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1. 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。

2. 发明授权

US6134691A NLTS correction circuit 失效
标题翻译： NLTS校正电路
公开(公告)号：US6134691A
公开(公告)日：2000-10-17
申请号：US258252
申请日：1999-02-25
申请人： Hisato Hirasaka
发明人： Hisato Hirasaka
IPC分类号： G11B5/09 , G11B20/10 , G11B20/18 , G11B27/36 , G01R31/28 , G06F11/00
CPC分类号： G11B20/10009 , G11B20/1816 , G11B27/36 , G11B2220/20
摘要： An NLTS (non-linear transition shift) correction circuit for hard disk drives improves flexibility in modifying algorithm of the data pattern analysis utilized therein and NLTS correction precision thereof. The NLTS correction circuit of the present invention uses a data pattern analyzer including a CPU and a data pattern analysis program. Selector control signals produced by this analyzer are stored in a selector control signal buffer memory and are output to a selector in synchronization with the output from a data buffer memory. The pattern of data to be recorded can be analyzed while flexibly responding to the fluctuations in the characteristic of the recording medium by modifying the analyzing program. Moreover, the difference in the amount of delay between the delay lines can be calibrated by adding a circuit for calibrating the NLTS correction value, which includes a circuit that converts the duty cycle of the record data signal to voltage value. The circuit realizes the improved precision of the NLTS correction circuit.
摘要翻译：用于硬盘驱动器的NLTS（非线性转变移位）校正电路提高了在其中使用的数据模式分析的修改算法和NLTS校正精度的灵活性。本发明的NLTS校正电路使用包括CPU和数据模式分析程序的数据模式分析器。由该分析器产生的选择器控制信号存储在选择器控制信号缓冲存储器中，并与数据缓冲存储器的输出同步输出到选择器。可以通过修改分析程序来灵活地响应于记录介质的特性的波动来分析要记录的数据的模式。此外，可以通过添加用于校准NLTS校正值的电路来校准延迟线之间的延迟量的差异，该电路包括将记录数据信号的占空比转换为电压值的电路。该电路实现了NLTS校正电路的精度提高。

3. 发明授权

US6124997A Data reproducing apparatus equipped with adaptive processing circuit 失效
标题翻译：配备有自适应处理电路的数据再现装置
公开(公告)号：US6124997A
公开(公告)日：2000-09-26
申请号：US810297
申请日：1997-03-03
申请人： Hisato Hirasaka
发明人： Hisato Hirasaka
IPC分类号： G11B5/09 , G11B5/00 , G11B5/008 , G11B5/035 , G11B15/05 , G11B20/10 , H04L1/00 , H04L25/03 , H03H7/30
CPC分类号： H04L1/0047 , G11B20/10009 , G11B5/0086 , G11B5/035 , H04L25/03038 , G11B15/05 , G11B2005/001
摘要： In a data reproducing apparatus compatibility among plural recording media can be improved. In the data reproducing apparatus, the latest tap coefficient is stored as a tap coefficient in a transversal filter during the normal reproducing operation. This latest tap coefficient is used as an initial value during next reproducing operation. Accordingly, a capture operation for the reproducing operation can be quickly executed. Thus, even when a plurality of recording media are replaced and reproduced in this data reproducing apparatus, a difference between the characteristics of the recording media can be absorbed.
摘要翻译：在数据再现装置中，可以提高多个记录介质之间的兼容性。在数据再现装置中，在正常再现操作期间，最新抽头系数作为抽头系数存储在横向滤波器中。这种最新的抽头系数在下次再现操作期间用作初始值。因此，可以快速执行用于再现操作的捕获操作。因此，即使当在该数据再现装置中替换和再现多个记录介质时，可以吸收记录介质的特性之间的差异。

4. 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。

5. 发明授权

US06996168B2 Signal-processing circuit, and recording and playback apparatus employing the same 失效
标题翻译：信号处理电路，以及采用该电路的记录和重放装置
公开(公告)号：US06996168B2
公开(公告)日：2006-02-07
申请号：US09992606
申请日：2001-11-14
申请人： Hisato Hirasaka
发明人： Hisato Hirasaka
IPC分类号： H03H7/30 , H03D3/24 , G06F17/15
CPC分类号： G11B20/10425 , G11B20/10009 , G11B20/10037 , G11B20/10046 , G11B2220/916
摘要： A signal-processing circuit in which two-stage equalization is performed by using first and second equalization circuits provided on upstream and downstream sides from a phase-locked loop circuit, respectively, the first equalization circuit on the upstream side including a transversal filter to minimize an equalization error caused by the first equalization circuit and to stabilize the operation of the phase-locked loop circuit. Another signal-processing circuit including an analog-to-digital converter and a digital phase-locked loop circuit for receiving the output from the analog-to-digital converter and a recording and playback apparatus using the output are also provided, wherein the output from the analog-to-digital converter is input as the digital signal in the digital phase-locked loop circuit to fetch a detection point voltage and to stabilize the phase-locked loop circuit without an analog circuit.
摘要翻译：一种信号处理电路，其中通过使用分别从锁相环电路在上游侧和下游侧设置的第一和第二均衡电路来执行两级均衡，所述上游侧的第一均衡电路包括横向滤波器以最小化由第一均衡电路引起的均衡误差并且稳定锁相环电路的操作。还提供了包括模拟 - 数字转换器和数字锁相环电路的信号处理电路，用于接收来自模拟 - 数字转换器的输出和使用该输出的记录和重放装置，其中，模数转换器作为数字锁相环电路中的数字信号输入，以提取检测点电压，并在没有模拟电路的情况下稳定锁相环电路。

6. 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。

7. 发明申请

US20090158125A1 RECORDING/REPRODUCING APPARATUS AND RECORDING/REPRODUCING METHOD 失效
标题翻译：记录/再现装置和记录/再现方法
公开(公告)号：US20090158125A1
公开(公告)日：2009-06-18
申请号：US12270004
申请日：2008-11-13
申请人： Tsutomu HARADA , Yoshihiko DEOKA , Hisato HIRASAKA , Toshihiko HIROSE , Toshiyuki HIROSE , Osamu NAKAMURA , Akira ITOU
发明人： Tsutomu HARADA , Yoshihiko DEOKA , Hisato HIRASAKA , Toshihiko HIROSE , Toshiyuki HIROSE , Osamu NAKAMURA , Akira ITOU
IPC分类号： G11C29/52 , G06F11/10
CPC分类号： G11B20/1879 , G11B20/1833 , G11B2020/1823 , G11B2020/183 , G11B2020/185 , G11B2220/91 , H03M13/1128
摘要： A recording/reproducing apparatus includes an encoding section, a decoding section, and a first judging section. The encoding section is configured to encode data that is to be recorded onto a recording medium into an LDPC (Low Density Parity Check) code. The decoding section is configured to decode the LDPC code read out from the recording medium. The judging section is configured to judge a block with a recording error based on one of a block error flag and an iterative decoding count output from the decoding section.
摘要翻译：记录/再现装置包括编码部分，解码部分和第一判断部分。编码部被配置为将要记录到记录介质上的数据编码为LDPC（低密度奇偶校验）码。解码部分被配置为对从记录介质读出的LDPC码进行解码。该判定部根据从解码部输出的块错误标志和迭代解码计数中的一个来判断具有记录错误的块。

8. 发明授权

US09300145B2 Wireless power transmission apparatus 有权
标题翻译：无线电力传输装置
公开(公告)号：US09300145B2
公开(公告)日：2016-03-29
申请号：US13016582
申请日：2011-01-28
申请人： Hisato Hirasaka , Toshiyuki Hirose , Toshihiko Hirose , Tetsuro Makise , Akira Itou
发明人： Hisato Hirasaka , Toshiyuki Hirose , Toshihiko Hirose , Tetsuro Makise , Akira Itou
IPC分类号： H01F27/42 , H02J5/00 , H02J17/00 , H04K1/10 , H04L29/06
CPC分类号： H02J50/10 , H02J5/005 , H02J17/00 , H02J50/12 , H02J50/80 , H04K1/10 , H04L63/0442 , H04L63/083 , H04W12/06 , Y04S40/24
摘要： A wireless power transmission apparatus includes: a transmitter that wirelessly transmits electric power; and a receiver that can receive, in a resonant relation with the transmitter, a transmission signal including the electric power transmitted from the transmitter, wherein the receiver includes a frequency variable unit that can change a reception resonant frequency; a detecting unit that detects reception power; and a control unit that controls the frequency variable unit to perform frequency adjustment such that the reception power detected by the detecting unit is maximized.
摘要翻译：无线电力传输装置包括：无线发射电力的发射机; 以及接收器，其可以与所述发射机以共振关系接收包括从所述发射机发送的电力的发送信号，其中所述接收机包括可以改变接收谐振频率的频率可变单元; 检测单元，检测接收功率; 以及控制单元，其控制所述频率可变单元进行频率调整，使得由所述检测单元检测到的接收功率最大化。

9. 发明授权

US07372791B2 Recording/reproducing apparatus and cross talk cancel method 失效
标题翻译：记录/再现装置和串音取消方法
公开(公告)号：US07372791B2
公开(公告)日：2008-05-13
申请号：US10500092
申请日：2002-12-26
申请人： Hisato Hirasaka
发明人： Hisato Hirasaka
IPC分类号： G11B5/09 , G11B15/52
CPC分类号： G11B20/1879 , G11B5/0086 , G11B5/00865 , G11B5/02 , G11B7/00 , G11B20/22 , G11B2005/001
摘要： The present invention is directed to a recording/reproducing apparatus having a Read After Write function which simultaneously performs recording operation and reproduction operation, and is such that, in a reproducing system (120) of a tape streamer (100) which performs Read After Write operation for signals through a magnetic tape (105), the apparatus serves to distribute reproduction signals obtained from the magnetic tape by a first data distribution switch (133) to store signals thus distributed into frame memories (135A), (135B) of 2 channels, and to distribute a recording signal from a recording system (110) by a second data distribution switch (134) as cause signals of crosstalk signals included in reproduction signals to store signals thus distributed into frame memories to generate pseudo crosstalk signals of respective channels by crosstalk cancellers (136A), (136B) on the basis of reproduction signals and cause signals of respective channels which are read out from the frame memories to cancel, every channel, crosstalk signals included in reproduction signals of respective channels.
摘要翻译：本发明涉及具有同时执行记录操作和再现操作的读写功能的记录/再现装置，并且是在执行写后读取的磁带机（100）的再现系统（120）中，通过磁带（105）对信号进行操作，该装置用于分配由第一数据分配开关（133）从磁带获得的再现信号，以将如此分配的信号存储到帧存储器（135A），（135B）的 2通道，并且通过第二数据分配开关（134）将来自记录系统（110）的记录信号作为引起再现信号中包括的串扰信号的信号，以将如此分配的信号存储在帧存储器中，以产生相应的模拟串扰信号基于再现信号的串扰消除器（136A），（136B）的通道，并且导致各个通道的信号从帧存储器中删除每个通道，包括在各个通道的再现信号中的串扰信号。

10. 发明授权

US6127869A Circuit for calibrating delay lines and method 失效
标题翻译：延迟线校准电路及方法
公开(公告)号：US6127869A
公开(公告)日：2000-10-03
申请号：US258253
申请日：1999-02-25
申请人： Hisato Hirasaka
发明人： Hisato Hirasaka
IPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B20/10 , G11B27/36 , G11B33/10 , H03K5/13 , G01F1/66
CPC分类号： H03K5/131 , G11B20/10009 , G11B27/36 , G11B2005/001 , G11B33/10 , G11B5/012 , G11B5/09
摘要： A circuit for calibration of the NLTS correction value provided for the NLTS correction circuit to realize its high precision of the amount of the NLTS correction. The circuit for calibrating the NLTS correction value of the present invention comprises a duty cycle-voltage converter (D/V converter) for receiving the output signals of the NLTS correction circuit and converting the duty cycle of the signals to voltage values, an A/D converter for converting the analog output from the D/V converter to digital values, and an delay line control device for controlling the amount of delay of each delay line in accordance with the output of the A/D converter. To providing the circuit for calibrating the NLTS correction value of the present invention for the NLTS correction circuit, the amount of delay of the delay lines is required to be controllable with the delay line control device. Additionally, by providing a frequency spectrum analyzer for analyzing frequency spectrum of the output from the recording amplifier, the calibration of the amount of the NLTS correction including the output from the recording amplifier is realized.
摘要翻译：用于校准针对NLTS校正电路的NLTS校正值的电路，以实现其对NLTS校正量的高精度。用于校准本发明的NLTS校正值的电路包括用于接收NLTS校正电路的输出信号并将该信号的占空比转换为电压值的占空比电压转换器（D / V转换器），A / D转换器，用于将来自D / V转换器的模拟输出转换为数字值;以及延迟线控制装置，用于根据A / D转换器的输出来控制每个延迟线的延迟量。为了提供用于校准NLTS校正电路的本发明的NLTS校正值的电路，延迟线的延迟量需要通过延迟线控制装置来控制。此外，通过提供用于分析来自记录放大器的输出的频谱的频谱分析仪，实现了包括来自记录放大器的输出的NLTS校正量的校准。

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