Logic gates eng

1. WELCOME
To
DIGITAL CLASS ROOM

2. A. R. M. Delowar Hossain
Lecturer
Dept. of ICT
Cambrian College, Dhaka
Class-Eleven(xi)
Date:10-08-2014

3. Input
CKT.(Processing)
SOUND(O/P)
?

4. Logic Gate
Application 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.

5. AFTER LEARNING THIS LESSION
Students 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

6. Logic
Gate
Primary Gate
Secondary Gate
AND Gate
OR Gate
NOT Gate/Inverter
Universal Gate Combinational Gate
Defn. of logic gate:
Classification of logic gate

7. O/P, Z=XY
Fig: AND GATE
Definition :
Fig: Truth Table
I/P
Equ. Ckt of AND Gate
X
Y
I/P O/P
X Y
0 0
0 1
1 0
1 1
0
Z
0
0
1

8. I/P O/P
X Y
0 0
0 1
1 0
1 1
X
Y
I/P O/P, Z=XY
Z
1
1
0
1
Fig: Operation TableFig: NAND GATE
Definition :

9. Z=A+B
Fig: T. T.Fig: OR GATE
Fig:Equ.ckt of OR Gate
Definition :

10. Fig: T. T.
Definition:

11. Fig: X-OR GATE Fig: T. T.
Fig:Equ.ckt of OR Gate
INPUT OUT PUT
Definition:
=

12. Compare Various Types of Gate

13. Implementation basic Gate by Universal Gate

14. GROUP
LESSION
G-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

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

16. 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

17. Quotation
People who are really serious about software
(S/W ) should make their own hardware(H/W)
-------- Alan Kay
Technology is just a tool, in terms of getting the
kids working together and motivating them, the
teacher is the most important
--------- Bill Gates