In electronics, a multiplexer or mux is a device that selects one of several analog or digital input signals and forwards the selected input into a single line.[1] A multiplexer of 2n inputs has n select lines, which are used to select which input line to send to the output.[2] Multiplexers are mainly used to increase the amount of data that can be sent over the network within a certain amount of time and bandwidth.(帶寬) In [Digital Logic], a "Multiplexer" converts multiple input to a single output. An electronic multiplexer makes it possible for several signals to share one device or resource, for example oneA/D converter or one communication line, instead of having one device per input signal. In telecommunications, a multiplexer is a device that combines several input information signals into one output signal, which carries several communication channels, by means of some multiplex technique. A demultiplexer is in this context a device taking a single input signal that carries many channels and separates those over multiple output signals. 復用器是將來(lái)自若干單獨分信道的獨立信號復合起來(lái)，在一公共信道的同一方向上進(jìn)行傳輸的設備， 是一種綜合系統。通常包含一定數目的數據輸入，n個(gè)地址輸入（以二進(jìn)制形式選擇一種數據輸入）。復用器有一個(gè)單獨的輸出，與選擇的數據輸入值相同。復用技術(shù)可能遵循以下原則之一，如：TDM、FDM、CDM 或 WDM。復用技術(shù)也應用于軟件操作上，如：同時(shí)將多線(xiàn)程信息流傳送到設備或程序中。 參考：Wikipedia:Multiplexer 互動(dòng)百科：復用器
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