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:
Apr. 27, 1976
Filed:
Apr. 22, 1974
Kohei Sasamura, Sagamihara, JA;
Yukinobu Ishigaki, Yamato, JA;
Victor Company of Japan, Ltd., Yokohama, JA;
Abstract
A multichannel record disc recording system comprises automatic gain control circuits for each of the multichannels a control voltage, representing the phases and levels of the multichannel signals, control the gain of the automatic gain control circuits. An operational circuit at the output of the automatic gain control circuits produces an output sum signal and a difference signal. The difference signal, is angle modulated and multiplexed with the sum signal. The resulting multiplexed signal is recorded on a record disc. Each of the automatic gain control circuits carries out a gain control operation so that the maximum level of the output sum signal does not exceed a predetermined level, and the maximum level of the output signal of the automatic gain control circuit exceeds one half of the predetermined level.