公开(公告)号：US06191909B1

公开(公告)日：2001-02-20

申请号：US09593315

申请日：2000-06-13

Applicant: Robert L. Cloke ,  David Price Turner ,  Robert Ellis Caddy, Jr. ,  Michael Rodger Spaur

Inventor： Robert L. Cloke ,  David Price Turner ,  Robert Ellis Caddy, Jr. ,  Michael Rodger Spaur

IPC: G11B503

CPC classification number: G11B19/02 ,  G11B5/012 ,  G11B5/09 ,  G11B5/455 ,  G11B20/10009 ,  G11B33/10 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0018

Abstract: A system for polling a preamplifier unit to remotely determine pre-established parametric values in a disk drive is disclosed. The disk drive comprises a controller, a preamplifier, and a plurality of transducers. The system for polling the preamplifier comprises means in the controller for generating a succession of serial bit characters each representative of a different pattern. A means is provided for successively transferring said serial bit characters from the controller to the preamplifier unit. A plurality of individual bit lines are provided in the preamplifier unit representative of at least one parametric value. A means is included in the preamplifier unit for comparing each serial bit pattern character received with said plurality of individual bit lines, and for generating a match signal when a serial bit pattern character received matches the plurality of individual bit lines. A means is provided for transferring the match signal from the preamplifier unit to the controller.

Abstract translation: 公开了一种用于轮询前置放大器单元以远程确定盘驱动器中的预先确定的参数值的系统。 磁盘驱动器包括控制器，前置放大器和多个换能器。 用于轮询前置放大器的系统包括控制器中的装置，用于产生代表不同模式的一系列串行位字符。 提供了用于将所述串行比特字符从控制器连续传送到前置放大器单元的装置。 在前置放大器单元中提供表示至少一个参数值的多个单独的位线。 一个装置包括在前置放大器单元中，用于比较接收到的所述多个单独位线的每个串行位模式字符，并且用于当接收的串行位模式字符匹配多个单独位线时产生匹配信号。 提供了用于将匹配信号从前置放大器单元传送到控制器的装置。

公开(公告)号：US06111717A

公开(公告)日：2000-08-29

申请号：US36375

申请日：1998-03-06

Applicant: Robert L. Cloke ,  David Price Turner ,  Robert Ellis Caddy, Jr. ,  Michael Rodger Spaur

Inventor： Robert L. Cloke ,  David Price Turner ,  Robert Ellis Caddy, Jr. ,  Michael Rodger Spaur

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/09 ,  G11B5/455 ,  G11B19/02 ,  G11B20/10 ,  G11B33/10 ,  G11B5/02

CPC classification number: G11B19/02 ,  G11B20/10009 ,  G11B5/012 ,  G11B5/09 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0018 ,  G11B33/10 ,  G11B5/455

Abstract: A disk drive comprising a plurality of read/write transducers, a programmable preamplifier, and a controller for furnishing control and data signals to the programmable preamplifier and for receiving data signals therefrom, is disclosed. The programmable preamplifier comprising a write data input circuit for receiving data signals to be supplied to a transducer, a read data output circuit for manifesting data signals supplied to said preamplifier unit by a transducer, and a transducer interface circuit for providing write data signals to a transducer and receiving read data signals from a transducer. The programmable preamplifier further comprises a multiplexer comprising a first multiplexer input connected to receive a first internal digital signal, a second multiplexer input connected to receive a second internal digital signal, a control input connected to receive a control signal for selecting between the first and second internal digital signals, and a multiplexer output for outputting the selected first or second internal digital signal. The multiplexer output is connected to an output terminal of the programmable preamplifier. The programmable preamplifier comprises a serial interface circuit for receiving serially presented control signals from the associated controller, including the control signal for selecting between the first and second internal digital signals.

Abstract translation: 公开了一种包括多个读/写换能器，可编程前置放大器和用于向可编程前置放大器提供控制和数据信号并用于从其接收数据信号的控制器的盘驱动器。 可编程前置放大器包括用于接收要提供给换能器的数据信号的写数据输入电路，用于显示由换能器提供给所述前置放大器单元的数据信号的读数据输出电路，以及用于向 传感器和从换能器接收读取数据信号。 可编程前置放大器还包括多路复用器，其包括连接以接收第一内部数字信号的第一多路复用器输入，连接以接收第二内部数字信号的第二多路复用器输入端，连接以接收用于在第一和第二数字信号之间进行选择的控制信号的控制输入 内部数字信号和用于输出所选择的第一或第二内部数字信号的多路复用器输出。 多路复用器输出连接到可编程前置放大器的输出端。 可编程前置放大器包括用于从相关联的控制器接收串行呈现的控制信号的串行接口电路，包括用于在第一和第二内部数字信号之间进行选择的控制信号。

公开(公告)号：US5726821A

公开(公告)日：1998-03-10

申请号：US577606

申请日：1995-12-22

Applicant: Robert L. Cloke ,  David Price Turner ,  Robert Ellis Caddy, Jr. ,  Michael Rodger Spaur

Inventor： Robert L. Cloke ,  David Price Turner ,  Robert Ellis Caddy, Jr. ,  Michael Rodger Spaur

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/09 ,  G11B5/455 ,  G11B19/02 ,  G11B20/10 ,  G11B33/10 ,  G11B5/03

CPC classification number: G11B19/02 ,  G11B20/10009 ,  G11B5/012 ,  G11B5/09 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B2005/0018 ,  G11B33/10 ,  G11B5/455

Abstract: A disk drive preamplifier unit includes a serial interface circuit for receiving serially formatted control signals from an associated disk drive controller. The control signals contain several types of information, including head select, write current magnitude, bias for MR transducers, gain magnitude for a variable gain amplifier, and test and mode information. The preamplifier unit incorporates several test circuits in addition to the usual write unsafe detector circuit, and a multiplexer controlled by the mode control signals from the serial interface unit is used to select which test circuit or detector is coupled to a common test output terminal whose signals are coupled back to the controller for further processing. The preamplifier can be used to remotely test the head population of the head disk assembly, to measure the MR bias current through any of the MR transducers and to signal the controller in response to polling characters when a match is obtained between a character and preestablished multi-bit parameter information fixed in the preamplifier unit. A write current generator is shared by the write transducers and the MR bias test circuit, with a current scaling unit used to provide different current ranges from the common source. The preamplifier unit affords remote control and testing which can be adapted to evolving systems using firmware changes alone.

Abstract translation: 磁盘驱动器前置放大器单元包括用于从相关联的磁盘驱动器控制器接收串行格式化的控制信号的串行接口电路。 控制信号包含几种类型的信息，包括头部选择，写入电流幅度，MR换能器的偏置，可变增益放大器的增益幅度以及测试和模式信息。 前置放大器单元除了通常的写入不安全检测器电路之外还包括多个测试电路，并且由来自串行接口单元的模式控制信号控制的多路复用器用于选择哪个测试电路或检测器耦合到公共测试输出端，其信号 被耦合回控制器用于进一步处理。 前置放大器可用于远程测试头盘组件的头部群体，以测量通过任何MR换能器的MR偏置电流，并且当在字符和预先建立的多个像素之间获得匹配时响应于轮询字符来发信号通知控制器 位参数信息固定在前置放大器单元中。 写入电流发生器由写入传感器和MR偏置测试电路共享，电流缩放单元用于提供来自公共源的不同电流范围。 前置放大器单元提供远程控制和测试，可以使用固件更改来适应不断发展的系统。