Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1980-09-17
1982-10-19
Safourek, Benedict V.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455177, 455194, 455249, 455250, 455295, 455296, 455183, H04B 110
Patent
active
043554148
ABSTRACT:
An automatic gain control for a receiver includes a gain controller for controlling the gain of the receiver, a control device connected to the tuning device of the receiver for varying and controlling the tuning frequency of the tuning device, and a level detector connected to the control device and the receiving signal system of the receiver for detecting the receiving level. The control device includes a calculation processor connected to the tuning device, the level detector and the gain controller, and the calculation processor includes a detector for detecting the absence or presence of other broadcasting waves (interference waves) in a predetermined relation with the receiving frequency of the receiver and for controlling the gain controller in such a manner as to reduce the gain thereof when the signal intensity of the interference broadcasting waves exceeds a predetermined level predetermined by the level detector.
REFERENCES:
patent: 3886457 (1975-05-01), Petaja
patent: 4126828 (1978-11-01), Kumagai
patent: 4254506 (1981-03-01), Henderson et al.
Hitachi , Ltd.
Safourek Benedict V.
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