Terms like diode detector, synchronous detector and product detector are widely used. This may be broadcast entertainment for broadcast reception, and for two way radio communications, it is often used for land communications for aeronautical associated applications - often within walkie talkies.ĪM amplitude modulation demodulation principle In the demodulation process the audio or other signal carried by amplitude variations on the carrier is extracted from the overall signal to appear at the output.Īs the most common use for amplitude modulation is for audio applications, the most common output is the audio.
Essentially the terms describe the same process, and the same circuits.Īs the name indicates the demodulation process is the opposite of modulation, where a signal such as an audio signal is applied to a carrier.
The terms detection and demodulation are often used when referring to the overall demodulation process. The demodulator is the circuit, or for a software defined radio, the software that is used to recover the information content from the overall incoming modulated signal.ĪM demodulators are found in many items of radio equipment: broadcast receivers, professional radio communication equipment, walkie talkies - AM is still used for air-band radio communications. The process of demodulation for signals using amplitude modulation can be achieved in a number of different techniques, each of which has its own advantage. the modulation is extracted from the incoming overall received signal. Modulation formats: Modulation types & techniques Frequency modulation Phase modulation Quadrature amplitude modulationĭemodulation is a key process in the reception of any amplitude modulated signals whether used for broadcast or two way radio communication systems.ĭemodulation is the process by which the original information bearing signal, i.e. AM Demodulation: Amplitude Modulation Detection One essential element of using amplitude modulated signals is the process of demodulation or detection.Īmplitude Modulation, AM Tutorial Includes:Īmplitude modulation, AM AM basic theory & formulas AM bandwidth & sidebands Modulation index & depth AM efficiency AM demodulation / detection Diode detector Synchronous detector AM modulators Single sideband, SSB SSB demodulation
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