AGC circuit for operating in accordance with the nature of the i

Details AGC circuit for operating in accordance with the nature of the i AGC circuit for operating in accordance with the nature of the i

1993-05-26

1995-11-07

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4552451, 4552461, 455254, H04B 110

Patent

active

054654084

ABSTRACT:
A controller for AGC recognizes a signal level broader than an AGC control output from an AGC circuit and also recognizes a signal level (a desired station signal level) in a narrow-band by an output from an S-meter. No interference, or the occurrence of 2-signal interference or inter modulation interference can be detected from a change ratio of the desired station signal at the time of the alteration of attenuation values of these two signal levels and an RF signal. In consequence, a proper regulation of the RF signal attenuation value can be carried out in accordance with the presence or absence of the interference and the kind of interference, whereby the suitable receive of the signal can always be achieved.

REFERENCES:
patent: 4455681 (1984-06-01), Wile
patent: 4955073 (1990-09-01), Sugayama
patent: 4955077 (1990-09-01), Sugayama

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