-
公开(公告)号：CA1219367A
公开(公告)日：1987-03-17
申请号：CA454906
申请日：1984-05-23
Applicant: SONY CORP
Inventor： MOTOYAMA TADASHI
Abstract: VIDEO SIGNAL RECORDING AND REPRODUCING APPARATUS A video signal recording and reproducing apparatus used with a disc as recording medium comprises a head assembly, disc rotating means for rotating the disc in relation to the head assmbly, a signal path extending from an input terminal to which a video signal is supplied to be recorded to the head assembly, a first control circuit for controlling the disc rotating means so as to cause the disc to have the rotation varying in response to the phase of a synchronous signal, such as a horizontal synchronous signal in the video signal supplied to the input terminal, variable delay means provided in the signal path for delay the video signal supplied to the input terminal to vary the time base thereof, and a second control circuit for controlling the delay time in the variable delay means so as to cause the video signal derived from the variable delay means to have the time base varying in response to the phase of a reference signal, such as a horizontal reference signal reproduced from the disc through the head assembly.
-
公开(公告)号：FR2497989A1
公开(公告)日：1982-07-16
申请号：FR8200461
申请日：1982-01-13
Applicant: SONY CORP
Inventor： MOTOYAMA TADASHI
Abstract: An optical reproducing device for reproducing information from a rotating record medium includes a focus control system for displacing a focusing lens perpendicular to the plane of the record medium. A light beam is conducted through the focusing lens on to the record medium. A capture range search system is provided to move the focusing lens at a substantially constant speed from a rest position until it is positioned within the capture range of the focusing control system. The capture range search system includes a bridge circuit for sensing the moving speed of the focusing lens. The bridge circuit includes a moving coil of a drive motor for said focusing lens and a variable impedance element. The bridge circuit is balanced by controlling the variable impedance element when the lens is at the rest position.
-
公开(公告)号：CA1228162A
公开(公告)日：1987-10-13
申请号：CA470774
申请日：1984-12-21
Applicant: SONY CORP
Inventor： OTSUKA TORU , MOTOYAMA TADASHI
Abstract: An optical information reproducing apparatus for reproducing an information recorded on a recording surface of a disc shape record medium is disclosed, which includes an optical pick-up device mounted on a tiltable optical block and having a laser beam source for generating a laser beam and a photo detector for detecting the reflected beam from the recording surface and for reproducing the recorded information, a device for rotating the record medium, a skew error detector for detecting a skew of the record medium relative to the optical pick-up device and for generating a skew error signal having a D.C. component and an A.C. component, a control circuit supplied with the skew error signal and for generating a control signal responsive to the D.C. component of the skew error signal, a skew error corrector controlled by the control signal and for controlling the optical block so that the optical axis of the pick up device is maintained to be always perpendicular to the recording surface. The above control circuit includes a comparator for comparing the level of the skew error signal with a threshold level and for generating an output pulse, the width of which corresponds to the D.C. component of the skew error signal, and a pulse width discriminator for discriminating the width of the output pulse relative to a reference pulse corresponding to a rotating period of the record medium.
-
公开(公告)号：DE3200778A1
公开(公告)日：1982-12-09
申请号：DE3200778
申请日：1982-01-13
Applicant: SONY CORP
Inventor： MOTOYAMA TADASHI
Abstract: An optical reproducing device for reproducing information from a rotating record medium includes a focus control system for displacing a focusing lens perpendicular to the plane of the record medium. A light beam is conducted through the focusing lens on to the record medium. A capture range search system is provided to move the focusing lens at a substantially constant speed from a rest position until it is positioned within the capture range of the focusing control system. The capture range search system includes a bridge circuit for sensing the moving speed of the focusing lens. The bridge circuit includes a moving coil of a drive motor for said focusing lens and a variable impedance element. The bridge circuit is balanced by controlling the variable impedance element when the lens is at the rest position.
-
公开(公告)号：DE3480503D1
公开(公告)日：1989-12-21
申请号：DE3480503
申请日：1984-05-24
Applicant: SONY CORP
Inventor： MOTOYAMA TADASHI
-
Patent Agency Ranking
公开(公告)号：CA1191949A
公开(公告)日：1985-08-13
申请号：CA393543
申请日：1982-01-04
Applicant: SONY CORP
Inventor： MOTOYAMA TADASHI
Abstract: An optical reproducing device for reading-out of an information from a rotational record medium. A focus servo system is provided for displacing a focusing lens perpendicularly of the plane of the record medium. A light beam is conducted through said focusing lens on to the medium. A capture range search system is provided to move the focussing lens at a substantially constant speed from a rest position until it is position within the capture range of the focusing servo system. The capture range search system is provided with a bridge circuit for sensing the moving speed of the focusing lens. The bridge circuit includes a moving coil of a drive motor for said focusing lens and a variable impedance element. The bridge circuit is balanced by controlling the variable impedance element when the lens is at the rest position.
-
-
公开(公告)号：JPS59171279A
公开(公告)日：1984-09-27
申请号：JP4516983
申请日：1983-03-17
Applicant: Sony Corp
Inventor： MOTOYAMA TADASHI
Abstract: PURPOSE:To simplify the constitution of a video disc player by synchronizing respectively a reproduced vertical synchronizing signal and a reproduced horizontal synchronizing signal to an external vertical synchronizing signal and an external horizontal synchronizing signal. CONSTITUTION:A phase locked loop PLL11 generates an auxiliary horizontal synchronizing signal FHS having a prescribed relation to a frequency of the external synchronizing signal. Then, a PLL control section 22 controls the PLL11 in response to the phase difference between the external vertical synchronizing signal FVO and the reproduced vertical synchronizing signal FV so as to change the relation between the frequencies of the signals FHS and FHO. Further, the phase between the signal FHS and the reproduced horizontal synchronizing signal FV is compared by a phase comparison section 17 and a drive control section 19 controls the rotation of a video disc based on an output of the result of the phase comparison. Then, the signals FH and FV are synchronized respectively by the external horizontal synchronizing signal FHO and the external vertical synchronizing signal.
Abstract translation: 目的：通过将再现的垂直同步信号和再现的水平同步信号分别同步到外部垂直同步信号和外部水平同步信号来简化视频盘播放器的结构。 构成：锁相环PLL11产生与外部同步信号的频率具有规定关系的辅助水平同步信号FHS。 然后，PLL控制部分22响应于外部垂直同步信号FVO和再现的垂直同步信号FV之间的相位差来控制PLL11，以便改变信号FHS和FHO的频率之间的关系。 此外，通过相位比较部分17比较信号FHS和再现的水平同步信号FV之间的相位，驱动控制部分19基于相位比较结果的输出来控制视频盘的旋转。 然后，信号FH和FV分别由外部水平同步信号FHO和外部垂直同步信号同步。
-
公开(公告)号：JPS57120237A
公开(公告)日：1982-07-27
申请号：JP416581
申请日：1981-01-14
Applicant: Sony Corp
Inventor： MOTOYAMA TADASHI
CPC classification number: G11B7/08511 , G11B7/085 , G11B7/0909
Abstract: PURPOSE: To eliminate the influence of temperature fluctuations, a secular change, etc., by controlling automatic balancing by using a variable impedance element for one side of a bridge circuit which detects the moving speed of a condenser.
CONSTITUTION: A moving-speed detection voltage V obtained by finding a difference in voltage between the points B and C of a bridge circuit 21 by a subtracter 27 is accumulated in the hold capacitor 45 of a sample holding circuit 39 through a low-pass filter 44. The output of the sample holding circuit 39 is sent to a variable impedance element 38, and consequently a variable impedance element 38 is so controlled that the sample holding circuit 39 is balanced. If the output of a control oscillator 40 goes up to a high level in a bridge-balanced state, a changeover switch 41 is changed over to a contact 41b, and the switch 43 of the sample holding circuit 39 turns off, so that a condenser 10 fitted to a coil 20 approaches a disk at a constant speed.
COPYRIGHT: (C)1982,JPO&JapioAbstract translation: 目的：通过使用检测冷凝器移动速度的桥式电路一侧的可变阻抗元件来控制自动平衡，消除温度波动，长期变化等的影响。 构成：通过减法器27求出桥接电路21的点B和点C之间的电压差获得的移动速度检测电压V通过低通滤波器累积在采样保持电路39的保持电容器45中 样品保持电路39的输出被发送到可变阻抗元件38，因此可变阻抗元件38受到控制，使得样品保持电路39平衡。 如果控制振荡器40的输出在桥接平衡状态下上升到高电平，则转换开关41转换到触点41b，并且样本保持电路39的开关43断开，使得电容器 10线圈20以恒定的速度接近盘。
-
公开(公告)号：JPH0685230B2
公开(公告)日：1994-10-26
申请号：JP295685
申请日：1985-01-11
Applicant: SONY CORP
Inventor： YAMAKAWA AKIO , MOTOYAMA TADASHI
-
-
-
-
-
-
-
-
-
Search Results
33
records
(took 0.022 seconds)
