公开(公告)号：US5253130A

公开(公告)日：1993-10-12

申请号：US692390

申请日：1991-04-25

申请人： Jurgen Kaaden ,  Franz Bigge ,  Paul A. Gillot

发明人： Jurgen Kaaden ,  Franz Bigge ,  Paul A. Gillot

IPC分类号： G11B15/467 ,  G11B5/58

CPC分类号： G11B15/4676

摘要： In a calibration operation mode of a magnetic tape recorder for helical track recording, employing the R-DAT standard, a first magnitude of a pilot signal reproduced in a first magnetic head from a pilot signal recorded in a center track with respect to the first magnetic head is obtained. A second magnitude of a pilot signal reproduced in a second magnetic head from a pilot signal recorded in a center track with respect to the second magnetic head is also obtained. A ratio between the first and second magnitudes is calculated and stored prior to normal playback mode of operation. During normal playback mode of operation, the stored ratio is used for normalizing a first difference signal, between crosstalk pilot signals that are reproduced in one of the first and second magnetic heads relative to a second difference signal, between crosstalk pilot signals that are reproduced in the other one of the first and second magnetic heads. The first and second difference signals are applied to a capstan motor for reducing a head-track misalignment error.

摘要翻译： 在采用R-DAT标准的用于螺旋磁道记录的磁带记录仪的校准操作模式中，从记录在中心轨道上的导频信号的第一磁头中再现的第一幅度的第一幅度相对于第一磁 头被取得。 还获得了从记录在中心轨道上的相对于第二磁头的导频信号在第二磁头中再现的第二幅度的导频信号。 在正常播放操作模式之前，计算并存储第一和第二幅度之间的比率。 在正常播放操作模式期间，存储比率用于在第一差分信号之间，在第一和第二磁头之一相对于第二差分信号在一个中再现的串扰导频信号之间，在 第一和第二磁头中的另一个。 第一和第二差分信号被施加到主导轴电动机以减小磁头轨迹失准误差。

公开(公告)号：US5113397A

公开(公告)日：1992-05-12

申请号：US473671

申请日：1990-02-02

申请人： Jurgen Kaaden ,  Dietmar Uhde ,  Franz Bigge

发明人： Jurgen Kaaden ,  Dietmar Uhde ,  Franz Bigge

IPC分类号： G11B20/10 ,  G11B20/18 ,  G11B27/34 ,  G11B27/36 ,  G11B33/10

CPC分类号： G11B20/10527 ,  G11B20/18 ,  G11B27/34 ,  G11B27/36 ,  G11B33/10 ,  G11B2220/90 ,  G11B2220/913

摘要： A digital signal, such as obtained during playback from a DAT machine, includes a first component containing e.g. the audio content and a second component containing error recognition code. A signal processor derives in accordance with the second component an error signal representative of errors in the digital signal. A microcomputer then calculates an error rate signal. The error rate signal may be visually displayed or the error rate signal may be applied to the pre-amplifier circuits in the playback transducer stage to minimize the errors.

摘要翻译： 诸如在从DAT机器重放期间获得的数字信号包括第一部件， 音频内容和包含错误识别码的第二组件。 信号处理器根据第二分量导出代表数字信号中的误差的误差信号。 然后微型计算机计算错误率信号。 错误率信号可以在视觉上显示，或者可以将错误率信号施加到回放换能器级中的前置放大器电路，以最小化误差。

公开(公告)号：US5298812A

公开(公告)日：1994-03-29

申请号：US779719

申请日：1991-10-18

申请人： Franz Bigge

发明人： Franz Bigge

IPC分类号： H02P7/29 ,  G11B19/24 ,  H03D13/00 ,  H03F3/217 ,  H03K5/19 ,  H03L7/00

CPC分类号： G11B19/24 ,  H03D13/004

摘要： A regulating circuit for controlling the speed of a rotating disc to provide a constant frequency signal from the disc includes a signal pickup device which moves radially along the disc and provides a velocity signal the frequency of which changes by a factor .DELTA.f as the position of the pickup device on the disc changes. A processor receives the velocity signal and produces a control signal in accordance with the factor .DELTA.f. A change-over switch provides a fine range voltage and a coarse range voltage which are used to control the speed of the disc in a fine range mode and a coarse range mode, respectively.

摘要翻译： 用于控制旋转盘的速度以从盘提供恒定频率信号的调节电路包括：信号拾取装置，其沿着盘径向移动，并提供速度信号，其频率以因子（Delta）f变化为 拾取装置在盘上的位置改变。 处理器接收速度信号并根据系数（Delta）f产生控制信号。 切换开关提供精细范围电压和粗略范围电压，其分别用于在精细范围模式和粗略范围模式下控制盘的速度。