公开(公告)号：EP1587067A2

公开(公告)日：2005-10-19

申请号：EP05252273.7

申请日：2005-04-12

Applicant: STMicroelectronics, Inc.

Inventor： Venca, Alessandro ,  Alini, Roberto ,  Posat, Baris

IPC: G11B5/02

CPC classification number: G11B5/02

Abstract: A write driver for driving a write current through a write head connected to the write head by an interconnect or flexible transmission line. The write driver includes a circuit matching an output impedance of the write driver to the odd characteristic impedance of the interconnect and includes a current source generating a current output to the write head. The write driver provides a current amplification effect as the output current is half the write current driven through the write coil. The impedance matching circuit includes an output resistor with a resistance equal to the odd characteristic impedance of the interconnect. The write driver includes a voltage source that operates to maintain a voltage drop of zero on the output resistor during the initial period of twice the transmission delay of the interconnect.

Abstract translation: 用于驱动写入电流的写入驱动器通过由互连或柔性传输线连接到写入头的写入头。 写入驱动器包括将写入驱动器的输出阻抗匹配到互连的奇特性阻抗的电路，并且包括产生到写入头的电流输出的电流源。 写入驱动器提供电流放大效应，因为输出电流是通过写入线圈驱动的写入电流的一半。 阻抗匹配电路包括具有等于互连的奇特性阻抗的电阻的输出电阻器。 写入驱动器包括电压源，该电压源用于在互连的传输延迟的两倍的初始时段期间在输出电阻器上保持零电压降。

公开(公告)号：EP1083549A3

公开(公告)日：2005-05-18

申请号：EP00307508.2

申请日：2000-08-31

Applicant: STMicroelectronics, Inc.

Inventor： Patti, Giuseppe ,  Alini, Roberto ,  DeNoyer, Gilles P.

IPC: G11B5/012 ,  G11B5/02

CPC classification number: G11B5/022 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09

Abstract: A circuit for controlling the write head (101) of a magnetic disk storage device includes a pull-up device (104) coupled to a terminal (101a) of the write head, for selectively providing a current to the write head through the terminal, parallel-connected first (106) and second (107) current sink circuits, each coupled to the write head terminal and selectively activated to draw current from the write head. A control circuit (130) individually activates the pull-up device and the first and second current sink circuits to reverse the direction of current flow through the write head. When the current nears the desired current level, the second current sink circuit is deactivated and the pull-up device is immediately activated for a predetermined period of time. Current overshoot and undershoot of the write head current is minimized.

公开(公告)号：EP1187102A2

公开(公告)日：2002-03-13

申请号：EP01307226.9

申请日：2001-08-24

Applicant: STMicroelectronics, Inc.

Inventor： Alini, Roberto ,  Lam, Quocdzung T. ,  Chew, Xiaokun Liu ,  MacCornack, Mark ,  Bezinque, David Joseph ,  Lee, Tehri ,  Le, Su Dang ,  de la Soujeole, Axel Alegre ,  Denoyer, Gilles

IPC: G11B5/012 ,  G11B5/09

CPC classification number: G11B5/022 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/40 ,  G11B2005/001 ,  G11B2005/0013

Abstract: A method is disclosed for controlling the write head of a magnetic disk storage device. The method includes sinking current from the first terminal (2A) of the write head (2) and sourcing current to the second terminal (2B) of the write head substantially simultaneously with sinking current from the first terminal so that a first steady state voltage level appears on the first terminal of the write head and a second steady state voltage level appears on the second terminal thereof that are approximately at a midpoint between a high reference voltage level and a low reference voltage level. The common mode voltage of the write head is substantially constant over time.

Abstract translation: 公开了一种用于控制磁盘存储装置的写入头的方法。 该方法包括从写入头（2）的第一端子（2A）吸收电流并且将源电流基本上与来自第一端子的吸收电流同时地馈送到写入头的第二端子（2B），使得第一稳态电压电平 出现在写入头的第一端子上，第二稳态电压电平出现在其第二端上，其大致在高参考电压电平和低参考电压电平之间的中点。 写头的共模电压随时间基本上是恒定的。