Hint: Demodulation is a critical step in receiving any amplitude modulated signal, whether for broadcast or two-way radio communication systems. Demodulation is the process of extracting the original information-carrying signal, i.e., the modulation, from the received overall signal. Demodulation of amplitude-modulated signals can be accomplished using a variety of techniques, each with its own set of advantages.
Complete answer:
A demodulator is a device that performs demodulation, which is the opposite process of modulation. The most basic equipment used for AM demodulation is a diode detector. A diode detector is made up of a diode and a few other parts. Modulators and demodulators are both utilized in modems.
Additional information:
AM demodulators are found in any piece of radio equipment that receives AM broadcasts or uses amplitude modulation in radio communications systems. Although amplitude modulation is no longer as popular as it once was, it is still utilized for broadcasting on the Long, Medium, and Short-Wave bands.
Aeronautical radio communications may be its most important use for professional radio communications. It is frequently used for ground communications in this area, and walkie-talkies are widely used. Each of these different types of radio communication will necessitate the use of an AM demodulator.
Note:
Demodulation always necessitates a nonlinear operation on a signal to estimate a baseband signal proportional to the carrier modulation. Based on this nonlinearity, demodulation approaches can be generally characterized as rectification (non-synchronous detection) and mixing with a reference oscillator signal (synchronous detection).
