Assignee: Conductus, Inc.

Location: Sunnyvale, CA
No. of patents: 38

Number	Title	Issue Date
7437187	Superconductive filter with capacitive patches providing reduced cross-coupling A resonator of a planar circuit type is provided for receiving a signal from an input end and transmitting a signal to an output end. The resonator includes: (a) a dielectric substrate; (b) a ground plane including a layer of conductive material formed on the bottom...	10/14/2008
7317364	Varactor tuning for a narrow band filter including an automatically controlled tuning system A method and apparatus for providing dynamic and remote tuning of a cryo-cooled bandpass filter is disclosed. The device includes resonator element and a voltage sensitive element as part of the capacitance in a narrow band filter circuit. A varactor such as a GaAs ...	01/08/2008
7181259	Resonator having folded transmission line segments and filter comprising the same A resonator and filter including the resonator is disclosed. The resonator (100) includes an open conductive loop (100) with folded transmission line segments (124, 134) extending from the adjacent ends of the loop. Of each transmission line seg...	02/20/2007
7117025	Varactor tuning for a narrow band filter A method and apparatus for providing dynamic and remote tuning of a cryo-cooled bandpass filter is disclosed. The device includes resonator element and a voltage sensitive element as part of the capacitance in a narrow band filter circuit. A varactor such as a GaAs ...	10/03/2006
7071797	Method and apparatus for minimizing intermodulation with an asymmetric resonator A method and apparatus to control intermodulation in a circuit for filtering over the air signals by creating an asymmetric resonator is disclosed. By creating the asymmetric resonator, the intermodulation from out of band signals is reduced while keeping the filter...	07/04/2006
6791430	Resonator tuning assembly and method A device and method for tuning a planar filter through a wide range of center frequencies are disclosed. The tuning assembly includes a superconductive tuning tip and an actuator configured and adapted to move the tuning tip through a sufficient range of distances f...	09/14/2004
6792299	Device approximating a shunt capacitor for strip-line-type circuits A closed conductive loop for use in planar circuits to realize shunt capacitors instead of conductive patches is disclosed. The closed conductive loop may be formed on a planar substrate or extend to multiple conductive layers in a multi-layer circuit. The use of cl...	09/14/2004
6527866	Apparatus and method for deposition of thin films An apparatus for forming a multicomponent thin film, such as a superconducting thin film, on a substrate includes a holder for holding at least one substrate and a deposition/reaction vessel. The deposition/reaction vessel has at least three zones, each z...	03/04/2003
6529750	Microstrip filter cross-coupling control apparatus and method The present invention provides for a method and apparatus to control non-adjacent cross-coupling in a micro-strip filter. In instances of weak cross-coupling, such as a filter circuit on a high dielectric constant substrate material (e.g., LaAIO3	03/04/2003
6438394	Frequency dependent inductor apparatus and method for a narrow-band filter The present invention provides for a super-narrow band filter using frequency dependent L-C components. The invention utilizes a frequency dependent L-C circuit with a positive slope k for the inductor values as a function of frequency. The positive k val...	08/20/2002
6331805	On-chip long Josephson junction (LJJ) clock technology One aspect of the invention is directed to on-chip high-frequency, low-jitter clock circuits including long Josephson junction (LJJ) oscillators usable as clock sources. LJJ oscillators embodying the invention may be formed using either "linear" or "annul...	12/18/2001
5968876	Compressable tuning element for microwave resonators and method of making same A tuning mechanism for tuning a resonant circuit is provided. The tuning mechanism comprises a spring pin having a superconductive, dielectric or magnetic tuning tip attached thereto. The spring pin is slidably inserted into a filter package wall through ...	10/19/1999
5963351	Digital optical receiver with instantaneous Josephson clock recovery circuit 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 ...	10/05/1999
5831278	Three-terminal devices with wide Josephson junctions and asymmetric control lines A three-terminal device constructed from a Josephson junction with one or more asymmetric control lines is disclosed. The device is constructed with high temperature superconducting materials. The junction can be a bicrystal, SNS (Superconducting-Normal-S...	11/03/1998
5767043	Multiple squid direct signal injection device formed on a single layer substrate A low-noise directly coupled dc SQUID magnetometer is disclosed. The magnetometer provides for single layer fabrication and is particularly applicable to high-Tc superconductors operating at 77 Kelvin. A pair of dc SQUIDs are connected and bias...	06/16/1998
5696392	Barrier layers for oxide superconductor devices and circuits 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 transi...	12/09/1997
5656937	Low-noise symmetric dc SQUID system having two pairs of washer coils and a pair of Josephson junctions connected in series A multiple loop dc SQUID configuration with input and modulation circuitry configured for high-symmetry and low-noise operation is disclosed. The configuration is adaptable to implementation using standard thin film circuit fabrication technology. The SQU...	08/12/1997
5651016	Ultrahigh speed laser An apparatus and method for obtaining ultra-high speed operation of a semiconductor laser diode is presented. The invention utilizes any of a variety of conventional laser diodes in combination with cooling means for operation of the laser at temperatures...	07/22/1997
5619140	Method of making nuclear magnetic resonance probe coil A method of making a an NMR coil is provided. A coil is patterned of a film of a conductive material on a substrate. The coil mask is designed so that the resultant coil will have a lower resonant frequency than the desired frequency of the final coil. Th...	04/08/1997
5600243	Magnetically shielded magnetic sensor with squid and ground plane A coupling structure 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 grou...	02/04/1997
5594342	Nuclear magnetic resonance probe coil with enhanced current-carrying capability The conductive material in an RF coil disposed in the polarizing field of an NMR apparatus in miminized and the current density at each point in the coil kept constant by providing an inductive element and a set of tapered, interidigtated capacitors havin...	01/14/1997
5585723	Inductively coupled superconducting coil assembly The invention provides highly sensitive NMR probes for spectroscopy and microscopy. Thin-film superconducting coils on planar substrates are inductively coupled to form an RF transmitter/receiver. Two embodiments are illustrated. The first, which is parti...	12/17/1996
5565778	Nuclear magnetic resonance probe coil A resonant coil for nuclear magnetic spectroscopy and microscopy is provided, in which 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...	10/15/1996
5532592	Squid control apparatus with non-cryogenic flux-locked loop disposed in close proximity to the squid SQUID control apparatus for controlling multiple SQUID probes includes a plurality of head units each corresponding to a respective SQUID probe, each of the head units including a non-cryogenic modulated flux-locked loop feedback circuit operating at a re...	07/02/1996
5508613	Apparatus for cooling NMR coils In Nuclear Magnetic Resonance (NMR) spectroscopy and microscopy, noise from the receiver coil of the probe limits sensitivity. This noise may be reduced by cooling the receiver coil. Noise may be even further reduced by use of a superconducting receiver c...	04/16/1996
5455594	Internal thermal isolation layer for array antenna An array antenna includes a means of thermally isolating the feed network from the space illuminated by the antenna. Filtering layers are incorporated into the structure between the feed and the radiating patches. These filtering layers are transparent to...	10/03/1995
5449659	Method of bonding multilayer structures of crystalline materials A method for producing multilayer structures comprised of materials with incompatible processing parameters is disclosed. A bonding layer of arbitrary dielectric constant is applied to each of two substructures. Each substructure is composed of a substrat...	09/12/1995
5366953	Method of forming grain boundary junctions in high temperature superconductor films A novel method of producing weak-link grain boundary Josephson junctions in high temperature superconducting thin films is disclosed. These junctions are reliably and reproducibly formed on uniform planar substrates (10) by the action of a seed layer (40)...	11/22/1994
5351007	Superconducting magnetic resonance probe coil A broadband matching network for coupling a magnetic resonance probe to a preamplifier utilizes superconducting matching coils and superconducting locatable shields to detect very weak magnetic signals over a broad bandwidth. The superconducting matching ...	09/27/1994
5280013	Method of preparing high temperature superconductor films on opposite sides of a substrate A superconducting electronic circuit device, useful when impedance matching is desired, especially suited to microwave frequencies, consisting of a thin dielectric layer with superconducting layers on both sides. A superconductor such as Yttrium Barium Co...	01/18/1994
5276398	Superconducting magnetic resonance probe coil A magnetic resonance probe coil is fabricated using a superconductive material for the coil. Three distinct embodiments are described: a single-layer coil with no crossovers; a dual-film coil wherein the capacitors are formed through an intermediate diele...	01/04/1994
5241828	Cryogenic thermoelectric cooler A Seebeck effect thermoelectric cooler, operative at cryogenic temperatures, in which two materials having different Seebeck coefficients are in electrical contact so that current flow thereacross cools the junction. One or both of the materials comprise ...	09/07/1993
5233500	Package for cascaded microwave devices A lobed package for the protection and electrical connection of microwave devices is presented. The distinctive shape of the package allows several large devices to be connected in series in a coplanar arrangement. In the preferred embodiment, a base laye...	08/03/1993
5219826	Superconducting junctions and method of making same A superconducting Josephson junction is created in high Tc superconducting film, with a bridge connecting two superconducting banks, by subjecting the bridge to a tunneling electron current from a sharp electrode close to the bridge. The tunnel...	06/15/1993
5207884	Superconductor deposition system To deposit a plurality of substances on a substrate while the substrate remains in a low pressure oxygen environment, several target carriers are mounted around the edge of a disc and the disc is rotated to position the targets at the focal point of a fix...	05/04/1993
5157466	Grain boundary junctions in high temperature superconductor films Grain boundary, weak-link junctions are formed at a predermined location of a uniform, planar substrate by depositing superconducting film on two sections of the substrate. The film is grown as a bicrystal having two distinct areas of superconducting film...	10/20/1992
5126533	Substrate heater utilizing protective heat sinking means A substrate heater for the production of superconducting films utilizing a nickel alloy block uniformly heated with a resistance heating element fully immersed in a brazing material that fills a recess in the block. Massive electric power connectors surro...	06/30/1992
5090819	Superconducting bolometer A superconducting transition edge bolometer is constructed using high critical temperature conducting films by stabilizing a substrate of magnesium oxide or sapphire with a silicon base that is bonded to the substrate using a thermally conductive bonding ...	02/25/1992

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Assignee: Conductus, Inc.