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公开(公告)号：US09311941B1
公开(公告)日：2016-04-12
申请号：US14675507
申请日：2015-03-31
CPC分类号： G11B5/59638 , G11B5/024 , G11B5/03 , G11B5/59627 , G11B5/59683 , G11B20/1217 , G11B2020/10851 , G11B2020/1281
摘要： In an in-drive erase process for erasing disk surfaces of a hard disk drive, erase spirals are written on multiple disk surfaces and at a different write frequency than that of other data patterns on the disk surfaces. The erase spirals written on a first disk surface can be used to control an erase process on a portion of the remaining disk surfaces. Erase spirals are then written on a different disk surface and can then be used to erase all data on the first disk surface. Consequently, even when every disk surface includes previously written data patterns that can potentially interfere with control of the erase process, the erase spirals so written can control the erase process with sufficient precision to thoroughly erase each disk surface.
摘要翻译： 在擦除硬盘驱动器的磁盘表面的驱动器内擦除过程中，擦除螺旋写在多个磁盘表面上，写入频率与磁盘表面上的其他数据模式不同。 写在第一磁盘表面上的擦除螺旋可用于控制剩余磁盘表面的一部分上的擦除过程。 然后将擦除螺旋写在不同的磁盘表面上，然后可以用于擦除第一个磁盘表面上的所有数据。 因此，即使当每个盘表面包括可能潜在地干扰擦除处理的控制的先前写入的数据模式时，如此写入的擦除螺旋可以以足够的精度来控制擦除处理以彻底擦除每个盘表面。
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2.发明申请公开(公告)号：US20020075586A1
公开(公告)日：2002-06-20
申请号：US09957406
申请日：2001-09-20
IPC分类号： G11B005/02
CPC分类号： G11B5/09 , G11B5/012 , G11B5/03 , G11B5/4886 , G11B2005/0029
摘要： A transducing head for perpendicularly writing data to a magnetic medium having a recording layer and a soft magnetic underlayer comprises a perpendicular write transducer for writing data into the recording layer and a DC magnetic writer having legs in spaced relation to generate a magnetic field along tracks of the magnetic medium. The magnetic field writes a DC magnetic effect longitudinally into the soft magnetic underlayer, thereby reducing noise due to the operation of the perpendicular write transducer.
摘要翻译： 用于将数据垂直写入具有记录层和软磁性底层的磁介质的转换头包括用于将数据写入记录层的垂直写入传感器和具有间隔开的腿的直流磁性写入器，以沿着轨迹形成磁场 磁介质。 磁场将直流磁效应纵向写入软磁性底层，从而降低由垂直写入传感器的操作引起的噪音。
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公开(公告)号：US06239932B1
公开(公告)日：2001-05-29
申请号：US09175245
申请日：1998-10-20
申请人： Abraham Hoogendoorn
发明人： Abraham Hoogendoorn
IPC分类号： G11B1514
摘要： An arrangement for recording servo signals on a magnetic tape has first and second adjoining write heads respectively driven by first and second write signals. Each write signal includes a servo signal and a bias signal, the bias signals being phase displaced periodic signals which result in the magnetic tape being magnetized alternately by the first and second write heads. This provides a sharp transition in the servo signals produced from adjoining servo tracks during read-out.
摘要翻译： 用于在磁带上记录伺服信号的装置具有分别由第一和第二写入信号驱动的第一和第二邻接写入头。 每个写入信号包括伺服信号和偏置信号，偏置信号是相移位的周期性信号，导致磁带被第一和第二写入头交替地磁化。 这提供了在读出期间从邻接的伺服磁道产生的伺服信号的急剧变化。
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4.发明授权
公开(公告)号：US6064538A
公开(公告)日：2000-05-16
申请号：US24771
申请日：1998-02-17
申请人： Yoshio Higuchii
发明人： Yoshio Higuchii
CPC分类号： G11B5/0086 , G11B5/024 , G11B5/03
摘要： A biasing/erasing oscillator includes a series circuit formed by an entire-width erasing head, a linear record erasing head and an inductor. The series circuit is connected in parallel with an oscillating capacitor to form an LC resonant circuit. The LC resonant circuit is connected to a base of a transistor through a direct current blocking capacitor. The transistor has an emitter is connected to a series junction point, for example, between a sound erasing head and the inductor. A collector of the transistor is supplied with a bias voltage, while the transistor base is supplied with a bias current through a bias resistor. The direct current blocking capacitor prevents the bias current from flowing into the LC resonant circuit.
摘要翻译： 偏置/擦除振荡器包括由全宽擦除头，线性记录擦除头和电感器形成的串联电路。 串联电路与振荡电容并联连接，形成LC谐振电路。 LC谐振电路通过直流阻塞电容器连接到晶体管的基极。 晶体管的发射极连接到例如声音擦除头和电感之间的串联连接点。 晶体管的集电极被提供偏置电压，而晶体管基极通过偏置电阻器提供偏置电流。 直流阻塞电容器防止偏置电流流入LC谐振电路。
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公开(公告)号：US5828764A
公开(公告)日：1998-10-27
申请号：US795242
申请日：1997-02-10
申请人： Hai-wook Lee , Igor G. Vikulov
发明人： Hai-wook Lee , Igor G. Vikulov
CPC分类号： G11B5/03
摘要： An apparatus for controlling an audio recording bias is provided for improving a signal-to-noise (S/N) ratio in a high-frequency region of a recording signal by controlling a bias when an audio signal is recorded. The apparatus includes a high-pass filter for passing only high frequency components of an input audio signal, and a bias signal generator for generating an oscillating bias signal which is inversely proportional to the level of the high-pass filtered audio signal, and is of a predetermined level in the middle- and low-frequencies of the input audio signal. In the above-described apparatus, a bias level is controlled in the high-frequency region of an input audio signal so that the saturation of the audio signal in the high-frequency region is prevented to thereby expand a frequency area of the signal being recorded. Also, the level of the recording signal is heightened compared to the conventional art, thereby improving the S/N ratio in the high-frequency region.
摘要翻译： 提供一种用于控制音频记录偏差的装置，用于通过在记录音频信号时控制偏压来改善记录信号的高频区域中的信噪比（S / N）比。 该装置包括用于仅通过输入音频信号的高频分量的高通滤波器和用于产生与高通滤波音频信号的电平成反比的振荡偏置信号的偏置信号发生器，并且 输入音频信号的中频和低频的预定电平。 在上述装置中，在输入音频信号的高频区域中控制偏置电平，从而防止高频区域中的音频信号的饱和度从而扩展正在记录的信号的频率区域 。 此外，与传统技术相比，记录信号的电平升高，从而提高了高频区域的S / N比。
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6.发明授权Biasing and erasing apparatus and method for magnetic tape recording devices to improve signal-to-noise ratio 失效用于提高信噪比的磁带记录装置的偏置和擦除装置和方法
公开(公告)号：US5321563A
公开(公告)日：1994-06-14
申请号：US898860
申请日：1992-06-15
申请人： Robert Sanford , Robert Cook , Gerald Stuteville
发明人： Robert Sanford , Robert Cook , Gerald Stuteville
摘要： A circuit for generating a bias signal and an erase signal for use in a recording apparatus having a record head for recording an input analog signal on a magnetic tape, and an erase head for erasing information from the tape. A DC erase signal is applied to the erase head in response to the erase control signal to cause the erase head to erase information. An AC bias signal is generated and is combined with the input analog signal to make a record signal. The record signal is applied to the record head in response to the record control signal to record information on the tape. A controller generates an erase control signal and as record control signal. The AC bias signal is generated by an AC bias oscillator, such as a Hartley oscillator to reduce the noise contributed in the recording system. Use of a DC source to drive the erase head reduces the cost of the circuit, while maintaining a significant increase in the signal-to-noise ratio.
摘要翻译： 用于产生偏置信号的电路和用于具有用于在磁带上记录输入模拟信号的记录头的记录装置中使用的擦除信号，以及用于从磁带擦除信息的擦除头。 响应于擦除控制信号将直流擦除信号施加到擦除头，以使擦除头擦除信息。 产生AC偏置信号并与输入的模拟信号组合以产生记录信号。 响应于记录控制信号将记录信号应用于记录头，以便在磁带上记录信息。 控制器产生擦除控制信号和作为记录控制信号。 AC偏置信号由诸如Hartley振荡器的AC偏置振荡器产生，以减少记录系统中贡献的噪声。 使用直流电源来驱动擦除头可以降低电路的成本，同时保持信噪比的显着提高。
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7.发明授权Method and apparatus for recording data information on a magnetic recording medium 失效用于记录磁记录介质的数据信息的方法和装置
公开(公告)号：US5119244A
公开(公告)日：1992-06-02
申请号：US508244
申请日：1990-04-11
申请人： Erik Hardeng
发明人： Erik Hardeng
CPC分类号： G11B20/10212 , G11B5/03
摘要： A method and an apparatus for recording data information on a magnetic recording medium with the assistance of a magnetic write head and a controllable record amplifier preceding the magnetic write head and to which the data information in the form of binary data signals, as well as bias signals superimposed thereon are supplied, are disclosed. The recorded signals are, in turn, read with a playback device immediately after the recording. In a measuring device, the peak shift of the read output signals is measured and averaged. The amplitudes for the binary data signals and/or of the bias signals are corrected with a control signal generated by a control unit dependent on the average peak shift, being corrected in order to achieve an optimum relationship of read output signal amplitude to minimum peak shift.
摘要翻译： 一种用于在磁写头之前借助磁写头和可控记录放大器在磁记录介质上记录数据信息的方法和装置，并且二进制数据信号形式的数据信息以及偏置 公开了叠加在其上的信号。 在记录之后，记录的信号依次用回放装置读取。 在测量装置中，测量并平均读出的输出信号的峰值偏移。 用二进制数据信号和/或偏置信号的振幅用由取决于平均峰值偏移的控制单元产生的控制信号进行校正，以便校正读取输出信号幅度与最小峰值偏移的最佳关系 。
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公开(公告)号：US5101309A
公开(公告)日：1992-03-31
申请号：US390370
申请日：1989-08-07
申请人： Yasuo Mitsuhashi
发明人： Yasuo Mitsuhashi
摘要： While prior art apparatus for magnetic recording and playback (VTRs) were unable to perform magnetic recording of an FM signal with an optimum recording current responding to change of the optimum recording current dependent on kinds of magnetic tapes used and wear of heads, the magnetic recording of an FM signal with the optimum recording current at all times has been made possible by having a recorded signal along a track of a magnetic tape read by a level servo head scanning the track following the signal recording and having the recording current controlled to be optimized by use of a recording current controlling device based on the playback signal output from the level servo head. As a result, improvement of the S/N ratio and automatic adjustment of the recording current can be achieved. Further, by means of a head drive unit, the position of the level servo head is finely adjusted so that the control for optimization of the recording current is performed accurately.
摘要翻译： 虽然用于磁记录和重放（VTR）的现有技术装置不能根据取决于使用的磁带的种类和磁头的磨损来响应于最佳记录电流的变化而对具有最佳记录电流的FM信号进行磁记录，磁记录 具有始终具有最佳记录电流的FM信号已经通过沿着沿着信号记录扫描轨道的电平伺服头读取的磁带的轨道上的记录信号成为可能，并且将记录电流控制为优化 通过使用基于从电平伺服磁头输出的重放信号的记录电流控制装置。 结果，可以实现S / N比的提高和记录电流的自动调整。 此外，通过头驱动单元，精细地调整液位伺服头的位置，从而精确地执行用于优化记录电流的控制。
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9.发明授权Dual gap cross-field magnetic recording head with single gap signal excitation 失效具有单间隙信号激励的双间隙交叉磁记录头
公开(公告)号：US4908724A
公开(公告)日：1990-03-13
申请号：US254760
申请日：1988-10-07
申请人： Frederick J. Jeffers
发明人： Frederick J. Jeffers
CPC分类号： G11B5/02 , G11B5/03 , G11B5/2654
摘要： In a recording system utilizing a cross-field head, rather than excite both the field gap and the recording gap with signal and bias excitation as taught in the prior art, the present invention teaches applying bias excitation to both the field gap and the recording gap (as known in the prior art), but applying the signal excitation solely to the recording gap. By following this teaching of the invention, the record zone length is decreased to allow shorter wavelength recording, while the short wavelength recorded signal level is increased by effectively eliminating opposing recorded regions of magnetization in the vertical signal component.
摘要翻译： 在如现有技术中所教导的利用交叉场磁头的记录系统中，不是用信号和偏置激励来激励磁场间隙和记录间隙，本发明教导了对磁场间隙和记录间隙 （如现有技术中已知的），但是仅将信号激励仅施加到记录间隙。 通过跟随本发明的教导，减小记录区长度以允许更短的波长记录，而通过有效地消除垂直信号分量中相反的记录磁化区域来增加短波长记录信号电平。
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10.发明授权Method of, and apparatus for, recording audio signals using recording signals free of audio frequencies 失效使用没有音频的记录信号记录音频信号的方法和装置
公开(公告)号：US4849837A
公开(公告)日：1989-07-18
申请号：US79795
申请日：1987-07-27
申请人： Paul Zwicky
发明人： Paul Zwicky
摘要： In order to record audio signals on a magnetic record carrier, there is produced a high frequency pulsed signal which contains the low frequency information pertinent to the audio signal. This high frequency pulsed signal is produced in a manner such as to be substantially free of any signal component which has a frequency lying in the frequency range of the low frequency audio signal. As a result, cross-talk produced during recording on a plurality of tracks can be substantially reduced.
摘要翻译： 为了将音频信号记录在磁记录载体上，产生包含与音频信号有关的低频信息的高频脉冲信号。 这种高频脉冲信号的产生方式是基本上没有任何信号分量，频率位于低频音频信号的频率范围内。 结果，可以显着地减少在多个轨道上的记录期间产生的串扰。
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