G - Physics – 11 – B
Patent
G - Physics
11
B
341/97, 352/21.3
G11B 21/10 (2006.01) G11B 5/596 (2006.01)
Patent
CA 1133123
SECTORIZED DATA PATH FOLLOWING SERVO SYSTEM Abstract A servo system for accurately positioning a transducer relative to data paths on a recording medium by detecting sync and servo signals from two parallel abutting servo tracks sharing a common longitudinal boundary within circumferentially spaced sectors of the medium. Within each sector of the recording medium, two servo waveforms of different frequencies in two abutting servo tracks are preceded by a sync reference waveform of the same frequency in both servo tracks which is used as a reference for a phase locked oscillator, connected to the transducer, generating a pair of mudulation signals that are to be mixed with transducer signals from both servo waveforms. A pair of servo channels are provided for receiving the pair of modulation signals and the servo signals for deriving an imbalance error signal representing deviation of the transducer from the center line of a data path, which is the projection from the sectors of the common longitudinal boundary between servo tracks. The imbalance error signal is used to center the transducer on the data path.
328767
Darrah Edward R.
Sordello Frank J.
Touchton James J.
Kirby Eades Gale Baker
Sperry Rand Corporation
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