# Logic gates eng

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WELCOME To

DIGITAL CLASS ROOM

A. R. M. Delowar Hossain Lecturer Dept. of ICTCambrian College, DhakaClass-Eleven(xi)Date:10-08-2014

Input

CKT.(Processing)

SOUND(O/P) ?

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Logic GateApplication of Logic Gate: In light of logical operation of logic gates those are used in every digital electronic product, like computer, mobile ,calculator, even digital watches contain logic gate.

AFTER LEARNING THIS LESSIONStudents will be able to To know the mechanism of fundamental logic gates.To Implement basic logic gates by universal gate. To know equivalent circuit of every logic gate.

To understand classification of logic gate

Logic Gate

Primary Gate

Secondary Gate

AND Gate

OR GateNOT Gate/InverterUniversal Gate

Combinational Gate

Defn. of logic gate:Classification of logic gate

O/P, Z=XYFig: AND GATEDefinition :Fig: Truth TableI/P

Equ. Ckt of AND Gate

XYI/PO/PXY00011011

0Z001

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I/PO/PXY00011011

XYI/PO/P, Z=XYZ1101Fig: Operation Table Fig: NAND GATEDefinition :

Z=A+BFig: T. T.Fig: OR GATE

Fig:Equ.ckt of OR GateDefinition :

Fig: T. T.

Definition:

Fig: X-OR GATE

Fig: T. T.

Fig:Equ.ckt of OR Gate INPUT OUT PUTDefinition:

=

Compare Various Types of Gate

Implementation basic Gate by Universal Gate

GROUP LESSIONG-A:Design the fundamental logic gate by NAND Gate and draw the equ. ckt. of OR Gate.

G-B: Design the fundamental logic gate by NOR Gate and draw the equ. ckt. of AND Gate

Evaluation1. What do you mean by logic gate ?2. Explain the universal logic gate.3. Draw the principle gates by NOR Gate.

Q-1: Write down the Defn , Symbol, Equn and Truth Table of every logic gate.

Q-2: Draw the Eqvn. Ckt. of Primary logic gate

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QuotationPeople who are really serious about software (S/W ) should make their own hardware(H/W) -------- Alan KayTechnology is just a tool, in terms of getting thekids working together and motivating them, the teacher is the most important --------- Bill Gates

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