公开(公告)号：DE1254184B

公开(公告)日：1967-11-16

申请号：DEJ0028555

申请日：1965-07-10

Applicant: IBM

Inventor： HALFHILL MARTIN ORA ,  STEPHENS HAROLD CLARK

IPC: G11B20/14 ,  G11B20/16 ,  H04L7/027

公开(公告)号：DE2226882A1

公开(公告)日：1973-03-15

申请号：DE2226882

申请日：1972-06-02

Applicant: IBM

Inventor： STEPHENS HAROLD CLARK

IPC: G05B5/01 ,  G05B13/02 ,  G05D3/14

公开(公告)号：DE3375852D1

公开(公告)日：1988-04-07

申请号：DE3375852

申请日：1983-10-17

Applicant: IBM

Inventor： STEPHENS HAROLD CLARK ,  WORKMAN MICHAEL LEE

IPC: G05D3/12 ,  G11B5/596 ,  G11B21/08 ,  G11B21/10

Abstract: A servo system for a magnetic disk file having a voice coil motor (VCM) actuator generates a position error signal (PES) from servo information recorded on one of the disks. An electrical model of the VCM is employed through which a measure of the VCM electrical current is passed to generate a simulated PES signal which is continuous even if the regular PES is sampled or intermittent.

公开(公告)号：DE1273563B

公开(公告)日：1968-07-25

申请号：DEJ0029660

申请日：1965-12-21

Applicant: IBM

Inventor： HALFHILL MARTIN ORA ,  STEPHENS HAROLD CLARK

IPC: G11B5/09 ,  G11B20/10 ,  G11B20/14 ,  H03K5/13 ,  H04L7/06 ,  H04L25/49