轮廓调制结合了一种相位调制信号的波形和放大器的输出阻抗，可在某个较大型输出电源关闭后保持更高的效率。
Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
这和放大器的输出阻抗究竟是多少无关。
在“简洁”条件下，反馈放大器的传递函数和输入、输出阻抗具有简洁和便于应用的形式。
On the "simplifying" conditions, the transfer functions, as well as the input and output impedance expressions of the feedback amplifiers, are succinct; and, can be conveniently used.
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