Amplitude demodulator
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United States of America Patent
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Jun 22, 1999
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N/A
app pub date -
May 13, 1997
filing date -
Sep 27, 1994
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Abstract
An amplitude demodulator for demodulating a quadrature-amplitude modulated stereo signal for radio receivers, where a digital intermediate-frequency signal is constructed from a received signal, the intermediate-frequency signal is converted into a baseband, creating two orthogonal components thereby, a magnitude signal and a phase signal are derived from the orthogonal components, a tangent is constructed from the phase signal, and the tangent is multiplied by the magnitude signal to create a stereo difference signal.
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