-
1.发明公开
公开(公告)号：EP1083550A2
公开(公告)日：2001-03-14
申请号：EP00307519.9
申请日：2000-08-31
Applicant: STMicroelectronics, Inc.
Inventor： Patti, Giuseppe , Alini, Roberto , Pakriswamy, Elango
Abstract: A circuit (102,103) for controlling the write head (101) of a magnetic disk storage device includes a pull-up device (104) for selectively providing a current to the write head and a current sink circuit (106) selectively activated to draw current from the write head. A bootstrap circuit (108) is coupled to the current sink circuit. When reversing the direction of current flow through the write head from a first direction to the write head to a second direction from the write head terminal, the bootstrap circuit and the current sink circuit are activated to rapidly draw current from the write head. When the current in the write head nears and/or slightly surpasses the desired destination level, the bootstrap circuit is deactivated.
Abstract translation: 一种用于控制磁盘存储装置的写入头（101）的电路（102,103）包括用于选择性地提供电流，以写头和一个电流吸收电路（106）的上拉设备（104）选择性地激活以汲取电流 从写头。 自举电路（108）被耦合到所述电流宿电路。 倒车时电流流过写入头从第一方向到写入头从写头端的第二方向的方向上，自举电路和所述电流宿电路被激活以快速绘制从写入头的电流。 当在写头的当前接近和/或略优于期望的目的地级，自举电路被停用。
-
Patent Agency Ranking2.发明公开Circuit and method for writing to a memory disk 有权Schaltung und Verfahren zum Schreiben auf einer Speichelplatte
公开(公告)号：EP1083549A2
公开(公告)日：2001-03-14
申请号：EP00307508.2
申请日：2000-08-31
Applicant: STMicroelectronics, Inc.
Inventor： Patti, Giuseppe , Alini, Roberto , DeNoyer, Gilles P.
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.
Abstract translation: 用于控制磁盘存储装置的写入头（101）的电路包括耦合到写入头的终端（101a）的上拉装置（104），用于通过终端有选择地向写入头提供电流， 并联连接的第一（106）和第二（107）电流吸收电路，每个耦合到写入头终端并选择性地激活以从写入头抽取电流。 控制电路（130）分别启动上拉装置和第一和第二电流吸收电路以反转通过写入头的电流的方向。 当电流接近期望的电流电平时，第二电流吸收电路被去激活，并且上拉装置立即被激活一段预定的时间。 写头电流的电流过冲和欠冲最小。
-
3.发明公开
公开(公告)号：EP1083550A3
公开(公告)日：2005-05-18
申请号：EP00307519.9
申请日：2000-08-31
Applicant: STMicroelectronics, Inc.
Inventor： Patti, Giuseppe , Alini, Roberto , Pakriswamy, Elango
Abstract: A circuit (102,103) for controlling the write head (101) of a magnetic disk storage device includes a pull-up device (104) for selectively providing a current to the write head and a current sink circuit (106) selectively activated to draw current from the write head. A bootstrap circuit (108) is coupled to the current sink circuit. When reversing the direction of current flow through the write head from a first direction to the write head to a second direction from the write head terminal, the bootstrap circuit and the current sink circuit are activated to rapidly draw current from the write head. When the current in the write head nears and/or slightly surpasses the desired destination level, the bootstrap circuit is deactivated.
-
4.发明公开Apparatus and method for reducing thermal interference in MR heads in disk drives 审中-公开装置和方法用于降低MR热干扰头用于盘驱动器
公开(公告)号：EP1003155A1
公开(公告)日：2000-05-24
申请号：EP99309211.3
申请日：1999-11-18
Applicant: STMicroelectronics, Inc.
Inventor： Patti, Giuseppe , Lee, Eugene C. , Alini, Roberto
CPC classification number: G11B5/012 , G11B2005/0016
Abstract: To reduce thermal interference in the read signal of a disk drive, a variable or programmable resistance is used to change the transfer function of a filter (112) in the read channel of the disk drive to filter the read signal. The filter has a first cut-off frequency related to the programmed resistance during normal operation of the disk drive. When thermal interference is detected in the read signal, the resistance is programmed to another value resulting in the filter having a second cut-off frequency. The resistance element is variable or programmable to different values resulting in one of a multitude of cut-off frequencies for the filter.
Abstract translation: 为了减少在磁盘驱动器的读信号的热干扰，可变的或可编程的电阻被用来改变在盘驱动器的读通道的过滤器（112）的传递函数来过滤的读取信号。 该过滤器具有磁盘驱动器的正常手术期间相关的编程电阻的第一截止频率。 当在所读取的信号中检测到热干扰，电阻被编程为anotherValue导致过滤器具有第二截止频率。 电阻元件是可变的或可编程的，以在截止频率为所述过滤器的多个中的一个所得到的不同的值。
-
公开(公告)号：EP1083549B1
公开(公告)日：2010-02-17
申请号：EP00307508.2
申请日：2000-08-31
Applicant: STMicroelectronics, Inc.
Inventor： Patti, Giuseppe , Alini, Roberto , DeNoyer, Gilles P.
-
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.
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.
-
-
-
-
-
Search Results
6
records
(took 0.019 seconds)
