[BEST] Application and Advantages of Amplitude Modulation

There is a huge application of Amplitude Modulation(AM) in Broadcasting Transmission over a large distance. The great advantages of Amplitude Modulation(AM) are, easy to implement, cheaper. The noticeable disadvantage of Amplitude Modulation(AM) is noise creation. In this article, you will know many important applications, advantages, and disadvantages of Amplitude Modulation(AM).

Applications of Amplitude Modulation(AM)

1. The main application of Amplitude Modulation(AM) is, it is used for transmitting data or information via radio waves.

2. Amplitude Modulation(AM) used in the electronic analog communication system.

3. Amplitude Modulation(AM) is used in earlier days to transmit voice by radio.

4. Amplitude Modulation(AM) is used in old Televisions to control the pixels on the screen.

5. It is used in some devices such as Citizens band radio, two-way radio, and computer modems.

6. It is also used in medium-wave AM radio broadcasting.

7. Amplitude Modulation(AM) process used in the analog mixer for audio control.

8. There is a very important application of Amplitude Modulation(AM) in AM Radio Communication.

9. Amplitude Modulation(AM) used in two-way communication over the radio in Aircraft

10. It is also used in Air Band Radios.

11. It is used in earlier days to transmit Morse Code.

12. It was also used in the telephone system in earlier days.

13. This procedure is used in police and navy dispatch radio systems.

Advantages of Amplitude Modulation(AM)

The main advantages of Amplitude Modulation(AM) are,

1. The components used for the Amplitude Modulation(AM)  are very cheaper so the overall cost of the circuit is low.

2. Modulator circuit is very simple and also simple in operation.

3. This process is suitable for any audio signal. In fact, it is the simplest method for audio signals than others.

4. The Amplitude Modulated signal can be easily demodulated at the receiver side using a very simple circuit with few components.

5. The Amplitude Modulation(AM) process can be used for all short, medium, and large-distance transmission systems.

6. The implementation of this process is also very simple.

Disadvantages of Amplitude Modulation(AM)

1. Noise creation

2. Electromagnetic Interference

3. Low efficiency

4. Inefficient Power Use or power loss

5. Lack of signal security

Why we need Amplitude Modulation?

The moderation of the amplitude of a signal is called Amplitude Modulation or AM. Amplitude Modulation is performed when we transfer data or information via wire or wirelessly. Generally, Amplitude Modulation is done to help the receiver machine to identify the data.

When we transmit any data through a wire or using a wireless connection, it always carries an analog signal even if it is digital communication.

Let's take an example that is a computer modem. We know that our computer works in digital form. So when we send any data from our computer through the Internet, first the digital data is converted into an analog signal by the modem and it sends via the communication system.

In the waveform of the Amplitude modulated signal, you may see the amplitude is not constant, sometimes it is low, and sometimes it is high. So if we transmit a digital signal the high amplitude represents the digital data '1' and the low amplitude represents the digital data '0'.

How Amplitude Modulation is done?

There is a very simple process of Amplitude modulation. here you can see a simple amplitude modulator circuit using a transistor. 

You can see in the above diagram the circuit needs two signals one is a carrier signal and the other is a sinusoidal signal. By comparing two signals the modulator circuit produces the amplitude modulated signal.

Basically, it multiples the audio signal (modulating signal) with a high-frequency carrier wave, resulting in two sidebands around the carrier frequency. The carrier wave's amplitude is changed according to the instantaneous amplitude of the modulating signal. The modulated signal is then transmitted, and at the receiver end, the carrier is extracted and the original modulating signal is recovered by demodulation techniques such as envelope detection or synchronous detection.

Read Also:

• [BEST] Advantages, Applications of FDM or Frequency Division Multiplexing
• [BEST] Applications, Advantages of FM or Frequency Modulation
• [BEST] Advantages, Applications of TDM or Time Division Multiplexing
• [Main] Differences Between AM and FM in Communication
• What is Amplitude of a Wave? Definition, Formula, Example

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