Question

Which integrated circuits are broadly used in the radio frequency and audio frequency amplifiers?
1. Only digital
2. Only linear
3. Both linear and digital
4. Non – linear

Answer 1

Correct Answer - Option 2 : Only linear

Integrated circuits (IC) are generally divided into two categories.

Analog IC:

• Also called Linear ICs
• It always shows a linear relationship between input and output.
• Broadly used in radio frequency and audio frequency amplifiers because the amplifier shows a linear relationship in input and output.
• A linear relationship is an important criterion for RF amplifiers as it prevents harmonic distortions from taking place.
• Op-amp IC 741 is a linear IC.

Digital IC:

• It operates in ON or OFF level because it is made by logic gates.
• Used in computers and logic circuit design.
• It is a non-linear IC.
• It operates at the microwave frequency range.
• IC 555 is an example of a digital IC