Digital electronics multiplexers demultiplexers
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Multiplexers and demultiplexers allow digital information from multiple sources to be routed through a single line. A multiplexer has multiple data inputs, select lines to choose an input, and a single output. A demultiplexer does the reverse, taking a single input and distributing it to multiple outputs based on select lines. Multiplexers and demultiplexers can be combined in trees to increase the number of inputs and outputs. They are used to implement logic functions where a select line acts as the value of a variable in a Boolean expression.
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10 multiplexers-de mux
1. The lecture discusses multiplexers, demultiplexers, and programmable logic devices. Multiplexers route one of several inputs to a single output, while demultiplexers route a single input to one of several outputs.
2. Multiplexers and demultiplexers can implement any Boolean function and be used as general purpose logic blocks. They can be cascaded to form larger multiplexers and demultiplexers.
3. Programmable logic arrays and programmable array logic are arrays of uncommitted AND and OR gates that can implement any two-level logic function by programming the wire connections. Product terms can be shared across multiple outputs.
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Multiplexers and demultiplexers allow digital information from multiple sources to be routed through a single line. A multiplexer has multiple data inputs, select lines to choose an input, and a single output. A demultiplexer has a single input, select lines to choose an output, and multiple outputs. Bigger multiplexers and demultiplexers can be built by cascading smaller ones. Multiplexers can implement logic functions by using the select lines as variables and routing the input lines to the output.
Multiplexers
A multiplexer is a device that selects one of several analog or digital input signals and forwards the selected input into a single line. It has multiple data inputs, a single output, and select lines that determine which input is directed to the output. A demultiplexer performs the opposite function, taking a single input and distributing it to one of multiple outputs based on the select lines. Multiplexers and demultiplexers come in various configurations depending on the number of inputs and outputs, such as 2:1, 4:1, 16:1 or 32:1. They are basic building blocks used in digital systems and communication networks to efficiently route signals.
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This document discusses multiplexers and demultiplexers. It defines them as devices that allow digital information from several sources to be routed onto a single line (multiplexers) or distributed to multiple output lines (demultiplexers). The key properties of multiplexers and demultiplexers are described, including the relationship between the number of inputs, outputs, and selection lines. Examples of implementing multiplexers and demultiplexers using logic gates are provided.
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A multiplexer and demultiplexer allow multiple signals to share a single transmission line. A 2/1 multiplexer is described with a block diagram, truth table, and K-map implementation showing it selects one of two inputs based on a select line. A 4/1 multiplexer circuit is also shown. Multiplexers are used in data communications, radio channels, computer routing, and function generation by selecting an output from multiple inputs. An 8/1 multiplexer generates a function from a truth table. A 1 to 2 demultiplexer circuit separates a single input into two outputs based on a select line.
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1) A multiplexer is a combinational circuit with m inputs, n control inputs, and 1 output that can select one of the m inputs to pass to the output based on the values of the n control inputs.
2) A 4-to-1 multiplexer has 4 inputs, 2 control inputs, and 1 output. The output will be one of the 4 inputs depending on the binary values of the 2 control inputs.
3) A demultiplexer is the opposite of a multiplexer, taking a single input and distributing it to one of multiple outputs based on the control inputs. It can also be used as a decoder to output a binary word based on the control input code.
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A multiplexer is a digital circuit that has multiple inputs and a single output. It selects one of the multiple input lines to pass to its output based on a digital select line. A multiplexer uses select lines to determine which input is passed to the output. Multiplexers come in different sizes depending on the number of inputs and select lines, such as 2-to-1, 4-to-1, and 8-to-1 multiplexers. Multiplexers are used in applications such as data communications, audio/video routing, and implementing digital logic functions.
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Multiplexers and demultiplexers allow digital information from multiple sources to be routed through a single line. A multiplexer has multiple data inputs, select lines to choose an input, and a single output. A demultiplexer has a single input, select lines to choose an output, and multiple outputs. Bigger multiplexers and demultiplexers can be built by cascading smaller ones. Multiplexers can implement logic functions by using the select lines as variables and routing the input lines to the output.
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1) A multiplexer is a combinational circuit with m inputs, n control inputs, and 1 output that can select one of the m inputs to pass to the output based on the values of the n control inputs.
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The truth table is not complete because it is missing the encoding for when no inputs are active. A complete truth table would include a row for all zero inputs to specify the output in that case.
The output equations are:
A0 = D7
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This document discusses various digital logic components including encoders, decoders, multiplexers, and parity generators and checkers. It provides truth tables and logic diagrams for 8-to-3 encoders, 4-to-2 priority encoders, 2-to-4 decoders, 1-to-4 demultiplexers, even and odd parity generators, and even parity checkers. It also discusses implementing logic functions using multiplexers and decoders and gives examples of realizing functions with an 8x1 multiplexer. The document provides information on the basic operations of these components and their use in digital circuits.
Multiplux
This document discusses multiplexers and demultiplexers. It begins by explaining the principles of multiplexing and demultiplexing, which involve routing digital information from multiple inputs to a single output line (multiplexing) and redistributing the information back to multiple outputs (demultiplexing). The document then describes the architecture and operation of multiplexers and demultiplexers, including 2-to-1 and 4-to-1 examples. It also discusses common applications such as data routing and sharing resources.
Combinational circuits
This document discusses combinational logic circuits. It begins with an outline of topics including Boolean algebra, decoders, encoders, and multiplexers. It then provides details on each of these topics. For decoders, it explains their function to decode an input value and provide an output. It provides truth tables for 2-to-4 and 3-to-8 decoders and shows how they can be constructed from logic gates. For encoders, it describes their inverse function of encoding inputs. Priority encoders and their truth tables are also covered. Finally, multiplexers are defined as using address bits to select a single input data line to output. Methods for constructing larger multiplexers from smaller ones are presented.
microprocessors
The document provides an overview of microprocessors and microcontrollers. It discusses the history and evolution of microprocessors from early minicomputers in the 1960s to modern microcontrollers that integrate CPU, memory and I/O onto a single chip. The document outlines common microprocessor components like registers, ALU, buses and control units. It also covers digital logic gates, memory systems, number representations and instruction sets.
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This document discusses combinational circuit design and provides examples of various combinational logic circuits. It begins with an introduction that defines combinational and sequential circuits. The remainder of the document provides details on specific combinational logic circuits including half adders, full adders, subtractors, encoders, decoders, multiplexers, comparators, and code converters. Worked examples are provided for each circuit type using truth tables, Karnaugh maps, and logic diagrams. Applications of decoders for implementing functions like a full adder are also described.
Decodder presentation by ibrar
1) A decoder is a circuit that converts binary input into octal or decimal output by activating one of its output lines. It has fewer output lines than input lines.
2) An encoder performs the reverse operation of a decoder - it converts octal or decimal input into binary output. It has fewer input lines than output lines.
3) A multiplexer is a circuit that selects one of several input lines and directs it to a single output line based on the value of a selection input. It allows transmission of multiple information over fewer channels.
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This document summarizes a lecture on standard combinational modules, including multiplexers, demultiplexers, and shifters. It provides examples and logic diagrams of multiplexers, which select one of several data inputs to output based on a control input. Demultiplexers function opposite of multiplexers to select one of several outputs. Shifters can be implemented using multiplexers to shift data left or right by one position based on shift control inputs. A barrel shifter allows shifting data left or right by varying amounts using multiple stages of multiplexers.
Lecture 1
This document provides an introduction to medium scale integrated (MSI) circuits. It defines MSI circuits as containing between 12-99 logic gates. Examples of MSI circuits discussed include multiplexers, demultiplexers, decoders, encoders, and adders. Common integrated circuit chip families for implementing MSI circuits are presented, such as the 74x151 for multiplexers. The document also discusses implementing various logic functions using MSI building blocks like multiplexers, decoders, and priority encoders.
digital electronics..
This presentation introduces digital logic circuits such as encoders, decoders, multiplexers, demultiplexers and logic gates. It is presented by a group consisting of 5 members whose names and student IDs are listed. The topics covered include the definitions of complements, combinational logic circuits, encoder and decoder functions, how multiplexers and demultiplexers work, and the truth tables of common logic gates.
4,encoder & decoder MUX and DEMUX EEng - Copy.pdf
This document discusses various combinational logic functions including decoding, encoding, multiplexing, and decoding. It provides details on decoder and encoder circuits. Decoders accept a binary input and activate only one output corresponding to that input. Encoders have multiple inputs but activate only one at a time, producing a binary output code. Examples of 3-line to 8-line decoders and 8-line to 3-line encoders are shown with their truth tables.
Chapter10.ppt
This document discusses computer design basics including computer specification, simple computer architecture, datapaths, arithmetic logic units (ALUs), shifters, and control words. It describes how a computer's lowest level appearance to a programmer is defined by its instruction set architecture, and how its hardware implementation is described by its computer architecture. A simple computer architecture is decomposed into a datapath for performing operations and a control unit for controlling the datapath.
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This document discusses computer design basics including instruction set architecture, computer architecture, datapaths, and control units. It describes the components of a basic datapath including registers, arithmetic logic units, shifters, and multiplexers. Control signals are organized into a control word to direct datapath operations for executing microinstructions.
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This document discusses computer design basics including instruction set architecture, computer architecture, datapaths, and control units. It describes the components of a basic datapath including registers, arithmetic logic units, shifters, and multiplexers. Control signals are organized into a control word to direct datapath operations for executing microinstructions.
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Digital electronics multiplexers demultiplexers
- 1. Multiplexer (data Selectors) • Definition : A multiplexers (MUX) is a device that allows digital information from several sources to be routed onto a single line for transmission over that line to a common destination. • Several data input lines • Some select line (less than the no. of input lines) • Single output line • If there are n data input lines and m select lines, then 2m = n
- 2. Functional Diagram Of a Multiplexer
- 3. 2 : 1 Multiplexer S Z 0 I0 1 I1
- 4. 4 : 1 Multiplexer S0 S1 Z 0 0 I0 0 1 I1 1 0 I2 1 1 I3
- 5. 8 : 1 Multiplexer S0 S1 S3 Z 0 0 0 I0 0 0 1 I1 0 1 0 I2 0 1 1 I3 1 0 0 I4 1 0 1 I5 1 1 0 I6 1 1 1 I7
- 6. Multiplexer Tree • The Multiplexers with more number of inputs can be obtained by cascading two or more multiplexers with less number of inputs. • Below is a design of 16:1 MUX using 4 4:1 MUXs :-
- 7. Demultiplexer (Data Distributor) • Definition : A DEMULTIPLEXER (DEMUX) basically reverses the multiplexing function. It takes data from one line and distributes them to a given number of output lines. For this reason, the demultiplexers is also known as a data distributor. • Single data input lines • Some select line (less than the no. of output lines) • Several output line • If there are n data output lines and m select lines, then 2m = n
- 8. Functional Diagram Of a Demultiplexer
- 9. 1 : 2 Demultiplexer S0 Y0 Y1 0 D 0 1 0 D
- 10. 1 : 4 Demultiplexer S0 S1 D0 D1 D2 D3 0 0 D 0 0 0 0 1 0 D 0 0 1 0 0 0 D 0 1 1 0 0 0 D
- 11. 1 : 8 Demultiplexer
- 12. 1 : 8 Demultiplexer (Truth Table) S0 S1 S3 D0 D1 D2 D3 D4 D5 D6 D7 0 0 0 D 0 0 0 0 0 0 0 0 0 1 0 D 0 0 0 0 0 0 0 1 0 0 0 D 0 0 0 0 0 0 1 1 0 0 0 D 0 0 0 0 1 0 0 0 0 0 0 D 0 0 0 1 0 1 0 0 0 0 0 D 0 0 1 1 0 0 0 0 0 0 0 D 0 1 1 1 0 0 0 0 0 0 0 D
- 13. Demultiplexer Tree F0 F1 F3F2 F4 F5 F6 F7 S0 S1 S2 1:2 Demux 1:2 Demux 1:2 Demux 1:2 Demux 1:2 Demux 1:2 Demux 1:2 Demux INPUT 0 1 0 0 0 0 0 0 1 1 1 1 1 1 S S S S S S S Below is a design of 1:8 MUX using 7 1: MUXs :-
- 14. Implementation Of Logic Functions using Multiplexer A B C F 0 0 0 0 0 0 1 1 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 1 1 1 1 1 f(a, b, c) = a’b’c + ab 0 0 0 1 0 0 1 1 A B C S2 S0S1 F 8:1 MUX 0 4 3 1 2 5 6 7
- 15. A B C O F 0 0 0 0 C 0 0 1 1 0 1 0 0 0 0 1 1 0 1 0 0 0 0 1 0 1 0 1 1 0 1 1 1 1 1 1 C 0 0 1 B C S0S1 F 4:1 MUX 0 1 2 3 f(a, b, c) = a’b’c + ab
- 16. A B C D O F 0 0 0 0 0 D 0 0 0 1 1 0 0 1 0 0 D 0 0 1 1 1 0 1 0 0 1 D’ 0 1 0 1 0 0 1 1 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 0 0 1 0 1 0 1 0 0 D’ 1 0 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1 f(a, b, c) = F=A’B’C’D + A’B’CD + A’BC’D’ + AB’CD + ABC’D’ + ABC’D + ABCD’ +ABCD D 0 1 A B C S2 S0S1 F 8:1 MUX 0 4 3 1 2 5 6 7 D’
- 17. THANK YOU