Multiplexers and Decoders

Jul 30, 2014

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Multiplexers and Decoders. ELEC 311 Digital Logic and Circuits Dr. Ron Hayne Images Courtesy of Cengage Learning. Multiplexers. Larger Multiplexers. Tri-State Buffers. Decoders. Read-Only Memory.

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Multiplexers and Decoders

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Multiplexers and Decoders ELEC 311 Digital Logic and Circuits Dr. Ron Hayne Images Courtesy of Cengage Learning
Multiplexers 311_09
Larger Multiplexers 311_09
Tri-State Buffers 311_09
Decoders 311_09
Read-Only Memory 311_09

Decoders

Decoders. Now, we’ll look at some commonly used circuits: decoders and multiplexers. These serve as examples of the circuit analysis and design techniques from last lecture. They can be used to implement arbitrary functions.

926 views • 20 slides

Multiplexers

I . S=0. 0 . 2:1 Multiplexor. Z . I . 1 . S=1. S . Z . I . I . S . Z . Z = S' I 0 + S I 1. 1 . 0 . S. 0 . I . 0 . 0 . 0 . 0 . 0 . 1 . I . 0 . 0 . 1 . 0 . 1 . 0 . 1 . 0 . 1 . 0 . 1 . 1 . 0 . 1 . 0 . 0 . 0 . 1 . 0 . 1 . 1 . 1 . 1 . 0 . 1 . 1 .

637 views • 17 slides

Decoders and Multiplexers

Decoders. A combinational circuit that converts binary info from n inputs into a max. of 2n unique objects.N - to - m decoders: given n inputs, it outputs m <= 2n minterms. Note the ``3'' with a slash, which signifies a three bit input. This notation represents three (1-bit) wires. A decoder with n input bits, produces 2^n output bits. .

633 views • 30 slides

Decoders

Decoders. Next, we’ll look at some commonly used circuits: decoders and multiplexers. These serve as examples of the circuit analysis and design techniques from last lecture. They can be used to implement arbitrary functions.

454 views • 20 slides

Decoders

Decoders. Usage of Decoders. Channel Selection: Generates Mutually Exclusive Channel Enabling/Disabling Signals (e.g. Multiplexers) Device Selection: Generates unique 1’s/0’s on output lines to turn on/off devices (e.g. decoder trees) Universal Function Implementation:

838 views • 60 slides

Multiplexers

Multiplexers. Functional Description and Symbols. Where, N = {1, 2, 3, ….. , ∞}. Where, N = {1, 2, 3, ….. , ∞}. Where, N = {1, 2, 3, ….. , ∞}. Where, n = 2 (m+1) – 1 m = {0,1, 2, 3, ….. , ∞}. Operation of a 2-to-1 line Mux. Operation of a 2-to-1 line Mux.

358 views • 26 slides

Decoders and Encoders

Decoders and Encoders. Discussion DS-2.1. Decoders and Encoders. Binary Decoders Binary Encoders Priority Encoders. Decoders. 3-to-8 Decoder. A: in STD_LOGIC_VECTOR(2 downto 0); Y: out STD_LOGIC_VECTOR(0 to 7);. Behavior. for i in 0 to 7 loop

529 views • 25 slides

Multiplexers

Multiplexers. Overview. Discussion of two digital building blocks Magnitude comparators Compare two multi-bit binary numbers Create a single bit comparator Use repetitive pattern Multiplexers Select one out of several bits Some inputs used for selection

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Multiplexers Decoders Encoders Code converters Arithmetic comparison circuits

Multiplexers Decoders Encoders Code converters Arithmetic comparison circuits VHDL for combinational circuits. Multiplexers. s. f. s. w. w. 0. 0. 0. 0. f. w. 1. w. 1. 1. 1. (b) Truth table. (a) Graphical symbol. w. w. 0. 0. s. s. f. w. w. f. 1. 1.

1.3k views • 83 slides

T,JK-flip-flop, Midterm 1 Revision Decoders and Multiplexers

CS147. T,JK-flip-flop, Midterm 1 Revision Decoders and Multiplexers. Lecture 9. Prof. Sin-Min Lee Department of Computer Science San Jose State University. 4 Basic types of Flip-Flops. SR, JK, D, and T JK ff has 2 inputs, J and K need to be asserted at the same time to change the state

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Decoders

Decoders. Decoders. A decoder is multiple-input, multiple-output logic circuit that converts coded inputs into coded outputs . Input code with fewer bits than the output bits. Typically n inputs decoder has 2 n outputs 2-to-4, 3-to-8, 4-to-16, etc. There is a one-to-one mapping.

4.27k views • 24 slides

Decoders

Decoders. Outline. Useful MSI circuits Decoders Implementing Functions with Decoders Decoders with Enable Larger Decoders Standard MSI Decoders Implementing Functions with Decoders. Outline. Useful MSI circuits Decoders Implementing Functions with Decoders Decoders with Enable

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Combinational Circuits: Multiplexers, Decoders, Programmable Logic Devices

Combinational Circuits: Multiplexers, Decoders, Programmable Logic Devices. Lecture 5 Doru Todinca. Textbook. This chapter is based on the book [RothKinney]: Charles H. Roth, Larry L. Kinney, Fundamentals of Logic Design , Sixth Edition, Cengage Learning. 2010

1.54k views • 87 slides

Decoders

Decoders. Decoders. • A decoder is a circuit which takes an n-bitnumber as input and uses it to select (set to1) exactly one of its 2n outputs. 3 input to 8 output decoder. Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7. B0 B1 B2 E. E B2 B1 B0 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7

635 views • 33 slides

Decoders

Decoders. Discussion D9.5 Example 25. Decoders. 3-to-8 Decoder. decoder38.vhd. library IEEE; use IEEE.STD_LOGIC_1164. all ; use IEEE.STD_LOGIC_unsigned. all ; entity decoder38 is port ( a : in STD_LOGIC_VECTOR(2 downto 0); y : out STD_LOGIC_VECTOR(0 to 7) );

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ELEC1700 Computer Engineering 1 Week 7 Monday lecture Decoders, encoders and multiplexers

ELEC1700 Computer Engineering 1 Week 7 Monday lecture Decoders, encoders and multiplexers Semester 1, 2013. Decoders Encoders Multiplexers. Decoders, encoders and multiplexers. A 0. A 0. X. X. A 1. A 1. A 2. A 2. A 3. A 3. active-HIGH decoder for 0011.

1.04k views • 31 slides

Multiplexers Decoders ROMs (LUTs)

Multiplexers Decoders ROMs (LUTs). A Problem Statement. Design a circuit which will select between two inputs (A and B) and pass the selected one to the output (Q). The desired circuit is called a multiplexer or MUX for short. Multiplexer Symbols. Preferred symbol. A. A. 0 1. 0 1. Q.

1.02k views • 82 slides

Multiplexers

Multiplexers. Section 3-7 Mano & Kime. Multiplexers & Demultiplexers. Multiplexers (Selectors) Lab 1 – Behavioral VHDL -- Multiplexers MUX as a Universal Element. 4– to– 1- Line Multiplexer. 4–to–1-Line Multiplexer with Transmission Gates. Quadruple 2–to–1-Line Multiplexer. Typical uses.

807 views • 48 slides

Decoders

Decoders. Lecture L6.9 Section 6.4. Decoders. Decoders TTL Decoders. Y0. 2-to-4. A. Y1. Decoder. B. Y2. Y3. Decoders. B A Y0 Y1 Y2 Y3 !Y0 !Y1 !Y2 !Y3. 0 0 1 0 0 0 0 1 1 1 0 1 0 1 0 0 1 0 1 1 1 0 0 0 1 0 1 1 0 1 1 1 0 0 0 1 1 1 1 0.

232 views • 12 slides

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