Logic Gates
ICSE · Class 12 · Physics
Summary of Logic Gates for ICSE Class 12 Physics. Key concepts, important points, and chapter overview.
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Overview
Logic gates are digital circuits that work according to a logical relationship between input and output signals. They are the building blocks of digital circuits and are used to process binary values 0 and 1. The chapter also connects logic gates with analogue and digital signals, discrete circuits,
Key Concepts
Discrete circuits are made of separately
Discrete circuits are made of separately manufactured active and passive components connected externally by wires. They are bulky, less shock proof, a
An integrated circuit is a circuit
An integrated circuit is a circuit fabricated on a single semiconductor chip. A monolithic IC has all active and passive components and interconnectio
An analogue signal has voltage
An analogue signal has voltage or current that varies continuously with time. A sinusoidal signal between 0 V and 5 V is a typical example.
A digital signal has only two
A digital signal has only two levels of voltage or current, either 0 or a constant value such as 5 V. Digital signals use the binary digits 0 and 1.
George Boole invented an algebra based
George Boole invented an algebra based on logical statements having only two values: true and false. In binary form, these are represented by 1 and 0.
Learning Objectives
- Understand the difference between analogue and digital signals
- Identify the three basic logic gates: OR, AND and NOT
- Learn the Boolean expressions and truth tables of basic gates
- Understand the working of OR, AND and NOT gates using simple circuits
- Study NAND and NOR as combination gates
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