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11. 发明申请

US20170061999A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE 审中-公开
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：US20170061999A1
公开(公告)日：2017-03-02
申请号：US15247182
申请日：2016-08-25
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hirofumi SUTO , Kiwamu Kudo , Tazumi Nagasawa , Taro Kanao , Rie Sato , Koichi Mizushima
IPC分类号： G11B5/73
CPC分类号： G11B5/66 , G11B5/64
摘要： According to one embodiment, a magnetic recording medium includes a first magnetic layer and a second magnetic layer. An easy magnetization axis of the first magnetic layer is aligned with a first direction. The first direction is from the first magnetic layer toward the second magnetic layer. The second magnetic layer has magnetic anisotropy in a plane perpendicular to the first direction. A second magnetization of the second magnetic layer is reverse orientation of a first magnetization of the first magnetic layer.
摘要翻译：根据一个实施例，磁记录介质包括第一磁性层和第二磁性层。第一磁性层的易磁化轴与第一方向对准。第一方向是从第一磁性层朝向第二磁性层。第二磁性层在垂直于第一方向的平面内具有磁各向异性。第二磁性层的第二磁化强度是第一磁性层的第一磁化强度的反方向。

12. 发明申请

US20140247520A1 MAGNETIC STORAGE MEDIUM AND MAGNETIC RECORDING APPARATUS 审中-公开
标题翻译：磁性存储介质和磁记录装置
公开(公告)号：US20140247520A1
公开(公告)日：2014-09-04
申请号：US14104221
申请日：2013-12-12
申请人： Kabushiki Kaisha Toshiba
发明人： Tao YANG , Hirofumi Suto , Juwany Kudo , Tazumi Nagasawa , Rie Sato , Koichi Mizushima
IPC分类号： G11B5/66
CPC分类号： G11B5/66
摘要： According to one embodiment, a magnetic storage medium includes a plurality of recording layers and a first non-magnetic layer. The plurality of recording layers each includes at least one first magnetic layer and at least one second magnetic layer. The first magnetic layer is made of a first magnetic material which has a first effective perpendicular magnetic anisotropy. Data is stored in first magnetic layer in accordance with a direction of magnetization. The second magnetic layer is made of a second magnetic material having a second effective perpendicular magnetic anisotropy smaller than the first effective perpendicular magnetic anisotropy. First magnetization of the first magnetic layer and second magnetization of the second magnetic layer are in magnetic coupling.
摘要翻译：根据一个实施例，磁存储介质包括多个记录层和第一非磁性层。多个记录层各自包括至少一个第一磁性层和至少一个第二磁性层。第一磁性层由具有第一有效垂直磁各向异性的第一磁性材料制成。根据磁化方向将数据存储在第一磁性层中。第二磁性层由具有小于第一有效垂直磁各向异性的第二有效垂直磁各向异性的第二磁性材料制成。第一磁性层的第一磁化和第二磁性层的第二磁化是磁耦合。

13. 发明授权

US11593070B2 Arithmetic device 有权
公开(公告)号：US11593070B2
公开(公告)日：2023-02-28
申请号：US16814479
申请日：2020-03-10
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Rie Sato , Koichi Mizushima
IPC分类号： G06F7/57 , G06N3/04 , G06N3/063 , G11C11/407 , H01L27/108 , G06N3/049
摘要： According to one embodiment, an arithmetic device includes an arithmetic circuit. The arithmetic circuit includes a memory part including a plurality of memory regions, and an arithmetic part. One of the memory regions includes a capacitance including a first terminal, and a first electrical circuit electrically connected to the first terminal and configured to output a voltage signal corresponding to a potential of the first terminal.

14. 发明授权

US11461075B2 Arithmetic device 有权
公开(公告)号：US11461075B2
公开(公告)日：2022-10-04
申请号：US17004228
申请日：2020-08-27
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Takao Marukame , Koichi Mizushima , Kumiko Nomura , Yoshifumi Nishi
IPC分类号： G06F7/57 , G06F7/503 , G06F7/544 , G06G7/16 , G05F3/22
摘要： According to an embodiment, an arithmetic device includes a comparator, M cross switches, and M coefficient circuits. The comparator compares a first voltage generated at a first comparison terminal and a second voltage generated at a second comparison terminal. The M cross switches are provided corresponding to the M input signals. The M coefficient circuits are provided corresponding to the M coefficients, and each includes a first constant current source and a second constant current source. Each of the M cross switches performs switching between a straight state and a reverse state. In each of the M coefficient circuits, the first constant current source is connected between a positive output terminal of the corresponding coefficient circuit and a reference potential, and the second constant current source is connected between a negative output terminal of the corresponding coefficient circuit and the reference potential.

15. 发明授权

US11380375B2 Storage device and neural network apparatus 有权
公开(公告)号：US11380375B2
公开(公告)日：2022-07-05
申请号：US17185769
申请日：2021-02-25
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Takao Marukame , Koichi Mizushima , Kumiko Nomura , Yoshifumi Nishi
IPC分类号： G11C7/16 , G11C7/10 , G11C7/20 , G06N3/063 , G11C13/00
摘要： A storage device according to an embodiment is for storing weights being continuous values. The storage device includes: a shift register, an initialization circuit, an update control circuit, and a readout control circuit. The shift resistor includes a plurality of cells, each being arranged in series and storing information. A position of each of the plurality of cells corresponds to the weight. The initialization circuit writes the information to a cell in the shift register. The update control circuit shifts a position of the cell storing the information in a direction corresponding to a sign of an update amount by a number of cells corresponding to an absolute value of the update amount. The readout control circuit reads out the information and outputs an output value according to the weight corresponding to the position of the cell storing the information.

16. 发明申请

US20200019377A1 ARITHMETIC DEVICE 审中-公开
公开(公告)号：US20200019377A1
公开(公告)日：2020-01-16
申请号：US16351287
申请日：2019-03-12
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Rie SATO , Koichi Mizushima
IPC分类号： G06F7/575 , G11C19/28
摘要： According to one embodiment, an arithmetic device includes one or a plurality of arithmetic units. One of the one or plurality of arithmetic units includes a memory part including a plurality of memory regions, and an arithmetic part. At least one of the memory regions includes a memory element. The memory element is of a shift register-type.

17. 发明授权

US10027334B2 Computing apparatus and computing method 有权
公开(公告)号：US10027334B2
公开(公告)日：2018-07-17
申请号：US15261058
申请日：2016-09-09
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Taro Kanao , Tazumi Nagasawa , Hayato Goto , Kiwamu Kudo , Hirofumi Suto , Michinaga Yamagishi , Koichi Mizushima , Rie Sato
IPC分类号： H03L7/26 , H03L7/099
摘要： According to an embodiment, a computing apparatus includes spin torque oscillators, an interaction unit, a variable direct-current supply device, and a measuring unit. The interaction unit controls an interaction between the spin torque oscillators. The variable direct-current supply device supplies a current to induce oscillations of the spin torque oscillators. The measuring unit measures AC signals obtained from the spin torque oscillators.

18. 发明授权

US09437218B2 Magnetic recording head and magnetic recording apparatus 有权
标题翻译：磁记录头和磁记录装置
公开(公告)号：US09437218B2
公开(公告)日：2016-09-06
申请号：US14796462
申请日：2015-07-10
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Kiwamu Kudo , Hirofumi Suto , Tazumi Nagasawa , Koichi Mizushima , Rie Sato
IPC分类号： G11B5/00 , G11B5/39
CPC分类号： G11B5/00 , G11B5/235 , G11B5/3146 , G11B2005/0002 , G11B2005/0021 , G11B2005/0024 , G11B2005/3996
摘要： According to an embodiment, a magnetic recording head includes a main magnetic pole and a spin torque oscillator. The spin torque oscillator includes a first perpendicular free layer, a second perpendicular free layer, and a first spacer layer, each of the first perpendicular free layer and the second perpendicular free layer including a magnetic anisotropy axis in a direction perpendicular to a film plane of the spin torque oscillator. An effective perpendicular magnetic anisotropy magnetic field of the first perpendicular free layer is smaller than an effective perpendicular magnetic anisotropy magnetic field of the second perpendicular free layer, and a current is applied from the first perpendicular free layer side to the second perpendicular free layer side.
摘要翻译：根据实施例，磁记录头包括主磁极和自旋扭矩振荡器。自旋扭矩振荡器包括第一垂直自由层，第二垂直自由层和第一间隔层，第一垂直自由层和第二垂直自由层中的每一个包括在垂直于膜平面的方向上的磁各向异性轴自旋扭矩振荡器。第一垂直自由层的有效垂直磁各向异性磁场小于第二垂直自由层的有效垂直磁各向异性磁场，并且从第一垂直自由层侧向第二垂直自由层侧施加电流。

19. 发明授权

US09159342B2 Magnetic recording apparatus 有权
标题翻译：磁记录装置
公开(公告)号：US09159342B2
公开(公告)日：2015-10-13
申请号：US14483552
申请日：2014-09-11
申请人： Kabushiki Kaisha Toshiba
发明人： Kiwamu Kudo , Tazumi Nagasawa , Hirofumi Suto , Tao Yang , Koichi Mizushima , Rie Sato
IPC分类号： G11B5/127 , G11B5/31 , G11B5/00
CPC分类号： G11B5/314 , G11B2005/0024
摘要： According to an embodiment, a magnetic recording apparatus includes following elements. The spin torque oscillator generates a first oscillating magnetic field. The recording medium unit includes one or more recording medium layers which are stacked, each of the one or more recording medium layers including a recording medium and spin-wave lines each of which generates a second oscillating magnetic field. The write magnetic field source generates a write magnetic field. The controller is configured to control the spin torque oscillator, the spin-wave lines, and the write magnetic field source to simultaneously apply the write magnetic field, and the first and second oscillating magnetic fields to target medium magnetization in the recording medium.
摘要翻译：根据实施例，磁记录装置包括以下元件。自旋转矩振荡器产生第一振荡磁场。记录介质单元包括堆叠的一个或多个记录介质层，所述一个或多个记录介质层中的每一个包括记录介质和每个产生第二振荡磁场的旋转波线。写磁场源产生写入磁场。控制器被配置为控制自旋扭矩振荡器，自旋波线和写入磁场源，以同时施加写入磁场，以及第一和第二振荡磁场以在记录介质中的目标介质磁化强度。

20. 发明申请

US20230058490A1 SYNAPTIC CIRCUIT AND NEURAL NETWORK APPARATUS 有权
公开(公告)号：US20230058490A1
公开(公告)日：2023-02-23
申请号：US17688171
申请日：2022-03-07
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Kumiko Nomura , Yoshifumi Nishi , Takao Marukame , Koichi Mizushima
IPC分类号： G06N3/04 , G06N3/08
摘要： A synaptic circuit according to an embodiment includes a weight storage circuit and a transmission circuit. The weight storage circuit stores a synaptic weight indicating a first value or a second value. The transmission circuit receives a firing signal output from a pre-synaptic neuron circuit, and supplies an output signal to a post-synaptic neuron circuit. The output signal is obtained by adding, to the firing signal, influence of the synaptic weight. The post-synaptic neuron circuit holds an internal potential. When the firing signal is received, the weight storage circuit causes the synaptic weight to change to indicate the first or second value with a first probability in accordance with a comparison result between the internal potential and a set potential. The weight storage circuit causes the synaptic weight to change to indicate the first value with a second probability regardless of whether or not the firing signal is received.

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