The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1976
Filed:
Sep. 12, 1975
Applicant:
Inventors:
Assignee:
Victor Company of Japan, Limited, Yokohama, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
1791 / ; 179 / ; 1791 / ;
Abstract
A multichannel record disc reproducing system comprises a circuit for demodulating an angle-modulated wave picked up from a multichannel record disc. A circuit detects abnormal phenomena of the angle-modulated wave, whereupon an expansion circuit accomplishes a variable control operation. A middle frequency band and/or a high frequency band component of the demodulated signal is attenuated in accordance with the level thereof. A circuit is operated in response to the output of the detection circuit to stop a variable expansion control operation of the expansion circuit and imparts a specific attenuation characteristic to a signal passing through the expansion circuit.