Compared with DC coupling signal processing, it need lower requirement of signal processing circuit and have the merit of high signal-to-noise performance although it require the device of modem.

同直流信号直接耦合处理相比，交流信号耦合虽然要增设调制解调装置，但对后级信号处理电路的器件要求更低，信噪比更高。

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Capacitors used in coupling and dc blocking applications serve to couple RF energy with the minimal energy wasting from one part of a circuit to another.

耦合隔直用电容作用是把射频能量从电路的一部分转移到另一部分，能量损失最小。

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The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter.

该电机驱动电路还包括耦合到输入装置、第一能量存储装置、双向DC-DC电压变换器的耦合系统。

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