中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

73 records (took 0.023 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE68920403T2

    公开(公告)日：1995-05-11

    申请号：DE68920403

    申请日：1989-10-25

    Applicant: SONY CORP

    Inventor： SEKO SATORU ,  KUNITO YOSHIYUKI ,  MUTO TAKAYASU ,  KAWABATA TOMOKI

    IPC: G11B5/55 ,  G11B5/596

    Abstract: A magnetic disc apparatus having at least one magnetic disc having a plurality of track groups thereon at different distances from the center of the disc each of which groups comprises plural data tracks having plural data sectors, each of the track groups having a different number of the data sectors therein in such a manner that outer track group has more data sectors, a transducer head for reading and writing data signals from and on the data tracks, an actuator for positioning the transducer head over a desired one of the data tracks, a position sensor for sensing the position of the transducer head relative to the magnetic disc, and for generating at least two periodic position signals each of which is out of phase with each other, and a controller for controlling the actuator according to the periodic position signals so that the transducer head is positioned over the desired one of the data tracks.

    4.
    发明专利
    未知

    公开(公告)号：DE68920403D1

    公开(公告)日：1995-02-16

    申请号：DE68920403

    申请日：1989-10-25

    Applicant: SONY CORP

    Inventor： SEKO SATORU ,  KUNITO YOSHIYUKI ,  MUTO TAKAYASU ,  KAWABATA TOMOKI

    IPC: G11B5/55 ,  G11B5/596

    Abstract: A magnetic disc apparatus having at least one magnetic disc having a plurality of track groups thereon at different distances from the center of the disc each of which groups comprises plural data tracks having plural data sectors, each of the track groups having a different number of the data sectors therein in such a manner that outer track group has more data sectors, a transducer head for reading and writing data signals from and on the data tracks, an actuator for positioning the transducer head over a desired one of the data tracks, a position sensor for sensing the position of the transducer head relative to the magnetic disc, and for generating at least two periodic position signals each of which is out of phase with each other, and a controller for controlling the actuator according to the periodic position signals so that the transducer head is positioned over the desired one of the data tracks.

    TRACKING ERROR CORRECTED MAGNETIC DISC APPARATUS
    5.
    发明专利
    TRACKING ERROR CORRECTED MAGNETIC DISC APPARATUS 未知

    公开(公告)号：CA1333938C

    公开(公告)日：1995-01-10

    申请号：CA545351

    申请日：1987-08-26

    Applicant: SONY CORP

    Inventor： HOSHIMI SUSUMU ,  MUTO TAKAYASU

    IPC: G11B5/596 ,  G11B21/10

    Abstract: A magnetic disc apparatus wherein off-track quantities are stored with regard to reference servo tracks formed circularly in divided data areas on a magnetic disc and, at the time to displace a magnetic head, the head is shifted an extent of the stored offtrack quantity after being once positioned by a head position detector. Gradients of the off-track quantities to tracks at individual temperatures in the apparatus are previously stored and, after the actual temperature is detected by means of a temperature sensor, the off-track quantity relative to the reference servo track is corrected in accordance with the gradient of the offtrack quantity to the relevant track at the detected temperature, whereby just tracking is achieved. The magnetic head can be positioned exactly with respect to a desired data track while the head displacement time is shortened. Furthermore, data can be written in the entire length of each circular data track to enhance the efficiency of utilizing the magnetic disc, and high-precision tracking is attainable with the off-track quantity reduced to zero in any data track.

    7.
    发明专利
    未知

    公开(公告)号：FR2766938B1

    公开(公告)日：2004-09-03

    申请号：FR9807744

    申请日：1998-06-19

    Applicant: SONY CORP

    Inventor： MUTO TAKAYASU

    IPC: G06F13/38 ,  H04L12/413 ,  H04L12/40 ,  H04L12/64 ,  H04L69/14 ,  G06F13/42 ,  H04L29/06

    Abstract: To provide a serial interface circuit capable of converting a large volume of data into packets based on a predetermined standard for transmission and reception and capable of performing smooth transmission and reception processing, which comprises a transaction layer circuit serving as a data processing circuit to which a storage device is connected, which reads data of the storage device, adds a self-designating transaction label, and transmits the data as a transmission asynchronous packet to a serial interface bus BS and, when transferring data of another node to the storage device, generates a request packet to which it had added a self-designating label and transmits the same to the serial interface bus BS, receives a response packet for this request packet from the another node, takes out a data portion from the response packet, and transfers this to the storage device.

Patent Agency Ranking