公开(公告)号：GB2131220B

公开(公告)日：1986-09-10

申请号：GB8327425

申请日：1983-10-13

Applicant: BASF AG

Inventor： FELLEISEN PETER ,  KRUG ARIBERT ,  GROSSHANS PETER

IPC: G01R33/12 ,  G11B5/00 ,  G11B5/09 ,  G11B5/84 ,  G11B20/10 ,  G11B20/18 ,  G01R33/00

Abstract: A method and circuit arrangements for detecting and evaluating dropouts or drop-ins on recording media, comprising reading and modifying the recorded digital signals, the size and type of fault being evaluated on the basis of fixed threshold levels. In the case of a dropout, for example, the fault is weighted by determining the differential of the envelope of the read signal. In the case of a drop-in, other noise signals are left out of consideration by nonlinear emphasis of the drop-in and appropriate choice of the threshold value. A circuit combination enables both dropouts and drop-ins to be detected and evaluated.

公开(公告)号：DE3377830D1

公开(公告)日：1988-09-29

申请号：DE3377830

申请日：1983-04-05

Applicant: BASF AG

Inventor： SCHAEFER DIETER DR ,  FELLEISEN PETER ,  DOMAS FRIEDRICH ,  MAYER DIETER DR

IPC: G11B5/842 ,  G11B5/84 ,  G11B5/845

公开(公告)号：GB2131220A

公开(公告)日：1984-06-13

申请号：GB8327425

申请日：1983-10-13

Applicant: BASF AG

Inventor： FELLEISEN PETER ,  KRUG ARIBERT ,  GROSSHANS PETER

IPC: G01R33/12 ,  G11B5/00 ,  G11B5/09 ,  G11B5/84 ,  G11B20/10 ,  G11B20/18 ,  G01R33/00

Abstract: A method and circuit arrangements for detecting and evaluating dropouts or drop-ins on recording media, comprising reading and modifying the recorded digital signals, the size and type of fault being evaluated on the basis of fixed threshold levels. In the case of a dropout, for example, the fault is weighted by determining the differential of the envelope of the read signal. In the case of a drop-in, other noise signals are left out of consideration by nonlinear emphasis of the drop-in and appropriate choice of the threshold value. A circuit combination enables both dropouts and drop-ins to be detected and evaluated.

公开(公告)号：DE3065149D1

公开(公告)日：1983-11-10

申请号：DE3065149

申请日：1980-06-23

Applicant: BASF AG

Inventor： FELLEISEN PETER ,  MAYER DIETER DR ,  KOESTER EBERHARD DR ,  DOMAS FRIEDRICH ,  DEIGNER PAUL DR

IPC: C09D5/23 ,  G11B5/70 ,  G11B5/716 ,  G11B5/718 ,  G11B5/84 ,  G11B5/842

Abstract: A magnetic recording disk comprising a non-magnetic substrate and two or more firmly adhering magnetizable layers applied to one or both sides thereof, the layer located directly on the substrate being magnetically isotropic, while the second layer and any additional layers exhibit orientation of the anisotropic magnetic particles parallel to the substrate and to the envisaged recording direction.