-
公开(公告)号：MY121426A
公开(公告)日：2006-01-28
申请号：MYPI9904435
申请日：1999-10-14
Applicant: SONY CORP
Inventor： WAKUDA HIROSHI , MITANI AKIRA
Abstract: A ZONE WHERE HEAD IS POSITIONED IS DETERMINED IN A TRACK TO BE ONE OF ZONES 1 TO 4 ACCORDING TO A COMBINATION OF THE POLARITIES OF PHASE-A AND PHASE-B DETECTION OUTPUTS HAVING DIFFERENT PHASES, AND THE POSITIONAL DEVIATION OF THE HEAD FROM THE CURRENT POSITION TO THE CENTER OF THE TARGET TRACK IS OBTAINED FROM THE PHASE-B DETECTION OUTPUT IN THE ZONE. THE PHASE-B DETECTION OUTPUT ID PROVIDED WITH A DEAD ZONE (25) CORRESPONDING TO A RANGE WHERE BOTH DETECTION OUTPUTS HAVE A PHASE-DIFFERENCE ERROR. THEREFORE, EVEN IF THE PHASE DIFFERENCE HAS AN ERROR, THE POSITIONAL DEVIATION OF THE HEAD IS ACCURATELY CALCULATED.
-
公开(公告)号：DE69910711D1
公开(公告)日：2003-10-02
申请号：DE69910711
申请日：1999-10-12
Applicant: SONY CORP
Inventor： WAKUDA HIROSHI , MITANI AKIRA
Abstract: When a seek pulse is sent from the host computer to a disk apparatus in which a head is continuously moved by a voice-coil motor, to return the head to a zero position, even if the head has actually not been returned to the zero position, the disk apparatus generates an acknowledge pulse and sends it to the host computer within a predetermined period of time after the seek pulse is sent. Since a reference-position detection pulse is switched when the head is positioned between the tracks having track numbers of 2 and 1, a track-number count is checked or corrected with this pulse being used as a reference.
-
公开(公告)号：DE69910711T2
公开(公告)日：2004-06-17
申请号：DE69910711
申请日：1999-10-12
Applicant: SONY CORP
Inventor： WAKUDA HIROSHI , MITANI AKIRA
Abstract: When a seek pulse is sent from the host computer to a disk apparatus in which a head is continuously moved by a voice-coil motor, to return the head to a zero position, even if the head has actually not been returned to the zero position, the disk apparatus generates an acknowledge pulse and sends it to the host computer within a predetermined period of time after the seek pulse is sent. Since a reference-position detection pulse is switched when the head is positioned between the tracks having track numbers of 2 and 1, a track-number count is checked or corrected with this pulse being used as a reference.
-
公开(公告)号：MY121393A
公开(公告)日：2006-01-28
申请号：MYPI9904447
申请日：1999-10-14
Applicant: SONY CORP
Inventor： WAKUDA HIROSHI , MITANI AKIRA
Abstract: WHEN A SEEK PULSE IS SENT FROM THE HOST COMPUTER TO A DISK APPARATUS IN WHICH A HEAD (H1) IS CONTINUOUSLY MOVED BY A VOICE-COIL MOTOR, TO RETURN THE HEAD (H1) TO A ZERO POSITION, EVEN IF THE HEAD (H1) HAS ACTUALLY NOT BEEN RETURNED TO THE ZERO POSITION, THE DISK APPARATUS GENERATED AN ACKNOWLEDGE PULSE AND SENDS IT TO THE HOST COMPUTER WITHIN A PREDETERMINED PERIOD OF TIME AFTER THE SEEK PULSE IS SENT. SINCE A REFERENCE-POSITION DETECTION PULSE IS SWITCHED WHEN THE HEAD (H1) IS POSITIONED BETWEEN THE TRACKS HAVING TRACK NUMBERS OF 2 AND 1, A TRACK-NUMBER COUNT IS CHECKED OR CORRECTED WITH THIS PULSE BEING USED AS A REFERENCE.
-
公开(公告)号：JPH11232762A
公开(公告)日：1999-08-27
申请号：JP3181598
申请日：1998-02-13
Applicant: SONY CORP
Inventor： SHIRANE KYOICHI , MITANI AKIRA
Abstract: PROBLEM TO BE SOLVED: To provide a recording/reproducing device surely performing track transfer even when continuous track transfer is performed. SOLUTION: The recording/reproducing device 1 counts up a count value whenever a track transfer request pulse is supplied by a track transfer control function of a control part 9, and counts down the count value whenever the magnetic head is track transferred by one data track by a magnetic head drive part 6 so as to obtain present count value and track transfers the magnetic head at a speed based on the obtained present count value.
-
Patent Agency Ranking
公开(公告)号：JPS58144959A
公开(公告)日：1983-08-29
申请号：JP2792882
申请日：1982-02-23
Applicant: SONY CORP
Inventor： OOTSUKI TADASHI , MITANI AKIRA , YAMAGUCHI TAKAO
IPC: G06F13/28 , G06F13/16 , G06F15/16 , G06F15/177
Abstract: PURPOSE:To perform more controls quickly, by accessing freely a memory, which is connected to a CPU, directly from an external device wihtout setting the CPU to the holding state. CONSTITUTION:A memory map is allocated by an address decoder 8, and an ROM 3 is used as a program area, and an RAM 1 is used as a data area. The data transfer between an input/output port 6 and the RAM 1 is controlled by an I/O data buffer 9. Addressing of the RAM 1 due to an address counter 7 is controlled by an I/O address buffer 10. A bus control circuit 11 is connected to a CPU 2 through a control bus. The bus control circuit 11 controls buffers 4, 5, 9 and 10 to make it possible to access the RAM 1 from the input/output port 6 at the timing of a machine cycle M1 and to access the RAM 1 from the CPU 2 at other timings.
-
公开(公告)号：JP2000123500A
公开(公告)日：2000-04-28
申请号：JP29241898
申请日：1998-10-14
Applicant: ALPS ELECTRIC CO LTD , SONY CORP
Inventor： WAKUTA HIROSHI , MITANI AKIRA
IPC: G11B21/08
Abstract: PROBLEM TO BE SOLVED: To enable moving quickly a head to the final target track center with respect to a disk device in which a head is continuously moved by a VCM (voice coil motor) and the like, because the transfer speed of the head moving by every seek command pulse is delayed when are track gives the seek command pulse corresponding to one pulse, and as a result, it takes time until it is on-tracked on the trackcenter of final target. SOLUTION: When a seek command pulse is given, a head is moved by one track, but when the next seek command pulse is given before a head reaches an adjacent track center, distance of one track is added to distance to an adjacent track center, and a head is accelerated with speed in accordance with this added distance. Thereby, a head can be moved quickly to the target track center.
-
公开(公告)号：JPH11232808A
公开(公告)日：1999-08-27
申请号：JP3181498
申请日：1998-02-13
Applicant: SONY CORP
Inventor： MITANI AKIRA
IPC: G11B21/08
Abstract: PROBLEM TO BE SOLVED: To provide a recording/reproducing device capable of accurately moving a recording/reproducing head on plural data tracks formed on a record medium, with respect to the device for recording/reproducing the information signal by the recording/reproducing head with respect to the record medium having no positional information. SOLUTION: A control part 9 of the recording/reproducing device is provided with the track feeding control function for moving the magnetic head 10 to a prescribed data track by controlling a magnetic head driving part 6 in accordance with a signal requesting the track feeding, the position detecting function for detecting the position of the magnetic head 10 between adjacent two data tracks, and the moving speed control function for controlling the moving speed of the magnetic head 10 in accordance with the speed information corresponding to the position detected by the position detecting mechanism.
-
公开(公告)号：JPH11203806A
公开(公告)日：1999-07-30
申请号：JP30584198
申请日：1998-10-27
Applicant: SONY CORP
Inventor： MITANI AKIRA
Abstract: PROBLEM TO BE SOLVED: To provide a recording/reproducing device and a recording/reproducing method having a function making a head perform a tracking on data tracks formed on a record medium having a low-order specification and a high-oder specification. SOLUTION: A control part 10 successively stores maximum values and minimum values of signal levels of roughly sine wave shaped sine wave signals becoming one cycle every track which are to be generated by an optical encoder while moving a magnetic head in a direction vertical to plural tracks with a head driving part 7 in a storage part 11 as table information at a calibration time and at a tracking time, the part 10 reads out the maximim value and the minimum value corresponding to a target track from the storage part 11 to generate target sine wave level information based on the readout maximum value and the minimum value and the part makes the magnetic head perform a tracking on the target track by a low-order tracking circuit 8b based on the generated target sine wave level information.
-
公开(公告)号：JP2001268494A
公开(公告)日：2001-09-28
申请号：JP2000077812
申请日：2000-03-15
Applicant: SONY CORP
Inventor： MAMIYA TOSHIO , YADA HIROAKI , YAMASHITA KEITARO , MITANI AKIRA
IPC: H04N5/781 , G11B5/09 , G11B5/596 , G11B20/10 , G11B27/30 , G11B33/06 , H04N5/765 , H04N5/77 , H04N9/804 , H04N9/808
Abstract: PROBLEM TO BE SOLVED: To record and carry almost all information owned by an individual by utilizing a removable hard disk device mountable on portable equipment especially. SOLUTION: This hard disk device is held by video equipment 2, 3, 4 and 5 and video data or the like are recorded and reproduced at the data transfer rate of 30 [Mbps] or higher. The capacity of 2 [GB] or more is secured by a hard disk whose diameter is 1.8 inch or less by a so-called sample servo.
-
-
-
-
-
-
-
-
-
Search Results
22
records
(took 0.021 seconds)
