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:
May. 16, 2006
Filed:
Nov. 08, 2001
Hideyo Shibata, Hirakata, JP;
Hideyo Shibata, Hirakata, JP;
Abstract
Track thinning at an IN point of consecutive recording is prevented by doing a head-track one-edge coincidence tracking by using a head of a larger width than the track width. ATF control unit () makes a control during reproduction of pre-roll of consecutive recording according to a pilot signal out of the reproduction output from heads () so that centers of the heads () may scan the center line of the track. A positioning signal () during the control and a phase of HSW are detected by a detecting circuit (), and a desired phase having a predetermined advanced amount is set by a desired phase setting unit () and stored in a storage unit (). After this, a tracking method switching control unit () switches the tracking method into another by which a control unit () controls the difference in phase between the positioning signal () and the HSW to a desired value stored in the storage unit ().