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公开(公告)号：US11256779B2
公开(公告)日：2022-02-22
申请号：US16801429
申请日：2020-02-26
发明人： Taro Kanao , Kosuke Tatsumura , Hayato Goto
IPC分类号： G06F17/16
摘要： A calculation apparatus according to an embodiment includes one or more processing circuits configured to function as an interaction unit, a first addition unit, and a time evolution unit. The interaction unit generates N first intermediate variables obtained by performing a matrix computing on the N first variables and the coefficient matrix at the first time. The first addition unit calculates N second variables at the second time at which the sampling period elapses from the first time. The time evolution unit executes a time evolution process on the N second variables at the first time to generate N first variables at the second time. If the N first variables at the second time unsatisfied a predetermined constraint condition, the time evolution unit changes the N second variables at the second time in a direction of satisfying the constraint condition.
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公开(公告)号：US10127931B2
公开(公告)日：2018-11-13
申请号：US15266161
申请日：2016-09-15
发明人： Hirofumi Suto , Kiwamu Kudo , Tazumi Nagasawa , Taro Kanao , Rie Sato , Koichi Mizushima
摘要： According to one embodiment, a magnetic recording and reproducing device includes a magnetic recording medium, a magnetic head, and a controller. The controller implements a first operation and a second operation. The first operation is implemented in a first information recording interval including a first recording interval and a first non-recording interval. The second operation is implemented in a second information recording interval including a second recording interval and a second non-recording interval. The first operation includes in the first recording interval, generating a first signal magnetic field from the magnetic head, and in the first non-recording interval, generating a first non-signal magnetic field from the magnetic head. The second operation includes in the second recording interval, generating a second signal magnetic field from the magnetic head, and in the second non-recording interval, generating a second non-signal magnetic field from the magnetic head.
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公开(公告)号：US20230059903A1
公开(公告)日：2023-02-23
申请号：US17676884
申请日：2022-02-22
发明人： Noritsugu Shiokawa , Hayato Goto , Taro Kanao
IPC分类号： H01P7/04
摘要： According to one embodiment, an electronic circuit includes an element part. The element part includes a first resonator and a second resonator. The first resonator includes a first conductive layer, a second conductive layer, a first current path including a first Josephson junction, and a second current path including a second Josephson junction. The first current path includes a first end portion and a second end portion. The first end portion is connected with the first conductive layer. The second end portion is connected with the second conductive layer. The second current path includes a third end portion and a fourth end portion. The third end portion is connected with the first conductive layer. The fourth end portion is connected with the second conductive layer. The second resonator is configured to be electromagnetically coupled with the first resonator.
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公开(公告)号：US10027334B2
公开(公告)日：2018-07-17
申请号：US15261058
申请日：2016-09-09
发明人： Taro Kanao , Tazumi Nagasawa , Hayato Goto , Kiwamu Kudo , Hirofumi Suto , Michinaga Yamagishi , Koichi Mizushima , Rie Sato
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.
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公开(公告)号：US11836458B2
公开(公告)日：2023-12-05
申请号：US17012716
申请日：2020-09-04
发明人： Taro Kanao , Hayato Goto
摘要： According to one embodiment, a calculating device includes nonlinear oscillators, connectors, and a controller. One of the connectors connects at least two of the nonlinear oscillators. The nonlinear oscillators include first and second nonlinear oscillators. The first nonlinear oscillator includes a first circuit part and a first conductive member. The first circuit part includes first and second Josephson junctions. The second nonlinear oscillator includes a second circuit part and a second conductive member. The second circuit part includes third and fourth Josephson junctions. Numbers of the connectors connected to the first and second connectors are first and second numbers, respectively. The second number is greater than the first number. The controller performs at least a first operation of supplying a first signal to the first conductive member and supplying a second signal to the second conductive member. The second signal is different from the first signal.
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公开(公告)号：US11170069B2
公开(公告)日：2021-11-09
申请号：US16299625
申请日：2019-03-12
发明人： Taro Kanao , Hayato Goto , Kosuke Tatsumura
摘要： According to one embodiment, a calculating device includes a processor. The processor acquires a data set {s} and repeats a processing procedure. The processing procedure includes first and second variable updates. The first variable update includes updating an ith entry of a first variable xi by adding a first function to the ith entry of the first variable xi. The ith entry of the first variable xi is one of a first variable set {x}. A variable of the first function includes at least a part of a second variable set {y}. The second variable update includes updating an ith entry of a second variable yi by adding a second function and a third function to the ith entry of the second variable yi. The ith entry of the second variable yi is one of the second variable set {y}. The processor outputs at least a fourth function.
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公开(公告)号：US11741187B2
公开(公告)日：2023-08-29
申请号：US17461452
申请日：2021-08-30
发明人： Taro Kanao , Hayato Goto , Ryo Hidaka , Kosuke Tatsumura
IPC分类号： G06F17/11
CPC分类号： G06F17/11
摘要： A calculation device includes a memory and one or more processors coupled to the memory and configured to alternately update, for elements each associated with first and second variables, the first and second variables, sequentially for unit times from an initial time to an end time. In an updating process for each unit time, the one or more processors are configured to: update, for each of the elements, the first variable based on the second variable; when the first variable is smaller than a first value, change the first variable to the first value and change the second variable to a third value; when the first variable is greater than a second value, change the first variable to the second value and change the second variable to the third value; and add an acceleration value calculated by a predetermined computation to the second variable.
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公开(公告)号：US10522172B2
公开(公告)日：2019-12-31
申请号：US15921987
申请日：2018-03-15
摘要： According to one embodiment, an oscillator includes a first element. The first element includes first and second magnetic layers, and a first nonmagnetic layer. The first magnetic layer includes first and second magnetic films, and a first nonmagnetic film. The second magnetic film is provided between the second magnetic layer and the first magnetic film. The first nonmagnetic layer is provided between the second magnetic film and the second magnetic layer. An orientation of a first magnetization of the first magnetic film has a reverse component of an orientation of a second magnetization of the second magnetic film. A first magnetic field is applied to the first element. The first element is in a first state when a first current flows in the first element. An electrical resistance of the first element in the first state includes first and second electrical resistances repeating alternately.
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公开(公告)号：US10424325B2
公开(公告)日：2019-09-24
申请号：US15692197
申请日：2017-08-31
发明人： Hirofumi Suto , Kiwamu Kudo , Tazumi Nagasawa , Taro Kanao , Rie Sato , Koichi Mizushima
摘要： According to one embodiment, a magnetic head includes a first magnetic layer, a second magnetic layer, an intermediate layer, a magnetic pole, a first terminal, and a second terminal. The second magnetic layer is separated from the first magnetic layer in a first direction. The intermediate layer is provided between the first magnetic layer and the second magnetic layer. A second direction from the first magnetic layer toward the magnetic pole crosses the first direction. The first terminal is electrically connected to the intermediate layer. The second terminal is electrically connected to the second magnetic layer.
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10.发明授权公开(公告)号：US09984723B2
公开(公告)日：2018-05-29
申请号：US15444646
申请日：2017-02-28
发明人： Tazumi Nagasawa , Taro Kanao , Michinaga Yamagishi , Hirofumi Suto , Kiwamu Kudo , Rie Sato , Koichi Mizushima
CPC分类号： G11B20/10481 , G11B5/3909 , G11B20/10009
摘要： A magnetic recording and reproducing apparatus for recording and reproducing bit information comprising a magnetic head having a spin torque oscillator configured to readout bit information which is recorded on a magnetic recording medium, a detector configured to detect amplitude of a first signal, the first signal which is to reproduce the bit information, and a controller configured to control the magnetic head so as to read the bit information recorded on the magnetic recording medium when the amplitude of the first signal detected by the detector is smaller than a predetermined value.
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