公开(公告)号：US5701213A

公开(公告)日：1997-12-23

申请号：US707655

申请日：1996-09-12

Applicant: Scott Warren Cameron ,  Axel Alegre de La Soujeole

Inventor： Scott Warren Cameron ,  Axel Alegre de La Soujeole

IPC: G11B5/09 ,  G11B5/00 ,  G11B5/02 ,  G11B5/39 ,  G11B5/40 ,  G11B19/04 ,  H03F3/45 ,  G11B5/03

CPC classification number: H03F3/45479 ,  G11B5/02 ,  G11B5/40 ,  G11B19/04 ,  G11B2005/0018 ,  H03F2200/372

Abstract: An innovative disk drive system which provides a regulated bias current to a magnetoresistive read head, and controls the voltage of the magnetoresistive read head terminals so that the CENTER of the resistor is at ground. This halves the peak magnitude of the head-to-disk voltage.

Abstract translation: 一种创新的磁盘驱动器系统，其向磁阻读取头提供调节的偏置电流，并且控制磁阻读头终端的电压，使得电阻器的CENTER处于地电位。 这将磁头电压峰值幅度减半。

公开(公告)号：US5696460A

公开(公告)日：1997-12-09

申请号：US700765

申请日：1996-08-12

Applicant: Scott Warren Cameron

Inventor： Scott Warren Cameron

IPC: G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  H03F3/45 ,  H03K17/66 ,  H03B1/00

CPC classification number: G11B5/022 ,  G11B5/012 ,  G11B5/02 ,  H03K17/662 ,  G11B2005/0013 ,  G11B2005/0016

Abstract: An innovative circuit for driving the write head. All of the driving transistors are NPN, and are prevented from saturation. This is achieved by shifting and scaling down the differential drive applied to the pull-up transistors, to drive the pull-down transistors with levels such that the pull-down transistors cannot reach saturation. This provides a very simple circuit in which all four of the drive transistors are NPN, and all are kept out of saturation. Moreover, the peak write current applied to the head is precisely limited.

Abstract translation: 用于驱动写入头的创新电路。 所有的驱动晶体管均为NPN，防止饱和。 这是通过移位和缩小施加到上拉晶体管的差分驱动来实现的，以便使下拉晶体管不能达到饱和的水平驱动下拉晶体管。 这提供了一个非常简单的电路，其中所有四个驱动晶体管都是NPN，并且全部都保持不饱和。 此外，施加到头部的峰值写入电流被精确地限制。

公开(公告)号：US06172548B2

公开(公告)日：2001-01-09

申请号：US08366561

申请日：1994-12-30

Applicant: Scott Warren Cameron ,  Axel Alegre de La Soujeole

Inventor： Scott Warren Cameron ,  Axel Alegre de La Soujeole

IPC: H03L500

CPC classification number: G11B5/02 ,  G11B2005/0016 ,  G11B2005/0018 ,  H03F3/72 ,  H03F2200/372

Abstract: The present application discloses an innovative improved circuit, in which the long transient at write-to-read transitions is avoided by using a shorting switch to short the inputs of the first amplifier stage together when the read amplifier is activated. This speeds up write-to-read transition. Moreover, since read mode can now be entered more quickly after a power-down condition, this circuit also permits the use of other power-saving tricks to idle the read amplifier momentarily.

Abstract translation: 本申请公开了一种创新的改进电路，其中在读取放大器被激活时，通过使用短路开关将第一放大器级的输入短接在一起，避免了写入 - 读取转换期间的长瞬态​​。 这样可以加快写入 - 读取的转换。 此外，由于读取模式现在可以在掉电状态之后更快速地输入，所以该电路还允许使用其他省电技巧来暂时怠速读取放大器。

公开(公告)号：US5770968A

公开(公告)日：1998-06-23

申请号：US366790

申请日：1994-12-30

Applicant: Scott Warren Cameron

Inventor： Scott Warren Cameron

IPC: G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/39 ,  G11B5/40 ,  G11B19/04 ,  H03F3/45

CPC classification number: G11B5/02 ,  H03F3/45479 ,  G11B19/04 ,  G11B2005/0016 ,  G11B2005/0018 ,  G11B5/012 ,  G11B5/40 ,  H03F2200/372

Abstract: An innovative differential amplifier circuit, which can control the midpoint potential of a load which does not itself have any midpoint connection. This is achieved by using a proxy load element in parallel with the primary load. The proxy load is of much higher impedance value than the primary load, and does have a center tap. The potential of the center tap of the mirrored load is used for a feedback connection to a control loop which regulates the output to both the primary load and the proxy load.

Abstract translation: 一种创新的差分放大器电路，可以控制本身不具有任何中点连接的负载的中点电位。 这通过使用与主负载并行的代理负载元件来实现。 代理负载的阻抗值比主负载高得多，并且具有中心抽头。 镜像负载的中心抽头的潜力用于与控制回路的反馈连接，该控制回路将输出调节到主负载和代理负载。