Detection of Amplitude Modulated Wave: Detection of amplitude modulated wave is the process of separating the modulating message signal from the modulated carrier wave. This process involves extracting the original message signal from the modulated signal using various demodulation techniques such as envelope detection, synchronous detection, and superheterodyne detection. The demodulated message signal can then be amplified, filtered, and decoded to reproduce the original information transmitted over the AM wave. Detection of AM waves is important in various applications such as AM radio broadcasting, mobile communication, and radar systems.

Detection of Amplitude Modulated Wave

Detection of amplitude modulated wave involves the process of extracting the original message signal from the modulated carrier wave. There are several methods for detection of amplitude modulated wave, including envelope detection, synchronous detection, and superheterodyne detection.

• Envelope Detection: The envelope detection method involves rectifying the modulated signal to remove the negative half cycles and then passing it through a low-pass filter to obtain the original message signal. This method is simple and inexpensive but suffers from low accuracy and distortion.
• Synchronous Detection: The synchronous detection method involves multiplying the modulated signal with a locally generated carrier signal and then passing it through a low-pass filter to obtain the original message signal. This method is more accurate than envelope detection but requires a precise and stable local oscillator.
• Superheterodyne Detection: The superheterodyne detection method involves mixing the modulated signal with a locally generated carrier signal to produce an intermediate frequency (IF) signal, which is then amplified and demodulated to obtain the original message signal. This method is the most commonly used and provides high accuracy, sensitivity, and selectivity but is more complex and expensive than the other two methods.

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By Team Learning Mantras