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Audio power amplifier shutdown puff suppressing device

A suppression device and audio technology, applied in the direction of transducer acoustic response prevention, etc., can solve the problem of shutting down pop sound, etc., to achieve the effect of optimizing the shutting down process, improving the output pulse, and improving performance

Active Publication Date: 2015-04-22
WUXI YOUDA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention provides a device for suppressing the popping sound when shutting down, which solves the problem of the popping sound when shutting down from the inside of the power amplifier circuit

Method used

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  • Audio power amplifier shutdown puff suppressing device
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Examples

Experimental program
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Embodiment Construction

[0012] figure 1 As shown, it is an audio power amplifier power-off pop suppression device, which includes audio power amplifier power supply pin and filter pin, and also includes a first PNP transistor Q1 for detecting the relationship between the audio power amplifier power supply pin potential and the filter pin potential, and a latch Lock loop and filter pin discharge loop; the output terminal of the first PNP transistor Q1 is connected to the input end of the latch loop, and the output end of the latch loop is connected to the filter pin through the filter pin discharge loop. The emitter of the first PNP transistor Q1 is connected to the filter pin through the resistor R11, its pole is connected to the power supply pin of the audio power amplifier through the first resistor R1, and its collector is connected to the input end of the latch structure through the second resistor R2. The filter pin discharge circuit includes a tenth NPN transistor Q10, the base of which is conn...

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PUM

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Abstract

The invention discloses an audio power amplifier shutdown puff suppressing device which comprises an audio power amplifier power supply foot and a filtering foot, and further comprises a first plug-and-play (PNP) pipe (Q1) used for detecting the relationship between the electric potential of the audio power amplifier power supply foot and the electric potential of the filtering foot, a latching loop and a filtering foot discharge loop, wherein an output end of the first PNP pipe (Q1) is connected with an input end of the latching loop, and an output end of the latching loop is connected to the filtering foot through the filtering foot discharge loop. The audio power amplifier shutdown puff suppressing device effectively improves output impulses when an audio power amplifier is shut down, improves performance of the audio power amplifier, simultaneously optimizes the shutdown process of an audio system, improves performance of relative audio systems, and brings certain economic benefits to enterprises.

Description

technical field [0001] The invention relates to a device for suppressing popping sound when an audio power amplifier is shut down. Background technique [0002] Audio power amplifiers are widely used in electronic systems such as home theaters, audio systems, stereo players, and servo amplifiers. While people are pursuing high output power and high-fidelity sound quality, they also have higher and higher requirements for other performance parameters of the audio system. In the current audio system, the power amplifier circuit plays an indispensable role. In order to achieve greater output power, more and more people use BTL output to improve output capability. However, due to the characteristics of the BTL circuit, this kind of circuit will inevitably have a loud "pop" sound on the horn wound during power-on and power-off of the power amplifier. In order to avoid the impact of such phenomena on the overall performance of the audio system, the measures taken at present are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/02
Inventor 聂卫东滕龙
Owner WUXI YOUDA ELECTRONICS