阅读说明：本技术 基于数字电位器的扩音器 (Megaphone based on digital potentiometer ) 是由 周勇军 于 2021-06-17 设计创作，主要内容包括：本申请公开了一种基于数字电位器的扩音器。包括：音频输入模块、前置放大器模块、数字电位器模块、功率放大器模块、扬声器模块、单片机模块、音量按键模块,所述音频输入模块、前置放大器模块、数字电位器模块、功率放大器模块、扬声器模块依次连接,所述音量按键模块通过所述单片机模块连接所述数字电位器模块。本申请通过单片机来输出调节电阻阻值的指令,开控制数字电位器调整扩音器内部的电阻阻值,实现对扩音器输出音量的精准调控,而且,单片机模块可以根据不同的应用场景设置不同的调节电阻阻值指令,使扩音器在不同的应用场景下直接输出相应的音量,使扩音器的音量控制更加精准,应用场景更加丰富,满足多种场合和场景的使用。(The application discloses a digital potentiometer based loudspeaker. The method comprises the following steps: the device comprises an audio input module, a preamplifier module, a digital potentiometer module, a power amplifier module, a loudspeaker module, a single chip microcomputer module and a volume key module, wherein the audio input module, the preamplifier module, the digital potentiometer module, the power amplifier module and the loudspeaker module are sequentially connected, and the volume key module is connected with the digital potentiometer module through the single chip microcomputer module. This application exports the instruction of adjusting resistance through the singlechip, open the inside resistance of control digital potentiometer adjustment megaphone, the realization is to the accurate regulation and control of megaphone output volume, moreover, single-chip module can set up different adjusting resistance instructions according to the applied scene of difference, make the corresponding volume of megaphone direct output under the applied scene of difference, the volume control that makes the megaphone is more accurate, the applied scene is abundanter, satisfy the use of multiple occasion and scene.)

1. A digital potentiometer-based loudspeaker, wherein the circuit comprises:

the device comprises an audio input module, a preamplifier module, a digital potentiometer module, a power amplifier module, a loudspeaker module, a singlechip module and a volume key module;

the audio input module acquires an externally input audio signal, wherein the audio signal comprises an analog audio signal and a digital audio signal, and sends the received audio signal to the preamplifier module;

the preamplifier module is connected with the audio input module, amplifies the received audio signal and sends the amplified audio signal to the digital potentiometer module;

the digital potentiometer module is connected with the power amplifier module and the singlechip module, receives a control instruction of the singlechip module, adjusts the resistance value of an adjusting resistor in the digital potentiometer module, and realizes volume adjustment of a received audio signal;

the power amplifier module is connected with the digital potentiometer module and is used for receiving the audio signal subjected to volume adjustment by the digital potentiometer module, amplifying the audio signal under the set power amplification parameter and outputting the amplified audio signal to the loudspeaker module;

the loudspeaker module is used for converting the audio signal sent by the power amplifier module into an analog signal and then playing the analog signal;

the single chip microcomputer module is connected with the digital potentiometer module and the volume key module, converts an analog signal of volume adjustment input by the volume key module into a digital signal, adjusts an output instruction for controlling the resistance value of the digital potentiometer module according to the signal input by the volume key module, and controls the digital potentiometer module to adjust the resistance value according to the instruction;

the volume key module acquires an analog signal through a key button and sets a resistance value signal of the adjusting resistor of the single chip microcomputer module according to a set adjusting step length.

2. The microphone based on the digital potentiometer according to claim 1, wherein the single chip microcomputer module comprises a storage unit, the storage unit stores the instructions for setting the resistance values of the resistors in different modes, and directly outputs the corresponding instructions for adjusting the resistance values of the resistors when the corresponding modes are selected, so that the digital potentiometer module is controlled to adjust the corresponding resistance values.

3. The digital potentiometer based loudspeaker according to claim 1, wherein the audio input module comprises a microphone for receiving external voice information and converting an analog signal of the voice information into a digital signal.

Technical Field

The present disclosure relates generally to the field of potentiometer technology, and more particularly to a digital potentiometer based loudspeaker.

Background

In prior art, the loudspeaker generally uses outside knob to adjust inside sliding resistance and adjusts the output volume, and the volume that this kind of mode was adjusted the loudspeaker is accurate inadequately, can not remember moreover, can not remember to the volume size that people used commonly, influences people's auditory effect, can not set for the scene volume according to the use scene, and the scene effect of use is good inadequately.

Therefore, it is desirable to have a digital potentiometer based loudspeaker that solves the problems of the prior art.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a digital potentiometer-based microphone that can meet the current requirements of multi-scene applications of microphones.

According to an aspect of the embodiments of the present invention, an embodiment of the present application provides a digital potentiometer-based microphone, including:

the device comprises an audio input module, a preamplifier module, a digital potentiometer module, a power amplifier module, a loudspeaker module, a singlechip module and a volume key module;

the audio input module acquires an externally input audio signal, wherein the audio signal comprises an analog audio signal and a digital audio signal, and sends the received audio signal to the preamplifier module;

the preamplifier module is connected with the audio input module, amplifies the received audio signal and sends the amplified audio signal to the digital potentiometer module;

the digital potentiometer module is connected with the power amplifier module and the singlechip module, receives a control instruction of the singlechip module, adjusts the resistance value of an adjusting resistor in the digital potentiometer module, and realizes volume adjustment of a received audio signal;

the power amplifier module is connected with the digital potentiometer module and is used for receiving the audio signal subjected to volume adjustment by the digital potentiometer module, amplifying the audio signal under the set power amplification parameter and outputting the amplified audio signal to the loudspeaker module;

the loudspeaker module is used for converting the audio signal sent by the power amplifier module into an analog signal and then playing the analog signal;

the single chip microcomputer module is connected with the digital potentiometer module and the volume key module, converts an analog signal of volume adjustment input by the volume key module into a digital signal, adjusts an output instruction for controlling the resistance value of the digital potentiometer module according to the signal input by the volume key module, and controls the digital potentiometer module to adjust the resistance value according to the instruction;

the volume key module acquires an analog signal through a key button and sets a resistance value signal of the adjusting resistor of the single chip microcomputer module according to a set adjusting step length.

In one embodiment, the single chip microcomputer module comprises a storage unit, the storage unit stores the instructions for setting the resistance values of the resistors in different modes, and directly outputs the corresponding instructions for adjusting the resistance values when the corresponding mode is selected, so that the digital potentiometer module is controlled to adjust the corresponding resistance values.

In one embodiment, the audio input module comprises a sound pickup for receiving external voice information and converting analog signals of the voice information into digital signals.

In this application embodiment, export the instruction of adjusting resistance through the singlechip, turn on the inside resistance of control digital potentiometer adjustment megaphone, the realization is to the accurate regulation and control of megaphone output volume, moreover, single chip module can set up different adjusting resistance instructions according to the applied scene of difference, make the corresponding volume of megaphone direct output under the applied scene of difference, the volume control that makes the megaphone is more accurate, the applied scene is abundanter, satisfy the use of multiple occasion and scene.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic diagram of an exemplary structure of a digital potentiometer-based microphone according to an embodiment of the present application.

In the figure, an audio input module 1, a preamplifier module 2, a digital potentiometer module 3, a power amplifier module 4, a loudspeaker module 5, a singlechip module 6 and a volume key module 7 are arranged.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1, as shown in fig. 1, the digital potentiometer based microphone includes:

the device comprises an audio input module 1, a preamplifier module 2, a digital potentiometer module 3, a power amplifier module 4, a loudspeaker module 5, a singlechip module 6 and a volume key module 7;

the audio input module 1 acquires an externally input audio signal, wherein the audio signal comprises an analog audio signal and a digital audio signal, and sends the received audio signal to the preamplifier module;

the preamplifier module 2 is connected with the audio input module 1, and the preamplifier module 2 amplifies the received audio signal and sends the amplified audio signal to the digital potentiometer module 3;

the digital potentiometer module 3 is connected with the power amplifier module 4 and the single chip microcomputer module 6, the digital potentiometer module 3 receives a control instruction of the single chip microcomputer module 6, and adjusts the resistance value of an adjusting resistor in the digital potentiometer module 3 to realize volume adjustment of a received audio signal;

the power amplifier module 4 is connected to the digital potentiometer module 3, and is configured to receive an audio signal subjected to volume adjustment by the digital potentiometer module 3, amplify the audio signal under a set power amplification parameter, and output the amplified audio signal to the speaker module 5;

the loudspeaker module 5 is used for converting the audio signal sent by the power amplifier module 4 into an analog signal and then playing the analog signal;

the single chip microcomputer module 6 is connected with the digital potentiometer module 3 and the volume key module 7, the single chip microcomputer module 6 converts the analog signal of volume adjustment input by the volume key module 7 into a digital signal, adjusts an output instruction for controlling the resistance value of the digital potentiometer module 3 according to the signal input by the volume key module 7, and controls the digital potentiometer module 3 to adjust the resistance value according to the instruction;

the volume key module 7 acquires an analog signal through a key button, and sets a resistance value adjusting signal of the singlechip module 6 according to a set adjusting step length.

The single chip microcomputer module 6 comprises a storage unit, the storage unit stores the resistance value adjusting instructions of the set different modes, and directly outputs the corresponding resistance value adjusting instructions when the corresponding mode is selected, so that the digital potentiometer module 3 is controlled to adjust the corresponding resistance value.

The audio input module 1 includes a sound pickup for receiving external voice information and converting an analog signal of the voice information into a digital signal.

In this application embodiment, export the instruction of adjusting resistance through the singlechip, turn on the inside resistance of control digital potentiometer adjustment megaphone, the realization is to the accurate regulation and control of megaphone output volume, moreover, single chip module can set up different adjusting resistance instructions according to the applied scene of difference, make the corresponding volume of megaphone direct output under the applied scene of difference, the volume control that makes the megaphone is more accurate, the applied scene is abundanter, satisfy the use of multiple occasion and scene.

The units or modules described in the embodiments of the present application may be implemented by software or hardware. The described units or modules may also be provided in a processor. The names of these units or modules do not in some cases constitute a limitation of the unit or module itself.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.