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An infinite impedance detector circuit attached to the final intermediate frequency transformer (IFT) in a radio receiver for Hi-Fi quality AM reception.
An FET infinite impedance AM detector circuit boasts several virtues, making it a popular choice for Hi-Fi AM applications:
Superior Audio Quality:
Low distortion: Unlike diode detectors, which can introduce significant distortion, FET infinite impedance detectors exhibit minimal distortion, offering cleaner, crisper audio.
Excellent selectivity: The high input impedance preserves the tuned circuit's Q factor, leading to sharper selectivity and minimized interference from adjacent radio stations.
Low noise: The relatively low operating currents contribute to a quiet output with minimal background noise.
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