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1.发明申请DIGITAL/ANALOG CONVERTOR AND DIGITAL AUDIO PROCESSING CIRCUIT ADOPTING THE SAME 审中-公开数字/模拟转换器和数字音频处理电路公开(公告)号：US20110270427A1
公开(公告)日：2011-11-03
申请号：US13069148
申请日：2011-03-22
申请人： Yuki TAKAHASHI , Mitsuo Kitamura
发明人： Yuki TAKAHASHI , Mitsuo Kitamura
CPC分类号： H03M3/372 , H03K5/1565 , H03M3/502
摘要： A digital analog convertor has a modulator which modulates a digital signal to generate a pulse signal having a pulse density corresponding to a digital value of the digital signal; a first RZ conversion circuit which RZ-converts the pulse signal based on a first clock signal to generate a first RZ pulse signal; a first integration circuit which integrates the first RZ pulse signal to output a first analog signal; a second RZ conversion circuit which RZ-converts a first level signal having a first level of the pulse signal based on the first clock signal to generate a second RZ pulse signal; a second integration circuit which integrates the second RZ pulse signal to output a second analog signal; and a clock duty control circuit which controls a duty ratio of the first clock signal so that the second analog signal approaches a given reference level.
摘要翻译： 数字模拟转换器具有调制器，其调制数字信号以产生具有对应于数字信号的数字值的脉冲密度的脉冲信号; 第一RZ转换电路，其基于第一时钟信号RZ转换脉冲信号以产生第一RZ脉冲信号; 第一积分电路，其对第一RZ脉冲信号进行积分以输出第一模拟信号; 第二RZ转换电路，其基于所述第一时钟信号RZ转换具有所述脉冲信号的第一电平的第一电平信号，以产生第二RZ脉冲信号; 第二积分电路，其对所述第二RZ脉冲信号进行积分以输出第二模拟信号; 以及时钟占空比控制电路，其控制第一时钟信号的占空比，使得第二模拟信号接近给定的参考电平。
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公开(公告)号：US20230067284A1
公开(公告)日：2023-03-02
申请号：US18053392
申请日：2022-11-08
申请人： Yuki TAKAHASHI , Tomoya ISHITANI
发明人： Yuki TAKAHASHI , Tomoya ISHITANI
摘要： Provided is a vibration actuator that includes: a coil; a core around which the coil is wound, the core including both ends projecting from the coil; a yoke formed of a magnetic material and disposed opposite to the both ends of the core at a position adjacent to the both ends of the core with a gap provided between the yoke and the both ends of the core in a direction orthogonal to a winding axis of the coil; and an elastic part fixed between the core and the yoke and configured for elastic support to enable a movement between the core and the yoke in a direction opposite to at least one of the both ends of the core.
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公开(公告)号：US20220123642A1
公开(公告)日：2022-04-21
申请号：US17561956
申请日：2021-12-26
申请人： Yuki TAKAHASHI , Chikara SEKIGUCHI , Shigeyuki SHIMOMURA , Daisuke KODAMA , Yuta YOSHII , Yasutaka KITAMURA , Shigenori INAMOTO
发明人： Yuki TAKAHASHI , Chikara SEKIGUCHI , Shigeyuki SHIMOMURA , Daisuke KODAMA , Yuta YOSHII , Yasutaka KITAMURA , Shigenori INAMOTO
IPC分类号： H02K33/06
摘要： A vibration actuator includes: a movable body including: a disk-shaped magnet; a pair of disk-shaped cores fixed on front and rear surfaces of the disk-shaped magnet and each having an opening at a center thereof; a pair of leaf springs having a substantially circular shape; and a pair of spring stopper weight parts each having one end positioned by joining the opening to be joined with one of the disk-shaped cores and having another end connected to a central part of one of the leaf springs; and a fixing body including an annular coil and configured to support and accommodate therein the movable body such that the disk-shaped magnet, the disk-shaped cores and the spring stopper weight parts are capable of vibrating in an axial direction inside the annular coil.
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公开(公告)号：US20220111418A1
公开(公告)日：2022-04-14
申请号：US17298054
申请日：2019-11-26
摘要： Provided is a control device capable of reducing cost and thickness by using an electromagnetic actuator, and capable of efficiently generating a thrust suitable for a haptic feeling feedback to an operator who touches and operates thereto. The control device controls the electromagnetic actuator that drives an operation device supported to be elastically vibrated in one direction of a vibrating direction thereof; includes a current pulse supply unit configured to supply a plurality of drive current pulses to a coil of the electromagnetic actuator as a drive current for driving the operation device in response to a touch operation of the operation device; and an interval between peaks for each of the drive current pulses is in a range of ½ times to 1 times a vibration period of an elastic vibration.
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公开(公告)号：US20200381987A1
公开(公告)日：2020-12-03
申请号：US16885269
申请日：2020-05-28
申请人： Yuki TAKAHASHI , Chikara SEKIGUCHI , Shigeyuki SHIMOMURA , Yoshihiro KUMANOMIDO , Daisuke KODAMA , Yuta YOSHII , Shigenori INAMOTO
发明人： Yuki TAKAHASHI , Chikara SEKIGUCHI , Shigeyuki SHIMOMURA , Yoshihiro KUMANOMIDO , Daisuke KODAMA , Yuta YOSHII , Shigenori INAMOTO
摘要： A fixing body includes a coil holding part that is disposed to surround a magnet externally in a radial direction and holds the coil disposed outside the bobbin-shaped coil holding part in the radial direction. The coil holding part includes a coil protection wall portion that is disposed inside the coil in the radial direction of the coil with a gap being interposed between the coil protection wall portion and the magnet, and inhibits contact between the coil and the movable body. Elastic supporting parts are a plurality of leaf springs installed between the fixing body and the movable body to sandwich the movable body in the vibration direction, and support the movable body such that, in a non-vibration state and in a vibration state of the movable body, the movable body is freely movable in the vibration direction without making contact with the coil holding part.
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公开(公告)号：US20190151896A1
公开(公告)日：2019-05-23
申请号：US16194416
申请日：2018-11-19
摘要： A vibration actuator includes: a movable part including a coil; a fixing part including a magnet; and an elastic supporting part supporting the movable part such that the movable part is movable to the fixing part. The movable part reciprocates to the fixing part in a vibrating direction by interaction between the coil and the magnet. The magnet includes a first magnet and a second magnet joined to each other such that their magnetization directions are opposite to each other, and the magnet is disposed to be radially inwardly spaced apart from the coil. The elastic supporting part is fixed at its one end to the fixing part and at its other end to the movable part. The elastic supporting part has a structure for cantilevering the movable part. At least one of the first and the second magnets includes a depressed portion in its joining surface.
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公开(公告)号：US20190151894A1
公开(公告)日：2019-05-23
申请号：US16194414
申请日：2018-11-19
摘要： A vibration actuator includes: a movable part including one of a coil or a magnet; a fixing part including the other one of the coil or the magnet; and an elastic supporting part supporting the movable part to the fixing part. The movable part reciprocates to the fixing part in a vibrating direction by interaction between the coil and the magnet. The magnet is disposed to be radially inwardly spaced apart from the coil. The elastic supporting part is fixed at its one end to the fixing part and at its other end to the movable part. The elastic supporting part has a structure for cantilevering the movable part. The movable part includes a weight provided on a free-end side of the movable part and a weight connecting part to which the weight is connected. The weight is fixed to the weight connecting part by a fixing member.
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公开(公告)号：US20220123640A1
公开(公告)日：2022-04-21
申请号：US17561954
申请日：2021-12-26
申请人： Yuki TAKAHASHI , Chikara SEKIGUCHI , Shigeyuki SHIMOMURA , Daisuke KODAMA , Yuta YOSHII , Yasutaka KITAMURA , Shigenori INAMOTO
发明人： Yuki TAKAHASHI , Chikara SEKIGUCHI , Shigeyuki SHIMOMURA , Daisuke KODAMA , Yuta YOSHII , Yasutaka KITAMURA , Shigenori INAMOTO
IPC分类号： H02K33/06
摘要： A vibration actuator has a movable body and a fixing body. The movable body includes: a disk-shaped magnet; annular cores each having an opening at a center thereof; and spring stopper weight parts, and stacked such that the magnet is disposed at a center of the movable body, the annular cores is fixed on front and rear surfaces of the magnet in its axial direction, and the spring stopper weight parts are joined with the annular cores at the opening. Each spring stopper weight part includes: a spring fixing part connecting to one of the elastic support parts; a joining protrusion part inserted into the opening of one of the annular cores; and a weight body part provided between the spring fixing part and the joining protrusion part, having a larger diameter, and disposed to face and join with an annular surface of one of the annular cores.
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公开(公告)号：US20220103055A1
公开(公告)日：2022-03-31
申请号：US17487184
申请日：2021-09-28
摘要： A vibration actuator includes a fixing body including a base part, and a magnetic suction force generation part provided at a core on which a coil is wound; a movable body including a connecting part, and a suction part suctioned by the magnetic suction force generation part through energization to the coil; and a plurality of elastic support parts. The suction part is disposed in a vicinity of a magnetic pole of the core of the magnetic suction force generation part with an air gap between the suction part and the magnetic pole in a vibration direction, and the suction part is disposed at a center portion in the vibration direction of the movable body supported by the plurality of elastic support parts.
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公开(公告)号：US20220103052A1
公开(公告)日：2022-03-31
申请号：US17449294
申请日：2021-09-29
申请人： Yoshihiro GOMI , Takanori KATO , Yuki TAKAHASHI
发明人： Yoshihiro GOMI , Takanori KATO , Yuki TAKAHASHI
IPC分类号： H02K33/16
摘要： Provided is a vibration actuator including: a movable body including a coil and a core around which the coil is wound; a fixing body including a magnet; and a shaft part turnably supporting the movable body with respect to the fixing body on a side of the one end part of the core. The movable body reciprocatingly and rotationally vibrates around the shaft part with respect to the fixing body by cooperation between the coil to be energized and the magnet. The magnet is disposed to face the other end part of the core in an extending direction of the core when energization is not performed. The magnet includes two magnetic poles having different polarities and arranged in a reciprocating and rotational vibration direction. A weight part is disposed in a notch on a side of the other end part of the core or in the coil.
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