Automatic gain control circuit

Details Automatic gain control circuit Automatic gain control circuit

H - Electricity

03

G

330/39

H03G 3/30 (2006.01) H03G 3/20 (2006.01)

Patent

CA 1179407

C-3374 D-5,631 AUTOMATIC GAIN CONTROL CIRCUIT Abstract of the Disclosure: An automatic gain control circuit is disclosed which is direct coupled to phase opposed outputs of an IF amplifier and provides a DC control voltage for controlling the gain of the amplifier. The AGC circuit includes a peak-to- peak threshold detector and an integrating capacitor. The quiescent voltage across the capacitor is accurately established by a voltage divider network and a feedback network. Separate current sources are provided to establish dual time constants in the circuit so that distortion is minimized while accommodating a stop on station feature.

408684

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