公开(公告)号：JPH05189706A

公开(公告)日：1993-07-30

申请号：JP2437492

申请日：1992-01-16

Applicant: SONY CORP

Inventor： OMORI TAKASHI

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To generate a strong magnetic field although the circuit configuration is simple and miniature by amplifying a driving current for a magnetic field generating coil with a buffer capacitor. CONSTITUTION:The magnetic head driving circuit is equipped with FET1 and FET2 to be in push-pull operation by a recording signal inputted to an input terminal S, one pair of diodes D1 and D2 connected in series between these switching elements and the magnetic field generating coil L connected via a coupling capacitor Cc between these diodes D1 and D2. The buffer capacitor CB is connected in AC-like parallel to this magnetic field generating coil L.

公开(公告)号：JPH04176038A

公开(公告)日：1992-06-23

申请号：JP31261890

申请日：1990-11-20

Applicant: SONY CORP

Inventor： YOSHIDA TADAO ,  OMORI TAKASHI ,  FUJISAWA HIROTOSHI

IPC: G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To stabilize recording operation, to improve recording characteristics, to prevent the effect of the adhesion of dust and to obviate the abrasion of a magnetic head by forming a laser-beam incidence plane, to which an optical head is faced oppositely, optically smoothly and forming an active layer having excellent smoothness to another opposed surface. CONSTITUTION:A laser-beam incident side surface 1a as one surface oppositely faced to an optical head of a transparent substrate 1 is formed optically smoothly, and a signal recording layer 2 formed to a surface 1b on the reverse side oppositely faced to the laser-beam incident side surface 1a is composed of an amorphous ferromagnetic layer having the axis of easy magnetization in the direction vertical to a film surface. A protective film layer 3 formed onto the signal recording layer 2 protects the recording layer 2 from a shock from the outside and the contact of foreign matters, and a smooth layer 5 having excellent smoothness is shaped onto the protective film layer 3 through an adhesive layer 4. When recording is conducted by a contact type magnetic head in a magneto-optical disk, the smooth layer 5 makes the magnetic head follow up to the surface swing of the magneto-optical disk. Accordingly, recording operation of stabilized, recording characteristics are improved, an effect by dust is prevented and the abrasion of the magnetic head is obviated.

公开(公告)号：JPS6448207A

公开(公告)日：1989-02-22

申请号：JP20409587

申请日：1987-08-19

Applicant: SONY CORP

Inventor： OMORI TAKASHI ,  FUJIIE KAZUHIKO

IPC: G11B5/09 ,  G11B11/10 ,  G11B11/105 ,  G11B19/02

Abstract: PURPOSE:To sufficiently shorten the rising time of the current flowing to the coil of a magnetic head and to reduce electric power consumption by selectively connecting two power supplies of different potentials to both ends of the coil. CONSTITUTION:This driving circuit is provided with the two power supplies of different potentials for supplying currents to the coil 1 of the magnetic head which executes magneto-optical recording and switching elements 2, 4, 5, 8-10 which respectively selectively connect the power supplies 3, 6. The circuit is so constituted as to selectively connect the power supplies 3, 6 of different potentials to both ends of the coil 1 by operating the switching elements 2, 4, 5, 8-10 in accordance with recording signals in order to apply the potential difference larger than the potential difference at the time of generation of a stationary magnetic field to both ends of the coil 1 at the time of magnetic field inversion. The rising time of the current flowing in the coil 1 is thereby sufficiently shortened and the electric power consumption is reduced and, therefore, the magnetic head is satisfactorily driven without connecting a resistor for waveform rectification, etc., in parallel to the coil 1.

公开(公告)号：JPS63244402A

公开(公告)日：1988-10-11

申请号：JP7893187

申请日：1987-03-31

Applicant: SONY CORP

Inventor： OMORI TAKASHI

IPC: G11B5/02 ,  G11B5/09 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To reduce power consumption without losing the response characteristic of a drive current by retarding a change point of a drive current with respect to the switching point of an original drive signal by a prescribed time and turning on a switching element in advance forming a drive current path within a prescribed time. CONSTITUTION:A timing generating circuit 2 is provided between an input terminal 1 and a control terminal for four switch circuits 15, 16, 25, 26 and the four switch circuits 15, 16, 25, 26 are controlled respectively by control signals S2-S5 formed by the timing generating circuit 2. A couple of switch circuits 15, 26 are switched from ON to OFF, the switch circuit 25 is turned on in preceding over the timing when the switch circuit 16 is turned on by a prescribed time. When a couple of switch circuits 16, 25 are switched from ON to OFF, the switch 15 is turned on in preceding over the timing when the switch circuit 26 is turned on by a prescribed time. Thus, the power consumption is reduced without losing the response characteristic.

公开(公告)号：JP2006294098A

公开(公告)日：2006-10-26

申请号：JP2005111008

申请日：2005-04-07

Applicant: Sony Corp ,  ソニー株式会社

Inventor： OMORI TAKASHI ,  FUJINAWA AKIRA

IPC: G11B20/14

Abstract: PROBLEM TO BE SOLVED: To provide a signal processing device and a reproduction device, ensuring stable reproduction even if a disk-like recording medium has an increased recording density. SOLUTION: A gradient of a reproduction signal at a polarity changing point is detected, and when it is a predetermined gradient or less, control is performed such that a detected phase error is canceled. When signal amplitude is reduced by increase in recording density and therefore a signal is subjected to intersymbol interference, a polarity changing point of a reproduction signal at the relevant portion is significantly shifted from a polarity changing point to be originally obtained, thereby a phase error increases and consequently a reference clock may be hard to be normally generated. Since a gradient of the reproduction signal is reduced in such a portion where the signal amplitude of the reproduction signal is reduced and a signal is subjected to intersymbol interference, when the phase error, which is detected in the portion where the gradient of the reproduction signal is a predetermined gradient or less, is canceled as above, adverse influence of a large phase error detected in the portion on reference clock generation operation is eliminated, leading to stable reproduction operation. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了提供信号处理装置和再现装置，即使盘状记录介质具有增加的记录密度，确保稳定再现。 解决方案：检测极性变化点的再现信号的梯度，并且当其为预定斜率或更小时，执行控制以使得检测到的相位误差被消除。 当通过增加记录密度降低信号幅度，因此信号遭受码间干扰时，相关部分的再现信号的极性变化点从原来获得的极性变化点显着偏移，从而相位误差增大 因此参考时钟可能难以正常地产生。 由于在再现信号的信号幅度减小并且信号遭受码间干扰的部分中再现信号的梯度减小，所以当在再现信号的梯度部分中检测到的相位误差 是预定的梯度或更小，如上所述被消除，消除了在该部分中检测到的大的相位误差对参考时钟产生操作的不利影响，导致稳定的再现操作。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006260771A

公开(公告)日：2006-09-28

申请号：JP2006179464

申请日：2006-06-29

Applicant: Sony Corp ,  ソニー株式会社

Inventor： OMORI TAKASHI

IPC: G11B20/12 ,  G11B20/10 ,  G11B27/00

Abstract: PROBLEM TO BE SOLVED: To provide a recording apparatus corresponding to a recording medium suitable when a recording and playback system for music use is extended for data recording and reproduction. SOLUTION: In the recording apparatus corresponding to a recording medium wherein one recording and reproducing operation unit is formed by a prescribed number of sectors and an allocation table and a directory for managing recording and reproduction of data are provided as sectors for management information, recording in the allocation table and the directory is performed using the sectors in the recording and reproducing operation unit as long as a free sector exists in the prescribed recording and reproducing operation unit. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种对应于当用于音乐使用的记录和播放系统被扩展用于数据记录和再现时适合的记录介质的记录装置。 解决方案：在对应于其中一个记录和再现操作单元由规定数量的扇区形成的记录设备和用于管理数据的记录和再现的分配表和目录被提供作为管理信息的扇区 只要在规定的记录和再现操作单元中存在空闲扇区，则使用记录和再现操作单元中的扇区来执行在分配表中的记录和目录。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006079787A

公开(公告)日：2006-03-23

申请号：JP2004265629

申请日：2004-09-13

Applicant: Sony Corp ,  ソニー株式会社

Inventor： OMORI TAKASHI

IPC: G11B20/14 ,  G11B20/18

Abstract: PROBLEM TO BE SOLVED: To realize a signal processor and a signal reproducing device capable of coping with higher recording density and stably performing an operation by eliminating inter-symbol interference and influence of adjacent tracks. SOLUTION: The signal processor is provided with a reference clock generating means of generating a reference clock from a reproduced signal, a phase detecting means of generating a phase detection signal by detecting the phase difference between the reference clock and reproduced signal, a clock correcting means of correcting the phase of the reference clock on the basis of the phase detection signal, and a signal correcting means of adding a correction pulse having a phase in such a direction that the detected phase error is canceled to a change point after the change point where the phase error of the phase detection signal is detected, when the detected phase error exceeds a prescribed phase error reference value. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了实现能够通过消除符号间干扰和相邻轨道的影响来应对更高记录密度和稳定地执行操作的信号处理器和信号再现装置。 解决方案：信号处理器设置有从再现信号产生参考时钟的参考时钟产生装置，相位检测装置，通过检测参考时钟和再现信号之间的相位差产生相位检测信号，a 时钟校正装置，用于根据相位检测信号校正参考时钟的相位;以及信号校正装置，将具有相位的校正脉冲与检测到的相位误差抵消的方向相加， 当检测到的相位误差超过规定的相位误差参考值时，检测相位检测信号的相位误差的变化点。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004095166A

公开(公告)日：2004-03-25

申请号：JP2003338491

申请日：2003-09-29

Applicant: Sony Corp ,  ソニー株式会社

Inventor： OMORI TAKASHI

IPC: G11B20/12 ,  G11B20/10

Abstract: PROBLEM TO BE SOLVED: To provide a magneto-optic disk as a recording medium on which data is recorded, which is used for both audio data and general data to be able to record/reproduce data, is suitable for miniaturization and power saving and further prevents the use of a disk obtained by an illegal copy. SOLUTION: First management information in a management area following a pit area on the magneto-optic disk, which records or updates an audio data or general data file and manages a reproducing operation of the audio data or general data file, and second management information for a general data file at a position near the innermost circumferential side of a general data file recording area are provided, track management is performed with the first management information, and data track management is performed with the second management information. In addition, third management information for a general data file that is not managed as a reproduction object with the first and second management information is provided, recording/reproducing using the third management information is performed, and copy guard data is recorded in the third management information. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2000048469A

公开(公告)日：2000-02-18

申请号：JP22012798

申请日：1998-08-04

Applicant: SONY CORP

Inventor： OMORI TAKASHI ,  TADOKORO EIJI

IPC: G11B27/10 ,  G11B19/02

Abstract: PROBLEM TO BE SOLVED: To reduce power consumption and mechanical operation noises by eliminating an unnecessary medium replacing operation during recording medium retrieval. SOLUTION: During initialization, the head data of disks 1a to 1e are stored in the head memory area of a RAM 12, after the initialization, a disk replacing request is made to the disk 1b in the reproducing state of the disk 1a, and when a disk replacing request is made to the disk 1b within 3 seconds, a system controller 11 reads the head data of the disk 1b from the RAM and outputs the same based on the disk replacing request to the disk 1b, but a disk replacing operation is not started. Based on a disk replacing request made to the disk 1c, the head data of the disk 1c is outputted from the RAM, but a replacing operation is not started, either, at this time. If no replacing requests are made within 3 seconds after the replacing request made to the disk 1c, a replacing operation is started, the disk 1c is loaded in a player box 32, data after the head data are read and written in the main memory area of the RAM, and reading is performed after all the data are read.

公开(公告)号：JPH11339449A

公开(公告)日：1999-12-10

申请号：JP14570598

申请日：1998-05-27

Applicant: SONY CORP

Inventor： OMORI TAKASHI ,  TADOKORO EIJI

IPC: G11B17/22 ,  G11B19/02 ,  G11B27/10

Abstract: PROBLEM TO BE SOLVED: To prevent the music from being played back immediately from its introduction, and the sound from being interrupted. When the user selects a music in a minidisc(MD) changer system, etc. SOLUTION: In DRAM 50, introduction data Da1 of a first music in a first MD, introduction data Db1 of a first music in a second MD,..., are stored. When the user selects the first music of the second MD, the apparatus reads the instruction data Db1 of the first music in the second MD stored in DRAM 50, an ATRAC decoder expands to play back the introduction of the first music in the second MD while it chucks the second MD with a spindle motor to select the first music and writes compressed data following its music's instruction data Db1 in DRAM 50. When the apparatus has read the introduction data Db1 stored in DRAM 50 to the last therefrom, it reads compressed data following the first music's introduction data Db1 from DRAM 50 and the ATRAC decoder expands it.