Signal reproducing method and storage apparatus

Details Signal reproducing method and storage apparatus Signal reproducing method and storage apparatus

Filed on

2007-11-06

Date issued

2007-11-06

Examiner

Sniezek, Andrew L. (Department: 2627)

Patent Class

Dynamic magnetic information storage or retrieval

SubClass

Automatic control of a recorder mechanism

SubSubClass

Controlling the head

Other Related Categories

C360S077020, C360S078040

Type

Reexamination Certificate

Status

active

Patent number

10870667

Description

ABSTRACT:
A signal reproducing method reproduces servo information recorded on a recording medium by use of a head. A current calculation related to a current and an observer calculation related to a position and a velocity of the head are made based on reproduced servo information, and a current value for driving the head is calculated based on the above calculation result. Only computations which require a demodulation result of a present sample are made during a first time after demodulation of the position of the head to a time when the current value is output, and computations which require a demodulation result of a past sample are made during a second time other than the first time.

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