What Is Multiplexer? 

What is multiplexer: A multiplexer allows one of several analogs or digital input signals to be selected and transmits that signal into a single medium. It multiplexes data from multiple sources onto a shared transmission medium.

Multiplexers can be implemented in software on general-purpose computers as well as on special-purpose hardware. 

The more common multiplexing hardware devices support multiple connections using an address/data bus of some type, with each connection having additional signaling if needed (control lines). 220+ Technical Seminar Topics For ECE

Depending on the communications scheme employed, multiple multiplexers may serve as demultiplexers too.

Multiplexer diagram

How its Works? 

Multiplexers are used in communications circuits where multiple transmitters are sending information simultaneously over a common transmission medium.  Also Check: What is Hadoop?

The multiplexer acts as an intermediary, accepting data from each of the multiple sources, multiplexing it into one signal for transmission on each separate wire or channel of the interconnection media, and outputting it at the other end. 

At its destination, another multiplexer or demultiplexer unit regenerates them back into their original form.

This allows all receivers to share common multiple feedlines within certain frequency limitations. Similarly, multiple stations can share a broadcast channel by dividing up

What exactly is Multiplexer?

A Multiplexer is a switch with multiple inputs and a single output. One transmission conductor, such as a copper wire or fiber optic cable, can carry multiple signals. Also Check: What is Oscillator: Definition, Classification

An analog or digital signal is sent through multiple channels by a multiplex method in telecommunications.

These signals are single-output, high-speed signals. A 4-to-1 multiplexer contains four input signals, while a 2-to-1 multiplexer contains two input signals and one output signal.