logic gates AND gate NOT gate OR gate NAND gate NOR gate

1. PHYSICS
04/10/2016
LOGIC GATES
GRADE XI

2. OBJECTIVES
During this lesson, students are expected
to:
1.Understand what Logic Gates are
2.Be able to differentiate between
symbols of Logic Gates
3.Know how Logic Gates work.

3.  A logic gate is an elementary building
block of a digital circuit.
 Most logic gates have two inputs and one
output.
 At any given moment, every terminal is in one
of the two binary conditions low (0) or high
(1), represented by different voltage levels.
WHAT IS A LOGIC GATE

4. Happy viewing.
VIDEO ON LOGIC GATES

5. TYPES OF LOGIC GATE WITH
SYMBOLS
AND Gate:
 The AND gate is an electronic circuit that gives
a high output (1) only if all its inputs are high

6. OR Gate:
The OR gate is an electronic circuit that gives a high
output (1) if one or more of its inputs are high.
A plus (+) is used to show the OR operation.

7. NOT Gate:
The NOT gate is an electronic circuit that
produces an inverted version of the input at its
output. It is also known as an inverter. If the
input variable is A, the inverted output is
known as NOT A

8. NAND Gate:
This is a NOT-AND gate which is equal to an AND
gate followed by a NOT gate. The outputs of all
NAND gates are high if any of the inputs are low.
The symbol is an AND gate with a small circle on
the output. The small circle represents inversion.

9. NOR Gate:
This is a NOT-OR gate which is equal to an OR gate
followed by a NOT gate. The outputs of all NOR gates
are low if any of the inputs are high.
The symbol is an OR gate with a small circle on the
output. The small circle represents inversion.

10. SUMMARY TABLE

11. WATCH VIDEO
Happy viewing
HOW LOGIC GATES WORK

12. APPLICATION OF LOGIC GATES IN
DAILY LIFE.AND Gate

13. OR Gate:

14. Not Gate