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公开(公告)号：US12267042B2
公开(公告)日：2025-04-01
申请号：US17625413
申请日：2020-06-26
Applicant: NEC Corporation
Inventor： Tsuyoshi Yamamoto , Yoshihito Hashimoto
IPC: H03B15/00 , G01C19/56 , G01C19/5607 , G01C19/5642 , G01C19/5649 , G01C19/5719 , G06N10/40 , H10N60/10
Abstract: An oscillation apparatus includes: an oscillator including a resonator and a magnetic-field generation unit, the resonator including a loop circuit and a capacitor, the loop circuit including a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction connected in a ring shape, the magnetic-field generation unit being configured to apply a magnetic field to the loop circuit, and the oscillator being configured to perform parametric oscillation; a read-out unit for reading out an internal state of the oscillator; and a circuit component in which a coupling strength between the oscillator and the read-out unit is variable. The oscillator is connected to the read-out unit through the circuit component.
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公开(公告)号：US12207393B2
公开(公告)日：2025-01-21
申请号：US18588294
申请日：2024-02-27
Applicant: NEC Corporation
Inventor： Yoshihito Hashimoto , Tsuyoshi Yamamoto , Kohei Matsuura
Abstract: A sample holder includes a base comprising a support structure and a printed circuit board (PCB) in contact with the base. The PCB includes: a dielectric; a front-surface ground (GND) formed on a front surface of the dielectric; a back-surface GND formed on a back surface of the dielectric; a through hole penetrating from the front-surface GND to the back-surface GND, the through hole in which a chip is disposed, and a conductor that electrically connects the front-surface GND and the back-surface GND on an end face of the through hole. At least a part of the base below the through hole has a cavity. The support structure that supports a surface of the chip and is electrically connected to the base. The support structure is disposed in the cavity.
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公开(公告)号：US12078675B2
公开(公告)日：2024-09-03
申请号：US17036820
申请日：2020-09-29
Applicant: NEC CORPORATION
Inventor： Tsuyoshi Yamamoto , Yoshihito Hashimoto
IPC: G01R31/317 , G06N10/20 , G06N10/40 , H03J3/12 , H10N60/00
CPC classification number: G01R31/31702 , G06N10/20 , G06N10/40 , H03J3/12 , H10N60/00
Abstract: A calibration method, a calibration apparatus, and a program capable of estimating a degree of signal loss of an input signal supplied to an oscillator are provided. The calibration method includes: outputting an input signal to be input to an oscillator to be calibrated that includes a resonator and performs parametric oscillation, from a signal generator connected to the resonator via a transmission path while sweeping a frequency or a power of this input signal; acquiring distribution data of an intensity of a reflection signal based on measurement of the intensity of the reflection signal from the oscillator in response to the input signal; and estimating a degree of signal loss by comparing the distribution data acquired by the measurement with the distribution data theoretically obtained in which a value of the degree of the signal loss of the transmission path is assumed.
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公开(公告)号：US20240196521A1
公开(公告)日：2024-06-13
申请号：US18588294
申请日：2024-02-27
Applicant: NEC Corporation
Inventor： Yoshihito Hashimoto , Tsuyoshi Yamamoto , Kohei Matsuura
CPC classification number: H05K1/0237 , H05K1/115 , H05K1/183
Abstract: A sample holder includes a base comprising a support structure and a printed circuit board (PCB) in contact with the base. The PCB includes: a dielectric; a front-surface ground (GND) formed on a front surface of the dielectric; a back-surface GND formed on a back surface of the dielectric; a through hole penetrating from the front-surface GND to the back-surface GND, the through hole in which a chip is disposed, and a conductor that electrically connects the front-surface GND and the back-surface GND on an end face of the through hole. At least a part of the base below the through hole has a cavity. The support structure that supports a surface of the chip and is electrically connected to the base. The support structure is disposed in the cavity.
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公开(公告)号：US11916513B2
公开(公告)日：2024-02-27
申请号：US18134145
申请日：2023-04-13
Applicant: NEC Corporation
Inventor： Yoshihito Hashimoto , Tsuyoshi Yamamoto , Tomohiro Yamaji
CPC classification number: H03B15/003 , H10N60/12
Abstract: An oscillator in which crosstalk can be reduced is provided. An oscillator includes a SQUID, a transmission line connected to the SQUID, a ground plane, and a first connection circuit disposed in a vicinity of a node of an electric field of a standing wave that is generated when the oscillator is oscillating, the first connection circuit connecting parts of the ground plane located on both sides of the transmission line to each other.
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Patent Agency Ranking
公开(公告)号：US20230171908A1
公开(公告)日：2023-06-01
申请号：US17994728
申请日：2022-11-28
Applicant: NEC Corporation
Inventor： Yoshihito HASHIMOTO , Tsuyoshi Yamamoto
Abstract: A sample holder includes: a pedestal made of metal; and a PCB (Printed Circuit Board) placed on the pedestal. The PCB includes a through opening that penetrates from a front surface to a rear surface of the PCB. The pedestal includes a cavity bottomed and with a top of the pedestal opened, the cavity formed at a portion corresponding to directly under the through opening on a side of the pedestal on which the PCB is placed. As a configuration on the side on which the PCB is placed, viewed from above, a part of the cavity is protruded outward from the through opening.
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公开(公告)号：US20220236342A1
公开(公告)日：2022-07-28
申请号：US17583734
申请日：2022-01-25
Applicant: NEC Corporation
Inventor： Yoshihito Hashimoto , Tsuyoshi Yamamoto , Tomohiro Yamaji
IPC: G01R33/035 , H01L39/22 , H01L39/02 , G06N10/70
Abstract: An oscillator in which crosstalk can be reduced is provided. An oscillator includes a ground plane made of a superconductor, a conductive member spaced apart from and surrounded by the ground plane, a SQUID of which one end is connected to the conductive member and the other end is connected to the ground plane, a first connection circuit made of a superconductor, connecting parts of the ground plane located on both sides of a vicinity of a connection part between the conductive member and the SQUID to each other, and a superconducting loop circuit surrounding the SQUID and using the ground plane and the first connection circuit.
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公开(公告)号：US12021520B2
公开(公告)日：2024-06-25
申请号：US17626567
申请日：2020-06-26
Applicant: NEC Corporation
Inventor： Tsuyoshi Yamamoto , Tomohiro Yamaji , Yoshihito Hashimoto
CPC classification number: H03K17/92 , G06N10/40 , H03B15/003
Abstract: A resonator, an oscillator, and a quantum computer in which the area occupied by the circuit can be reduced is provided. A resonator (100) includes a loop circuit (110) in which a first superconducting line (101), a first Josephson junction (103), a second superconducting line (102), and a second Josephson junction (104) are connected in a ring shape, and a capacitor (120). The capacitor (120) and the loop circuit (110) are connected in a ring shape.
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公开(公告)号：US11955929B2
公开(公告)日：2024-04-09
申请号：US17626576
申请日：2020-06-26
Applicant: NEC Corporation
Inventor： Tsuyoshi Yamamoto , Yoshihito Hashimoto
CPC classification number: H03B15/003 , G06N10/00
Abstract: An oscillation apparatus includes: an oscillator including a resonator and a magnetic-field generating unit, the resonator including a loop circuit and a capacitor, the loop circuit including a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction connected in a ring shape, the magnetic-field generating unit being configured to apply a magnetic field to the loop circuit, and the oscillator being configured to perform parametric oscillation; a read-out unit for reading out an internal state of the oscillator; and a filter configured to restrict transmission of a signal in a predetermined frequency band. A circuit in which the capacitor and the loop circuit are connected in a ring shape is connected to the read-out unit through the filter.
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公开(公告)号：US20230299719A1
公开(公告)日：2023-09-21
申请号：US18134145
申请日：2023-04-13
Applicant: NEC Corporation
Inventor： Yoshihito HASHIMOTO , Tsuyoshi Yamamoto , Tomohiro Yamaji
CPC classification number: H03B15/003 , H10N60/12
Abstract: An oscillator in which crosstalk can be reduced is provided. An oscillator includes a SQUID, a transmission line connected to the SQUID, a ground plane, and a first connection circuit disposed in a vicinity of a node of an electric field of a standing wave that is generated when the oscillator is oscillating, the first connection circuit connecting parts of the ground plane located on both sides of the transmission line to each other.
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