公开(公告)号：WO1994011864A1

公开(公告)日：1994-05-26

申请号：PCT/US1993010839

申请日：1993-11-10

Applicant: HARDISK TECHNOLOGY

Inventor： HARDISK TECHNOLOGY ,  CRIBBS, Daniel, F. ,  ELLENBERGER, Michael, L. ,  HASSLER, John, Wade, Jr.

IPC: G11B05/596

CPC classification number: G11B5/59633

Abstract: The present disclosure relates to a disk drive (10) comprising a rotating disk (12) with a recording surface (14), a transducer (16) in communication with the surface and swept radially over the surface by a servo-actuator (18), a variable gain read amplifier (20) connected to the transducer, an analog-to-digital convertor ADC (22) attached to the variable gain amplifier, an erase frequency oscillator (24) coupled to the transducer for erasing of the disk surface, a memory (26) for storing digital outputs appearing at the ADC, and a controller for signalling the servo-actuator (30) to move to such radial positions that result in transducer read amplitudes that are a percentage of previous read amplitudes represented in the digital memory. Bit-synchronism between tracks is maintained by writing an initial clock track with closure and then writing a next clock track including a regular sequence of clock bursts a half-track space offset such that the initial clock track can be read in between writing clock bursts and the read signal is used to frequency-lock an oscillator (29) which is used as a reference for the writing of clock bursts of the next track. A checkerboard pattern of clock bursts is thus created.

Abstract translation: 本发明涉及包括具有记录表面（14）的旋转盘（12）的磁盘驱动器（10），与表面连通并通过伺服致动器（18）在表面上径向掠过的换能器（16） ，连接到所述换能器的可变增益读取放大器（20），连接到所述可变增益放大器的模数转换器ADC（22），耦合到所述换能器以擦除所述盘表面的擦除频率振荡器（24） 用于存储出现在ADC处的数字输出的存储器（26）以及用于发信号通知伺服致动器（30）移动到这样的径向位置的控制器，该径向位置导致换能器读数幅度是数字中表示的先前读取幅度的百分比 记忆。 通过写入具有闭合的初始时钟轨道来保持轨道之间的位同步，然后写下一个包括时钟脉冲串的规则序列的下一个时钟轨迹，半时隙空间偏移，使得初始时钟轨迹可以在写时钟脉冲串和 该读取信号用于频率锁定振荡器（29），该振荡器用作下一个磁道的时钟脉冲串的写入的参考。 因此创建了时钟突发的棋盘图案。