公开(公告)号：EP1643496A3

公开(公告)日：2007-08-15

申请号：EP05108535.5

申请日：2005-09-16

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Kuroda, Kazuto ,  Higashiyama, Yasushi ,  Sato, Hiroharu

IPC分类号： G11B7/09 ,  G11B7/005

CPC分类号： G11B7/005 ,  G11B7/0906 ,  G11B7/0941 ,  G11B20/22

摘要： An optical disk apparatus of the invention includes an optical pickup (110) which irradiates an optical disk with a laser beam, a light-reception unit including a first light-reception element and a second light-reception element, the light-reception unit receiving the laser beam reflected from the optical disk to provide a first photodetection signal and a second photodetection signal corresponding to the reflected laser beam, measuring units (400, 500) which receive the first and second photodetection signals from the optical pickup to measure propagation delay time difference between the first and second photodetection signals, a delay unit (600) which delays the first and second photodetection signals based on the signal propagation delay time difference such that delay times of the first and second photodetection signals are equalized to each other, and a signal processing circuit (114) which processes the first and second photodetection signals delayed by the delay unit, and provides the processed signals.

公开(公告)号：EP1746588A3

公开(公告)日：2007-11-28

申请号：EP06117045.2

申请日：2006-07-12

申请人： Kabushiki Kaisha Toshiba

发明人： Higashiyama, Yasushi ,  Aoki, Masahiro

IPC分类号： G11B7/13

CPC分类号： G11B7/13 ,  G11B7/005 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/0956 ,  G11B7/131

摘要： A light receiving element circuit (1) is an integrated circuit configured by a light receiving element which photoelectrically converts an optical signal having an information signal, and amplifier circuits (U1 to U4) which amplify the photoelectrically converted electric signal and output the signal. The light receiving element circuit (1) comprises a reference voltage generating circuit (39) which generates a reference voltage (Vref) of the amplifier circuits (U1 to U4), a reference voltage output terminal (40) which outputs the reference voltage (Vref), a reference voltage input terminal (41) which inputs a reference voltage from the outside, a (SW1) which switches the reference voltage (Vref) from the reference voltage generating circuit (39) and the reference voltage inputted from the reference voltage input terminal, and a reference voltage switch terminal (42) which controls the switch (SM1).

公开(公告)号：EP0061194B1

公开(公告)日：1988-02-03

申请号：EP82102420.5

申请日：1982-03-23

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Higashiyama, Yasushi ,  Chiba, Shu ,  Sawazaki, Norikazu

IPC分类号： G11B5/008 ,  G11B7/08

CPC分类号： G11B5/56 ,  G11B5/0086 ,  G11B5/86 ,  G11B7/0031

公开(公告)号：EP0061194A2

公开(公告)日：1982-09-29

申请号：EP82102420.5

申请日：1982-03-23

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Higashiyama, Yasushi ,  Chiba, Shu ,  Sawazaki, Norikazu

IPC分类号： G11B5/008 ,  G11B7/08

CPC分类号： G11B5/56 ,  G11B5/0086 ,  G11B5/86 ,  G11B7/0031

摘要： An optical recording device for forming recording tracks of an indented pattern on a magnetic recording tape comprises a rotary drum (21) which has at least two windows (38, 39), the magnetic recording tape (11) being driven obliquely on the windows along an outer surface of the drum, and an optical system (32), disposed inside the rotary drum, for converting a modulated laser beam (30) incident on the optical system into two slit beams, major axes of sections of which form a predetermined angle and for emitting the slit beams on the magnetic recording tape through the windows, whereby the recording tracks of the indented pattern in correspondence with the signal are formed obliquely on the magnetic recording tape with respect to a longitudinal direction of the magnetic recording tape by the slit beams so as to form different azimuths between adjacent recording tracks.

公开(公告)号：EP1643496A2

公开(公告)日：2006-04-05

申请号：EP05108535.5

申请日：2005-09-16

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Kuroda, Kazuto ,  Higashiyama, Yasushi ,  Sato, Hiroharu

IPC分类号： G11B7/09

CPC分类号： G11B7/005 ,  G11B7/0906 ,  G11B7/0941 ,  G11B20/22

摘要： An optical disk apparatus of the invention includes an optical pickup (110) which irradiates an optical disk with a laser beam, a light-reception unit including a first light-reception element and a second light-reception element, the light-reception unit receiving the laser beam reflected from the optical disk to provide a first photodetection signal and a second photodetection signal corresponding to the reflected laser beam, measuring units (400, 500) which receive the first and second photodetection signals from the optical pickup to measure propagation delay time difference between the first and second photodetection signals, a delay unit (600) which delays the first and second photodetection signals based on the signal propagation delay time difference such that delay times of the first and second photodetection signals are equalized to each other, and a signal processing circuit (114) which processes the first and second photodetection signals delayed by the delay unit, and provides the processed signals.

摘要翻译： 本发明的光盘装置包括用激光束照射光盘的光学拾取器（110），包括第一光接收元件和第二光接收元件的光接收单元，光接收单元接收 从光盘反射的激光束提供与反射激光束相对应的第一光电检测信号和第二光电检测信号，测量单元（400,500），其从光学拾取器接收第一和第二光电检测信号以测量传播延迟时间 第一和第二光电检测信号之间的差异;延迟单元（600），其基于所述信号传播延迟时间差延迟所述第一和第二光电检测信号，使得所述第一和第二光电检测信号的延迟时间彼此相等;以及 信号处理电路（114），处理由延迟单元延迟的第一和第二光电检测信号， 处理的信号。