Spensley Horn Jubas & Lubitz
AGC circuit for operating in accordance with the nature of the interference signal and method for controlling this circuit
 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. 
Clarion Co., Ltd. Tottori Sanyo Electric Co., Ltd. Nissan Motor Co., Ltd. Sanyo Electric Co., Ltd.
H H
H04B H03G
inventional inventional
Takao Akira Kenji Sakae
Asami Maeta Kato Sugayama