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1. 发明授权

EP1309967B1 METHOD AND POSITION CONTROL FOR A SERVO SYSTEM FOR POSITIONING A HEAD LATERALLY WITH RESPECT TO DEFINED SERVO TRACKS 有权
标题翻译：方法和定位的动力系统用于磁头相对于定义的功率TRACKS横向定位
公开(公告)号：EP1309967B1
公开(公告)日：2004-09-08
申请号：EP01947657.1
申请日：2001-07-06
申请人： International Business Machines Corporation
发明人： BUI, Nhan, Xuan , KOSKI, John, Alexander , SASAKI, Akimitsu, Clover Hill Apt. D4 , TSURUTA, Kazuhiro
IPC分类号： G11B5/58 , G11B21/10 , G11B21/08 , G11B5/584 , G11B5/55
CPC分类号： G11B5/584 , G11B5/5508 , G11B21/088 , G11B21/103
摘要： A method and position control for a servo system for positioning a head laterally with respect to defined servo tracks. The servo system comprises a servo sensor and detector (115) for sensing lateral position of the head (15) and a compound actuator (14) having a fine actuator portion (20) and a coarse actuator portion (16). The position control (116) provides position indications for the coarse actuator portion (16), which may comprise a table relating predetermined nominal lateral position indications to the defined servo tracks. The position control (116) positions the coarse actuator portion (116) at an estimated position with respect to the defined servo tracks, and responds to the servo sensor to determine which servo track is closest to the estimated position. The position control (116) sets the coarse actuator portion (16) position indication to the predetermined nominal lateral position indication of the closest defined servo track, e.g., by looking it up in the table. This thereby corrects the indication of the position of the coarse actuator portion (16).

2. 发明授权

EP1036392B1 OPTICAL SERVO SYSTEM FOR A TAPE DRIVE 有权
标题翻译：光功率系统磁带机
公开(公告)号：EP1036392B1
公开(公告)日：2002-08-07
申请号：EP98961832.7
申请日：1998-11-30
申请人： STORAGE TECHNOLOGY CORPORATION
发明人： LEONHARDT, Michael, Lawrence , WILSON, Scott, David
IPC分类号： G11B21/08 , G11B21/10 , G11B27/26 , G11B15/08 , G11B5/55 , G11B5/584
CPC分类号： G11B27/107 , G11B5/5508 , G11B5/584 , G11B5/588 , G11B15/08 , G11B15/602 , G11B20/00086 , G11B20/0021 , G11B21/085 , G11B21/103 , G11B27/26 , G11B27/36 , G11B2220/90
摘要： The optical servo system for a tape drive (600) that functions to align a read/write head (605) with the data tracks written on a recording surface of a tape by reading optical servo tracks (110) that are formed on the back side (101) of the tape (100). This process decouples the magnetic recording of data on the recording surface of the tape from the optical servo system which makes use of servo tracks formed on the back side of the tape. The data storage capacity of the tape is increased since the entire recording surface of the tape is filled with data tracks and the precise alignment of the read/write head makes it possible to place the data tracks closer together. Regions of contrasting reflectivity or phase (650) are also provided on a surface of the read/write head to enable the optical servo system (607) to view an image of both the read/write head and the entire back side of the tape to thereby align the movable read/write head with the data tracks.

3. 发明公开

EP0996127A3 Method for tracking control 有权
标题翻译：一种用于跟踪控制方法
公开(公告)号：EP0996127A3
公开(公告)日：2001-01-24
申请号：EP99118991.1
申请日：1999-09-27
申请人： DEUTSCHE THOMSON-BRANDT GMBH
发明人： Kaaden, Jürgen , Mahr, Peter
IPC分类号： G11B21/10 , G11B11/10 , G11B5/584 , G11B11/105
CPC分类号： G11B5/584 , G11B5/5508 , G11B7/0031 , G11B11/10547 , G11B11/10576 , G11B11/10578 , G11B21/086 , G11B21/103
摘要： The invention relates to a method for tracking control of a head unit with respect to data tracks on a data medium and in particular on a magnetic tape. On the magnetic tape, the data tracks are split into successive data sections which, for their part, are each divided into an initial region (22) and a useful region (23). At least one control track (18a) extends over the entire length of the data section, in each data section. In addition to this, an additional control track (18b,18c) is provided in the initial region of each data section, and is likewise used for tracking control. The data for tracking control, which are obtained while the initial region is moving past a head unit, are also used in order to improve the tracking control while the useful region is moving past the head unit. Fast and good tracking control is achieved in this way. The invention also relates to a recording method which is matched according to the method of the invention for tracking control.

4. 发明公开

EP0890950A3 Serial bitstream code for timing-based servo 失效
标题翻译：用于基于时序的伺服的串行比特流代码
公开(公告)号：EP0890950A3
公开(公告)日：2000-12-27
申请号：EP98305284.6
申请日：1998-07-02
申请人： International Business Machines Corporation
发明人： Albrecht, Thomas Robert , Jaquette, Glen Alan
IPC分类号： G11B21/10 , G11B5/584
CPC分类号： G11B5/5508 , G11B5/584 , G11B15/602 , G11B21/086 , G11B21/103 , G11B27/3027
摘要： Disclosed is a coding technique which takes advantage of the use of an internal synchronization technique for a timing-based servo which employs alternating 4 and 5 transition bursts of servo to provide a simplified synchronization of the data, and comprises a coding technique which employs a periodic pattern (63) of bursts each period comprising two bursts of 5 transitions (82) followed by two bursts (80,81) of 4 transitions. The code provides, in each burst of 5 transitions, two defined positions for the 2nd and 4th transitions, spaced from equally spaced positions in the burst, to represent each of two bit values. The code provides, in each burst of 4 transitions, two defined positions for the 2nd and 3rd transitions, spaced from equally spaced positions in the burst, to represent each of two bit values. The bitstream is encoded in words comprised of one or more 4 bit symbols, the words separated by a 6 bit word separator symbol, 2 of the symbols of the possible 16 employed for the word separator symbol, leaving 14 symbols available for data.
摘要翻译：本发明公开了一种编码技术，其利用内部同步技术用于基于定时的伺服，其使用交替的4和5个伺服变换脉冲以提供数据的简化同步，并且包括采用周期性每个周期的脉冲串模式（63）包括5次转换的两个突发（82），随后是4次转换的两个突发（80,81）。该代码在每个5次转换突发中提供了第二次和第四次转换的两个定义位置，它们与突发中的等间隔位置间隔开，以表示两个位值中的每一个。该代码在每次4个跳变突发中提供了第二次和第三次跳变的两个定义位置，这些位置与突发中的等间隔位置间隔开，以表示两个比特值中的每一个。比特流被编码成由一个或多个4比特符号组成的字，由6比特字分隔符符号分隔的字，用于字分隔符符号的可能16的符号中的2个符号，剩下14个符号可用于数据。

5. 发明公开

EP0877230A2 Circuit for lateral photoeffect position sensor 失效
标题翻译： SchaltungfürLateral-Photoeffekt-Positionssensor
公开(公告)号：EP0877230A2
公开(公告)日：1998-11-11
申请号：EP97121688.2
申请日：1997-12-09
申请人： Hewlett-Packard Company
发明人： Fasen, Donald J.
IPC分类号： G01D5/26
CPC分类号： G11B21/088 , G01B7/02 , G01D5/26 , G11B5/5508 , G11B5/5526 , G11B5/58 , G11B5/584 , G11B5/596 , G11B21/103
摘要： A circuit (50) provides a normalized position signal (DIFF) in response to a position of an illuminated spot (45) on a lateral effect photosensor (44). The photosensor (44) provides a concurrent pair of analog signals (IA,IB). The spot (45) is illuminated by a light emitting diode (42,74). The circuit (50) includes a summing circuit (A4) that provides a sum signal (SUM) in response to an algebraic sum of the pair of signals (IA,IB), a first difference circuit (A3) that provides the position signal (DIFF) in response to the algebraic difference between the pair of signals (IA,IB), and a second difference circuit (A5) that provides an error signal (DL) in response to the algebraic difference between a reference signal (VINT) and the sum signal (SUM). The error signal (DL) is coupled to the light emitting diode (74) for governing an intensity of the spot (45), thereby normalizing the position signal (DIFF).
摘要翻译：电路（50）响应于横向效应光电传感器（44）上的照明光点（45）的位置提供归一化位置信号（DIFF）。光传感器（44）提供并行的一对模拟信号（IA，IB）。点（45）由发光二极管（42,74）照亮。电路（50）包括求和电路（A4），该求和电路（A4）响应于该对信号（IA，IB）的代数和提供和信号（SUM），提供位置信号的第一差分电路（A3） DIFF）响应于所述一对信号（IA，IB）之间的代数差异;以及第二差分电路（A5），其响应于参考信号（VINT）和所述信号（VINT）之间的代数差异提供误差信号和信号（SUM）。误差信号（DL）耦合到发光二极管（74），用于控制点（45）的强度，从而使位置信号（DIFF）归一化。

6. 发明公开

EP0677844A1 Système de lecture d'un support d'enregistrement multipiste 失效转让
标题翻译： Lesesystemfüreinen Mehrspur-Aufzeichnungsträger。
公开(公告)号：EP0677844A1
公开(公告)日：1995-10-18
申请号：EP95400782.9
申请日：1995-04-07
申请人： THOMSON-CSF
发明人： Colineau, Joseph
IPC分类号： G11B21/10 , G11B5/49 , G11B21/00
CPC分类号： G11B5/4969 , G11B21/006 , G11B21/103
摘要： Système de lecture d'un support d'enregistrement multipiste comportant un dispositif permettant de lire, sur la largeur de chaque piste, un nombre n d'échantillons d'information.
Ce système comporte :

un filtre (1) permettant d'effectuer plusieurs combinaisons de plusieurs échantillons d'une piste, ces combinaisons étant décalées entre elles d'un ou plusieurs échantillons ;
un circuit de sous-échantillonnage (2) choisissant dans les différentes combinaisons d'une piste, sous la commande d'un prédicteur de position (3), une combinaison déterminée ;
un circuit de calcul d'erreur (4) de position calculant l'erreur de position de la combinaison choisie et fournissant un signal de correction d'erreur (e i ) au prédicteur de position(3).

Applications : Lecture de bandes magnétiques.
摘要翻译：该系统包括对轨道执行几个样本组合的滤波器（1）。不同的组合相对于彼此移位。另外的子采样电路（2）在位置预测器的控制下以不同的组合从轨道中选择不同的采样组合。位置误差计算电路（4）确定所选位置的误差，并向位置预测器（3）提供纠错信号（ei）。

7. 发明公开

EP0627113A1 SUPPORT D'ENREGISTREMENT D'INFORMATIONS, ENREGISTREUR, LECTEUR ET PROCEDE D'ENREGISTREMENT 失效转让
标题翻译： DATE记录载体，记录，WIEDEGABEGERAT和方法进行记录。
公开(公告)号：EP0627113A1
公开(公告)日：1994-12-07
申请号：EP94902843.0
申请日：1993-12-21
申请人： THOMSON-CSF , THOMSON CONSUMER ELECTRONICS (S.A.)
发明人： MAURICE, François , COLINEAU, Joseph , HANNA, Charaf , SONRIER, Michel
IPC分类号： G11B20 , G11B5 , G11B7 , G11B11 , G11B15 , G11B21
CPC分类号： G11B5/4969 , G11B5/00813 , G11B5/00821 , G11B5/584 , G11B7/0045 , G11B11/10547 , G11B15/12 , G11B20/00 , G11B21/10 , G11B21/103
摘要： Système d'enregistrement-lecture de support d'enregistrement dans lequel on répartit sur la piste des groupes (G0) des pistes à composantes continues positives et des groupes (G1) de pistes à composantes continues négatives. A la lecture on intègre pour chaque piste les valeurs des différents signaux. Puis d'une part, un premier circuit d'addition S1 additionne les résultats d'intégration des premières pistes de chaque groupe de pistes, d'autre part, un deuxième circuit d'addition S2 additionne les résultats d'intégration des dernières pistes de chaque groupe de pistes. Un circuit de comparaison (CD) compare les résultats des additions des deux circuits d'addition pour corriger le suivi de piste. Applications: lecture de support d'informations haute densité.

8. 发明授权

EP0356959B1 Tracking error detecting circuit 失效
标题翻译：跟踪误差检测电路。
公开(公告)号：EP0356959B1
公开(公告)日：1994-10-12
申请号：EP89115832.1
申请日：1989-08-28
申请人： SONY CORPORATION
发明人： Uchida, Kazuhiro , Yamamoto, Kikuo
IPC分类号： G11B15/467 , G11B5/592
CPC分类号： G11B15/4678 , G11B5/5921 , G11B15/4675 , G11B21/103

9. 发明授权

EP0383377B1 Arrangement for reproducing an electric signal 失效
标题翻译：排列用于再现的电信号。
公开(公告)号：EP0383377B1
公开(公告)日：1994-09-28
申请号：EP90200267.4
申请日：1990-02-07
申请人： Philips Electronics N.V.
发明人： Kahlman, Josephus Arnoldus Henricus Maria
IPC分类号： G11B21/10
CPC分类号： G11B5/588 , G11B7/0946 , G11B15/463 , G11B15/4675 , G11B21/103

10. 发明授权

EP0316566B1 Verfahren zur Gewinnung eines Regelsignals für eine automatische Spurnachführung 失效
标题翻译：用于获取自动跟踪控制信号的方法
公开(公告)号：EP0316566B1
公开(公告)日：1993-05-26
申请号：EP88116729.0
申请日：1988-10-08
申请人： GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG.
发明人： Elsässer, Dieter GRUNDIG E.M.V.
IPC分类号： G11B15/467 , G11B5/588
CPC分类号： G11B15/467 , G11B5/588 , G11B21/103

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