What are the characteristics of amplitude modulation?

amplitude modulation (AM), variation of the amplitude of a carrier wave (commonly a radio wave) in accordance with the characteristics of a signal, such as a vocal or musical sound composed of audio-frequency waves.

What are the main requirements of AM broadcast transmitters?

The working of AM transmitter can be explained as follows.

• The audio signal from the output of the microphone is sent to the pre-amplifier, which boosts the level of the modulating signal.
• The RF oscillator generates the carrier signal.
• Both the modulating and the carrier signal is sent to AM modulator.

What are the three important sections of high level AM transmitter?

Figure (a): Block Diagram of High Level AM Transmitter The required transmitting power is obtained from the last stage of the transmitter, the class C power amplifier. The various sections of the figure (a) are: Carrier oscillator. Buffer amplifier.

What is amplitude modulation explain the block diagram of a particle AM transmitter?

Amplitude Modulated (AM) transmitter. Fig gives the block diagram of amplitude modulated radio transmitter. It consists of two sections (i) Audio frequency (AF) section and (ii) Radio frequency (RF) section. AF section. The AF section of the transmitter generates the modulating wave (signal).

What is the need of amplitude modulation?

To make the transmission possible, modulation was introduced, i.e., multiplying the message by a periodic signal such as a cosine ⁡ ( Ω 0 t ) , the carrier, with a frequency much larger than those in the acoustic signal. Amplitude modulation provided the larger frequencies needed to reduce the size of the antenna.

What type of transmitter is AM?

High level transmitters use high level modulation, and low level transmitters use low level modulation. The choice between the two modulation schemes depends on the transmitting power of the AM transmitter.

What is AM transmitter and AM receiver?

The amplitude-modulated (AM) transmitter produces an electromagnetic carrier wave whose amplitude is modulated (varied at an audio rate), and which travels through the other to a radio receiver.

What is the difference between modulation and demodulation?

The key difference between modulation and demodulation is that modulation is done at the transmitter side while demodulation is done at the receiver side of a communication system. Modulation is basically done to transmit data to longer distance whereas demodulation is done to regain the original message signal.

What is the principle of amplitude modulation?

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the carrier wave is varied in proportion to that of the message signal, such as an audio signal.

What is the circuit used for producing AM called?

modulator
The circuit used for producing AM is called a modulator. Its two inputs, the carrier and the modulating signal, and the resulting outputs are shown in Fig. 3-3. Amplitude modulators compute the product of the carrier and modulating signals.