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公开(公告)号：EP0108226B1
公开(公告)日：1987-11-25
申请号：EP83109325.7
申请日：1983-09-20
IPC分类号： G11B5/58
CPC分类号： G11B5/59688
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公开(公告)号：EP0009663A1
公开(公告)日：1980-04-16
申请号：EP79103350.9
申请日：1979-09-07
CPC分类号： G11B5/5547 , G01P3/42
摘要： An electronic tachometer circuit uses a cyclically discontinuous position error signal PES to derive a velocity signal. The signal PES is differentiated by a narrow bandwidth high pass filter in a position channel 27. Motor current signals are used to derive a current reference signal by a low pass filter in a current channel 29. Discontinuous portions of the signal PES are detected by a level detector42 which then activates a track and fill circuit 32 to provide a fill-in signal from the current reference signal to the position channel 27.
摘要翻译： 电子转速计电路使用循环不连续位置误差信号PES来导出速度信号。 信号PES由位置信道27中的窄带宽高通滤波器区分。电动机电流信号用于通过当前通道29中的低通滤波器导出电流参考信号。信号PES的不连续部分由 电平检测器42，其然后激活轨道和填充电路32以从当前参考信号向位置通道27提供填充信号。
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公开(公告)号：EP0108226A1
公开(公告)日：1984-05-16
申请号：EP83109325.7
申请日：1983-09-20
IPC分类号： G11B5/58
CPC分类号： G11B5/59688
摘要： A track-seeking and track-following servo encodement and detection system employs a servo pattern using a reference signal (f r ) and control signals (2f r ), the control signals having an orthogonal phase relationship to each other by cyclically revolving in phase by 90°, 180°, 270°, and repeating this pattern every four tracks.
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公开(公告)号：EP0009663B1
公开(公告)日：1983-06-08
申请号：EP79103350.9
申请日：1979-09-07
CPC分类号： G11B5/5547 , G01P3/42
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