公开(公告)号：CA2207899A1

公开(公告)日：1997-05-01

申请号：CA2207899

申请日：1996-10-17

Applicant: QUANTUM CORP

Inventor： VEA MATHEW P ,  NGUYEN HUNG C ,  PATAPOUTIAN ARA

IPC: G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B20/18 ,  G11B21/10 ,  G11B27/30 ,  H03M13/23 ,  H04L25/49 ,  G11B20/14

Abstract: A synchronous sampling data detection channel includes a data transducer head (26) positioned by a servo-controlled actuator (32) over a recording track of a rotating data storage disk (16), a preamplifier (28) for receiving electrical analog signals magnetically induced by the data transducer head (26) from flux transitions present in at least the servo information field, a digital sampler (46) for sychronously sampling the electrical analog signals to produce digital samples, and a Viterbi detector coupled to receive digital samples from the synchronous sampling data detection channel for decoding 1/4 T coded wide biphase servo information patterns as maximum likelihood servo data sequences, wherein the wide biphase magnet patterns are arranged e.g. as ++-- magnet patterns for a binary zero information value and --++ magnet patterns for a binary one information value.

公开(公告)号：DE19911470B4

公开(公告)日：2005-02-03

申请号：DE19911470

申请日：1999-03-15

Applicant: QUANTUM CORP

Inventor： PATAPOUTIAN ARA ,  STANDER JENNIFER ,  MCEWEN PETER ,  ZAFER BAHJAT ,  FITZPATRICK JAMES

IPC: G11B20/14 ,  G11B5/09 ,  G11B20/10 ,  H03M5/14 ,  H03M7/14 ,  G11B5/02

公开(公告)号：GB2347599B

公开(公告)日：2003-08-27

申请号：GB9930869

申请日：1999-12-24

Applicant: QUANTUM CORP

Inventor： PATAPOUTIAN ARA ,  WENG LIH-JYH

IPC: G11B20/14 ,  H03M7/12 ,  H03M13/31 ,  H03M5/14 ,  H03M7/00

公开(公告)号：AU5613898A

公开(公告)日：1998-07-15

申请号：AU5613898

申请日：1997-12-18

Applicant: QUANTUM CORP

Inventor： PATAPOUTIAN ARA ,  FISHER KEVIN D ,  BUCH BRUCE D

IPC: G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B20/12 ,  G11B21/08 ,  G11B21/10 ,  H03M1/20 ,  H03M1/48

Abstract: An analog-to-digital converter circuit in a sampling data detection channel of a disk drive synchronously samples user data in the data track areas at a first quantization resolution and samples servo bursts from the spoke areas at a second quantization resolution effectively greater than said first quantization resolution. An offset circuit provides a predetermined analog offset signal to a combining circuit which combines it with an incoming analog signal to provide a composite signal during a spoke servo burst sampling interval. An analog-to-digital converter samples the composite signal during the servo spoke burst sampling interval, and synchronously samples the analog signal during a user data sampling interval. A digital averaging circuit averages the servo spoke samples over a predetermined averaging interval to provide averaged burst samples having increased bit resolution.

公开(公告)号：CA2208074A1

公开(公告)日：1997-05-01

申请号：CA2208074

申请日：1996-10-17

Applicant: QUANTUM CORP

Inventor： PATAPOUTIAN ARA ,  AKIN WILLIAM R JR ,  VEA MATHEW P ,  FISHER KEVIN D ,  LEIS MICHAEL D ,  HENSON JAMES A ,  EHRLICH RICHARD M

IPC: G11B20/14 ,  G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B20/18 ,  G11B21/08 ,  G11B21/10 ,  G11B27/30 ,  H03M13/23 ,  H04L25/49 ,  G11B5/09

Abstract: A magnetic disk drive (10) data storage disk (16) defines recording tracks divided into data sectors by narrow servo spokes. A data sector lying between servo spokes is recorded with user data encoded in accordance with a code having a predetermined distance and user data code rate. Each servo spoke of the recording area has at least one servo information field encoded in a wide bi-phase code pattern. The disk drive (10) further includes a synchronous sampling data detection channel having a data transducer head (26) positioned by a servo-controlled actuator (67) over the recording track, a preamplifier (28) for receiving electrical analog signals magnetically induced by the data transducer head (26) from flux transitions present in at least the servo information field, a digital sampler (46) for synchronously sampling the electrical analog signals to produce digital samples, and wide bi-phase decoding circuitry (52) coupled to receive digital samples from the synchronous sampling data detection channel for decoding the wide bi-phase code pattern.