Uses of multiplexer in digital electronics book pdf

A multiplexer of 2n inputs has n select lines, which. So what exactly are digital circuits and why should we care about them. The book digital electronics contains twelve chapters with comprehensive. This training board gives a better this training board gives a better understanding. One of these data inputs will be connected to the output based on the values of selection lines. Multiplexer mux and multiplexing tutorial electronicstutorials. Multiplexers can select data input lines as per our requirement. Spring 2011 ece 331 digital system design 30 using a 2ninput multiplexer use a 2ninput multiplexer to realize a logic circuit for a function with 2n minterms. Based on your tags, im guessing youre talking about audiovideo files. In most cases a digital multiplexer is a digital selector.

For n input lines, log n base2 selection lines, or we can say that for 2 n input lines, n selection lines are required. Different types of encoder and decoder and its uses. In the following article we will discuss the construction and operataion of multiplexer and demultiplexer in detail. They forward the data input to one of the outputs depending on the values of the. So, each combination will select only one data input. A multiplexer is a device that brings the concept of a rotary switch in analog electronics to the digital side. Laboratory manual digital systems and logic design. Combinational logic has many uses in electronic systems. Multiplexer is a crucial combinational circuit which is used in various significant application. The multiplexer is used to perform highspeed switching and is constructed by electronic components multiplexers are capable of handling both analog and digital applications. Multiposition switches are widely used in many electronics circuits.

In the digital electronics, the binary decoder is a combinational logic circuit that converts the binary integer to the associated pattern of output bits. The single pole multiposition switch is a simple example of non electronic circuit of multiplexer, and it is widely used in many electronic circuits. Digital logic is the basis of electronic systems, such as computers and cell phones. Multiplexing and demultiplexing logic functions for computing. It is a device which, based on some input, will change the connection of its other inputs to its. Electronics tutorial about the multiplexer mux and digital multiplexers used in. In electronics, a multiplexer also known as a data selector, is a device that selects between several analog or digital input signals and forwards it to a single output line. The single pole multiposition switch is a simple example of nonelectronic circuit of multiplexer, and it is widely used in many electronic circuits. The multiplexer is a very useful electronic circuit that has uses in many different. Electronicsmultiplexers wikibooks, open books for an. Use the multiplexer to implement complex logical functions. Since digital logic uses binary values, powers of 2 are used 4, 8, 16 to.

This book is licensed under a creative commons attribution 3. In analog applications, multiplexers are made up of of. 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. Spring 2011 ece 301 digital electronics 21 using a 2ninput multiplexer use a 2ninput multiplexer to realize a logic circuit for a function with 2n minterms. A digital device capable of selecting one input out of its multiple input lines and forwarding it on a common output line is called a multiplexer. We can refer to a multiplexer with the terms mux and mpx too. Digital circuits contain a set of logic gates and these can be operated with binary values, 0 and 1.

Flipflops and latches are fundamental building blocks. It also consists of data selector switch w hich is used to. Since there are n selection lines, there will be 2 n possible combinations of zeros and ones. For analog application, multiplexer are built of relays and transistor switches.

Here the basic concept of mux is explained with truth table and circuit is also designed. They can be used to keep a record or what value of variable input, output or intermediate. A multiplexers mux is a device that allows digital information from several sources to be routed onto a single line. We can have n control bits to select from 2n input bits. Digital logic is rooted in binary code, a series of zeroes and ones each having an opposite value. Multiplexer is a combinational circuit that has maximum of 2 n data inputs, n selection lines and single output line. Gates are used as the building blocks in the design of more complex digital logic circuits. For digital application, they are built from standard logic gates. Multiplexers and demultiplexers are often confused with one another by students. Multiplexing circuits are called multiplexer or mux. The selected line decides which ip is connected to the op, and also increases the. A multiplexer is a circuit used to select and route any one of the several input signals to a signal output.

Multiplexer data selectordigital electronicsenglish. Demultiplexers take one data input and a number of selection inputs, and they have several outputs. This is the reason multiplexers are often termed as. Ee4512 analog and digital communications chapter 7 if the data sources have different rates a multiplexer scheme must reconcile the disparate rates. Digital multiplexer 8bitcomputer logic training board has been designed specifically for the study of digital multiplexer. Examples of solved problems for chapter3,5,6,7,and8. Digital electronics is a field of electronics involving the study of digital signals and the engineering of devices that use or produce them. A flip flop is an electronic circuit with two stable states that can be used to store binary data. Sdram receives its address command in two address words. The term multiplexing can have multiple interpretations. The world of electronics was initially dominated by analogue signalsthat is, signals representing a continuous range of values.

There are three main ways of constructing a multiplexer. This is in contrast to analog electronics and analog signals digital. In this lesson we will study digital multiplexing in. An important class of electronic circuits is made of digital ones. Pdf handwritten digital electronics made easy study. One of these data inputs will be connected to the output based on the values of selection. A multiplexer or mux is a device that has many inputs and a single output. The reverse of the digital multiplexer is the digital demultiplexer. Aims to familiarise students with combinational logic circuits sequential logic circuits how digital logic. Pdf this book consists of four chapters and is intended as the.

In simple words, it is the reverse of demultiplexer demux. It is a combinational circuit which have many data inputs and single output depending on control or select inputs. Digital electronics part i combinational and sequential logic dr. An electronic multiplexer can be considered as a multipleinput, singleoutput. In other words, the rotary switch is a manual switch that you can use to select. This lab manual provides an introduction to digital logic, starting with simple gates and building up to. Since all input variables are complemented in this expression, we can directly derive the pullup network as having parallelconnected pmos transistors controlled by x1 and x2, in series with parallel. An simple example of an non electronic circuit of a multiplexer is a single pole multiposition switch. What are the uses of multiplexer, demultiplexer, encoder. It is a combinational digital circuit and generally called a data selector as well. J hoolan, in telecommunications engineers reference book, 1993. A 4 to 1 multiplexer uses 2 select lines s0, s1 to determine which.

Pdf digital electronics basic principles and design. Multiplexers and demultiplexers digital electronics wiley online. Flip flop are also used to exercise control over the functionality. Multiplexers are also known as data n selector, parallel to serial convertor, many to one circuit, universal logic circuit. In this lesson we will study digital multiplexing in which the number of inputs is a power of two 2, 4, 8, 16, and there is one output. Digital electronicsasychronous devicedigital multiplexer. Digital electronics part i combinational and sequential. Chapter 3 explains about the concept of data processing circuits like encoder, decoder, multiplexer. Although they appear similar, they certainly perform di.

Since a multiplexer s job is to select one of the data input lines and send it to the output, it is also known as data selector. Digital multiplexer or data selector is a logic circuit that has several input lines and a single output line. Multiplexer encoders demultiplexers and decoders application. Kaushik and others published digital electronics find, read. The stored data can be changed by applying varying inputs. The multiplexer mux the operation of sending one or more analog or digital. In digital circuitry, however, there are only two states.