AMmodulatsioon

AMmodulatsioon, or Amplitude Modulation, is a modulation technique used in electronic communication, most notably in the broadcasting of analog radio signals. It involves varying the amplitude of a carrier wave in proportion to the information signal. The carrier wave is a high-frequency electromagnetic wave that is used to transmit the information. The information signal, which can be audio, video, or other data, is superimposed onto this carrier wave.

In AMmodulatsioon, the amplitude of the carrier wave is modified according to the instantaneous amplitude of the message signal. When the message signal's amplitude increases, the carrier wave's amplitude also increases, and when the message signal's amplitude decreases, the carrier wave's amplitude decreases. This variation in amplitude carries the information. The frequency and phase of the carrier wave remain constant during this process.

The process of AMmodulatsioon typically involves a modulator circuit. The output of the modulator is an AM signal, which can then be amplified and transmitted. At the receiver end, a demodulator circuit is used to extract the original information signal from the modulated carrier wave. This is usually achieved by detecting the variations in amplitude.

AMmodulatsioon is relatively simple to implement and requires less complex circuitry compared to other modulation techniques like Frequency Modulation (FM). However, it is more susceptible to noise and interference, which can also affect the amplitude of the signal and be misinterpreted as information. This characteristic makes AM transmissions generally less clear and more prone to static than FM transmissions, especially in environments with electrical disturbances. Despite its limitations, AMmodulatsioon played a crucial role in the early development of radio broadcasting and continues to be used in some applications, such as shortwave radio and certain aviation communications.