公开(公告)号：DE69531931T2

公开(公告)日：2004-07-29

申请号：DE69531931

申请日：1995-12-22

Applicant: ST MICROELECTRONICS INC

Inventor： CAMERON SCOTT W ,  ALEGRE DE LA SOUJEOLE AXEL

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

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.

公开(公告)号：DE69529968T2

公开(公告)日：2004-02-12

申请号：DE69529968

申请日：1995-12-22

Applicant: ST MICROELECTRONICS INC

Inventor： CAMERON SCOTT W ,  ALEGRE DE LA SOUJEOLE AXEL

IPC: G11B5/09 ,  G11B5/00 ,  G11B5/02 ,  G11B5/39 ,  H03F3/72 ,  H03F1/30

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 (M1) to short the inputs of the first amplifier stage (A1) 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.

公开(公告)号：DE69531931D1

公开(公告)日：2003-11-20

申请号：DE69531931

申请日：1995-12-22

Applicant: ST MICROELECTRONICS INC

Inventor： CAMERON SCOTT W ,  ALEGRE DE LA SOUJEOLE AXEL

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

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.

公开(公告)号：DE69529968D1

公开(公告)日：2003-04-24

申请号：DE69529968

申请日：1995-12-22

Applicant: ST MICROELECTRONICS INC

Inventor： CAMERON SCOTT W ,  ALEGRE DE LA SOUJEOLE AXEL

IPC: G11B5/09 ,  G11B5/00 ,  G11B5/02 ,  G11B5/39 ,  H03F3/72 ,  H03F1/30

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 (M1) to short the inputs of the first amplifier stage (A1) 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.