“Modulation is the process of superimposing a low frequency signal on a high frequency carrier signal.”

OR “The process of modulation can be defined as varying the RF carrier wave in accordance with the intelligence or information in a low frequency signal.”

OR “Modulation is defined as the process by which some characteristics, usually amplitude, frequency or phase, of a carrier is varied in accordance with instantaneous value of some other voltage, called the modulating voltage”.

Lesson 11

Amplitude Modulation – Lesson 11

Lesson 12

Frequency Modulation and Phase Modulation – Lesson 12

Lesson 13

Demodulators (Detectors) – Lesson 13

Lesson 14

Amplitude Modulators – Lesson 14

Lesson 15

Frequency Modulators – Lesson 15
Engineering Institute of Technology