公开(公告)号：DE2657266A1

公开(公告)日：1977-07-07

申请号：DE2657266

申请日：1976-12-17

Applicant: IBM

Inventor： DENNISON JAMES CLIFFORD ,  OTTESEN HJALMAR HOLMBOE

IPC: G11B21/08 ,  G11B5/596 ,  G11B21/10

Abstract: RECORD TRACK FOLLOWING AND SEEKING An improved servo block pattern bands a plurality of parallel record tracks into a track seek and follow band. Servo block positions in the record tracks, plus the longitudinal duration of the signal bursts enable simultaneous track seeking and following within a band of tracks. Servo apparatus operable with such patterns adapt to amplitude variations of the servo readback signal to reduce the effect of amplitude variations on servo performance. The servo blocks may have differing frequencies or correlation patterns for enhancing track seek and follow functions.