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公开(公告)号：US3577132A
公开(公告)日：1971-05-04
申请号：US3577132D
申请日：1968-06-06
Applicant: IBM
Inventor： ANDERSON DONALD E , KOCH LAWRENCE M , LLOYD ROBERT E , SORDELLO FRANK J
CPC classification number: G11B20/16
Abstract: A phase-locked oscillator useful for a magnetic storage system receives timing pulses from a means for generating reference pulses connected to a rotary storage medium. Variations in the angular velocity and phase of the rotating storage medium result in corresponding variations of frequency and phase of a voltagecontrolled oscillator, which controls the write or record circuitry. During readout, the phase-locked oscillator is employed to locate the selected data records accurately.
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