Lecture no 14
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Lecture No. 14. Combinational Functional Devices. Digital Logic &Design Vishal Jethva Lecture 14 svbitec.wordpress.com. Recap. Odd-Prime Number Detector Circuit Using Quine-McCluskey Method Combinational Logic Implemented in SOP and POS form Design and Implementation Steps

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Lecture No. 14

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Lecture No. 14

Combinational Functional Devices

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Digital Logic &Design

Vishal Jethva

Lecture 14

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Recap

  • Odd-Prime Number Detector Circuit

    • Using Quine-McCluskey Method

  • Combinational Logic

  • Implemented in SOP and POS form

  • Design and Implementation Steps

  • Timing Diagram

  • Active High/Low inputs/outputs

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Odd-Parity Function

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SOP Expression SImplification

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Simplifying Expression

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Odd-Parity Generator Circuit

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Operation of Odd-Parity circuit

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XOR & XNOR Gates

  • XOR function

  • XNOR function

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XOR Gate

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XNOR Gate

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Combinational Functional Devices

  • Comparators

  • BCD to 7-Segment

  • Parity Generator Circuit

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Half & Full Adders

  • Half Adder

  • Full Adder

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Half & Full Adders

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Half-Adder

  • Function Table

  • Expression

  • Logic Circuit

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Half-Adder Function Table

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Half-Adder Circuit

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Full-Adder

  • Function Table

  • Expression

  • Logic Circuit

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Full-Adder Function Table

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Sum Expression

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Carry Out Expression

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Full-Adder Circuit

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Full-Adder

  • Full-Adder = Half-Adder + Half-Adder

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Full-Adder based on Two Half-Adders

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Parallel Binary Adder

  • Multiple Single bit Full-Adder connected in Parallel

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4-bit Parallel Adder

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Carry Propagation

  • Carry Ripple

  • Look-Ahead Carry Circuits

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Look-Ahead Carry Circuit

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Sum & Carry Expressions

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Carry Expressions

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Look-Ahead Carry Generator

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MSI-Adders

  • 74LS83A

  • 74LS283

  • 16-pin ICs

  • 4-bit A input

  • 4-bit B input

  • 4-bit Sum output

  • 1-bit Carry in

  • 1-bit Carry Out

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12-bit Parallel Adder

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