combinational and sequential circuits

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Topic : Combinational and sequential circuits GROUP MEMBERS : SOHAIL KHAN JADOON(14CS62) SHAKEEL AHMED(1CS60) MUHAMMAD JAWWAD(14CS42) Course Supervisor : Sir. Haque Nawaz Lashari

Transcript of combinational and sequential circuits

Page 1: combinational and sequential circuits

Topic : Combinational and sequential circuits

GROUP MEMBERS :SOHAIL KHAN JADOON(14CS62)SHAKEEL AHMED(1CS60)MUHAMMAD JAWWAD(14CS42)

Course Supervisor : Sir. Haque Nawaz Lashari

Page 2: combinational and sequential circuits

CONTENT :1. Basics

2. Gates

3. Equation

4. DIFFERENCES.

5. EXAMPLES.

Page 3: combinational and sequential circuits

GATES1. AND.

2. OR.

3. NOT.

4. NAND.

5. NOR.

6. XOR.

7. XNOR

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COMBINATIONAL AND SEQUENTIONAL CIRCUITS

Combinational logic refers to circuits whose output is a function of the present value of the inputs only.

No memory element

Only one input.

Sequential logic circuits are those whose outputs are also dependent upon past inputs, and hence outputs

Depending upon previous input.

Memory element also present which stores output.

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General Example of Combinational Logic:

Last night before exams.

General Example of Sequential Logic: Regular teaching.

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COMBINATIONAL CIRCUITS :1. HALF ADDER.

2. FULL ADDER.

• To add 2 binary digits.• It has two inputs.• Combinational Logic Circuits are made up from basic logic NAND, NOR or NOT gates

S sumC carryX input no.1Y input no.1

http://www.electronics-tutorials.ws/logic/logic_5.html
http://www.electronics-tutorials.ws/logic/logic_6.html
http://www.electronics-tutorials.ws/logic/logic_4.html
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NAND

NOR

+ OR gate.. AND gate.

AND

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SEQUENTIONAL CIRCUITS :

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Thank you……


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