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1. 发明授权

US06954334B2 Magnetic head and rotary head drum device 失效
标题翻译：磁头和旋转磁头鼓装置
公开(公告)号：US06954334B2
公开(公告)日：2005-10-11
申请号：US10376586
申请日：2003-03-03
申请人： Toshiaki Wakita , Hisato Hirasaka , Fumiharu Sudo
发明人： Toshiaki Wakita , Hisato Hirasaka , Fumiharu Sudo
IPC分类号： G11B5/11 , G11B5/52 , G11B5/53 , G11B5/10
CPC分类号： G11B5/52 , G11B5/11
摘要： A magnetic head mounted on a rotary head drum device comprises a head chip, and a magnetic shield disposed to surround all or a part of the surfaces other than a front surface of the head chip. The magnetic shield comprises a magnetic flux absorber made of ferrite and an electromagnetic wave shield made of copper. This enables a reduction of the amount of unnecessary magnetic fluxes and electromagnetic waves jumping away from the recording head to the reproducing head. Simultaneously, the magnetic flux absorber absorbs the magnetic flux coming from outside to the reproducing head before the magnetic flux reaches the head chip and the electromagnetic wave shield shields a high frequency electromagnetic wave which was not absorbed by the magnetic flux absorber 80 that it is possible to reduce the amount of the magnetic flux or the like jumping into the reproducing head and to improve the S/N of the reproduced signal.
摘要翻译：安装在旋转磁头鼓装置上的磁头包括头部芯片和设置成围绕除了头部芯片的前表面之外的所有或部分表面的磁屏蔽。磁屏蔽包括由铁氧体制成的磁通量吸收器和由铜制成的电磁波屏蔽。这使得能够减少从记录头跳到再现头的不必要的磁通量和电磁波的量。同时，磁通吸收器在磁通量到达磁头芯片之前吸收从外部到再现磁头的磁通量，并且电磁波屏蔽屏蔽不被磁通量吸收器80吸收的高频电磁波，可能以减少跳入再现头的磁通量等并改善再现信号的S / N。

2. 发明授权

US07453665B2 Method of adjusting magnetic head of magnetic tape recording and reproducing apparatus and magnetic tape recording and reproducing apparatus 失效
标题翻译：磁带记录再现装置的磁头调整方法以及磁带录放装置
公开(公告)号：US07453665B2
公开(公告)日：2008-11-18
申请号：US11519398
申请日：2006-09-11
申请人： Hisato Hirasaka , Toshiaki Wakita
发明人： Hisato Hirasaka , Toshiaki Wakita
IPC分类号： G11B5/58 , G11B5/584
CPC分类号： G11B5/00839 , G11B5/588
摘要： Processing wherein a measurement signal and an erasure signal are recorded on adjacent tracks of a recordable tape 10 by one recording head HWi of n (i=1 to n) recording heads is effected on n recording heads, and measurement signals are recorded on n tracks substantially simultaneously by n recording heads HW1 to HWn in standard operation state. Then, reproducing heads with respect to thus obtained two kinds of tracks are displaced in track width directions, characteristic curves of reproduced signal waveform amplitudes of measurement signals displacement (off-track) amounts of tracks are obtained, half widths of these characteristic curves are assumed to be expedient track width and a variable Ri optimum and a variable Ri now corresponding to track widths of two kinds of tracks are obtained. Then, deviation between the variable Ri optimum and the variable Ri now is adjusted to become smaller than a desired value.
摘要翻译：在n个记录头上实现由n（i = 1〜n）个记录头的一个记录头HWi将测量信号和擦除信号记录在可记录磁带10的相邻轨道上的处理，并将测量信号记录在n个磁迹基本上同时由n个记录头HW 1至HWn在标准操作状态。然后，对于这样获得的两种轨道的再现头在轨道宽度方向上移位，获得测量信号位移（偏离轨迹）轨道数的再现信号波形幅度的特性曲线，假设这些特性曲线的半宽度获得有利的轨道宽度和可变的Ri最优值和现在对应于两种轨道的轨道宽度的变量Ri。然后，将变量Ri最优值和变量Ri之间的偏差调整为小于期望值。

3. 发明申请

US20070064336A1 Method of adjusting magnetic head of magnetic tape recording and reproducing apparatus and magnetic tape recording and reproducing apparatus 失效
标题翻译：磁带记录再现装置的磁头调整方法以及磁带录放装置
公开(公告)号：US20070064336A1
公开(公告)日：2007-03-22
申请号：US11519398
申请日：2006-09-11
申请人： Hisato Hirasaka , Toshiaki Wakita
发明人： Hisato Hirasaka , Toshiaki Wakita
IPC分类号： G11B5/584 , G11B5/03 , G11B15/14
CPC分类号： G11B5/00839 , G11B5/588
摘要： Processing wherein a measurement signal and an erasure signal are recorded on adjacent tracks of a recordable tape 10 by one recording head HWi of n (i=1 to n) recording heads is effected on n recording heads, and measurement signals are recorded on n tracks substantially simultaneously by n recording heads HW1 to HWn in standard operation state. Then, reproducing heads with respect to thus obtained two kinds of tracks are displaced in track width directions, characteristic curves of reproduced signal waveform amplitudes of measurement signals displacement (off-track) amounts of tracks are obtained, half widths of these characteristic curves are assumed to be expedient track width and a variable Ri optimum and a variable Ri now corresponding to track widths of two kinds of tracks are obtained. Then, deviation between the variable Ri optimum and the variable Ri now is adjusted to become smaller than a desired value.
摘要翻译：在n个记录头上实现由n（i = 1〜n）个记录头的一个记录头HWi将测量信号和擦除信号记录在可记录磁带10的相邻轨道上的处理，并将测量信号记录在n个磁迹基本上同时由n个记录头HW 1至HWn在标准操作状态。然后，对于这样获得的两种轨道的再现头在轨道宽度方向上移位，获得测量信号位移（偏离轨迹）轨道数的再现信号波形幅度的特性曲线，假设这些特性曲线的半宽度获得有利的轨道宽度和可变的Ri最优值和现在对应于两种轨道的轨道宽度的变量Ri。然后，将变量Ri最优值和变量Ri之间的偏差调整为小于期望值。

4. 发明授权

US07420758B2 Head system, recording and reproduction system, and magnetic recording method 失效
标题翻译：头系统，记录和再现系统以及磁记录方法
公开(公告)号：US07420758B2
公开(公告)日：2008-09-02
申请号：US10750820
申请日：2004-01-05
申请人： Yasutoshi Inoue , Hiroaki Hida , Toshiaki Wakita , Tetsuro Makise , Ichiro Hashimoto
发明人： Yasutoshi Inoue , Hiroaki Hida , Toshiaki Wakita , Tetsuro Makise , Ichiro Hashimoto
IPC分类号： G11B5/02
CPC分类号： G11B15/14 , G11B5/00813 , G11B5/0086 , G11B5/23 , G11B5/29 , G11B5/3103 , G11B5/4893 , G11B5/4907 , G11B5/534 , G11B5/584
摘要： Disclosed is a head system including a plurality of recording heads for azimuth recording. The system includes a first recording head having a plurality of magnetic gaps having a first azimuth angle, and a second recording head having a plurality of magnetic gaps having a second azimuth angle different from the first azimuth angle. After first magnetization patterns are formed on a recording medium by the first recording head, second magnetization patterns are formed by overwriting side edge portions in the formation direction of the first magnetization patterns by the second recording head. This makes it possible to prevent the worsening of the accuracy of the magnetization pattern width due to a relative height stagger (offset) between the heads, to thereby enhance the accuracy of the magnetization pattern width, and to achieve high-density recording.
摘要翻译：公开了一种包括用于方位记录的多个记录头的头系统。该系统包括具有第一方位角的多个磁隙的第一记录头和具有不同于第一方位角的第二方位角的多个磁隙的第二记录头。在通过第一记录头在记录介质上形成第一磁化图案之后，通过用第二记录头在第一磁化图案的形成方向上覆盖侧边缘部分来形成第二磁化模式。这使得可以防止由于磁头之间的相对高度交错（偏移）引起的磁化模式宽度的精度的恶化，从而提高磁化模式宽度的精度，并实现高密度记录。

5. 发明授权

US4270116A High speed data logical comparison device 失效
标题翻译：高速数据逻辑比较装置
公开(公告)号：US4270116A
公开(公告)日：1981-05-26
申请号：US69347
申请日：1979-08-24
申请人： Yoshichika Ichimiya , Tsuneta Sudo , Hiromi Maruyama , Shigeru Sugamori , Susumu Sumida , Masao Shimizu , Toshiaki Wakita
发明人： Yoshichika Ichimiya , Tsuneta Sudo , Hiromi Maruyama , Shigeru Sugamori , Susumu Sumida , Masao Shimizu , Toshiaki Wakita
IPC分类号： G01R31/28 , G06F7/02 , G06F7/04 , G06F11/22
CPC分类号： G06F7/02
摘要： Reference logical data is spatially divided by a data dividing circuit for each time slot, and the divided data are converted into data, each having a continuous effective period. The divided and converted reference data and input logical data are compared by comparators to detect whether or not they are coincident with each other. A clock signal for determining the timing of comparison is also divided by a clock signal dividing circuit into n clock signals which are displaced one time slot apart in phase and occurring with a period of n time slots. By these divided clock signals those of the outputs from the comparators corresponding thereto are taken out from a comparison output circuit.
摘要翻译：参考逻辑数据由每个时隙的数据分割电路在空间上划分，并且分割的数据被转换成数据，每个数据具有连续的有效周期。通过比较器比较分割和转换的参考数据和输入逻辑数据，以检测它们是否彼此一致。用于确定比较定时的时钟信号也被时钟信号分频电路划分为n个时钟信号，这些n个时钟信号相移一个时隙并且以n个时隙的周期发生。通过这些分开的时钟信号，从比较输出电路中取出与其相对应的比较器的输出。

6. 发明授权

US5481413A Magnetic recording and reproducing apparatus for a helical-scan system adapted for reproduction of data in a reverse sequential order from recording of data 失效
标题翻译：用于螺旋扫描系统的磁记录和再现装置，适于从数据记录中以相反的顺序再现数据
公开(公告)号：US5481413A
公开(公告)日：1996-01-02
申请号：US436833
申请日：1995-05-08
申请人： Hideaki Kawada , Toshiaki Wakita
发明人： Hideaki Kawada , Toshiaki Wakita
IPC分类号： G11B5/008 , G11B15/18 , G11B20/18 , G11B27/00 , G11B5/09
CPC分类号： G11B15/1875 , G11B20/1833 , G11B27/005 , G11B5/0086 , G11B2220/90
摘要： A device that records and reproduces data using a tape driver and a tape guide drum with an angled rotary magnetic head for forming helical slant tracks for high density recording provides reverse data reproduction and synchronization, regardless of the helical-scanning system used for recording and reproduction, and accommodates error correction codes, to rapidly and accurately reproduce data at various speeds, formats, and error correction codes. The tape guide drum can rotate in both forward and reverse, so that access time is minimized because the tape needs no rewinding prior to playback. The capabilities of reverse direction playback, of handling data other than video data, and of reproducing data at arbitrary speeds provide flexibility for many applications, including a satellite's requirements for rapid, variable-speed playback and transmission of high-density, non-video data.
摘要翻译：使用带驱动器和具有倾斜旋转磁头的带导向滚筒记录和再现数据的装置，用于形成用于高密度记录的螺旋倾斜轨道，提供反向数据再现和同步，而与用于记录和再现的螺旋扫描系统无关并且容纳纠错码，以快速且准确地再现各种速度，格式和纠错码的数据。磁带引导鼓可以向前和向后旋转，使得访问时间最小化，因为磁带在播放之前不需要倒带。逆向播放，处理视频数据以外的数据以及以任意速度再现数据的能力为许多应用提供了灵活性，包括卫星对快速，可变速度播放和传输高密度非视频数据的要求。

7. 发明授权

US4559523A Analog to digital converter 失效
标题翻译：模数转换器
公开(公告)号：US4559523A
公开(公告)日：1985-12-17
申请号：US437213
申请日：1982-10-28
申请人： Toshiaki Wakita
发明人： Toshiaki Wakita
IPC分类号： H03M1/14 , H03M1/00 , H03K13/02
CPC分类号： H03M1/38
摘要： An analog to digital converter is disclosed, in which an analog input voltage is converted by a first analog to digital converter to a digital signal of m-bits, the digital signal is code-converted to a digital signal, this code-converted digital signal is converted by a digital to analog converter to an analog voltage, the difference between the last analog voltage and the above analog input voltage is converted by a second analog to digital converter to a digital signal of n-bits, and this digital signal of n-bits and the above code-converted digital signal are added to each other to provide a digital signal of (m+n) bits which corresponds to the analog input voltage.
摘要翻译：公开了一种模数转换器，其中模拟输入电压由第一模数转换器转换成m位的数字信号，数字信号被码转换为数字信号，该代码转换的数字信号由数模转换器转换为模拟电压，最后一个模拟电压与上述模拟输入电压之差由第二模数转换器转换为n位数字信号，该数字信号为n 并将上述代码转换的数字信号彼此相加以提供对应于模拟输入电压的（m + n）位的数字信号。

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