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:
Jun. 15, 1993
Filed:
Jul. 26, 1991
Kiyoshi Tateishi, Tokorozawa, JP;
Tsutomu Takahashi, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A spindle control apparatuses for a disk player allows a quick search of recorded data on a disk carrying a plurality of types of data that should be read out at different reading velocities. A spindle servo loop is rendered open in response to a command and a normal rotational velocity of the disk necessary to read out recorded data at a specific address is computed. Then the disk's rotational velocity is accelerated or decelerated in a single step until it coincides with the designated rotational velocity and the servo loop is closed when these velocities coincide with each other. This allows quick and stable locking of the spindle servo loop during the searching period, so that the searching velocity is raised considerably.