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Audio signal amplification circuit

A technology for amplifying circuits and audio signals, applied in the direction of improving amplifiers to reduce the influence of noise, etc., can solve problems such as self-excited oscillation of audio amplifier devices, and achieve the effects of preventing self-excited oscillation, improving stability, and true and accurate input signals

Inactive Publication Date: 2017-03-22
成都小晓学教育咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem that audio amplifiers in the prior art are prone to self-excited oscillations, and the purpose is to provide an audio signal amplifier circuit, which can greatly improve Improve the stability of the circuit, which can effectively prevent the self-excitation phenomenon of the amplifying circuit

Method used

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  • Audio signal amplification circuit

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Embodiment

[0022] Such as figure 1 As shown, this embodiment provides an audio signal amplification circuit, including an amplifier A, a speaker ZL, an input signal source U1, an external power supply U2, a first resistor R1, a first capacitor C1, a second capacitor C2, and a third capacitor C3 , the fifth capacitor C5, the first anti-self-oscillation device, the second anti-self-oscillation device and the third anti-self-oscillation device, the first resistor R1 and the third resistor R3 are sliding resistors, and the speaker ZL is provided with an input terminal .

[0023] The first anti-self-oscillation device includes a third resistor R3 and a sixth capacitor C6, the sixth capacitor C6 is connected in parallel with the third resistor R3, and the two ends of the third resistor R3 are respectively used as the input and output of the first anti-self-oscillation device terminal, the sliding tap of the third resistor R3 is connected to the input terminal of the first anti-self-oscillatio...

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Abstract

The invention discloses an audio signal amplification circuit which comprises an amplifier, an input signal source, an external power supply, a first resistor, a second capacitor, a first self-excited oscillation prevention device, a second self-excited oscillation prevention device, a third self-excited oscillation prevention device and a speaker, wherein the first self-excited oscillation prevention device is connected between a sixth pin and an eighth pin of the amplifier; the eighth pin of the amplifier is also connected with the input end of the second self-excited oscillation prevention device; the output end of the second self-excited oscillation prevention device is grounded; the eighth pin of the amplifier is also connected with the input end of the third self-excited oscillation prevention device; the output end of the third self-excited oscillation prevention device is connected with one end of the input end of the speaker; and the other end of the input end of the speaker is grounded. The audio signal amplification circuit disclosed by the invention is used for improving stability of the circuit, filtering out part of high frequencies and preventing a case that the circuit generates high-frequency self-excited oscillation.

Description

technical field [0001] The invention relates to an amplifying device, in particular to an audio signal amplifying circuit. Background technique [0002] As we all know, the communication symbol of radio is sound, and the sound that can best express emotions and exaggerate the atmosphere is sound. Appropriate background sound is used in broadcast news to convey the news content that cannot be expressed by voice alone, and then play a role in exaggerating the atmosphere, explaining the environment in which news facts occur and strengthening the appeal of broadcast news. The application of audio is not only in news broadcasting, but also widely exists in people's life and study, such as stage audio, music playback audio, etc. [0003] Audio engineering is a multidisciplinary comprehensive technology. With the continuous improvement of the performance and grade of lighting and audio equipment, the same cost, different design, construction, and project quality vary greatly. Gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26
CPCH03F1/26
Inventor 李川江
Owner 成都小晓学教育咨询有限公司
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