Amplitude modulation (AM) is a technique used in electronic communication that involves varying the amplitude of a carrier wave based on the modulating signal containing information to be transmitted. In AM, a high-frequency carrier wave is modulated by embedding an audio or data signal that varies the carrier's amplitude. This modulated carrier wave can then be transmitted over long distances via radio frequencies or other media to be demodulated and extract the original information signal at the receiver. AM is commonly used in radio broadcasting of audio signals.

1. Amplitude Modulation

2. INTRODUCTION
• Modulation is the process of modifying a carrier signal, typically a high-
frequency wave, by embedding information in it to facilitate transmission
over a communication channel. The carrier signal serves as a "vehicle" for
the information to be transported from the sender to the receiver.

3. Understanding Amplitude Modulation
• Definition: Amplitude Modulation (AM) is a modulation technique used in
electronic communication, transmitting information via variations in the
amplitude of a carrier wave.
• Purpose: AM is widely used in broadcasting audio signals and is a
fundamental building block in communication systems.

4. Basics of Amplitude Modulation
• AM, or Amplitude Modulation, is a modulation technique used in electronic
communication, most commonly for transmitting information via a radio
carrier wave. In AM, the amplitude of the carrier wave is varied in
proportion to the waveform being sent (the modulating signal), which
typically contains the desired audio or data signal.

5. • Frequency Modulation (FM):
• In FM, the frequency of the carrier wave is varied in proportion to the
modulating signal.
• FM is less susceptible to noise and interference compared to AM, making it
more resilient in delivering high-quality audio.
• Phase Modulation (PM):
• In PM, the phase of the carrier wave is varied based on the modulating
signal.
• PM is also less susceptible to noise and interference compared to AM and is
commonly used in some digital communication systems.

6. • AM, or Amplitude Modulation, is a technique used in electronic
communication, particularly in radio broadcasting. It involves the modulation
of a carrier signal by varying its amplitude based on the modulating signal.
Let's break down the main components of AM:

7. • Carrier Signal:
• The carrier signal is a high-frequency continuous waveform, usually a
sinusoidal signal, that serves as the carrier for the information being
transmitted. It is typically a high-frequency signal, such as a radio frequency,
that can easily propagate through the transmission medium (like air for radio
broadcasts).

8. • Modulating Signal:
• The modulating signal is the information signal that carries the actual data to
be transmitted. This can be an audio signal in the case of broadcasting music,
speech, or any other sound. The modulating signal is usually a low-frequency
signal compared to the carrier frequency.

9. • Modulated Signal:
• The modulated signal, also known as the modulated carrier, is the result of
combining the carrier signal with the modulating signal using amplitude
modulation. This combination is achieved by varying the amplitude of the
carrier signal in proportion to the instantaneous amplitude of the modulating
signal.