Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Reexamination Certificate
2006-02-01
2008-10-07
Wellington, Andrea (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
C360S051000
Reexamination Certificate
active
07433142
ABSTRACT:
Provided is a read channel, storage drive, and method to process signals read from a storage medium. At least one data channel including an interpolator and equalizer and a servo channel includes an interpolator. A timing recovery function processes a timing error from the interpolator in the servo channel to calculate interpolation timing information used by the interpolator to interpolate a servo channel signal. A path is coupled to the timing recovery function and the interpolator in the at least one data channel to communicate the interpolation timing information to the interpolator in the at least one data channel. The interpolator in the at least one data channel is configured to use the interpolation timing information to interpolate an asynchronous data channel signal.
REFERENCES:
patent: 4353099 (1982-10-01), Shum et al.
patent: 4433424 (1984-02-01), Taber et al.
patent: 5295128 (1994-03-01), Hutchins et al.
patent: 5359631 (1994-10-01), Behrens et al.
patent: 5440532 (1995-08-01), Yokogawa et al.
patent: 5457581 (1995-10-01), Hallamasek
patent: 5481568 (1996-01-01), Yada
patent: 5812336 (1998-09-01), Spurbeck et al.
patent: 6021011 (2000-02-01), Behrens et al.
patent: 6246733 (2001-06-01), Hutchins
patent: 6532128 (2003-03-01), Bui et al.
patent: 6724561 (2004-04-01), Wyman
patent: 6781778 (2004-08-01), Molstad et al.
patent: 6865050 (2005-03-01), Nakao et al.
patent: 6879457 (2005-04-01), Eaton et al.
patent: 2002/0154430 (2002-10-01), Rae et al.
patent: 2003/0043898 (2003-03-01), Huang et al.
patent: 2003/0053245 (2003-03-01), Ozdemir
patent: 2007/0171565 (2007-07-01), Cherubini et al.
patent: 0 901 125 (1999-03-01), None
patent: 1 669 994 (2006-06-01), None
patent: 01/18808 (2001-03-01), None
patent: 01/80238 (2001-10-01), None
patent: 2005/031738 (2005-04-01), None
U.S. Patent Application entitled “Read Channel Apparatus for Asynchronous Sampling and Synchronous Equalization”, U.S. Appl. No. 11/213,127, filed Aug. 26, 2005, by inventors E.S. Eleftheriou, J. Jelitto, S. Oelcer, R. Hutchins and G. Jaquette.
F.M. Gardner, “Interpolation in Digital Modems—Part 1: Fundamentals”, IEEE Transactions on Communications, vol. 41, No. 3, Mar. 1993, pp. 501-507.
R.C. Barrett, et al., “Timing-Based Track-Following Servo for Linear Tape Systems”, IEEE Transactions on Magnetics, vol. 34, No. 4, Jul. 1998, pp. 1872-1877.
D. Berman, et al., “Enhanced Linear Interpolation for Low Sampling Rate Asynchronous Channels”, IEEE 2001, pp. 3025-3028.
PCT International Search Report & Written Opinion dated Jun. 19, 2007 for Serial No. PCT/EP2007/050772 filed Jan. 26, 2007.
Bui Nhan Xuan
Cherubini Giovanni
Eleftheriou Evangelos S.
Hutchins Robert Allen
Jaquette Glen Alan
International Business Machines - Corporation
Kapadia Varsha A
Konrad Raynes & Victor LLP
Victor David W.
Wellington Andrea
LandOfFree
Using at least one servo channel to provide timing recovery... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Using at least one servo channel to provide timing recovery..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Using at least one servo channel to provide timing recovery... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3998675