| 音响保护的创新性设计 |
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| 引用本文： | 魏明. 音响保护的创新性设计[J]. 微型机与应用, 2011, 30(13) |
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| 作者姓名： | 魏明 |
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| 作者单位： | 苏州大学应用技术学院，江苏苏州,215325 |
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| 摘 要： | 介绍了一种低功耗的音响保护系统。通过单片机控制晶闸管的导通角完成功率放大器的软启动。采用三端双向可控硅光耦合器实现对扬声器的短路保护、过载保护、零点漂移保护、过热保护等。检测电路和控制电路光电隔离,避免了控制电路对放大器的干扰,使扬声器可直接与放大器相连,以获得更好的频率响应。
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| 关 键 词： | 软启动 冲击电流 光耦合器 继电器 |
The innovative design of audio protection |
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| Wei Ming. The innovative design of audio protection[J]. Microcomputer & its Applications, 2011, 30(13) |
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| Authors: | Wei Ming |
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| Affiliation: | Wei Ming (Applied Technology College,Soochow University,Suzhou 215325,China) |
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| Abstract: | This paper introduces a circuit protected perfectly the loudspeaker and the audio power amplifier.Using triac-optical coupler achieved short circuit protection,over load protection,DC-offset protection.Detection circuitry insulated control circuit.So the power amplifier could be linked with loudspeaker directly and get better frequency response and low cost. |
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| Keywords: | soft-start dash current optical coupler relay |
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