Head-gap calculating device, storage device, head-gap...

Details Head-gap calculating device, storage device, head-gap... Head-gap calculating device, storage device, head-gap...

2007-12-04

2009-10-20

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07605997

ABSTRACT:
A harmonic wave obtaining unit performs a fast Fourier transform (FFT) operation on repeatable run out (RRO) correction data in the time domain and transforms the RRO correction data into a higher harmonic signal data in the frequency domain. A selective-output unit outputs wavelength and amplitude of a first-order harmonic wave and of a third-order harmonic wave of the higher harmonic signal data to a hard disk controller via a formatting unit. A hard disk controller calculates a head-gap between a magnetic head and a magnetic disk in a storage device at the time of reading user data as well as servo data.

REFERENCES:
patent: 3831010 (1974-08-01), Games et al.
patent: 4122502 (1978-10-01), Kobayashi
patent: 6249393 (2001-06-01), Billings et al.
patent: 6671110 (2003-12-01), Baba et al.
patent: 7369341 (2008-05-01), Yokohata et al.
patent: 7440224 (2008-10-01), Ehrlich et al.
patent: 2005/0046985 (2005-03-01), Morinaga et al.
patent: 2005/0213250 (2005-09-01), Kurita et al.
patent: 2006/0139789 (2006-06-01), Yang
patent: 2007/0127147 (2007-06-01), Yokohata et al.
patent: 2007/0127148 (2007-06-01), Yokohata et al.
patent: 2007/0211361 (2007-09-01), Imamura et al.
patent: 2007/0230015 (2007-10-01), Yamashita et al.
patent: 0 605 343 (1994-07-01), None
patent: 2004-014092 (2004-01-01), None
patent: 2005-071546 (2005-03-01), None
patent: 2005-276284 (2005-10-01), None
patent: 2006-190454 (2006-07-01), None
patent: 0130739 (1998-04-01), None
patent: 2001-0022948 (2001-03-01), None
patent: 2001-0078765 (2001-08-01), None
patent: WO 99/09546 (1999-02-01), None

Affiliated with

Also associated with

Rating

Head-gap calculating device, storage device, head-gap... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Head-gap calculating device, storage device, head-gap..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head-gap calculating device, storage device, head-gap... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4069532