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    • 2. 发明授权
    • Superconducting single flux quantum modulator circuit
    • 超导单通量子量子调制电路
    • US07501877B2
    • 2009-03-10
    • US11808337
    • 2007-06-08
    • Futoshi FurutaKazuo Saitoh
    • Futoshi FurutaKazuo Saitoh
    • H03K17/92
    • H03K17/92H03K17/14H03K17/16H03M3/02H03M3/418H03M3/43H03M3/456
    • Objects of the present invention are to provide an integration circuit which produces no integration leak so that the bit accuracy is improved in a sigma-delta modulation circuit or a delta modulator circuit, which is based on a single flux quantum circuit that uses a flux quantum as an information carrier, and to provide a method for reducing thermal noise and quantization noise. According to the present invention, an integration circuit is formed by Josephson junctions and an inductor to reduce the integration leak, and a plurality of modulator circuits are connected to one another so as to add up each output. As a result, it is possible to reduce the influence of thermal noise exerted upon the bit accuracy, the thermal noise having no correlativity to one another. Moreover, by changing the density or phase of a SFQ pulse to be supplied to the Josephson junctions of the integration circuit, the correlativity of quantization noise between the outputs of the modulator circuits is eliminated so that the bit accuracy is improved.
    • 本发明的目的是提供一种不产生积分泄漏的积分电路,使得在Σ-Δ调制电路或增量调制器电路中提高比特精度,该Δ-Δ调制电路或增量调制器电路基于使用通量量子的单通量量子电路 作为信息载体,并且提供减少热噪声和量化噪声的方法。 根据本发明,由约瑟夫逊结和电感器形成积分电路以减少积分泄漏,并且多个调制器电路彼此连接,以便将每个输出相加。 结果,可以减少施加在比特精度上的热噪声的影响,热噪声彼此不相关。 此外,通过改变要提供给积分电路的约瑟夫逊结的SFQ脉冲的密度或相位,消除了调制器电路的输出之间的量化噪声的相关性,从而提高了位精度。
    • 3. 发明申请
    • Superconducting single flux quantum modulator circuit
    • 超导单通量子量子调制电路
    • US20080129368A1
    • 2008-06-05
    • US11808337
    • 2007-06-08
    • Futoshi FurutaKazuo Saitoh
    • Futoshi FurutaKazuo Saitoh
    • H03K17/92
    • H03K17/92H03K17/14H03K17/16H03M3/02H03M3/418H03M3/43H03M3/456
    • Objects of the present invention are to provide an integration circuit which produces no integration leak so that the bit accuracy is improved in a sigma-delta modulation circuit or a delta modulator circuit, which is based on a single flux quantum circuit that uses a flux quantum as an information carrier, and to provide a method for reducing thermal noise and quantization noise. According to the present invention, an integration circuit is formed by Josephson junctions and an inductor to reduce the integration leak, and a plurality of modulator circuits are connected to one another so as to add up each output. As a result, it is possible to reduce the influence of thermal noise exerted upon the bit accuracy, the thermal noise having no correlativity to one another. Moreover, by changing the density or phase of a SFQ pulse to be supplied to the Josephson junctions of the integration circuit, the correlativity of quantization noise between the outputs of the modulator circuits is eliminated so that the bit accuracy is improved.
    • 本发明的目的是提供一种不产生积分泄漏的积分电路,使得在Σ-Δ调制电路或增量调制器电路中提高比特精度,该Δ-Δ调制电路或增量调制器电路基于使用通量量子的单通量量子电路 作为信息载体,并且提供减少热噪声和量化噪声的方法。 根据本发明,由约瑟夫逊结和电感器形成积分电路以减少积分泄漏,并且多个调制器电路彼此连接,以便将每个输出相加。 结果,可以减少施加在比特精度上的热噪声的影响,热噪声彼此不相关。 此外,通过改变要提供给积分电路的约瑟夫逊结的SFQ脉冲的密度或相位,消除了调制器电路的输出之间的量化噪声的相关性,从而提高了位精度。
    • 5. 发明授权
    • Superconductor semiconductor integrated circuit
    • 超导体半导体集成电路
    • US07129869B2
    • 2006-10-31
    • US10862418
    • 2004-06-08
    • Futoshi FurutaKazuo Saitoh
    • Futoshi FurutaKazuo Saitoh
    • H03M1/00
    • H03M1/0624G11C7/06H03M1/1215
    • In an A/D converter having a single flux quantum circuit having a flux quantum as an information carrier, a superconducting amplifier circuit driven by an AC current, and a semiconductor circuit, the operations of the circuits are synchronized with each other and a data signal from the single flux quantum circuit is transmitted to the semiconductor circuit.An AC current as the power source of a superconducting amplifier circuit is inputted as a master clock signal to the single flux quantum circuit and the semiconductor circuit to synchronize the operations of the circuits with the master clock signal. The single flux quantum circuit has a clock signal frequency multiplier circuit, a demultiplexing circuit and a memory circuit.
    • 在具有作为信息载体的通量量子的单通量量子电路的A / D转换器,由AC电流驱动的超导放大电路和半导体电路的情况下,电路的动作彼此同步,数据信号 从单通量量子电路传输到半导体电路。 将作为超导放大器电路的电源的AC电流作为主时钟信号输入到单通量量电路和半导体电路,以使电路的操作与主时钟信号同步。 单通量量电路具有时钟信号倍频电路,解复用电路和存储电路。
    • 10. 发明授权
    • Superconducting device including plural superconducting electrodes
formed on a normal conductor
    • 超导装置包括形成在正常导体上的多个超导电极
    • US5442195A
    • 1995-08-15
    • US136984
    • 1993-10-18
    • Kazuo SaitohToshikazu NishinoMutsuko Hatano
    • Kazuo SaitohToshikazu NishinoMutsuko Hatano
    • H01L39/22H01L27/18H01L39/24B05D5/12G11C11/44H01B12/00
    • H01L27/18Y10S505/832
    • A superconducting device may include a superconducting weak link equipped with plural superconducting devices that are used as input-output terminals formed on the same plane and at least one current source for applying current to at least one of these superconducting electrodes. A superconducting device suitable for high integration can be realized as it enables structuring of a superconducting weak link 1 equipped with plural superconducting electrodes 101, 102, 103 and 104 that can be used as input-output terminals and changing symmetry of superconducting electrode arrangement through the form of a normal conductor 201 which is forming a superconducting weak link. In addition, when this superconducting device is used as a quasi-particle injection type device, a superconducting device with plural superconducting electrodes that can be used for a gate electrode, drain electrode or control electrode can be realized. Further, a superconducting device equipped with new functions (e.g. motion as a neuron device) which are capable of high integration can be realized by utilizing these characteristics. Furthermore, being a proximity effect type, superconducting weak link has an advantage of realizing an ultra highspeed, low electricity consuming switching device.
    • 超导装置可以包括配备有多个超导装置的超导弱连接器,所述多个超导装置用作形成在同一平面上的输入 - 输出端子和用于向这些超导电极中的至少一个施加电流的至少一个电流源。 可以实现适用于高集成度的超导装置,因为它能够构成配备有可用作输入 - 输出端子的多个超导电极101,102,103和104的超导弱连接件1,并且通过所述超导电极装置改变超导电极装置的对称性 形成超导弱连接的正常导体201的形式。 此外,当该超导装置用作准粒子注入型装置时,可以实现具有可用于栅电极,漏电极或控制电极的多个超导电极的超导装置。 此外,可以通过利用这些特性来实现配备有能够高集成度的新功能(例如作为神经元装置的运动)的超导装置。 此外,作为接近效应型,超导弱连接具有实现超高速,低耗电开关器件的优点。