Method and apparatus for preventing cross-talk during reproduction of
data recorded on a high density recording medium
    1.
    发明授权
    Method and apparatus for preventing cross-talk during reproduction of data recorded on a high density recording medium 失效
    用于在再现记录在高密度记录介质上的数据时防止串扰的方法和装置

    公开(公告)号:US5493553A

    公开(公告)日:1996-02-20

    申请号:US284653

    申请日:1994-08-17

    摘要: A method and system for preventing cross-talk during reproduction of data recorded on a high density recording medium. The method includes the steps of receiving signals from at least three consecutively parallel information tracks on a recording medium, determining first and second cross-talk coefficients representing a degree of cross-talk between the three parallel information tracks, filtering the first and second cross-talk coefficients, correcting the cross-talk between the first, second, and third information tracks in accordance with the first and second cross-talk coefficients, forming a difference between the first and second cross-talk coefficients and integrating this difference to generate a track following correction signal, and repeating the above steps for each of the information tracks on the recording medium.

    摘要翻译: PCT No.PCT / FR93 / 01279 Sec。 371日期:1994年8月17日 102(e)日期1994年8月17日PCT提交1993年12月21日PCT公布。 出版物WO94 / 15335 日期:1994年7月7日。一种用于在再现记录在高密度记录介质上的数据时防止串扰的方法和系统。 该方法包括以下步骤:从记录介质上的至少三个连续并行的信息轨道接收信号,确定表示三个并行信息轨迹之间的串扰程度的第一和第二串扰系数, 通话系数,根据第一和第二串扰系数校正第一,第二和第三信息轨道之间的串扰,形成第一和第二串扰系数之间的差异并积分该差异以产生轨迹 跟随校正信号,并且对记录介质上的每个信息轨道重复上述步骤。

    Digital filtering system for signals
    4.
    发明授权
    Digital filtering system for signals 失效
    信号数字滤波系统

    公开(公告)号:US5818741A

    公开(公告)日:1998-10-06

    申请号:US632932

    申请日:1996-04-16

    CPC分类号: H04L27/066

    摘要: The disclosure relates to a A digital filtering system of a signal, including a calculation circuit that calculates the average increase in amplitude .DELTA.X.sub.av (n) between two samples X(n), and an "output signal (Y(n)) circuit" that calculates a mean, weighted by a coefficient a, of the sample to be filtered X(n) and the previous sample Y(n-1) algebraically increased by said average increase in amplitude .DELTA.X.sub.av (n). The invention is applicable to digital signal processing.

    摘要翻译: 本公开涉及一种信号的A数字滤波系统,包括计算电路,该计算电路计算两个采样X(n)和“输出信号(Y(n))电路之间的振幅DELTA Xav(n)的平均增加” 其计算由要滤波的样本X(n)的系数a加权的平均值,并且先前样本Y(n-1)通过所述平均增幅ΔTATA×AV(n)代数增加。 本发明适用于数字信号处理。

    Electronic optics device with variable illumination and aperture
limitation, and application thereof to an electron beam lithographic
system
    6.
    发明授权
    Electronic optics device with variable illumination and aperture limitation, and application thereof to an electron beam lithographic system 失效
    具有可变照明和孔径限制的电子光学器件及其应用于电子束光刻系统

    公开(公告)号:US4918318A

    公开(公告)日:1990-04-17

    申请号:US112671

    申请日:1987-10-14

    CPC分类号: H01J37/3007

    摘要: An electronic optics device with variable illumination and aperture limitation is provided including, between a particle source and an object an image of which it is desired to project in an image plane, a set of three lenses with electronically controllable focal lengths, the first one being situated as close as possible to the source and associated, in its main plane or in the vicinity of this plane, with an aperture limitation diaphragm, the object being placed in the main plane of the third lens or in the vicinity thereof, the focal length of these three lenses being controlled so as to give to the section of the electronic beam in the object plane a value determining the desired illumination and to the image of the diaphragm a diameter and a position determining the desired aperture of the beam.

    摘要翻译: 提供具有可变照明和孔径限制的电子光学装置,包括在粒子源和物体之间需要在图像平面中投影的图像,具有电子可控焦距的三个透镜组,第一个 位于尽可能靠近源并且在其主平面中或在该平面附近,具有孔径限制膜,物体被放置在第三透镜的主平面中或其附近,焦距 这些三个透镜被控制以便在物平面中给予电子束的部分,以确定所需照明的值和光圈的图像的直径和确定光束的期望光圈的位置。