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    • 3. 发明申请
    • NONRESONANT SUPERCONDUCTIVE FILTER STRUCTURES
    • 非阻尼超导滤波器结构
    • WO1995004384A1
    • 1995-02-09
    • PCT/US1993007264
    • 1993-08-02
    • CONDUCTUS, INC.WITHERS, Richard, S.
    • CONDUCTUS, INC.
    • H01P01/213
    • H01P1/2135
    • Bandpass filters and filter banks which use tapped planar superconductive delay lines are disclosed. Tapping is performed by backward-wave couplers which, in one embodiment, are of approximately equal length in a given channel. The low losses of superconductors make the use of tapped delay lines practical. Because tapped delay line filters are nonresonant structures, the stored energy density within the filter will be much less than that in a conventional coupled-resonator filter. This permits even a compact superconducting filter to handle large power densities like those common in telecommunications filter banks. Appropriate weighting of the taps reduces side-lobe response, and deviations from linear phase are compensated by predistortions in the tap weighting.
    • 公开了使用抽头平面超导延迟线的带通滤波器和滤波器组。 攻击由反向波耦合器执行,在一个实施例中,该波形耦合器在给定的通道中具有大致相等的长度。 超导体的低损耗使得使用轻敲延迟线实用。 由于抽头延迟线滤波器是非共振结构,滤波器内存储的能量密度将远低于常规耦合谐振滤波器中的能量密度。 这甚至允许紧凑型超导滤波器处理诸如电信滤波器组中常见的大功率密度。 抽头的适当加权减少了旁瓣响应,并且通过抽头加权中的预失真来补偿与线性相位的偏差。
    • 4. 发明申请
    • DIGITAL OPTICAL RECEIVER WITH INSTANTANEOUS JOSEPHSON CLOCK RECOVERY CIRCUIT
    • 数字光接收器,具有瞬时JOSEPHSON时钟恢复电路
    • WO1998008307A1
    • 1998-02-26
    • PCT/US1997014748
    • 1997-08-21
    • CONDUCTUS, INC.
    • CONDUCTUS, INC.KAPLOUNENKO, VsevolodDUBASH, Noshir, B.ZHANG, YongmingGOSHAL, Uttam
    • H03L07/24
    • H03L7/24H03B15/00H03K3/38
    • A digital optical receiver and clock recovery circuit for use in detecting and retiming optical data transmitted at rates up to and exceeding 40 Gb/s. The receiver is made, in part, of superconducting Josephson junctions. The receiver includes an optical signal detector, an SFQ (single flux quantum) transition detector for converting the signal from the photodetector into a stream of single flux quantum signals, and a clock recovery circuit. The clock recovery circuit includes a superconducting ring oscillator in which an SFQ pulse rotates and provides a clock signal at an output of the oscillator. When a pulse from the stream of single flux quantum pulses arrives from the transition detector, two pulses are generated in the ring oscillator. One of the pulses eliminates the rotating SFQ pulse and the second pulse replaces the rotating SFQ pulse, thereby recovering the phase of the clock signal in one bit.
    • 一种数字光接收器和时钟恢复电路,用于检测和重新定时传输速率高达40 Gb / s的光数据。 接收器部分由超导约瑟夫逊接头制成。 接收机包括光信号检测器,用于将来自光电检测器的信号转换成单通量量子信号流的SFQ(单通量量子跃迁检测器)和时钟恢复电路。 时钟恢复电路包括一个超导环形振荡器,其中SFQ脉冲旋转并在振荡器的输出处提供时钟信号。 当来自单通量量子脉冲流的脉冲从转换检测器到达时,在环形振荡器中产生两个脉冲。 其中一个脉冲消除了旋转的SFQ脉冲,第二个脉冲取代了旋转的SFQ脉冲,从而以一位的方式恢复了时钟信号的相位。
    • 5. 发明申请
    • NUCLEAR MAGNETIC RESONANCE PROBE COIL AND METHOD OF MAKING SAME
    • 核磁共振探头线圈及其制造方法
    • WO1996039636A1
    • 1996-12-12
    • PCT/US1996008459
    • 1996-06-03
    • CONDUCTUS, INC.
    • CONDUCTUS, INC.BREY, William, W.ANDERSON, Weston, A.WONG, Wai, HaFUKS, Luiz, FelipeKOTSUBO, Vincent, Y.WITHERS, Richard, S.
    • G01R33/34
    • G01R33/3628G01R33/34G01R33/34007G01R33/34023G01R33/34092G01R33/5604H01G4/40
    • A resonant coil for nuclear magnetic spectroscopy and microscopy and a method of making the coil are provided. The coil is in the form of nested, interrupted loops of a conductive material forming a distributed inductive element and having a plurality of capacitive elements with capacitance distributed over the periphery of the loops. The coil is preferably formed as a thin film of a superconductive material on an electrically nonconductive substrate. In one aspect of the invention, the current density in the coil is kept constant by providing an inductive element and a set of tapered, interidigitated capacitors having a uniform gap therebetween. The invention maximizes the current-carrying capacity of the coil. The invention further provides a method of making the coil by patterning a film of a conductive material on a substrat into a coil having a lower resonant frequency than the desired frequency of the final coil, placing the coil in an apparatus where it is exposed to increasing current, preferably within a magnetic field such as will be used during operation and finally trimming the coil to the desired resonant frequency trimmed by removal of part of the capacitive element of the coil.
    • 提供用于核磁谱和显微镜的共振线圈和制造线圈的方法。 线圈是形成分布式感应元件的导电材料的嵌套的,中断的环路的形式,并且具有多个电容元件,电容分布在环的周边上。 线圈优选地在非导电衬底上形成为超导材料的薄膜。 在本发明的一个方面,线圈中的电流密度通过提供一个电感元件和一组在其间具有均匀间隙的锥形的分叉电容器而保持恒定。 本发明使线圈的载流能力最大化。 本发明还提供了一种制造线圈的方法,该方法是将基底上的导电材料的膜图案化成具有比最终线圈的期望频率低的谐振频率的线圈,将线圈放置在暴露于增加的设备中 电流,优选地在诸如将在操作期间使用的磁场中,并且最后将线圈修整到通过去除线圈的电容元件的一部分来修整的期望谐振频率。
    • 6. 发明申请
    • IMPROVED BARRIER LAYERS FOR OXIDE SUPERCONDUCTOR DEVICES AND CIRCUITS
    • 用于氧化物超导体器件和电路的改进的障碍层
    • WO1994007270A1
    • 1994-03-31
    • PCT/US1993008657
    • 1993-09-14
    • CONDUCTUS, INC.CHAR, KookrinGEBALLE, Theodore, H.
    • CONDUCTUS, INC.
    • H01L39/22
    • H01L39/225H01L27/18Y10S505/702Y10S505/781
    • A conductor suitable for use in oxide-based electronic devices and circuits is disclosed. Metallic oxides having the general composition AMO3, where A is a rare or alkaline earth or an alloy of rare or alkaline earth elements, and M is a transition metal, exhibit metallic behavior and are compatible with high temperature ceramic processing. Other useful metallic oxides have compositions (A1-xA'x)B2(M1-yM'y)3O7-(delta) or (A1-xA''x)m(M1-yM'y)nO2m+n, where 0
    • 公开了一种适用于氧化物基电子器件和电路的导体。 具有一般组成AMO3的金属氧化物,其中A是稀土或碱土金属或稀土或碱土金属的合金,M是过渡金属,具有金属性能并与高温陶瓷加工兼容。 其他有用的金属氧化物具有组成(A1-xA'x)B2(M1-yM'y)3O7-(delta)或(A1-xA'x)m(M1-yM'y)nO2m + n,其中0 < = x,y <= 1和0.5 <= m,n <= 3,A和A'是稀土或碱土或稀土或碱土的合金,A“和B”是碱土金属,碱土金属 元素,稀土元素,稀土元素合金或碱土金属和稀土元素的合金,M和M'是过渡金属元素或过渡金属元素的合金。 金属氧化物在氧化物超导体以及通常用于生长氧化物超导体的衬底和缓冲层上外延生长。 氧化物超导体也可以外延生长在这些金属氧化物上。 当正常材料是所公开的类型的金属氧化物时,可以获得高温超导体材料中超导体 - 正常超导体(SNS)结的性能的大幅提高。 在优选实施方案中,导电氧化物CaRuO 3用作作为超导体的YBa2Cu3O7-(delta)的SNS结中的正常材料。 在这种类型的接合处制造的77K功能的直流超导量子干涉器件(SQUID)表现出大的调制和低噪声。
    • 7. 发明申请
    • FREESTANDING STRUCTURES OF PEROVSKITE-TYPE OXIDE MATERIALS
    • PEROVSKITE型氧化物材料的自由结构
    • WO1994005046A2
    • 1994-03-03
    • PCT/US1993007933
    • 1993-08-24
    • CONDUCTUS, INC.LEE, Luke, P.BURNS, Michael, J.CHAR, KookrinLIANG, Guo-ChunROWELL, John, M.
    • CONDUCTUS, INC.
    • H01L39/24
    • H01L39/143H01L39/2464H01L41/33
    • A freestanding YBa2Cu3O7- delta or ferroelectric air bridge is disclosed. This structure is useful for membrane detectors and can be extended to applications in which the presence of a substrate can degrade electronic, thermal, and optical properties of the superconductor or ferroelectric structure. The air bridge is fabricated using conventional photolithography, ion-beam dry etching, and selective wet etching. In the preferred embodiment, a sacrificial dielectric layer is deposited between a supportive substrate and a layer of superconducting material. The dielectric layer is later etched away in selected regions to form the air bridge. Step coverage of epitaxial bridge layers has been achieved without significant degradation of the superconducting properties of YBa2Cu3O7- delta layers. Alternatively, YBa2Cu3O7- delta can be used as the sacrificial layer when a ferroelectric such as Pb(Zr,Ti)O3 is the desired air bridge material.
    • 公开了一种独立的YBa2Cu3O7-delta或铁电空气桥。 该结构对于膜检测器是有用的,并且可以扩展到其中存在基底可能降低超导体或铁电结构的电子,热和光学性质的应用。 空气桥是使用常规光刻,离子束干蚀刻和选择性湿蚀刻制造的。 在优选实施例中,牺牲电介质层沉积在支撑衬底和超导材料层之间。 电介质层随后在选定的区域中被蚀刻掉以形成空气桥。 已经实现了外延桥接层的阶跃覆盖,而不会显着降低YBa2Cu3O7-δ层的超导性能。 或者,当诸如Pb(Zr,Ti)O 3的铁电体是期望的气桥材料时,YBa2Cu3O7-δ可用作牺牲层。
    • 9. 发明申请
    • IMPROVED SQUID COUPLING STRUCTURE
    • 改进的SQUID耦合结构
    • WO1995007470A2
    • 1995-03-16
    • PCT/US1993008496
    • 1993-09-07
    • CONDUCTUS, INC.COLCLOUGH, Mark, S.
    • CONDUCTUS, INC.
    • G01R33/035
    • G01R33/0356
    • A coupling structure is disclosed for coupling a feedback signal to a superconducting quantum interference device (SQUID) by mutual inductance. In one embodiment the SQUID loop (A) is shielded from external magnetic fields perpendicular to it by a superconducting ground plane (B) at all points except for the pick-up loop (C). A feedback signal is coupled to the SQUID loop (A) by a feedback loop (D) which has a mutual inductance with the SQUID loop (A). During operation, the feedback loop (D) conducts a current in only one direction around the SQUID loop (A). This geometry ensures that the SQUID loop (A) is shielded from external magnetic fields, except at the pick-up loop (C), by the ground plane, and is balanced against fields parallel to the ground plane. The magnetic field produced by the current in the feedback coil (D) is small far from the SQUID (A). The feedback loop (D) is connected to exterior feedback electronics.
    • 公开了一种通过互感将反馈信号耦合到超导量子干涉装置(SQUID)的耦合结构。 在一个实施例中,除了拾波回路(C)之外的所有点,SQUID回路(A)通过超导接地平面(B)屏蔽与其垂直的外部磁场。 反馈信号通过与SQUID回路(A)具有互感的反馈回路(D)耦合到SQUID回路(A)。 在操作期间,反馈回路(D)仅在SQUID回路(A)周围的一个方向上传导电流。 这种几何形状确保了SQUID环路(A)除了接地平面外的外部磁场(除了拾波回路(C))外,并且与平行于接地平面的场平衡。 由反馈线圈(D)中的电流产生的磁场离SQUID(A)很小。 反馈回路(D)连接到外部反馈电子设备。