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:
Jan. 22, 1985
Filed:
Sep. 29, 1982
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A phase locked loop control circuit for a digital audio disk system is disclosed which has a voltage-controlled oscillator (VCO), a reference signal generator for generating a reference signal corresponding to the phase state of a digital audio signal when the digital audio signal is reproduced or read out and which is recorded on a digital audio disk (DAD) to have a maximum or minimum inverting period value predetermined by the eight to fourteen modulation method, a phase comparator connected to the output terminal of the reference signal generator and the VCO, a detector for detecting the maximum inverting period value included in the digital audio signal; and an adder for adding outputs from the phase comparator and the detector and for supplying a sum result as an oscillation control signal to the VCO.