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D类音频放大器的输出滤波器优化

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摘要:本应用笔记探讨输出滤波器的D类音频放大器的性能的影响。如MAX4295和MAX4297对他们更传统的AB类同行提供提高效率开关模式放大器。通过了解这些设备,调制噪声频谱和他们需要推动扬声器负载的运作,这是可以完全消除输出过滤器,同时保留了D类放大器的效率方面的好处。
Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS AUDIO CIRCUITS

Keywords: Class D, audio amplifiers, switching amplifer, output filter, modulation noise, PWM, filterless, Apr 01, 2002
amplifers

APPLICATION NOTE 624
Class D Audio Amplifier Output Filter Optimization

Abstract: This application note examines the effect of the output filter on audio Class D amplifier performance.
Switch-mode amplifiers such as the MAX4295 and MAX4297 offer improved efficiency over their more
traditional Class AB counterparts. By understanding the operation of these devices, the modulation noise
spectrum and the loudspeaker loads they are required to drive, it is possible to completely eliminate the output
filter while retaining the efficiency benefits of Class D amplifiers.


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标签:MaximClassDaudioamplifiersswitchingamplifieroutputfiltermodulationnoisePWMfilterlessamplifiersamplifer
D类音频放大器的输出滤波器优化
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