公开(公告)号：DE10011056A1

公开(公告)日：2000-09-28

申请号：DE10011056

申请日：2000-03-07

Applicant: IBM

Inventor： KLAASSEN KLAAS BEREND ,  PEPPEN JACOBUS CORNELIS LEONAR

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/39 ,  H03F1/42 ,  H03F3/45 ,  H03H11/28

Abstract: The sense amplifier (302) includes a gain stage with an input which can be coupled to a connection having a characteristic impedance, the gain stage having a certain impedance. An active termination is connected to the input of the gain stage. The input impedance of the sense amplifier is formed from the combination of the impedance of the gain stage and that of the active termination. The input impedance of the sense amplifier corresponds to the characteristic impedance of the connection. The active termination may provide positive feedback from the gain stage to the input of the gain stage. Independent claims are included for a channel front end and for a magnetic storage system.

公开(公告)号：BR8903838A

公开(公告)日：1990-03-20

申请号：BR8903838

申请日：1989-07-31

Applicant: IBM

Inventor： JOVE STEPHEN ALAN ,  KLAASEN KLAAS BEREND ,  PEPPEN JACOBUS CORNELIS LEONAR

IPC: G06F11/00 ,  G11B20/18 ,  G11B20/22 ,  G11B20/24 ,  H03K5/00 ,  H03K5/08 ,  H04B1/10

公开(公告)号：AU617840B2

公开(公告)日：1991-12-05

申请号：AU3915889

申请日：1989-08-01

Applicant: IBM

Inventor： JOVE STEPHEN ALAN ,  KLAASEN KLAAS BEREND ,  PEPPEN JACOBUS CORNELIS LEONAR

IPC: G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/40 ,  G11B19/04 ,  G11B20/00 ,  G11B20/22 ,  G11B33/10 ,  G11B20/24 ,  H04B15/00

Abstract: A method and circuitry are disclosed for suppressing additive transient disturbances in a data channel; e.g., due to thermal transients caused by an MR transducer contacting a moving storage surface. Positive and negative envelope detectors (11, 12) each have their inputs connected to the channel, and provide respective outputs which are summed (13) and contain an envelope component and a residue component. A buffer (14) interconnects the detectors to allow both detectors (11, 12) to follow rapid positive excursions of the data channel signal. A nonlinear signal-adaptive filter (15) is connected to the summed output to further reduce the residue component. The data channel signal (or preferably the output from a delay means connected to the channel) is summed with the output from the filter. The relative amplitudes of these two outputs is set such that the resulting summed output signal is free of additive disturbances.

公开(公告)号：DE10011056B4

公开(公告)日：2005-03-24

申请号：DE10011056

申请日：2000-03-07

Applicant: IBM

Inventor： KLAASSEN KLAAS BEREND ,  PEPPEN JACOBUS CORNELIS LEONAR

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/39 ,  H03F1/42 ,  H03F3/45 ,  H03H11/28

Abstract: The sense amplifier (302) includes a gain stage with an input which can be coupled to a connection having a characteristic impedance, the gain stage having a certain impedance. An active termination is connected to the input of the gain stage. The input impedance of the sense amplifier is formed from the combination of the impedance of the gain stage and that of the active termination. The input impedance of the sense amplifier corresponds to the characteristic impedance of the connection. The active termination may provide positive feedback from the gain stage to the input of the gain stage. Independent claims are included for a channel front end and for a magnetic storage system.