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1. 发明申请

WO2003032483A1 CLASS D SWITCHING AUDIO AMPLIFIER 审中-公开
标题翻译： D类开关音频放大器
公开(公告)号：WO2003032483A1
公开(公告)日：2003-04-17
申请号：PCT/US2002/031344
申请日：2002-10-01
申请人： BUTLER, Joel
发明人： BUTLER, Joel
IPC分类号： H03F3/38
CPC分类号： H03F3/38 , H03F3/085 , H03F3/217 , H03F3/2171 , H03F3/2173
摘要： A Class D switching audio amplifier (20) incorporating four state modulation, input-to-output drive and feedback signal isolation, dual topology output filtration, and a low inductance board layout. The four state modulation results in a common mode voltage in the absence of audio. The input-to-output isolation of drive and feedback signals allows for elimination of large power transformers in applications without user-accessible outputs. Such isolation may make use of optical isolators (84, 86). The output filter (30) includes common mode and differential topology filter stages. The low inductance board layout treats the amplifier and power supply boards as modules, and utilizes both sides of the amplifier board in the order to minimize trace length.
摘要翻译： D类开关音频放大器（20）结合四种状态调制，输入到输出驱动和反馈信号隔离，双拓扑输出滤波和低电感板布局。四状态调制在没有音频的情况下产生共模电压。驱动和反馈信号的输入到输出隔离允许在没有用户可访问输出的应用中消除大功率变压器。这种隔离可以利用光隔离器（84,86）。输出滤波器（30）包括共模和差分拓扑滤波级。低电感板布局将放大器和电源板视为模块，并利用放大器板的两侧，以尽量缩短走线长度。

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