a headphone output interface end and a line output interface end. The input end of the earphone output module is connected with signal ends SIG and output ends OTG-OUT of other circuit modules, the earphone output module utilizes an adjustable resistor to adjust earphone volume, one end of the adjustable resistor is connected with a device U8C, the other end of the adjustable resistor is connected with a device U8A and a device U22, the number of the devices U22 is two, the two devices are respectively connected with an earphone left sound channel L and an earphone right sound channel R, and the device U8A is further connected with a Line output end Line-OUT.

Of course, the present invention can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims

1. An audio circuit, comprising: recording/power amplifier output module, power supply/module of charging, audio processing module, digital/analog live broadcast circuit module and earphone output module, electrical connection between above-mentioned each module, wherein:

2. The audio circuit according to claim 1, wherein an audio power amplifier chip and its peripheral circuits are disposed in the recording/power amplifier output module, an input end of the audio power amplifier chip is connected to a high frequency signal output end and a low frequency signal output end of the audio circuit, an output end of the audio power amplifier chip is respectively connected to the high frequency speaker and/or the low frequency speaker through an inductor, the audio power amplifier chip is connected to a mute switch, and another end of the mute switch is grounded.

3. The audio circuit according to claim 1, wherein a recording adjusting module and a recording output port are disposed in the recording/power amplifying output module.

4. The audio circuit according to claim 1, wherein a voltage regulator circuit and/or a battery charging circuit are disposed in the power supply/charging module, the voltage regulator circuit is disposed with a voltage regulator chip and its peripheral circuits, the voltage regulator circuit is connected to the VDD power input terminal and the ground, the output terminal of the voltage regulator circuit outputs 12V/5.0V/3.3V, and the battery charging circuit is disposed with a voltage regulator diode and a resistor.

5. The audio circuit according to claim 1, wherein the audio processing module comprises an audio processing chip and its peripheral circuits, the peripheral circuits of the audio processing chip comprise analog/digital live broadcast input terminals, the analog/digital live broadcast input terminals are connected to the audio processing chip through an equalizer amplifier, and the audio processing chip is connected to the low frequency output and the high frequency output respectively.

6. The audio circuit of claim 5, wherein the audio processing chip is coupled to the microprocessor chip and the hash algorithm chip.

7. The audio circuit according to claim 1, wherein the digital/analog live broadcast circuit module includes an OTG interface terminal and an analog live broadcast terminal, and the analog live broadcast terminal is connected to the recording input interface terminal and the live broadcast output interface terminal.

8. The audio circuit according to claim 1, wherein the headphone output module has a headphone output interface terminal and a line output interface terminal provided therein.

9. The audio circuit according to claim 1, wherein a single chip and its peripheral circuits are disposed in the power supply/charging module, and are configured to detect/control the charging current status and control the indication of the electric quantity, and have a function of charging indication.

10. A multi-function sound box characterized by comprising the audio circuit of claim 1.