What is amplitude modulation explain production of amplitude modulation?

Amplitude modulation is a process by which the wave signal is transmitted by modulating the amplitude of the signal. It is often called AM and is commonly used in transmitting a piece of information through a radio carrier wave. Amplitude modulation is mostly used in the form of electronic communication.

How PAM signal is generated?

A PAM is generated from a pure sine wave modulating signal and a square wave generator which produces the carrier pulse and a PAM modulator circuit. A sine wave generator is used which is based on the Wien Bridge Oscillator circuit. This can produce distortion less sine wave at the output.

How many generation methods are there to generate an AM wave?

In this chapter, let us discuss about the modulators, which generate amplitude modulated wave. The following two modulators generate AM wave.

What is the need for amplitude modulation?

Amplitude modulation provides an efficient way to shift an acoustic or speech signal to a desirable frequency.

What is the purpose of amplitude modulation?

What is amplitude modulation and frequency modulation?

Frequency modulation (FM) and amplitude modulation (AM) are used to transmit data in the form of electromagnetic waves. While AM follows the process of modulating the amplitude of the carrier wave where frequency remains constant, in case of FM, the wave frequency varies, and amplitude remains constant.

What is amplitude modulation equation?

Am and Ac are the amplitude of the modulating signal and the carrier signal respectively. fm and fc are the frequency of the modulating signal and the carrier signal respectively. Then, the equation of Amplitude Modulated wave will be. s(t)=[Ac+Amcos(2πfmt)]cos(2πfct) (Equation 1)

What do you need to know about amplitude modulation?

Amplitude modulation is just the beat phenomenon of 2 signals with close frequencies beating. To produce AM, add the outputs of 2 generators that have almost equal frequencies and equal amplitudes. Voltages from generators can be added just as voltages from batteries – connect them in series.

How is sum modulation used in a function generator?

Sum modulation adds a modulating signal to any carrier waveform; it is typically used to add Gaussian noise to a carrier. The modulating signal is added to the carrier as a percentage of carrier waveform amplitude. Figure 7. Sum modulation function generator setup – adding noise into a sine wave carrier signal.

How are the waves of a function generator modulated?

Modern function generators nowadays have a very important feature called modulation. With the advent of radio wave telegraphy in the 19 th century by Guglielmo Marconi and later the wideband FM radio in the 20 th century by Edwin Howard Armstrong, radio waves are modulated by its carrier waves for efficient long-range transmissions.

How does am generation use low level modulation?

AM generation involves mixing of a carrier and an information signal. In low level modulation, the message signal and carrier signal are modulated at low power levels and then amplified. The advantage of this technique is that a small audio amplifier is sufficient to amplify the message signal.