The decoder determines the optimum conversion ratio to improve the efficiency of system from the relation between the input and output voltage.

首先采用译码器对输入和输出电压进行判比，确定最优的转换系数，提高了系统的效率。

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Because you need both a voltage source and a ground in order to create a complete circuit, you need to have a sourcing input or output connected to a sinking output or input.

因为在一个完整的电路中必须有一对电源和地。

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The EL5221 is a dual, low power, high voltage rail-to-rail input-output buffer.

该EL5221是一个双通道，低功耗，高电压，轨对轨输入输出缓冲器。

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In order to fully exploit the sound potential of the HDVD 800 with any audio source, a rotary gain switch at the rear of the unit provides simple adaptation of the amplifier output to the audio input voltage.

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