'AM Demodulator: The alignment-free AM demodulator is realized by a synchronous detector." was announced.
************************************************************************************************************************************************* We know this as 1948.
This circuit may also be used as an AM detector byintroducing carrier signal at the carrier input and an AM signal at the SSB input. The carrier signal may be derived from the intermediate frequency signal or generated locally. The carrier signal maybe introduced with or without modulation, provided its levelis sufficiently high to saturate the upper quad differential amplifier. If the carrier signal is modulated, a 300 mVrms input level is recommended.
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