公开(公告)号：US5394278A

公开(公告)日：1995-02-28

申请号：US23590

申请日：1993-02-26

申请人： Per O. Pahr ,  Ladislav Rubas

发明人： Per O. Pahr ,  Ladislav Rubas

IPC分类号： G11B5/008 ,  G11B5/024 ,  G11B5/09 ,  G11B5/03

CPC分类号： G11B5/00817 ,  G11B5/024

摘要： Information may be erased from a magnetic tape with the tape being divided into at least two physical partitions. Each physical partition includes a plurality of data tracks carrying recorded data or the like and at least one set of servo tracks carrying position information dedicated to an area between the data tracks. At least one of the physical partitions may be erased during movement of the tape in a forward direction defined by moving the tape towards an end of tape designation, and at least a second of the physical partitions may be erased during the movement of the tape either in a backward direction defined by moving the tape towards the beginning of the tape or in the forward direction from the beginning of tape to the end of the tape.

摘要翻译： 可以将磁带从磁带上擦除信息，磁带被划分成至少两个物理分区。 每个物理分区包括承载记录数据等的多个数据轨道和携带专用于数据轨道之间的区域的位置信息的至少一组伺服轨道。 在通过将带移动到磁带指定的端部所限定的向前方向的磁带移动期间，可以擦除至少一个物理分区，并且至少第二个物理分区可以在磁带的移动期间被擦除 沿着将带朝向带的开始或从带的开始到带的末端向前的方向限定的向后方向。

公开(公告)号：US5379165A

公开(公告)日：1995-01-03

申请号：US34573

申请日：1993-03-19

申请人： Per O. Pahr

发明人： Per O. Pahr

IPC分类号： E04B1/58 ,  G11B5/008 ,  G11B5/584 ,  G11B5/55

CPC分类号： G11B5/584 ,  G11B5/00878

摘要： A method and apparatus for positioning a magnetic servo head relative to a servo track on a traveling magnetic tape both make use of the observation that a given tape in a given tape drive unit exhibits transverse tape movements during operation which constitute a "signature" waveform for the coupled tape cartridge and drive unit. In the method and apparatus, the transverse movements of a traveling tape in a drive unit are monitored to obtain the aforementioned waveform which is characteristic of the transverse movements for that tape, and the waveform is stored. The positioning of the servo head is controlled relative to a servo track on the tape using a control signal generated according to any known track seek algorithm. The stored waveform is recalled and is superimposed on the control signal, thereby significantly increasing the accuracy of the positioning of the servo head, which in turn increases the accuracy of positioning of the write/read head.

摘要翻译： 一种用于在行进磁带上相对于伺服磁道定位磁性伺服磁头的方法和装置，都利用了在给定的磁带驱动单元中给定磁带在操作期间显示横向磁带移动的观察结果，该结构构成了用于 连接的带盒和驱动单元。 在该方法和装置中，监视行驶带在驱动单元中的横向运动，以获得作为该带的横向运动特性的上述波形，并且存储波形。 使用根据任何已知的追踪算法生成的控制信号，相对于磁带上的伺服磁道来控制伺服磁头的定位。 存储的波形被调用并且叠加在控制信号上，从而显着提高伺服头的定位精度，这又提高了写/读头的定位精度。

公开(公告)号：US5293278A

公开(公告)日：1994-03-08

申请号：US850821

申请日：1992-03-13

申请人： Per O. Pahr

发明人： Per O. Pahr

IPC分类号： G11B5/02 ,  G11B5/29 ,  G11B5/49 ,  G11B15/12 ,  G11B19/02

CPC分类号： G11B5/02 ,  G11B15/12 ,  G11B19/02 ,  G11B5/4992

摘要： A circuit for selective switching through of read signals of a multiple magnetic head in a magnetic layer memory, wherein each magnetic system of a multiple magnetic head is associated with a preamplifier which has spatially separated input and final stages, the input stage being located directly on the multiple magnetic head and connected to the final stage by means of a flexible connecting line, the final stage being spatially associated with a read channel, the final stage having switching means for the selective closing of a current path between the final stage and the associated input stage by means of a selection signal, the input stage being so constructed to be in an idle state for as long as the associated final stage is not activated. Preferably, outputs of all the final stages are connected in parallel and coupled into the read channel across an output stage constructed as a differential voltage amplifier.

摘要翻译： 一种用于通过磁性层存储器中的多个磁头的读取信号进行选择性切换的电路，其中多个磁头的每个磁性系统与具有空间分离的输入和最后级的前置放大器相关联，所述输入级直接位于 多磁头并通过柔性连接线连接到最终级，最终级与读通道在空间上相关联，最后级具有用于选择性地关闭最终级与相关联的电流路径之间的电流路径的切换装置 通过选择信号输入级，输入级被构造为处于空闲状态，只要相关联的最终级未被激活。 优选地，所有最后级的输出并联连接并跨构造为差分电压放大器的输出级耦合到读通道。