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公开(公告)号：US20180302035A1
公开(公告)日：2018-10-18
申请号：US15569500
申请日：2016-04-27
Inventor： Shingo Tamaru , Hitoshi Kubota , Akio Fukushima , Shinji Yuasa
CPC classification number: H03B15/006 , H01F10/3259 , H01L29/82 , H01L43/02 , H01L43/08 , H01L43/10 , H03B15/00 , H03L7/093 , H03L7/099 , H03L7/18
Abstract: The present invention provides a high-frequency phase-locked oscillation circuit having an extremely narrow peak width and a stable frequency so that a high-frequency wave that is oscillated by the MR element solves a problem of a large peak width of oscillation spectrum. The high-frequency phase-locked oscillation circuit is achieved by providing: a magnetoresistive element 6 that oscillates a high-frequency wave with an oscillating frequency fout; a reference signal source 1 that outputs a reference signal with a reference frequency fref; a phase-locked loop circuit having a phase comparator 3, a loop filer 4, and a frequency divider 9; an adder 5 that adds a phase error signal A output from the loop filter and a bias voltage B for oscillating the high-frequency wave from the magnetoresistive element, and that inputs an added bias voltage (A+B) to the magnetoresistive element 6; and a filter 7 provided between the frequency divider 9 and the magnetoresistive element 6 in a region closer to an input side of the frequency divider 9, the filter cutting off the reference frequency fref while allowing the oscillating frequency fout to pass through the filter.
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公开(公告)号：US10432144B2
公开(公告)日：2019-10-01
申请号：US15569500
申请日：2016-04-27
Inventor： Shingo Tamaru , Hitoshi Kubota , Akio Fukushima , Shinji Yuasa
IPC: H03B15/00 , H01L43/08 , H01L29/82 , H03L7/099 , H01F10/32 , H01L43/02 , H03L7/093 , H01L43/10 , H03L7/18
Abstract: A high-frequency phase-locked oscillation circuit having an extremely narrow peak width and a stable frequency so that a high-frequency wave that is oscillated by the MR element solves a problem of a large peak width of oscillation spectrum. The high-frequency phase-locked oscillation circuit includes a magnetoresistive element that oscillates a high-frequency wave with an oscillating frequency; a reference signal source that outputs a reference signal with a reference frequency; a phase-locked loop circuit having a phase comparator, a loop filter, and a frequency divider; an adder that adds a phase error signal output from the loop filter and a bias voltage for oscillating the high-frequency wave from the magnetoresistive element, and that inputs an added bias voltage to the magnetoresistive element; and a filter provided between the frequency divider and the magnetoresistive element.
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公开(公告)号：US12165009B2
公开(公告)日：2024-12-10
申请号：US17603517
申请日：2020-04-14
Inventor： Hitoshi Kubota , Shingo Tamaru , Akio Fukushima , Takahiro Mori , Takashi Matsukawa
Abstract: The present invention addresses the problem of providing a quantum bit cell and a quantum bit integrated circuit having an easy-to-integrate structure. The quantum bit cell of the present invention including a spin torque oscillator capable of emitting a microwave with a propagation distance of 1 μm or less and having a maximum diameter of 1 μm or less, and a solid-state element quantum bit arranged near the spin torque oscillator at an interval of the propagation distance or less, where a quantum two-level system is controlled by the microwave.
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公开(公告)号：US20220222564A1
公开(公告)日：2022-07-14
申请号：US17603517
申请日：2020-04-14
Inventor： Hitoshi Kubota , Shingo Tamaru , Akio Fukushima , Takahiro Mori , Takashi Matsukawa
Abstract: The present invention addresses the problem of providing a quantum bit cell and a quantum bit integrated circuit having an easy-to-integrate structure. The quantum bit cell of the present invention including a spin torque oscillator capable of emitting a microwave with a propagation distance of 1 μm or less and having a maximum diameter of 1 μm or less, and a solid-state element quantum bit arranged near the spin torque oscillator at an interval of the propagation distance or less, where a quantum two-level system is controlled by the microwave.
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