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Device and equipment for amplifying audio signal

An audio signal and signal technology, applied in the field of audio signal processing, can solve the problems of complex control method and high cost, and achieve the effect of simple control principle, low cost and stable circuit

Pending Publication Date: 2020-08-04
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that this control method is complex and costly, and is not suitable for non-professional audio experience occasions such as car microphones and handheld walkie-talkies.

Method used

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  • Device and equipment for amplifying audio signal
  • Device and equipment for amplifying audio signal
  • Device and equipment for amplifying audio signal

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Embodiment Construction

[0022] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present specification as recited in the appended claims.

[0023] The terms used in this specification are for the purpose of describing particular embodiments only, and are not intended to limit the specification. As used in this specification and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the t...

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Abstract

The pretransmitted specification provides a device and equipment for amplifying an audio signal. The device comprises an amplification unit, a feedback unit, a detection unit and a voltage control unit, wherein the amplification unit is used for amplifying an audio input signal and outputting an audio output signal; the amplification unit comprises a first input end and a second input end; the feedback unit is used for amplifying the audio output signal based on a preset amplification parameter and outputting a generated feedback gain signal to the detection unit; the detection unit is used for carrying out detection processing on the feedback gain signal to obtain an envelope signal; and the voltage control unit is used for adjusting input resistance of the second input end of the amplification unit according to the amplitude of the envelope signal, so as to adjust the amplification gain of the amplification unit. According to the device for amplifying the audio signal, the amplification gain of the amplification unit can be automatically and rapidly adjusted, the control principle is simple, the circuit is stable, the cost is low, and the device is very suitable for being appliedto non-professional audio experience occasions such as vehicle-mounted handsets and handheld interphones.

Description

technical field [0001] This description relates to the technical field of audio signal processing, and in particular to a device and equipment for amplifying audio signals. Background technique [0002] The amplitude of the audio signal cannot be determined due to the inconsistent distance, volume, and timbre of the speaker when speaking to the microphone. When the power amplifier amplifies the audio signal, when the gain of the power amplifier is large, the short-term large-amplitude signal may burn out the speaker, and the small gain of the power amplifier will cause the average volume to be small, and the driver cannot hear clearly. Therefore, it is necessary to stabilize the output audio signal within a certain amplitude range. In the prior art, automatic gain control in TV sets or FM radios is often used. In this control method, the output signal of the amplifier is sequentially processed through an intermediate frequency filter, a mixer, and a tuner of the intermediat...

Claims

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Application Information

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IPC IPC(8): H03G3/30
CPCH03G3/3005
Inventor 李雅贤
Owner HANGZHOU HIKVISION DIGITAL TECH
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