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2024年3月12日发(作者：instr是什么函数)

专利内容由知识产权出版社提供

专利名称：Head position recognition method, head

moving speed control device and head

speed calculation method

发明人：SHIMIZU RYOSUKE,清水 亮輔,TAKAOKA

TETSURO,高岡 哲朗

申请号：JP特願平3-107799

申请日：19910514

公开号：JP第2765266号B2

公开日：19980611

摘要：PURPOSE:To enlarge the range of speed detection and the dynamic range of

moving speed and to improve the performance of track seeking by providing four kinds

of a servo pattern with the period of 24 tracks on servo sectors provided discretely in the

direction of circumference on a recording medium. CONSTITUTION:To the sub-track

code part of the servo sectors 2, four kinds of the servo pattern with the period 24 tracks

are buried. This is read out by a head 5, the servo sectors existing discretely are detected

by a servo information demodulator 8, by data found with an in-track position decoder 9,

a positional information recognizing device 10, etc., head speed is found through a speed

commander 11 and simultaneously, error between the output of a speed operation

means 12 is calculated by an error amplifier to compensate by a compensator 14. Thus,

the relative positional relation of the tracks where a data head passes through is

detected, is corrected by one track or below, the range of the speed detection is

enlarged, and also the dynamic range is enlarged and the track seeking is performed with

higher speed and in shorter time.

申请人：MATSUSHITA DENKI SANGYO KK,松下電器産業株式会社

地址：大阪府門真市大字門真1006番地

国籍：JP

代理人：滝本 智之 (外1名)

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