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1. 发明授权

US5432820A Maximum-likelihood decoding method and device 失效
标题翻译：最大似然解码方法和装置
公开(公告)号：US5432820A
公开(公告)日：1995-07-11
申请号：US910311
申请日：1993-07-26
申请人： Takao Sugawara , Yoshifumi Mizoshita , Takashi Aikawa , Hiroshi Mutoh , Kiichirou Kasai
发明人： Takao Sugawara , Yoshifumi Mizoshita , Takashi Aikawa , Hiroshi Mutoh , Kiichirou Kasai
IPC分类号： H03M13/39 , H03D1/00 , H04L27/06
CPC分类号： H03M13/39
摘要： A maximum-likelihood decoding method for decoding an input signal subject to intersymbol interference. An assumption is made of a measure of an interference caused by a future signal that is later in a sequence than an assumed data sequence, on the basis of a predetermined bits of sample values of said input signal that are earlier in a sequence than an assumed data sequence stored in an assumed path memory (104). An assumed sample value of said input signal by referring to this measure of interference. Maximum-likelihood decoding is conducted on said input signal, on the basis of this assumed sample value and a sample value of said input signal; a plurality of survivor paths are generated and stored in a path memory (102); data for the most likely one of survivor paths is output as a decoded data sequence.
摘要翻译： PCT No.PCT / JP91 / 01579 Sec。 371日期：1993年7月26日 102（e）日期1993年7月26日PCT 1991年11月19日PCT PCT。出版物WO92 / 09144 日期：1992年5月29日。用于解码符号间干扰的输入信号的最大似然解码方法。基于序列中比预期的序列更早的所述输入信号的采样值的预定比特，假定由比未被假定的数据序列晚于序列的未来信号引起的干扰的度量存储在假定路径存储器（104）中的数据序列。通过参考这种干扰措施，假定所述输入信号的采样值。基于该假设采样值和所述输入信号的采样值对所述输入信号进行最大似然解码; 多个幸存路径被生成并存储在路径存储器（102）中; 作为解码数据序列输出最可能的幸存路径之一的数据。

2. 发明授权

US5287385A Viterbi decoding system including variable-order equalizer 失效
标题翻译：维特比解码系统，包括可变阶均衡器
公开(公告)号：US5287385A
公开(公告)日：1994-02-15
申请号：US810069
申请日：1991-12-19
申请人： Takao Sugawara , Yoshifumi Mizoshita , Hiroshi Mutoh , Kiichirou Kasai , Takenori Ohshima
发明人： Takao Sugawara , Yoshifumi Mizoshita , Hiroshi Mutoh , Kiichirou Kasai , Takenori Ohshima
IPC分类号： G11B5/09 , G11B20/10 , G11B20/18 , H03M13/23 , H03M13/41 , H03H7/30
CPC分类号： G11B20/10009 , H03M13/41
摘要： A Viterbi decoding system includes a characteristic estimator for estimating a characteristic of a system, and an equalizer for receiving an input signal from the system and for equalizing a waveform of the input signal so that an equalized waveform of the input signal is varied based on the characteristic of the system estimated by the characteristic estimator. A Viterbi decoder generates an output signal showing a maximum-likelihood path by using the equalized waveform of the input signal from the equalizer.
摘要翻译：维特比解码系统包括用于估计系统的特性的特性估计器和用于从系统接收输入信号并用于均衡输入信号的波形的均衡器，使得输入信号的均衡波形基于由特征估计器估计的系统特征。维特比解码器通过使用来自均衡器的输入信号的均衡波形来产生表示最大似然路径的输出信号。

3. 发明授权

US5608592A Head actuator 失效
标题翻译：头执行器
公开(公告)号：US5608592A
公开(公告)日：1997-03-04
申请号：US462751
申请日：1995-06-05
申请人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekewa , Shinji Koganezawa , Keiji Aruga
发明人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekewa , Shinji Koganezawa , Keiji Aruga
IPC分类号： G11B21/12 , G11B25/04 , H02K7/04 , H02K7/08 , H02K21/24 , H02K41/035 , G11B21/22 , G11B5/54
CPC分类号： G11B21/12 , G11B25/043 , H02K21/24 , H02K41/0358 , H02K7/04 , H02K7/086
摘要： A retracting assembly produces a constant torque, in a data zone of a magnetic disk, which is greater than static friction of a bearing for a rotary actuator. However, in a parking zone on an outer portion of the magnetic disk, the retracting assembly generates a torque which suddenly increases so that a large holding torque is obtained and a magnetic head is reliably locked.
摘要翻译：回缩组件在磁盘的数据区域中产生恒定的扭矩，其大于用于旋转致动器的轴承的静摩擦力。然而，在磁盘外部的停车区域中，缩回组件产生突然增加的转矩，从而获得大的保持转矩并且可靠地锁定磁头。

4. 发明授权

US06501610B1 Detecting circuit for read signal from magnetic recording system using partial response 失效
标题翻译：使用部分响应从磁记录系统读取信号的检测电路
公开(公告)号：US06501610B1
公开(公告)日：2002-12-31
申请号：US08596471
申请日：1996-02-05
申请人： Takao Sugawara , Umeo Oshio , Takenori Ohshima , Yoshifumi Mizoshita , Keiji Aruga
发明人： Takao Sugawara , Umeo Oshio , Takenori Ohshima , Yoshifumi Mizoshita , Keiji Aruga
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/09 , G11B20/10009 , G11B20/1258
摘要： A detection circuit in a magnetic recording and playback apparatus which uses partial response and the maximum likelihood method, in which neither the size of the detection circuit nor the power consumption increase when the partial response order n increases. In this detection circuit, in the circuit that detects a signal read out from a head, either a plurality of equalizers for different target equalization waveforms, or a single variable target equalizer is provided. A detector for the waveform output from an equalizer is connected in series with the detector. A plurality of combinations, each formed by an equalizer and a detector, is connected in parallel to the output of a filter, the outputs of the combinations of equalizers and detectors being input to a switching circuit, which is controlled by a switching control means. The switching control means controls the switching circuit so that just one of the combinations of equalizer and detectors is selected as the detector output. If a variable target equalizer, which is capable of generating two or more different types of equalization waveforms, is used as the equalizer, it is possible to reduce the number of equalizers to one.
摘要翻译：使用部分响应和最大似然方法的磁记录和重放装置中的检测电路，其中当部分响应顺序n增加时，检测电路的尺寸和功耗都不会增加。在该检测电路中，在检测从头读出的信号的电路中，提供用于不同的目标均衡波形的多个均衡器或单个可变目标均衡器。用于从均衡器输出的波形的检测器与检测器串联连接。由均衡器和检测器形成的多个组合与滤波器的输出并联连接，均衡器和检测器组合的输出被输入到由开关控制装置控制的开关电路。开关控制装置控制开关电路，使得仅选择均衡器和检测器的组合中的一个作为检测器输出。如果能够产生两种或多种不同类型的均衡波形的可变目标均衡器被用作均衡器，则可以将均衡器的数量减少到1。

5. 发明授权

US5880904A Disk drive having a thickness equal to an IC memory card 失效
标题翻译：磁盘驱动器的厚度等于IC存储卡
公开(公告)号：US5880904A
公开(公告)日：1999-03-09
申请号：US406807
申请日：1995-03-20
申请人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekawa , Shinji Koganezawa , Keiji Aruga
发明人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekawa , Shinji Koganezawa , Keiji Aruga
IPC分类号： G11B5/54 , G11B17/028 , G11B19/20 , G11B21/12 , G11B21/22 , G11B25/04 , G11B33/08 , G11B33/12 , H02K7/04 , H02K7/08 , H02K21/24 , H02K33/18 , H02K41/035 , G11B5/012
CPC分类号： G11B33/121 , G11B17/028 , G11B17/0282 , G11B17/0287 , G11B19/20 , G11B19/2009 , G11B21/12 , G11B21/22 , G11B25/043 , G11B33/08 , G11B33/122 , G11B5/54 , H02K21/24 , H02K33/18 , H02K41/0358 , H02K7/04 , H02K7/086
摘要： A compact card type disk drive includes a housing (21) for accommodating a disk for storing data, disk drive for rotating the disk, a head assembly for writing and reading data to and from the disk and an electronic circuit including at least an interface circuit (39), the latter three being accommodated in the housing. A connector (42) connected to the electronic circuit is fixed to the outside portion of the housing (21). The electronic circuit preferably contains a read/write circuit (36) and a control circuit (38). The housing (21) preferably includes a lower base (22) and an upper cover (23), and a printed circuit board (14) is disposed along the inner wall of either one, or both, of the base (22) and the cover (23). The outer dimension of the plane of the disk drive is preferably about 85.6 mm.times.54 mm, and typically, the outer thickness is 5 mm. Preferably, one connector (42) is disposed on either one of the minor sides of the housing (21). The connector (42) is disposed at the substantial center of the housing in the direction of its thickness and is fixed to one of the minor sides of the housing (21) which opposes the head assembly with respect to the disk.
摘要翻译：一种紧凑型卡式磁盘驱动器包括用于容纳用于存储数据的盘的壳体（21），用于旋转盘的盘驱动器，用于向盘进行数据读取和从盘读取数据的头组件和至少包括接口电路（39），后三个被安置在房屋内。连接到电子电路的连接器（42）固定到壳体（21）的外部。电子电路优选地包含读/写电路（36）和控制电路（38）。壳体（21）优选地包括下基部（22）和上盖（23），并且印刷电路板（14）沿着基座（22）的一个或两个的内壁设置，并且盖（23）。磁盘驱动器的平面的外部尺寸优选为约85.6mm×54mm，并且通常外部厚度为5mm。优选地，一个连接器（42）设置在壳体（21）的任一个次侧上。连接器（42）沿其厚度方向设置在壳体的大致中心处并且被固定到相对于盘相对于头组件的壳体（21）的一个小侧。

6. 发明授权

US6025973A Construction for attaching a disk in a disk drive 有权
标题翻译：将磁盘安装在磁盘驱动器中的结构
公开(公告)号：US6025973A
公开(公告)日：2000-02-15
申请号：US213759
申请日：1998-12-17
申请人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekewa , Shinji Koganezawa , Keiji Aruga
发明人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekewa , Shinji Koganezawa , Keiji Aruga
IPC分类号： G11B5/54 , G11B17/028 , G11B19/20 , G11B21/12 , G11B21/22 , G11B25/04 , G11B33/08 , G11B33/12 , H02K7/04 , H02K7/08 , H02K21/24 , H02K33/18 , H02K41/035 , G11B17/02 , G11B23/00
CPC分类号： G11B33/121 , G11B17/028 , G11B17/0282 , G11B17/0287 , G11B19/20 , G11B19/2009 , G11B21/12 , G11B21/22 , G11B25/043 , G11B33/08 , G11B33/122 , G11B5/54 , H02K21/24 , H02K33/18 , H02K41/0358 , H02K7/04 , H02K7/086
摘要： A compact card type disk drive includes a housing (21) for accommodating a disk for storing data, a disk drive for rotating the disk, a head assembly for writing and reading data to and from the disk and an electronic circuit including at least an interface circuit (39), the latter three being accommodated in the housing. A connector (42) connected to the electronic circuit is fixed to the outside portion of the housing (21). The electronic circuit preferably contains a read/write circuit (36) and a control circuit (38). The housing (21) preferably includes a lower base (22) and an upper cover (23), and a printed circuit board (14) is disposed along the inner wall of either one, or both, of the base (22) and the cover (23). The outer dimension of the plane of the disk drive is preferably about 85.6 mm.times.54 mm, and typically, the outer thickness is 5 mm. Preferably, one connector (42) is disposed on either one of the minor sides of the housing (21). The connector (42) is disposed at the substantial center of the housing in the direction of its thickness and is fixed to one of the minor sides of the housing (21) which opposes the head assembly with respect to the disk.
摘要翻译：一种紧凑型卡式磁盘驱动器包括用于容纳用于存储数据的磁盘的壳体（21），用于旋转磁盘的磁盘驱动器，用于向磁盘写入和读取数据的磁头组件以及至少包括接口电路（39），后者三个被容纳在壳体中。连接到电子电路的连接器（42）固定到壳体（21）的外部。电子电路优选地包含读/写电路（36）和控制电路（38）。壳体（21）优选地包括下基部（22）和上盖（23），并且印刷电路板（14）沿着基座（22）的一个或两个的内壁设置，并且盖（23）。磁盘驱动器的平面的外部尺寸优选为约85.6mm×54mm，并且通常外部厚度为5mm。优选地，一个连接器（42）设置在壳体（21）的任一个次侧上。连接器（42）沿其厚度方向设置在壳体的大致中心处并且被固定到相对于盘相对于头组件的壳体（21）的一个小侧。

7. 发明授权

US6016237A Shaft construction of a disk drive 失效
标题翻译：轴构造磁盘驱动器
公开(公告)号：US6016237A
公开(公告)日：2000-01-18
申请号：US139765
申请日：1998-08-25
申请人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekewa , Shinji Koganezawa , Keiji Aruga
发明人： Yoshifumi Mizoshita , Tomoyoshi Yamada , Yasumasa Kuroba , Toru Kouhei , Takao Sugawara , Masaru Matsumoto , Hiroyuki Mase , Masao Tsunekewa , Shinji Koganezawa , Keiji Aruga
IPC分类号： G11B5/54 , G11B17/028 , G11B19/20 , G11B21/12 , G11B21/22 , G11B25/04 , G11B33/08 , G11B33/12 , H02K7/04 , H02K7/08 , H02K21/24 , H02K33/18 , H02K41/035 , G11B33/02
CPC分类号： G11B33/121 , G11B17/028 , G11B17/0282 , G11B17/0287 , G11B19/20 , G11B19/2009 , G11B21/12 , G11B21/22 , G11B25/043 , G11B33/08 , G11B33/122 , G11B5/54 , H02K21/24 , H02K33/18 , H02K41/0358 , H02K7/04 , H02K7/086
摘要： A compact card type disk a drive includes a housing (21) for accommodating a disk for storing data, a disk drive for rotating the disk, head assembly for writing and reading data to and from the disk and an electronic circuit including at least an interface circuit (39), the latter three being accommodated in the housing. A connector (42) connected to the electronic circuit is fixed to the outside portion of the housing (21). The electronic circuit preferably contains a read/write circuit (36) and a control circuit (38). The housing (21) preferably includes a lower base (22) and an upper cover (23), and a printed circuit board (14) is disposed along the inner wall of either one, or both, of the base (22) and the cover (23). The outer dimension of the plane of the disk drive is preferably about 85.6 mm.times.54 mm, and typically, the outer thickness is 5 mm. Preferably, one connector (42) is disposed on either one of the minor sides of the housing (21). The connector (42) is disposed at the substantial center of the housing in the direction of its thickness and is fixed to one of the minor sides of the housing (21) which opposes the head assembly with respect to the disk.
摘要翻译：一种紧凑型卡式盘，驱动器包括用于容纳用于存储数据的盘的壳体（21），用于旋转盘的盘驱动器，用于向和从盘读取数据的头组件和至少包括界面的电子电路电路（39），后者三个被容纳在外壳中。连接到电子电路的连接器（42）固定到壳体（21）的外部。电子电路优选地包含读/写电路（36）和控制电路（38）。壳体（21）优选地包括下基部（22）和上盖（23），并且印刷电路板（14）沿着基座（22）的一个或两个的内壁设置，并且盖（23）。磁盘驱动器的平面的外部尺寸优选为约85.6mm×54mm，并且通常外部厚度为5mm。优选地，一个连接器（42）设置在壳体（21）的任一个次侧上。连接器（42）沿其厚度方向设置在壳体的大致中心处并且被固定到相对于盘相对于头组件的壳体（21）的一个小侧。

8. 发明授权

US07054088B2 Information recording and reproducing apparatus and method, and signal decoding circuit for performing timing recovery 失效
公开(公告)号：US07054088B2
公开(公告)日：2006-05-30
申请号：US10273485
申请日：2002-10-18
申请人： Akihiro Yamazaki , Takao Sugawara , Motomu Takatsu , Masaru Sawada
发明人： Akihiro Yamazaki , Takao Sugawara , Motomu Takatsu , Masaru Sawada
IPC分类号： G11B5/35
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/18
摘要： A timing recovery unit detects a phase offset and a frequency offset from a head area of reproduction data and initially corrects them. The timing recovery unit stores data in which a head reproduction signal has been made to be discrete by a fixed clock into a buffer. A phase offset detector detects the phase offset from the data head area in parallel with the operation for writing the data into the buffer. At the same time, a frequency offset detector detects the frequency offset from the data head area in parallel with the operation for writing the data into the buffer. A correction value of the detected phase offset and a correction value of the detected frequency offset are initially set into a digital PLL. While the data is read out from the buffer, a frequency lead-in and a phase lead-in are executed in the head area.

9. 发明申请

US20050066261A1 Method, apparatus, and circuit for record reproduction 有权
标题翻译：用于记录再现的方法，装置和电路
公开(公告)号：US20050066261A1
公开(公告)日：2005-03-24
申请号：US10869585
申请日：2004-06-16
申请人： Toshihiko Morita , Mitsuhiko Ohta , Takao Sugawara
发明人： Toshihiko Morita , Mitsuhiko Ohta , Takao Sugawara
IPC分类号： G06F11/08 , G06F11/10 , G11B20/14 , G11B20/18 , H03M7/14 , H03M13/00 , H03M13/09 , H03M13/11 , H03M13/17 , H03M13/19
CPC分类号： H03M13/6325 , G11B20/1833 , G11B20/1866 , G11B2020/1863 , H03M13/1102 , H03M13/1515 , H03M13/17 , H03M13/3746
摘要： A record reproduction apparatus includes an encoding unit that encodes sector data to be written into a recording medium, by dividing the data into a predetermined number of blocks, and an iterative decoding unit that iteratively decodes the sector data read from the recording medium, by dividing the sector data into the predetermined number of blocks.
摘要翻译：记录重放装置包括编码单元，其通过将数据划分成预定数量的块来编码要写入记录介质的扇区数据，以及迭代解码单元，其对从记录介质读取的扇区数据进行迭代解码，将扇区数据转换成预定数量的块。

10. 发明授权

US06532122B1 Data storage apparatus and magnetic recording method 失效
标题翻译：数据存储装置和磁记录方法
公开(公告)号：US06532122B1
公开(公告)日：2003-03-11
申请号：US09493791
申请日：2000-01-28
申请人： Takao Sugawara , Shin Tomimoto
发明人： Takao Sugawara , Shin Tomimoto
IPC分类号： G11B2018
CPC分类号： G11B20/1403 , G11B20/10009 , G11B20/1426 , H03M5/14
摘要： A data storage apparatus for magnetic recording and regeneration on a medium. Only in case of a dibit or Tri-bit code sequence in MTR codes having a restricted number of magnetic transition consecutive, a write unit records the interval of the magnetic transition on the medium with an extension of &Dgr;T relative to the original magnetic transition interval. For the maximum likelihood detection after equalization of the medium read signals, a read unit adds to an expected value of the maximum likelihood detection an amplitude error &Dgr;V arising from the extension record of the magnetic transition interval relative to the original magnetic transition interval. A parameter regulation unit regulates and sets &Dgr;T and &Dgr;V by use of test patterns.
摘要翻译：一种用于在介质上进行磁记录和再生的数据存储装置。写入单元仅在具有有限数量的磁转移连续的MTR代码中的双位或三位代码序列的情况下记录介质上的相对于原始磁过渡间隔延伸DELTAT的介质上的间隔。为了在均衡媒体读取信号之后的最大似然检测，读取单元将最大似然检测的期望值与磁转移间隔相对于原始磁转移间隔的扩展记录产生的振幅误差DELTAV相加。参数调节单元通过使用测试模式来调节和设置DELTAT和DELTAV。

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