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:
Oct. 27, 1987
Filed:
Sep. 16, 1985
Minoru Kosaka, Tokorozawa, JP;
Tutomu Banno, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A recording disk data playback apparatus capable of playback of recording disks having a video signal usually with an audio signal recorded thereon by frequency modulation, together with audio data modulated as a pulse train superimposed thereon, includes a phase-lock loop circuit for generating a read-out clock signal to read out from a memory the playback digital audio data, in which that data has been temporarily stored, with the loop circuit including a filter whose cut-off frequency is selected to be lower than the maximum frequency of the bandwidth of a tangential servo system which controls movement of a data sensing light spot tangential to the recording tracks. Jitter which cannot be fully corrected by the tangential servo system is thereby eliminated.