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The square law detector, also known as an envelope detector, is a circuit used in radio systems to demodulate amplitude-modulated (AM) signals. It works by squaring the incoming signal, which enhances the envelope of the modulation, and then filtering out the high-frequency components to retrieve the original message signal. This simple method allows for effective extraction of the audio or data signal carried by the AM wave. The envelope detector is particularly valued for its ease of implementation and effectiveness in various communication applications.

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4w ago

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