Gain control for a dual burst, dual frequency PES servo pattern

Details Gain control for a dual burst, dual frequency PES servo pattern Gain control for a dual burst, dual frequency PES servo pattern

1997-08-07

2000-06-20

Faber, Alan T.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 67, 360 7708, G11B 509

Patent

active

060784458

ABSTRACT:
Real-time gain control calibration is provided for each frequency of a disk drive storage system using dual-frequency, dual-burst position error sensing (PES) signals. Automatic and independent gain control for each PES servo burst frequency component is achieved with an automatic gain control (AGC) mapping that determines the approximate head position and performs an appropriate gain calibration for each servo burst frequency or with sector by sector normalization performed for each PES signal sample. For the AGC mapping, calibration is performed either with calibration tracks or with an in situ method. Both mapping and normalization methods provide accurate automatic gain calibration during signal readback.

REFERENCES:
patent: 4048660 (1977-09-01), Dennison et al.
patent: 4551776 (1985-11-01), Roalson
patent: 4890172 (1989-12-01), Watt et al.
patent: 5121260 (1992-06-01), Asakawa et al.
patent: 5408373 (1995-04-01), Bajorek et al.
patent: 5453887 (1995-09-01), Negishi et al.
C.H. Bajorek, E. Harden and N.J. Mazzeo, "Large Surface Air Bearing for a Flexible Disc File", IBM TDB, vol. 18, No. 11, Apr. 1976, 3859-60.
M. Barlow, M.A. Church, R.E. Jones, Jr. and T.H. Yeh, "Thin Film Magnetic Head Assembly", IBM TDB, vol. 24, No. 4, Sep. 1981, 1912-13.
D.M. Jones, "Parallel Servo-Track Write and Read Verification with Side-By-Side Inductive Head Elements", IBM TDB, vol. 26, No. 8, Jan. 1984, 4243-44.

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