# What is multiplexor and demultiplexor?

## What is multiplexor and demultiplexor?

Definition. Multiplexer refers to a type of combinational circuit that accepts multiple inputs of data but provides only a single output. The demultiplexer refers to the type of combinational circuit that accepts just a single input but directs it through multiple outputs. Technique of Conversion.

Why do we need demultiplexers?

Demultiplexer is used to connect a single source to multiple destinations. The main application area of demultiplexer is communication system, where multiplexers are used. Most of the communication system are bidirectional i.e., they function in both ways (transmitting and receiving signals).

What is 4×1 mux?

4×1 Multiplexer has four data inputs I3, I2, I1 & I0, two selection lines s1 & s0 and one output Y. The block diagram of 4×1 Multiplexer is shown in the following figure. One of these 4 inputs will be connected to the output based on the combination of inputs present at these two selection lines.

### What is a demux circuit?

De-Multiplexer is a combinational circuit that performs the reverse operation of Multiplexer. It has single input, ‘n’ selection lines and maximum of 2n outputs. The input will be connected to one of these outputs based on the values of selection lines.

Where is MUX and demux used?

Communication System

Mux and demux both are used in communication systems to carry out the process of data transmission. A De-multiplexer receives the output signals from the multiplexer and at the receiver end, it converts them back to the original form.

What are the types of demultiplexer?

Types of Demultiplexers

• 1 to 4 Demultiplexer. The 1 to 4 demultiplexer consists of one input, four outputs, and two control lines to make selections The below diagram shows the circuit of 1 to 4 demultiplexer.
• 1 to 8 Demultiplexer.
• 1 to 16 Demultiplexer.

#### Where are demultiplexers used?

By using Demultiplexer, the transmission of data can be done through one single input to a number of output data lines. Generally, Demultiplexers are used in decoder circuits and Boolean function generators.

How do demultiplexers work?

The demultiplexer takes one single input data line and then switches it to any one of a number of individual output lines one at a time. The demultiplexer converts a serial data signal at the input to a parallel data at its output lines as shown below.

Is a 4 1 multiplexer a combinational circuit?

It is a Combinational Logic Circuit with more than one input line, one output line and more than one select line. It accepts the binary information from several input lines or sources and depending on the set of select lines, a particular input line is routed onto a single output line.

## Where are multiplexers used?

Multiplexers are used in various applications wherein multiple-data need to be transmitted by using a single line.

• Communication System.
• Computer Memory.
• Telephone Network.
• Transmission from the Computer System of a Satellite.
• Communication System.
• Arithmetic Logic Unit.
• Serial to Parallel Converter.
• Photo Credits.

How does a 1 to 4 demultiplexer work?

A 1-to-4 demultiplexer has a single input (D), two selection lines (S1 and S0) and four outputs (Y0 to Y3). The input data goes to any one of the four outputs at a given time for a particular combination of select lines.

How many Demultiplexers are there?

In 1 to 4 De-multiplexer, there are total of four outputs, i.e., Y0, Y1, Y2, and Y3, 2 selection lines, i.e., S0 and S1 and single input, i.e., A. On the basis of the combination of inputs which are present at the selection lines S0 and S1, the input be connected to one of the outputs.

### How do muxes work?

A multiplexer is a system of multiple inputs and just one output to receive signals coming from multiple acquisition networks. The device transfers all input signals to a microprocessor, which receives and processes the data, transmits it to the output devices, and controls the system as a whole.

Where is demultiplexer used?

Demultiplexer (Demux) and Multiplexer (MUX) both are used in communication systems to carry multiple data signals (i.e. audio, video etc) using single line for transmission. In this easier process, Demultiplexer receive the output data of Multiplexer (as a receiver) and covert back them to the original form then.

What type of circuit is a demultiplexer made from?

combinational logic circuit
A Demultiplexer is a combinational logic circuit that receives the information on a single input line and transmits the same information over one of ‘n’ possible output lines.

#### What are the types of demux?

The different types of demultiplexers are 1-8 Demux, 1-16 Demux, 1-32 Demux. In demultiplexer, the selection of output line can be controlled through n-selection lines bit values.

Why MUX is called universal logic circuit?

In most of the application, we experience the use of multiplexers. The multiplexer or MUX is used to implement the Boolean functions or any of the logic gates, and it is called as universal logic. The main application of multiplexer is to select from one of the inputs and hence called as the switch.

Can we design a 4×1 MUX with two 2×1 multiplexers?

Yes, it can, as in post #2. Otherwise one channel on each will always be on. True (without a disable pin), but there is nothing in post #1 about this being a not allowed condition. I am assuming these are analog multiplexers (passing an analog signal) so a digital logic front end cannot be used.

## Is multiplexer a universal gate?

Multiplexer can act as universal combinational circuit. All the standard logic gates can be implemented with multiplexers. It is NOT Gate using 2:1 MUX.

How many types of multiplexers are there?

There are three types of Multiplexing : Frequency Division Multiplexing (FDM) Time-Division Multiplexing (TDM) Wavelength Division Multiplexing (WDM)

How do Demultiplexers work?

A demultiplexer (also known as a demux or data distributor) is defined as a circuit that can distribute or deliver multiple outputs from a single input. A demultiplexer can perform as a single input with many output switches. The demultiplexer’s output lines are ‘n’ in number, the select line number is ‘m’ and n = 2m.

### What is the output of a MUX?

The MUX or multiplexor function outputs the same number as one of its inputs. The input that is chosen is dependent on the value of the K input. The MUX function has a K (integer) input and 2 or more other inputs.

How does a demultiplexer work?

How many types of demultiplexer are there?

#### Why is NAND gate universal?

Thus, the NAND gate is a universal gate since it can implement the AND, OR and NOT functions. NAND Gate is a Universal Gate: To prove that any Boolean function can be implemented using only NOR gates, we will show that the AND, OR, and NOT operations can be performed using only these gates.

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