What is a Demultiplexer?

A demultiplexer (Demux) is a device that splits a single input signal into multiple output signals. In contrast to a multiplexer (Mux), which combines multiple input signals into a single output, a demultiplexer performs the reverse function. It is commonly used in digital circuits and plays a critical role in data communication and signal processing.

The demultiplexer distributes a single input signal to a specified number of output signals based on control signals. For example, a 2-to-4 demultiplexer uses control signals to decide which of the four outputs the input signal will be sent to. This feature allows for efficient processing of multiple signals while using the same physical connections.

Demultiplexers are used in communication systems to efficiently transmit and receive multiple data streams or to divide different signals in digital signal processing.

Application of Demultiplexer

１．Communication Systems: Demultiplexers are used in communication systems to efficiently distribute multiple signals. For example, in fiber-optic communications, demultiplexers enable multiple data streams to be transmitted and received over a single fiber-optic cable.
２．Television Broadcasting: In broadcasting, demultiplexers are used to combine multiple channels into one signal, which is then distributed as individual channels to viewers. This allows multiple channels to be transmitted over a single cable.
３．Computer Networks: In computer network data transfer, demultiplexers are used to send multiple data streams to different devices. This helps to make efficient use of network bandwidth by separating the data streams.

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