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公开(公告)号：US3665437A
公开(公告)日：1972-05-23
申请号：US3665437D
申请日：1970-06-22
Applicant: IBM
Inventor： MUELLER FRANCIS E
CPC classification number: G11B5/5521 , G11B5/59633
Abstract: This invention discloses a method for aligning magnetic heads for use in recording a master disk pack. The steps comprise recording a signal for use in determining a reference track on each of a plurality of disks, assembling the disks on a hub so as to form a disk pack, and aligning a plurality of packwriting heads so that each head corresponds to the reference track.
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2.发明授权Positioning system including servo track configuration and associated demodulator 失效定位系统包括伺服轨迹配置和相关的解调器
公开(公告)号：US3691543A
公开(公告)日：1972-09-12
申请号：US3691543D
申请日：1971-02-08
Applicant: IBM
Inventor： MUELLER FRANCIS E
CPC classification number: G05D3/14 , G11B5/58 , G11B5/59616
Abstract: The invention relates to a positioning system which provides a series of adjacent servo tracks, the boundary between adjacent servo tracks defining a path for the servo system to follow. The servo track configuration generating an output signal in a transducer which has positive pulses for synchronization and negative pulses for positioning information and gain control information. A demodulator is used for separating the synchronization signal from the position and gain control signals. The synchronization signal is used to separate portions of the positioning and gain control signal so as to generate a positioning signal that is indicative of the position of the transducer with respect to the servo tracks and for generating an automatic gain control signal for the demodulator itself.
Abstract translation: 本发明涉及一种定位系统，其提供一系列相邻的伺服轨道，相邻伺服轨道之间的边界限定了伺服系统跟随的路径。 伺服轨迹配置在具有用于同步的正脉冲的转换器中产生输出信号，以及用于定位信息和增益控制信息的负脉冲。 解调器用于将同步信号与位置和增益控制信号分离。 同步信号用于分离定位和增益控制信号的部分，以产生指示换能器相对于伺服磁道的位置并产生用于解调器本身的自动增益控制信号的定位信号。
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公开(公告)号：US3633202A
公开(公告)日：1972-01-04
申请号：US3633202D
申请日：1969-12-31
Applicant: IBM
Inventor： KUCKEIN PAUL A , MUELLER FRANCIS E
CPC classification number: H03M1/00 , H03M1/1009
Abstract: The method and apparatus for providing a self-calibrating ADC of the type which utilizes a voltage controlled oscillator in conjunction with a counting register to translate an analog signal into time domain. A second counting register, a fixed frequency pulse source, and zero and full scale reference voltages are used to generate span and zero calibration factors to any desired accuracy.
Abstract translation: 该方法和装置用于提供一种类型的自校准ADC，其利用压控振荡器与计数寄存器一起将模拟信号转换成时域。 使用第二计数寄存器，固定频率脉冲源和零和全量程参考电压来产生跨度和零校准因子以达到任何所需的精度。
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Patent Agency Ranking
公开(公告)号：US3609562A
公开(公告)日：1971-09-28
申请号：US3609562D
申请日：1970-07-17
Applicant: IBM
Inventor： GRANATA PETER J , MUELLER FRANCIS E
CPC classification number: G11B20/16 , G11B5/59616
Abstract: This invention relates to a demodulator used in a servopositioning system which is maintained in synchronization both during the track-seeking mode and the fine-positioning mode of operation of the servosystem. The demodulator monitors signals received from the servoed medium and obtains from this signal, positioning information between the servoed means and the servoing apparatus, while obtaining synchronization information from the same received signals. The demodulator is comprised of a positive level detector, a negative level detector, a synchronizable free-running multivibrator, delayed single shots, gates, a positive peak detector and a negative peak detector. A means for including a noise rejection means into the demodulator is also shown.
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公开(公告)号：CA804744A
公开(公告)日：1969-01-21
申请号：CA804744D
Applicant: IBM
Inventor： HELGESON LESTER A , MUELLER FRANCIS E
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公开(公告)号：CA955682A
公开(公告)日：1974-10-01
申请号：CA133822
申请日：1972-02-03
Applicant: IBM
Inventor： MUELLER FRANCIS E
Abstract: The invention relates to a positioning system which provides a series of adjacent servo tracks, the boundary between adjacent servo tracks defining a path for the servo system to follow. The servo track configuration generating an output signal in a transducer which has positive pulses for synchronization and negative pulses for positioning information and gain control information. A demodulator is used for separating the synchronization signal from the position and gain control signals. The synchronization signal is used to separate portions of the positioning and gain control signal so as to generate a positioning signal that is indicative of the position of the transducer with respect to the servo tracks and for generating an automatic gain control signal for the demodulator itself.
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