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    Superconducting constant voltage generator
    1.
    发明授权
    Superconducting constant voltage generator 失效
    超导电压发电机

    公开(公告)号：US3696287A

    公开(公告)日：1972-10-03

    申请号：US3696287D

    申请日：1970-06-01

    Applicant: FORD MOTOR CO

    Inventor： SILVER ARNOLD H ,  ZIMMERMAN JAMES E

    IPC: G01R19/252 ,  G05F1/12

    CPC classification number: G05F1/12 ,  G01R19/252 ,  Y10S505/843

    Abstract: A superconducting circuit that may be utilized as an ultra-high sensitivity voltmeter or a generator generating a voltage having a substantially constant amplitude. A superconductive material having a weak link positioned therein with a voltage of unknown magnitude applied across the weak link. An oscillator has its output coupled to the weak link so that the output signal of the oscillator generates an oscillating current through it. The voltage of unknown magnitude causes an oscillating current to be generated through the weak link with a frequency proportional to the unknown magnitude of the voltage. The weak link mixes the frequency of the two currents and a demodulator detects the frequency of the oscillating current produced by the voltage of unknown magnitude. When the circuit is to be employed as a voltmeter, a frequency meter may be connected to the demodulating means which has a scale readable in voltage units. If the circuit is to be employed as a generator of a voltage having a substantially constant amplitude, a standard frequency may be fed to a comparator that also receives the output from the demodulator. The output from the comparator may be fed back to the weak link and the amplitude of the voltage having a substantially constant magnitude may be read out across a circuit component connected to the superconducting material.

    Abstract translation: 可以用作超高灵敏度电压表的超导电路或产生具有基本恒定振幅的电压的发生器。 具有位于其中的弱连接的超导材料具有未知量的电压施加在弱连接件上。 振荡器的输出耦合到弱链路，使得振荡器的输出信号通过其产生振荡电流。 未知幅度的电压导致通过弱链路产生振荡电流，其频率与电压的未知幅度成比例。 弱链路混合两个电流的频率，解调器检测由未知幅度的电压产生的振荡电流的频率。 当电路用作电压表时，频率计可以连接到解调装置，其具有电压单位可读的刻度。 如果电路被用作具有基本恒定振幅的电压的发生器，则标准频率可以被馈送到也接收来自解调器的输出的比较器。 来自比较器的输出可以被反馈到弱链路，并且可以跨连接到超导材料的电路部件读出具有基本恒定幅度的电压的幅度。

    Voltage measuring apparatus employing a josephson junction
    2.
    发明授权
    Voltage measuring apparatus employing a josephson junction 失效
    使用JOSEPHSON JUNCTION的电压测量装置

    公开(公告)号：US3622881A

    公开(公告)日：1971-11-23

    申请号：US3622881D

    申请日：1969-03-21

    Applicant: FORD MOTOR CO

    Inventor： SILVER ARNOLD H ,  ZIMMERMAN JAMES E

    IPC: G01R19/00 ,  G01R19/252 ,  H03B15/00 ,  G01R19/26 ,  H03C1/00

    CPC classification number: G01R19/0084 ,  G01R19/252 ,  H03B15/00 ,  Y10S505/843

    Abstract: This disclosure relates to a superconducting circuit means that may be utilized as an ultra-high sensitivity voltmeter or a generator generating a voltage having a substantially constant amplitude. It comprises a superconductive material having a weak link positioned therein with means for applying a voltage of unknown magnitude across the weak link. An oscillator has its output coupled to the weak link so that the output signal of the oscillator generates an oscillating current through it. The voltage of unknown magnitude causes an oscillating current to be generated through the weak link with a frequency proportional to the unknown magnitude of the voltage. The weak link mixes the frequency of the two currents and a demodulating means detects the frequency of the oscillating current produced by the voltage of unknown magnitude. When the circuit means is to be employed as a voltmeter, a frequency meter may be connected to the demodulating means which has a scale readable in voltage units. If the circuit means is to be employed as a generator of a voltage having a substantially constant amplitude, a standard frequency may be fed to a comparator that also receives the output from the demodulating means. The output from the comparator may be fed back through suitable means to the weak link and the amplitude of the voltage having a substantially constant magnitude may be read out across a circuit component connected to the superconducting material.

    Magnetic field coupled superconducting quantum interference system
    3.
    发明授权
    Magnetic field coupled superconducting quantum interference system 失效
    磁场耦合超导量子干扰系统

    公开(公告)号：US3609714A

    公开(公告)日：1971-09-28

    申请号：US3609714D

    申请日：1969-12-22

    Applicant: FORD MOTOR CO

    Inventor： SILVER ARNOLD H ,  ZIMMERMAN JAMES E

    IPC: G11C11/44 ,  H03K3/38 ,  G11C11/42

    CPC classification number: G11C11/44 ,  H03K3/38 ,  Y10S505/874

    Abstract: This disclosure relates to an electrical circuit component including a superconductive quantum interference device having a loop of superconducting material with a weak link positioned therein. The loop of superconducting material and the weak link enclose an area for the reception of magnetic flux. Means are positioned adjacent the superconductive quantum interference device for producing a varying magnetic field at the device to induce a current therein. The magnitude of the varying magnetic field is sufficient to induce a critical current in the weak link. As a result, the current induced in the superconductive quantum interference device alternately increases and decreases as the number of flux quanta changes in the area enclosed by the superconducting material and weak link.

    Magnetic field coupled superconducting quantum interference system
    6.
    发明授权
    Magnetic field coupled superconducting quantum interference system 失效

    公开(公告)号：US3573759A

    公开(公告)日：1971-04-06

    申请号：US3573759D

    申请日：1969-01-24

    Applicant: FORD MOTOR CO

    Inventor： ZIMMERMAN JAMES E ,  SILVER ARNOLD H

    IPC: G11C11/44 ,  H03F19/00

    CPC classification number: G11C11/44 ,  H03F19/00 ,  Y10S505/874

    Abstract: This disclosure relates to an electrical circuit component including a superconductive quantum interference device having a loop of superconducting material with a weak link positioned therein. The loop of superconducting material and the weak link enclose an area for the reception of magnetic flux. Means are positioned adjacent the superconductive quantum interference device for producing a varying magnetic field at the device to induce a current therein. The magnitude of the varying magnetic field is sufficient to induce a critical current in the weak link. As a result, the current induced in the superconductive quantum interference device alternately increases and decreases as the number of flux quanta changes in the area enclosed by the superconducting material and weak link. The disclosure also relates to a process of inducing a nonlinear electric current in a superconductive quantum interference device having a loop of superconducting material with a weak link positioned therein. It comprises placing this device in a superconducting state and locating an inductive member magnetically adjacent thereto. A varying current is applied to the inductive device to induce a current in the superconductive quantum interference device. The magnitude of this varying current is sufficient to induce a critical current in the weak link, and, as a result, the current alternately increases to the value of the critical current through the weak link and decreases to some lower value as the number of flux quanta changes in the area enclosed by the superconducting material and weak link.

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