Light spot position control system and method by sampling servo
    2.
    发明授权
    Light spot position control system and method by sampling servo 失效
    光点位置控制系统和采样伺服方法

    公开(公告)号:US4785442A

    公开(公告)日:1988-11-15

    申请号:US072095

    申请日:1987-07-10

    CPC分类号: G11B7/09

    摘要: A light spot position control system of the invention uses an optical disc in which a servo area and a data area are alternately formed along a rotating direction of a rotary recording medium, wherein error signals obtained from the servo areas are sampled, the latest sample value is compared with at least one-preceding sample value, a check is made to see if the latest sample value is correct or incorrect, and when the latest sample value is decided to be incorrect, the preceding error signal held is directly used as a light spot position control signal without updating the current error signal holding value.

    摘要翻译: 本发明的光点位置控制系统使用其中伺服区域和数据区域沿着旋转记录介质的旋转方向交替形成的光盘,其中从伺服区域获得的误差信号被采样,最新采样值 与至少一个以前的采样值进行比较,进行检查以查看最新采样值是否正确或不正确,并且当最新采样值被确定为不正确时,所保持的前一个误差信号直接用作光 点位置控制信号,而不更新当前误差信号保持值。

    Light spot position control system and method by sampled servo
    3.
    发明授权
    Light spot position control system and method by sampled servo 失效
    光点位置控制系统及采样伺服方式

    公开(公告)号:US4872152A

    公开(公告)日:1989-10-03

    申请号:US131643

    申请日:1987-12-11

    IPC分类号: G02B7/28 G11B7/09 G11B21/10

    CPC分类号: G11B7/0906

    摘要: In a light spot position control system and method in which a control of the irradiation position of a light spot such as a focusing control, a jitter correction and/or a tracking control is made through a sampling control, a newly sampled error value is compared with a one-preceding sampled value. When a difference between both the values is within a range of a predetermined width, the newly sampled value is used as a new sample value as it is. When the difference exceeds the range of the predetermined width, a sum of the one-preceding sampled value and the predetermined width is used as a new sample value. Thereby, the influence of erroneous samples is reduced.

    摘要翻译: 在通过采样控制进行聚焦控制,抖动校正和/或跟踪控制等光点的照射位置的控制的光点位置控制系统和方法中,对新采样的误差值进行比较 具有一个先前的采样值。 当两个值之间的差在预定宽度的范围内时,新采样的值被原样用作新的采样值。 当差超过预定宽度的范围时,将一次取样值与预定宽度的和用作新的样本值。 从而减少错误样品的影响。

    Optical information recording and reproducing apparatus with tracking
control by sampling
    4.
    发明授权
    Optical information recording and reproducing apparatus with tracking control by sampling 失效
    具有采样跟踪控制的光信息记录和再现设备

    公开(公告)号:US4847822A

    公开(公告)日:1989-07-11

    申请号:US71347

    申请日:1987-07-09

    IPC分类号: G11B7/09 G11B7/095

    CPC分类号: G11B7/0938 G11B7/0948

    摘要: An optical information recording and reproducing apparatus of a sampling servo system which effects the tracking by holding the differential output of the reproduced signals of tracking pits that are wobbled toward the right and left relative to the track of the optical disk. Reproduced signals of a plurality of pits arranged maintaining a distance on the track and wobbled toward the right or left in a servo signal region, are compared with each other to detect any abnormal condition in the tracking pits. When the abnormal condition is detected, the tracking signal that is sampled is not used, but instead the tracking signal sampled under the normal condition is continuously used to perform the tracking control.

    摘要翻译: 一种采样伺服系统的光学信息记录和再现装置,其通过保持相对于光盘的轨道向左右摆动的跟踪凹坑的再现信号的差分输出来实现跟踪。 将维持轨道上的距离并且在伺服信号区域中向左或向左摆动的多个坑的再现信号彼此进行比较,以检测跟踪凹坑中的任何异常状况。 当检测到异常情况时,不使用采样的跟踪信号,而是在正常条件下采样的跟踪信号被连续地用于执行跟踪控制。

    Method and device for recording and reproducing tracking information
    7.
    发明授权
    Method and device for recording and reproducing tracking information 失效
    用于记录和再现跟踪信息的方法和装置

    公开(公告)号:US4392219A

    公开(公告)日:1983-07-05

    申请号:US252593

    申请日:1981-04-09

    IPC分类号: H04N5/85 G11B7/09 G11B21/10

    CPC分类号: G11B7/0938 G11B21/10

    摘要: A method for recording and reproducing information characterized in that an information train in which synchronizing signals are arrayed at equal time intervals between information signals is recorded in an information track on a recording medium which is wobbled in synchronism with the synchronizing signals and at a frequency integral times the frequency of the synchronizing signals, that the information train recorded in the information track is read out by read-out means, and that a position of the read-out means is controlled on the basis of the information train read out. The wobbling waveform is 90.degree. out of phase with a harmonic component of the synchronizing signals.

    摘要翻译: 一种用于记录和再现信息的方法,其特征在于,在信息信号之间以相等的时间间隔排列同步信号的信息列被记录在与同步信号同步地摆动的记录介质上的信息轨道中,并以频率积分 乘以同步信号的频率,通过读出装置读出记录在信息轨道中的信息列,并且基于读出的信息列来控制读出装置的位置。 摆动波形与同步信号的谐波分量相差90°。

    Non-contact, electromagnetically coupled transmission and receiving
system for IC cards
    8.
    发明授权
    Non-contact, electromagnetically coupled transmission and receiving system for IC cards 失效
    用于IC卡的非接触式,电磁耦合传输和接收系统

    公开(公告)号:US5418353A

    公开(公告)日:1995-05-23

    申请号:US325643

    申请日:1994-10-19

    IPC分类号: G06K7/00 G06K19/07 G06K5/00

    CPC分类号: G06K19/0723 G06K7/0008

    摘要: A non-contact IC card communication in which power consumption of a driver of a reader/writer is reduced and the size of a power supply circuit for operating the driver is made small. The driver has a low output impedance. A current detecting circuit including a detecting coil magnetically coupled with a transceiver coil of the reader/writer through a magnetic coiling element and a resistor detects a current which flows through the transceiver coil. A voltage drop to be detected is small and is approximately constant for a variation of the transceiver coil current. When data is read from an IC card, a load of the driver is changed. The driver drives the transceiver coil in a constant voltage fashion even if a current flowing through the transceiver coil changes due to the change in load. Input voltages of a rectifying/smoothing circuit and a regulator in the IC card become approximately constant. As a result, the amplitude of a high frequency output voltage of the driver can be made small. Also, a high frequency signal current sent from a reader/writer is subjected to double modulation including amplitude modulation by card data and modulation by second information, such as information indicative of the abnormality of an IC card, in synchronism with a timing at which data transmission between the reader/writer and the card is made, and the second information is extracted by the reader/writer.

    摘要翻译: 读取器/写入器的驱动器的功耗减小并且用于操作驱动器的电源电路的尺寸变小的非接触IC卡通信。 驱动器具有低输出阻抗。 电流检测电路包括通过磁性卷绕元件与读取器/写入器的收发器线圈磁耦合的检测线圈和电阻器,检测流过收发器线圈的电流。 要检测的电压降很小,并且对于收发器线圈电流的变化大致恒定。 当从IC卡读取数据时,改变驱动器的负载。 即使流经收发器线圈的电流由于负载变化而变化,驱动器以恒定电压方式驱动收发器线圈。 IC卡中的整流/平滑电路和稳压器的输入电压变为近似恒定。 结果,能够使驱动器的高频输出电压的振幅变小。 此外,从读取器/写入器发送的高频信号电流与数据的定时同步地进行包括由卡数据的幅度调制和第二信息的调制(例如表示IC卡的异常的信息)的双调制 进行读写器与卡之间的传输,读/写器提取第二信息。

    Non-contact system parallel data transfer system
    9.
    发明授权
    Non-contact system parallel data transfer system 失效
    非接触式系统并行数据传输系统

    公开(公告)号:US5574273A

    公开(公告)日:1996-11-12

    申请号:US257906

    申请日:1994-06-13

    IPC分类号: G06K7/08 G06K19/06 G06K7/06

    CPC分类号: G06K7/10336

    摘要: An electromagnetic coupling connector for transferring data by an electromagnetic coupling system, including a plurality of data transfer coils for transferring data, disposed at an end portion of a side surface of the connector, a waveform shaper for shaping a waveform of a data signal received by the data transfer coils, and a connector for transferring the signal obtained by the waveform shaper to an equipment to which the electromagnetic coupling connector is fitted. The electromagnetic coupling connector may include a signal transmission/reception portion and a power transmission or reception portion, the signal transmission/reception portion includes a signal amplification circuit, a waveform shaping circuit, a serial/parallel signal conversion circuit and a parallel/serial signal conversion circuit, the power transmission portion includes an oscillation circuit, and the power reception portion includes a rectification/smoothing circuit and a constant voltage.

    摘要翻译: 一种用于通过电磁耦合系统传送数据的电磁耦合连接器,包括设置在连接器侧面端部的用于传送数据的多个数据传送线圈,用于对由 数据传送线圈和用于将由波形整形器获得的信号传送到安装有电磁耦合连接器的设备的连接器。 电磁耦合连接器可以包括信号发送/接收部分和电力传输或接收部分,信号发送/接收部分包括信号放大电路,波形整形电路,串行/并行信号转换电路和并行/串行信号 电力传输部分包括振荡电路,并且电力接收部分包括整流/平滑电路和恒定电压。

    Non-contact information medium and communication system utilizing the same
    10.
    发明授权
    Non-contact information medium and communication system utilizing the same 失效
    非接触式信息媒体和利用其的通信系统

    公开(公告)号:US06837438B1

    公开(公告)日:2005-01-04

    申请号:US09430186

    申请日:1999-10-29

    摘要: In a non-contact IC (integrated circuit) module having an IC chip and a coil, the non-contact IC module communicates with a terminal via a booster unit. A communication system extends a communication distance of data modulated by using a carrier frequency (sub-carrier frequency). A communication auxiliary apparatus is used in a communication between a non-contact information medium and an external appliance.

    摘要翻译: 在具有IC芯片和线圈的非接触IC(集成电路)模块中,非接触式IC模块经由增压单元与端子通信。 通信系统通过使用载波频率(副载波频率)来扩展调制的数据的通信距离。 通信辅助设备用于非接触式信息介质和外部设备之间的通信。