公开(公告)号：US5336941A

公开(公告)日：1994-08-09

申请号：US925019

申请日：1992-08-05

Applicant: Ichiro Ishida

Inventor： Ichiro Ishida

IPC: H01L39/22 ,  H03K3/38 ,  H03K19/195

CPC classification number: H03K19/1956 ,  H03K3/38 ,  Y10S505/864

Abstract: According to the present invention, there is provided a superconducting circuit including a Josephson tunnel junction 1 and a load resistor 2 connected in parallel to the Josephson tunnel junction, in which a current source 5 is connected to the input terminal for the Josephson tunnel junction 1 and which has a pulse generator 3 in order to superimpose a pulse current to the current i from the current source 5.As the input signal, a current pulse is given to the current i within the range of below the critical current of the Josephson tunnel junction by means of the foregoing pulse generator 3 so that an excellent separation of the input and output is achieved without using any magnetic coupling circuit.

Abstract translation: 根据本发明，提供了一种超导电路，其包括并联连接到约瑟夫逊隧道结的约瑟夫逊隧道结1和负载电阻器2，其中电流源5连接到约瑟夫逊隧道结1的输入端 并且其具有脉冲发生器3，以便从电流源5向电流i叠加脉冲电流。作为输入信号，在低于约瑟夫森隧道的临界电流的范围内给电流i施加电流脉冲 通过上述脉冲发生器3连接，从而在不使用任何磁耦合电路的情况下实现输入和输出的良好分离。

公开(公告)号：US4603263A

公开(公告)日：1986-07-29

申请号：US468908

申请日：1983-02-23

Applicant: Shuichi Tahara ,  Jun'ichi Sone

Inventor： Shuichi Tahara ,  Jun'ichi Sone

IPC: H03K3/38

CPC classification number: H03K3/38 ,  Y10S505/864

Abstract: A Josephson pulse generator of the current injection type is composed of a first group of N (N.gtoreq.2) resistors, one end of each being connected together, the other ends of two of the N resistors being connected to first and second nodes. A second group of serially connected N-1 resistors is connected between the first and second nodes and to the other ends of the N-2 resistors in the first group not connected to the first and second nodes. N Josephson junctions are each connected between a reference potential and the other end of a different one of the N resistors. Two additional Josephson junctions, each having one end thereof connected, respectively, to the first node and the second node is provided along with an additional resistor connected between the other end of the Josephson junction connected to the first node and the reference potential.

Abstract translation: 电流注入型约瑟夫森脉冲发生器由第一组N（N> / = 2）电阻组成，其中一端连接在一起，其中两个N电阻的另一端连接到第一和第二节点 。 第二组串联N-1电阻器连接在第一和第二节点之间，并连接到第一组中不连接到第一和第二节点的N-2电阻器的另一端。 N个约瑟夫逊结各自连接在参考电位和不同N个电阻器的另一端之间。 两个附加的约瑟夫逊结，其一端分别连接到第一节点和第二节点以及连接在连接到第一节点的约瑟夫逊结的另一端和参考电位之间的附加电阻器。

公开(公告)号：US4902908A

公开(公告)日：1990-02-20

申请号：US146160

申请日：1988-01-20

Applicant: Yutaka Harada

Inventor： Yutaka Harada

IPC: H03K19/195

CPC classification number: H03K19/1952 ,  Y10S505/858 ,  Y10S505/861 ,  Y10S505/864

Abstract: A superconducting circuit comprises a quantum flux parametron. In the superconducting circuit, at least one of two Josephson devices is a voltage controlled superconducting device, the critical current of which can be controlled by applying a voltage. By adjusting the applied voltage, the critical currents of the two Josephson devices can be equalized. If an input signal is used as the applied voltage, the input signal can be isolated from an output signal. And further, if both critical currents of the two Josephson devices are increased after an input signal is supplied, the input signal can be stably amplified.

Abstract translation: 超导电路包括量子通量参数。 在超导电路中，两个约瑟夫逊器件中的至少一个是压控超导器件，其临界电流可以通过施加电压来控制。 通过调整施加的电压，两个约瑟夫逊器件的临界电流可以相等。 如果输入信号用作施加的电压，输入信号可以与输出信号隔离。 此外，如果在提供输入信号之后两个约瑟夫逊器件的两个临界电流都增加，则可以稳定地放大输入信号。

公开(公告)号：US4506166A

公开(公告)日：1985-03-19

申请号：US381653

申请日：1982-05-24

Applicant: Junichi Sone

Inventor： Junichi Sone

IPC: H03K3/38 ,  H03K5/04

CPC classification number: H03K3/38 ,  Y10S505/864

Abstract: A pulse generator utilizes a Josephson junction gate circuit having first and second control current paths for conducting control currents in opposite directions. An input signal applied to one of the control current paths will transform the Josephson junction device to the voltage state resulting in the leading edge of a pulse output from a branch circuit connected in parallel with the gate current path of the Josephson junction device, and the same input pulse passed through a delay circuit will be applied in the opposite direction to the other control current path to thereby switch the Josephson junction device back to the zero voltage state and cause the trailing edge of the pulse output. The delay device can be a .pi. circuit, a single additional Josephson junction device having its control current path connected either in series or in parallel with the one control current path of the first Josephson junction device, or a plurality of cascaded Josephson junction devices.

Abstract translation: 脉冲发生器利用具有第一和第二控制电流路径的约瑟夫逊结门电路，用于在相反的方向上传导控制电流。 施加到控制电流路径之一的输入信号将使约瑟夫逊结器件转换到电压状态，导致从与约瑟夫逊结器件的栅极电流通路并联连接的分支电路输出的脉冲的前沿，并且 通过延迟电路的相同输入脉冲将以与另一个控制电流路径相反的方向施加，从而将约瑟夫逊结器件切换回零电压状态，并引起脉冲输出的后沿。 延迟装置可以是pi电路，单个附加的约瑟夫逊结装置，其控制电流路径与第一约瑟夫逊结装置的一个控制电流路径串联或并联连接，或者多个级联的约瑟夫逊结装置。

公开(公告)号：US4373138A

公开(公告)日：1983-02-08

申请号：US232011

申请日：1981-02-06

Applicant: Theodore A. Fulton ,  Arthur F. Hebard

Inventor： Theodore A. Fulton ,  Arthur F. Hebard

IPC: H03K3/38

CPC classification number: H03K3/38 ,  Y10S505/864

Abstract: Described is a DC powered flip-flop logic or memory element (i.e., circuit) which comprises two Josephson junction gates J.sub.1 and J.sub.2 which operate individually in the latching mode. In one logic state, the gate J.sub.1 is at V.sub.1 =O while J.sub.2 is at V.sub.2 .noteq.O. In the other logic state, the roles of the two junctions are reversed. The two junctions are interconnected by a passive network such that the switching of J.sub.2, say, from V.sub.2 =O to V.sub.2 .noteq.O induces a current-voltage transient on J.sub.1 which returns it to V.sub.1 =O, and conversely.

Abstract translation: 描述了一种直流供电的触发器逻辑或存储元件（即，电路），其包括两个在锁存模式下分别操作的约瑟夫逊结门J1和J2。 在一个逻辑状态下，门J1为V1 = 0，而J2为V2 NOTEQUAL O.在另一个逻辑状态下，两个结的作用相反。 两个结通过无源网络相互连接，使得J2的切换从V2 = O到V2 NOTEQUAL O在J1上引起电流电压瞬变，将其返回到V1 = 0，反之亦然。

公开(公告)号：US4249094A

公开(公告)日：1981-02-03

申请号：US965327

申请日：1978-12-01

Applicant: Theodore A. Fulton

Inventor： Theodore A. Fulton

IPC: H03K19/195 ,  H03K19/20

CPC classification number: H03K19/1952 ,  Y10S505/864

Abstract: A DC powered, self-resetting Josephson junction logic circuit relying on relaxation oscillations is described. A pair of Josephson junction gates are connected in series, a first shunt is connected in parallel with one of the gates, and a second shunt is connected in parallel with the series combination of gates. The resistance of the shunts and the DC bias current bias the gates so that they are capable of undergoing relaxation oscillations. The first shunt forms an output line whereas the second shunt forms a control loop. The bias current is applied to the gates so that, in the quiescent state, the gate in parallel with the second shunt is at V=O, and the other gate is undergoing relaxation oscillations. By controlling the state of the first gate with the current in the output loop of another identical circuit, the invert function is performed.

Abstract translation: 描述了依赖于松弛振荡的直流供电的自复位约瑟夫逊结逻辑电路。 一对约瑟夫逊结门串联连接，第一分路与其中一个栅极并联连接，第二分路与门的串联组合并联连接。 分流器的电阻和直流偏置电流使栅极偏置，使得它们能够经历弛豫振荡。 第一分路形成输出线，而第二分路形成控制回路。 偏置电流被施加到栅极，使得在静止状态下，与第二分路并联的栅极为V = O，而另一栅极正在经历弛豫振荡。 通过利用另一相同电路的输出回路中的电流来控制第一门的状态，执行反转功能。

公开(公告)号：US20070281861A1

公开(公告)日：2007-12-06

申请号：US11806175

申请日：2007-05-30

Applicant: Yoshihiro Ishimaru ,  Yoshinobu Tarutani ,  Keiichi Tanabe

Inventor： Yoshihiro Ishimaru ,  Yoshinobu Tarutani ,  Keiichi Tanabe

IPC: H01L39/24

CPC classification number: H01L27/18 ,  G01R33/0354 ,  H01L39/225 ,  H01L39/2496 ,  Y10S505/861 ,  Y10S505/864 ,  Y10S505/865 ,  Y10S505/874

Abstract: The present invention provides a superconducting device including a substrate, a first superconducting pattern formed on the substrate, an insulating pattern formed on the first superconducting pattern, and a second superconducting pattern formed at the uppermost level in the multilayered superconducting pattern. A barrier layer of a Josephson junction is formed on the lower side of, or within the second superconducting pattern. The second superconducting pattern constitutes a circuit element on the insulating pattern.

Abstract translation: 本发明提供一种超导装置，其包括基板，形成在基板上的第一超导图案，形成在第一超导图案上的绝缘图案，以及形成在多层超导图案中的最上层的第二超导图案。 约瑟夫逊结的阻挡层形成在第二超导图案的下侧或内部。 第二超导图案构成绝缘图案上的电路元件。

公开(公告)号：US4918328A

公开(公告)日：1990-04-17

申请号：US190955

申请日：1988-05-03

Applicant: Feng Kuo

Inventor： Feng Kuo

IPC: H03K17/58 ,  H03K17/92 ,  H03K19/195

CPC classification number: H03K17/92 ,  H03K17/58 ,  H03K19/1956 ,  Y10S505/864

Abstract: In a time domain reflectometer a first step generator may include two branches of elements which are current sensitive and will produce a gap voltage if the current exceeds a specific threshold. Each branch may include either Josephson junction devices or tunnel diodes. When a trigger signal plus a bias current exceed a threshold value a first one of the elements in a first branch produces a gap voltage and diverts current to the second branch. The current causes all of the elements in the second branch to produce gap voltages and the current is diverted back to the first branch to switch the states of the remaining elements of the first branch. Once all of the elements in both branches produce gap voltages, the total signal produced by these elements is transmitted to a third output branch. The circuit produces a fast step signal and lends itself to expansibility whereby the amplitude of the step signal can be varied by varying the number of elements in the branches of the circuit.

Abstract translation: 在时域反射计中，第一级发生器可以包括电流敏感元件的两个分支，并且如果电流超过特定阈值，则产生间隙电压。 每个分支可以包括约瑟夫逊结装置或隧道二极管。 当触发信号加上偏置电流超过阈值时，第一分支中的第一个元件产生间隙电压并将电流转向第二分支。 电流导致第二分支中的所有元件产生间隙电压，并且电流被转回到第一分支以切换第一分支的剩余元件的状态。 一旦两个分支中的所有元素产生间隙电压，则由这些元件产生的总信号被传输到第三输出分支。 该电路产生快速步进信号并使其本身具有可扩展性，由此可以通过改变电路的分支中的元件的数量来改变阶跃信号的幅度。

公开(公告)号：US4144465A

公开(公告)日：1979-03-13

申请号：US811800

申请日：1977-06-30

Applicant: Sadeg M. Faris

Inventor： Sadeg M. Faris

IPC: H03K5/1532 ,  H01L39/22 ,  H03K3/38 ,  H03K17/92 ,  H03K5/153

CPC classification number: H03K3/38 ,  H03K17/92 ,  Y10S505/864

Abstract: A self-resetting Josephson device circuit is disclosed which responds to one transition of a circuit input by producing a short output pulse, and which resets itself in response to another, complementary transition of said circuit input. The Josephson device circuit includes a first and second Josephson device, one coupling a dc source to a current sink, said second connected in series with an inductor between said current source and sink. The circuit input, which is of a square waveform, is applied, in series, to first control circuits of the first and second Josephson devices. The second Josephson device has a second control circuit to which dc is applied of polarity opposite to the current in the first control circuit and of an amplitude substantially the same as the amplitude in the first control circuit when said circuit input is present. An output circuit includes a third Josephson device coupled in series with a second inductor and a resistor, with the series circuit coupled to said dc source. With the output circuit including the third Josephson device connected across the first Josephson device, an output pulse is produced across the second inductance and resistance on a high going transition of the circuit input. On the other hand, if the output circuit is connected across the second Josephson device then an output taken across the second inductor and resistance is produced in response to a low going transition of the circuit input. In either case, the circuit responds to the complementary transition by resetting itself.

Abstract translation: 公开了一种自复位约瑟夫逊器件电路，其通过产生短输出脉冲来响应电路输入的一个转换，并且响应于所述电路输入的另一个互补转换而自身复位。 约瑟夫逊器件电路包括第一和第二约瑟夫逊器件，一个将直流源耦合到电流吸收器，所述第二和第二约瑟夫逊器件与所述电流源和吸收器之间的电感器串联连接。 具有方波形的电路输入串联地施加到第一和第二约瑟夫逊器件的第一控制电路。 第二约瑟夫逊装置具有第二控制电路，在所述第二控制电路中施加与第一控制电路中的电流相反的极性的直流，并且当存在所述电路输入时，施加与第一控制电路中的振幅基本相同的幅度。 输出电路包括与第二电感器和电阻器串联耦合的第三约瑟夫逊器件，其中串联电路耦合到所述直流源。 通过包括连接在第一约瑟夫逊器件上的第三约瑟夫逊器件的输出电路，在电路输入的高电平转变时，跨越第二电感和电阻产生输出脉冲。 另一方面，如果输出电路连接在第二约瑟夫逊器件上，则响应于电路输入的低电平跳变产生跨越第二电感器和电阻的输出。 在任何一种情况下，电路通过重置本身来响应互补转换。

公开(公告)号：US3983419A

公开(公告)日：1976-09-28

申请号：US537803

申请日：1974-12-31

Applicant: Frank F. Fang

Inventor： Frank F. Fang

IPC: H03M1/12 ,  G11C11/44 ,  G11C27/02 ,  H01L39/22 ,  H03K7/02 ,  H03M1/00 ,  H03K3/38 ,  G08C9/00

CPC classification number: G11C27/02 ,  H01L39/223 ,  H03M1/60 ,  Y10S505/864

Abstract: An analog waveform transducing circuit is disclosed which includes a pair of superconductive circuits connected in parallel between a pair of terminals. One of these circuits includes a Josephson tunnelling device and the other includes inductance (which may be distributed) which is greater than the inductance of the Josephson device. An analog signal is applied to one of said terminals. Means are provided for switching said Josephson device between normal and superconductive states to thereby trap one or more flux quanta. An output means is coupled to one of the two circuits.In one embodiment the means for switching the Josephson device responds to the analog signal level only, that is the control current is fixed (or zero). In this embodiment a number of pulses may be produced which can be related to the signal level, so that the circuit is an analog to digital converter.In another embodiment the means for switching said Josephson device includes a control means which normally results in said Josephson device being in a resistive state so that substantially all of said analog signal flows in said second circuit. When the means for switching switches the Josephson device to the superconductive state the second circuit will pass a portion of the analog signal equal to the analog signal flowing therein prior to the switching of the Josephson device. That portion of the analog signal reflecting variations in the analog signal subsequent to switching will flow in the first circuit. This condition will persist for so long as the Josephson device remains in the superconductive state. Substantially all the analog signal will again flow in the second circuit after the Josephson device is again switched to the normal state by the means for switching. This embodiment performs a sample and hold function in that the analog signal level at the time of switching is maintained in the second circuit regardless of variations (within proper limits) of the analog signal level. The current flowing in the second circuit may then be measured by any utilization means to measure the analog signal level at the time of switching.

Abstract translation: 公开了一种模拟波形转换电路，其包括在一对端子之间并联连接的一对超导电路。 这些电路中的一个包括约瑟夫逊隧道装置，另一个包括大于约瑟夫逊装置的电感的电感（其可以被分配）。 模拟信号被施加到所述终端之一。 提供了用于在正常和超导状态之间切换所述约瑟夫逊器件从而捕获一个或多个通量量子的装置。 输出装置耦合到两个电路之一。