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1. 发明授权

US5424890A Magnetoresistance effect type thin film head 失效
标题翻译：磁阻效应型薄膜头
公开(公告)号：US5424890A
公开(公告)日：1995-06-13
申请号：US295229
申请日：1994-08-24
申请人： Hideo Suyama , Tetsuo Sekiya , Munekatsu Fukuyama , Norio Saito , Takuji Shibata
发明人： Hideo Suyama , Tetsuo Sekiya , Munekatsu Fukuyama , Norio Saito , Takuji Shibata
IPC分类号： G11B5/39 , G11B5/40
CPC分类号： G11B5/39 , G11B5/40
摘要： A magnetoresistance effect type thin film head (A) constructed in a manner that a magnetoresistance effect element, that is, an MR element (1) is disposed perpendicularly to a head surface a, and among two electrodes (2a) and (2b) led out from both ends of the MR element (1), the one electrode (2a) is exposed to the head surface a but the other electrode (2b) is not exposed to the head surface a, wherein the one electrode (2a) exposed to the head surface a is connected to a ground voltage Vss, thereby decreasing the change in voltage difference between the electrode (2a) of the MR element (1) and a disc surface b to prevent the electrical breakdown of the thin film head (A).
摘要翻译：以磁致电阻效应元件即MR元件（1）垂直于磁头表面a设置的磁阻效应型薄膜磁头（A），以及在两个电极（2a）和（2b）之间引导的磁阻效应型薄膜磁头从MR元件（1）的两端出来，一个电极（2a）暴露于头表面a，而另一个电极（2b）不暴露于磁头表面a，其中一个电极（2a）暴露于头表面a连接到接地电压Vss，从而减小MR元件（1）的电极（2a）与盘表面b之间的电压差的变化，以防止薄膜头（A）的电击穿，。

2. 发明授权

US4734644A Flux cancelling yoke type magnetic transducer head 失效
标题翻译：磁通消除轭型磁换能器头
公开(公告)号：US4734644A
公开(公告)日：1988-03-29
申请号：US841259
申请日：1986-03-19
申请人： Shigeyoshi Imakoshi , Hideo Suyama , Yutaka Soda , Munekatsu Fukuyama
发明人： Shigeyoshi Imakoshi , Hideo Suyama , Yutaka Soda , Munekatsu Fukuyama
IPC分类号： G01D5/14 , G01D5/16 , G11B5/39 , G01R33/02 , H01L43/00
CPC分类号： G01D5/142 , G11B5/3903
摘要： A yoke type magnetic transducer head utilizing a magnetoresistance effect in which a magnetoresistance effect sensing portion is provided so as to magnetically couple a cut-away portion in a magnetic circuit including an operation gap and a magnetic yoke having in its one portion the cut-away portion and in which a first bias magnetic field is applied to the magnetoresistance effect sensing portion by a first magnetic flux that is generated when a current is flowed through the magnetoresistance effect sensing portion, or when a current is flowed through both the magnetoresistance effect sensing portion and a bias conductor, which includes a hard magnetic layer for generating a second magnetic flux by which a second bias magnetic field is applied to the magnetoresistance effect sensing portion and for passing through the magnetic yoke a magnetic flux which cancels at least a part of the first magnetic flux which passes through the magnetic yoke.
摘要翻译：一种利用磁阻效应的磁轭型磁换能器头，其中磁阻效应感测部分被设置为磁耦合包括操作间隙的磁路中的切除部分和在其一部分中被切除的磁轭并且其中通过在电流流过磁阻效应感测部分时产生的第一磁通量或当电流流过磁阻效应感测部分两者时，第一偏置磁场施加到磁阻效应感测部分以及偏置导体，其包括用于产生第二磁通量的硬磁性层，通过该硬磁性层将第二偏置磁场施加到磁阻效应感测部分，并且通过磁轭，磁通量抵消了至少一部分第一磁通量通过磁轭。

3. 发明授权

US5822159A Thin-film magnetic head, magnetoresistance effect magnetic head and composite magnetic head 失效
标题翻译：薄膜磁头，磁阻效应磁头和复合磁头
公开(公告)号：US5822159A
公开(公告)日：1998-10-13
申请号：US833186
申请日：1997-04-04
申请人： Munekatsu Fukuyama , Yasuo Sasaki , Yutaka Soda , Koji Fukumoto , Tetsuo Sekiya
发明人： Munekatsu Fukuyama , Yasuo Sasaki , Yutaka Soda , Koji Fukumoto , Tetsuo Sekiya
IPC分类号： G11B5/02 , G11B5/31 , G11B5/39 , G11B5/465 , G11B5/33 , G11B5/127
CPC分类号： G11B5/3967 , G11B5/3113 , G11B5/465 , G11B5/02 , G11B5/3906 , G11B5/3912
摘要： A thin-film magnetic head, a magnetoresistance effect magnetic head and an MR inductive head are disclosed. The thin-film magnetic head has one of thin-film magnetic cores stacked on a substrate and formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the thin-film magnetic core in the direction of hard axis thereof. The magnetoresistance effect magnetic head has one of a pair of shield cores having a magnetoresistive element between them formed of two magnetic films and a non-magnetic film held between them, the magnetoresistive element being electrically connected to the shield core, with a sense current flowing through the shield core. The current flowing through the one shield core via the magnetoresistive element is preferably an AC of decrement amplitude for demagnetizing the shield core along with a DC sense current. Also, this current preferably flows in the direction of hard axis of the shield core so that magnetic properties of the shield core are stabilized or demagnetized by the magnetic field generated in the direction of easy axis. The MR inductive head has a second thin-film magnetic core as a common magnetic body of an MR head and an inductive head on one substrate, formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the second thin-film magnetic core in the direction of hard axis thereof.
摘要翻译：公开了一种薄膜磁头，磁阻效应磁头和MR感应头。薄膜磁头具有堆叠在基板上的薄膜磁芯之一，由两个磁性膜和保持在它们之间的非磁性膜形成，电流沿着硬的方向流过薄膜磁芯轴。磁阻效应磁头具有在两个磁膜之间具有磁阻元件的一对屏蔽芯之一和保持在它们之间的非磁性膜之间，磁阻元件电连接到屏蔽芯，感测电流流过通过屏蔽芯。通过磁阻元件流过一个屏蔽芯的电流优选为用于使屏蔽芯与DC感测电流一起消磁的递减幅度的AC。此外，该电流优选沿着屏蔽芯的硬轴的方向流动，使得屏蔽芯的磁性能由容易轴方向产生的磁场稳定或退磁。 MR感应头具有第二薄膜磁芯，作为MR磁头的公共磁体和一个基板上的感应磁头，由两个磁性膜和保持在它们之间的非磁性膜形成，电流流经第二薄膜磁芯在其硬轴方向上。

4. 发明授权

US4703378A Magnetic transducer head utilizing magnetoresistance effect 失效
标题翻译：磁传感器头采用磁阻效应
公开(公告)号：US4703378A
公开(公告)日：1987-10-27
申请号：US705706
申请日：1985-02-26
申请人： Shigeyoshi Imakoshi , Hideo Suyama , Yutaka Soda , Munekatsu Fukuyama , Yasuhiro Iida
发明人： Shigeyoshi Imakoshi , Hideo Suyama , Yutaka Soda , Munekatsu Fukuyama , Yasuhiro Iida
IPC分类号： G11B5/00 , G11B5/02 , G11B5/39 , G11B5/127
CPC分类号： G11B5/02 , G11B5/3903 , G11B2005/0016
摘要： A magnetoresistance effect type magnetic transducer head apparatus comprises a magnetoresistance effect sensing element, means for applying a high-frequency magnetic field to the sensing element, means for taking-out an output signal from the sensing element, a filter for taking-out the high-frequency component of the output, and another filter for rectifying the output and taking-out the low-frequency component. The magnetic head apparatus may be constructed as a digital circuit so that a multi-channel apparatus can be easily implemented.
摘要翻译：磁阻效应型磁换能器头装置包括磁电阻效应感测元件，用于向感测元件施加高频磁场的装置，用于从感测元件取出输出信号的装置，用于取出高频磁场的滤波器输出的频率分量，以及用于整流输出和取出低频分量的另一个滤波器。磁头装置可以构造为数字电路，使得可以容易地实现多通道装置。

5. 发明授权

US5313342A Analog/digital compatible reproducing system 失效
标题翻译：模拟/数字兼容再现系统
公开(公告)号：US5313342A
公开(公告)日：1994-05-17
申请号：US979483
申请日：1992-11-20
申请人： Yutaka Soda , Keisuke Fujiwara , Hiroaki Yada , Satoru Seko , Munekatsu Fukuyama , Tetsuo Sekiya
发明人： Yutaka Soda , Keisuke Fujiwara , Hiroaki Yada , Satoru Seko , Munekatsu Fukuyama , Tetsuo Sekiya
IPC分类号： G11B5/008 , G11B5/48 , G11B15/12 , G11B15/32 , G11B23/087 , G11B23/28 , G11B5/265
CPC分类号： G11B23/087 , G11B15/125 , G11B15/32 , G11B23/28 , G11B5/00878 , G11B5/4893
摘要： An analog/digital compatible reproducing system is disclosed, particularly a stationary head system using a digital recorded magnetic tape having a plurality of n, digital data recorded tracks. An analog recorded magnetic tape has a first analog recorded track and a second analog recorded track between which a guardband of a certain width is provided. Signals are reproduced from the digital recorded magnetic tape by driving n reproducing magnetic head elements respectively corresponding to the n digital data recorded tracks. The analog recorded magnetic tape is reproduced by driving a plurality of m reproducing magnetic head elements of said n reproducing, magnetic head elements, corresponding to the first and second recorded tracks so that common outputs can be produced from the m reproducing magnetic head elements. There is also disclosed a tape cassette used in such system.
摘要翻译：公开了一种模拟/数字兼容再现系统，特别是使用具有多个n个数字数据记录磁道的数字记录磁带的固定磁头系统。模拟记录磁带具有第一模拟记录磁道和第二模拟记录磁道，在其之间提供一定宽度的保护带。通过驱动分别对应于n个数字数据记录轨道的n个再现磁头元件，从数字记录磁带再现信号。通过驱动对应于第一和第二记录磁道的所述n个再现磁头元件的多个m个再现磁头元件来再现模拟记录磁带，使得可以从m个再现磁头元件产生公共输出。还公开了在这种系统中使用的磁带盒。

6. 发明授权

US4691259A Magnetic transducer head utilizing magnetoresistance effect 失效
标题翻译：磁传感器头采用磁阻效应
公开(公告)号：US4691259A
公开(公告)日：1987-09-01
申请号：US769937
申请日：1985-08-27
申请人： Shigeyoshi Imakoshi , Munekatsu Fukuyama , Hideo Suyama , Yutaka Souda
发明人： Shigeyoshi Imakoshi , Munekatsu Fukuyama , Hideo Suyama , Yutaka Souda
IPC分类号： G11B5/03 , G11B5/39 , G11B5/127 , G11B5/02
CPC分类号： G11B5/3903 , G11B5/03 , G11B5/3945
摘要： A magnetoresistance effect type magnetic head apparatus has a magnetoresistance effect sensing element, means for applying a bias magnetic field to the sensing element, a detecting circuit for obtaining a detecting signal, a low pass filter for deriving an unwanted signal component from the detecting signal, and means for applying a cancelling magnetic field to the sensing element so as to eliminate the unwanted signal component. An additional sensing element may also be provided to detect an external magnetic field, and a corresponding signal is generated which is applied to a first sensing element so as to cancel the effects of the external magnetic field.
摘要翻译：磁阻效应型磁头装置具有磁阻效应感测元件，用于向感测元件施加偏置磁场的装置，用于获得检测信号的检测电路，用于从检测信号中导出不需要的信号分量的低通滤波器，以及用于将抵消磁场施加到感测元件以消除不需要的信号分量的装置。还可以提供附加的感测元件来检测外部磁场，并且产生施加到第一感测元件的相应信号，以便消除外部磁场的影响。

7. 发明授权

US5872691A Thin film magnetic head, magnetoresistance effect magnetic head and composite magnetic head 失效
标题翻译：薄膜磁头，磁阻效应磁头和复合磁头
公开(公告)号：US5872691A
公开(公告)日：1999-02-16
申请号：US987652
申请日：1997-12-09
申请人： Munekatsu Fukuyama , Yasuo Sasaki , Yutaka Soda , Koji Fukumoto , Tetsuo Sekiya
发明人： Munekatsu Fukuyama , Yasuo Sasaki , Yutaka Soda , Koji Fukumoto , Tetsuo Sekiya
IPC分类号： G11B5/02 , G11B5/31 , G11B5/39 , G11B5/465
CPC分类号： G11B5/3967 , G11B5/3113 , G11B5/465 , G11B5/02 , G11B5/3906 , G11B5/3912
摘要： A thin-film magnetic head, a magnetoresistance effect magnetic head and an MR inductive head are disclosed. The thin-film magnetic head has one of thin-film magnetic cores stacked on a substrate and formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the thin-film magnetic core in the direction of hard axis thereof. The magnetoresistance effect magnetic head has one of a pair of shield cores having a magnetoresistive element between them formed of two magnetic films and a non-magnetic film held between them, the magnetoresistive element being electrically connected to the shield core, with a sense current flowing through the shield core. The current flowing through the one shield core via the magnetoresistive element is preferably an AC of decrement amplitude for demagnetizing the shield core along with a DC sense current. Also, this current preferably flows in the direction of hard axis of the shield core so that magnetic properties of the shield core are stabilized or demagnetized by the magnetic field generated in the direction of easy axis. The MR inductive head has a second thin-film magnetic core as a common magnetic body of an MR head and an inductive head on one substrate, formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the second thin-film magnetic core in the direction of hard axis thereof.
摘要翻译：公开了一种薄膜磁头，磁阻效应磁头和MR感应头。薄膜磁头具有堆叠在基板上的薄膜磁芯之一，由两个磁性膜和保持在它们之间的非磁性膜形成，电流沿着硬的方向流过薄膜磁芯轴。磁阻效应磁头具有在两个磁膜之间具有磁阻元件的一对屏蔽芯之一和保持在它们之间的非磁性膜之间，磁阻元件电连接到屏蔽芯，感测电流流过通过屏蔽芯。通过磁阻元件流过一个屏蔽芯的电流优选为用于使屏蔽芯与DC感测电流一起消磁的递减幅度的AC。此外，该电流优选沿着屏蔽芯的硬轴的方向流动，使得屏蔽芯的磁性能由容易轴方向产生的磁场稳定或退磁。 MR感应头具有第二薄膜磁芯，作为MR磁头的公共磁体和一个基板上的感应磁头，由两个磁性膜和保持在它们之间的非磁性膜形成，电流流经第二薄膜磁芯在其硬轴方向上。

8. 发明授权

US5260836A Apparatus for reproducing digital and analog audio signals 失效
标题翻译：用于再现数字和模拟音频信号的装置
公开(公告)号：US5260836A
公开(公告)日：1993-11-09
申请号：US618906
申请日：1990-11-28
申请人： Horoaki Yada , Yutaka Soda , Keisuke Fujiwara , Satoru Seko , Munekatsu Fukuyama , Tetsuo Sekiya
发明人： Horoaki Yada , Yutaka Soda , Keisuke Fujiwara , Satoru Seko , Munekatsu Fukuyama , Tetsuo Sekiya
IPC分类号： G11B5/008 , G11B5/02 , G11B20/00 , G11B5/09 , G11B15/12
CPC分类号： G11B5/00878 , G11B20/00 , G11B5/02
摘要： Apparatus is provided for reproducing either M channels of digital audio signals recorded in longitudinal tracks on a record medium or an analog audio signal recorded in one or two stereo tracks. M heads are used to reproduce the M channels of digital audio signals and N of those heads (N.ltoreq.M) are used to reproduce the analog audio signal. The reproduced digital or analog audio signals are multiplexed and digitized. When digital audio signals are reproduced, the digitized multiplexed signals are digitally processed and then converted to analog form. When analog audio signals are reproduced, the digitized multiplexed signals are summed such that signals reproduced by the N heads are combined to form a digital representation of the recorded analog audio signal. The summed signals then are converted to analog form to recover the original analog audio signal.

9. 发明授权

US5786954A Magnetic disk recording and playback apparatus using independently positioned recorded pattern sets for clock generation 失效
标题翻译：使用独立定位的记录图案集的磁盘记录和重放装置用于时钟产生
公开(公告)号：US5786954A
公开(公告)日：1998-07-28
申请号：US840414
申请日：1997-04-29
申请人： Hiroaki Yada , Nobuhiro Hayashi , Takamichi Yamakoshi , Munekatsu Fukuyama
发明人： Hiroaki Yada , Nobuhiro Hayashi , Takamichi Yamakoshi , Munekatsu Fukuyama
IPC分类号： G11B5/012 , G11B5/09 , G11B5/48 , G11B20/10 , G11B20/14 , G11B27/30
CPC分类号： G11B20/10055 , G11B20/10009 , G11B20/10222 , G11B20/1403 , G11B27/3027 , G11B5/012 , G11B5/09 , G11B5/4886 , G11B2220/20
摘要： A highly reliable magnetic recording and playback apparatus utilizes an independent magnetic clock pattern region and a pattern set region to provide a common timing reference between a data recording region and its adjacent tracks. In the apparatus, the pattern set region provides a reference point so that the circumferential location of the magnetic pattern region can be determined. In one embodiment, the apparatus includes elements for playback of reproduced information recorded on a magnetic disk and an arrangement which provides for the generation of a data existing point clock.
摘要翻译：高度可靠的磁记录和重放装置利用独立的磁时钟图形区域和图案组区域来提供数据记录区域和其相邻轨道之间的公共定时参考。在该装置中，图案集区域提供参考点，使得可以确定磁图案区域的周向位置。在一个实施例中，该装置包括用于回放记录在磁盘上的再现信息的元件以及用于产生数据存在点时钟的装置。

10. 发明授权

US5416645A Reproducing circuit having common base amplifier, low-pass filter and peak detector for use with magnetoresistive head 失效
标题翻译：具有公共基极放大器，低通滤波器和峰值检测器的再现电路用于磁阻头
公开(公告)号：US5416645A
公开(公告)日：1995-05-16
申请号：US140457
申请日：1993-10-25
申请人： Munekatsu Fukuyama
发明人： Munekatsu Fukuyama
IPC分类号： G11B5/39 , G01R33/09 , G11B5/00 , G11B5/02 , G11B5/09 , G01R33/02
CPC分类号： G11B5/02 , G01R33/09 , G11B2005/0016
摘要： A magnetoresistive element of a magnetoresistive head is connected to the emitter of a first-stage transistor which serves as a common base amplifier. A base current supplied to the base of the first-stage transistor is adjusted to equalize a sensing current to an emitter current. A reproducing circuit of such an arrangement requires no sensing current source and no DC blocking capacitor.
摘要翻译：磁阻头的磁阻元件连接到用作公共基极放大器的第一级晶体管的发射极。调节提供给第一级晶体管的基极的基极电流以使感测电流与发射极电流相等。这种布置的再现电路不需要感测电流源和没有隔直流电容器。

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