Lesson Notes By Weeks and Term - Senior Secondary 2

Alternative logic circuits

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Term: 1st Term

Week: 9

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer Studies and ICT

Topic:-       Alternative Logic circuits

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Define alternative logic gates
  2. List and explain the alternative logic gates

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, pictures, Data Processing for senior Secondary Education by Hiit Plc, WAPB Computer Studies for Senior Secondary II by Adekunle et  al, On-line Materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher reviews the previous lesson on the uses and practical application of the logic gates

Students pay attention

STEP 2

EXPLANATION

He defines alternative logic gates

 

Students pay attention and participates

STEP 3

DEMONSTRATION

He further lists and explains the alternative logic gates

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

ALTERNATIVE LOGIC GATES

The alternative. logic are gates that are formed from a combination of two logic gates. Such as AND, NOT, OR, XOR and XOR and XNOR can be created from their simple network they are also called the. universal gates.

 

TYPES OF ALTERNATIVE LOGIC GATES
1) The ‘NAND’ gate: From ‘AND’ and ‘NOT’ gates.

This basic logic gate is the combination of AND and NOT gates.

 

The truth table of a NAND gate is given as

A

B

Y

0

0

1

0

1

1

1

0

1

1

1

0

 

  1. NOR Gate

This gate is the combination of OR and NOT gates.

 

  1. Exclusive-OR gate (XOR Gate)

In an XOR gate, the output of a two-input XOR gate attains state 1 if one adds only input and attains state 1.

  1. Exclusive-NOR Gate (XNOR Gate)

In the XNOR gate, the output is in state 1 when both inputs are the same, that is, both 0 or both 1.

EVALUATION:    1. Define alternative logic gates

  1. List and explains with diagrams, the alternative logic                    gates

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively