公开(公告)号：WO1991002352A1

公开(公告)日：1991-02-21

申请号：PCT/US1990004208

申请日：1990-07-26

Applicant: LITERAL CORPORATION

Inventor： LITERAL CORPORATION ,  RICHGELS, Jerome, Francis ,  KUKLEWICZ, John, Charles

IPC: G11B07/085

CPC classification number: G11B21/083 ,  G11B7/08529

Abstract: At the conclusion of a track seek operation, handoff to track following servo control is delayed for a short time period during which the drive microprocessor (30) determines if the head (10) has failed to stop at the target track by sensing the occurrence of a predetermined number of track crossing pulses, the detection of which causes iterative generation and application of braking current pulses to the head actuator motor (11). The amplitude and duration of each braking current pulse is chosen to cause forward motion of the head (10) to be retarded to a predetermined percent of its pre-existing velocity. The microprocessor routine includes provision for iteratively determining when the head (10) has slowed to a velocity which allows the track following servo (16) to acquire control of the head (10).

公开(公告)号：WO1994009564A1

公开(公告)日：1994-04-28

申请号：PCT/US1993009867

申请日：1993-10-13

Applicant: LITERAL CORPORATION

Inventor： LITERAL CORPORATION ,  LEE, Tzuo-Chang ,  LAUFFENBURGER, James, H. ,  POPOVICH, Steve, S.

IPC: H03H17/06

CPC classification number: H03H17/06

Abstract: An apparatus and method for filtering intersymbol interference from an information signal generated from a storage medium. This apparatus utilizes a delay line (50), gain devices (51) summing devices (52), and has specified transfer functions. Furthermore, this apparatus and method can make real time adjustments in order to maintain an optimal level of filtering.

Abstract translation: 一种用于从存储介质产生的信息信号中滤除符号间干扰的装置和方法。 该装置利用延迟线（50），增益装置（51）求和装置（52），并具有指定的传送功能。 此外，该装置和方法可以进行实时调整，以保持最佳的滤波电平。

公开(公告)号：WO1991002351A1

公开(公告)日：1991-02-21

申请号：PCT/US1990004209

申请日：1990-07-26

Applicant: LITERAL CORPORATION

Inventor： LITERAL CORPORATION ,  RICHGELS, Jerome, Francis

IPC: G11B05/596

CPC classification number: G11B21/085

Abstract: A random access information storage disk drive system of the optical or magneto-optical type with the read/write head (11) mounted between parallel flexures (20, 21) for suspension in a linear actuator motor (25). Dynamic spring force compensation is provided incrementally as the head (11) is moved radially inward and outward of the at-rest position of the flexures (20, 21) to compensation for the increasing restoring force exerted by the flexures (20, 21) as the head (11) is moved towards the extremes of its tracking path.