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8050648 |
Superconducting digital mixer
Digital mixers which permit mixing of asynchronous signals may be constructed of Rapid Single Flux Quantum (RSFQ) logic elements. The logic elements may include an RSFQ non-destructive readout cell...
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7969178 |
Method and apparatus for controlling qubits with single flux quantum logic
In one embodiment, the disclosure relates to a method and apparatus for controlling the energy state of a qubit by bringing the qubit into and out of resonance by coupling the qubit to a flux...
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7170960 |
Instantaneous clock recovery circuit
A clock recovery circuit (10) for a superconductor system that enables the phase of a system clock to be instantaneously reset without any pulse interaction. The clock recovery circuit (10)...
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6529092 |
Superconductor filter and radio transmitter-receiver
A superconductor filter includes a superconductor receiver filter of a planar transmission line structure including a signal input line, a resonator element and a signal output line and configured...
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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...
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6078223 |
Discriminator stabilized superconductor/ferroelectric thin film local oscillator
A tunable local oscillator (10) with a tunable circuit (12) that includes a resonator (16) and a transistor (14) as an active element for oscillation. Tuning of the circuit (12) is achieved with an...
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5760736 |
Direct X-band waveform generator
X-band signals are generated from the output of a Josephson junction array which is excited by a first RF frequency waveform digitally implemented in a data stream generated by a digital waveform...
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5757243 |
High frequency system including a superconductive device and temperature controlling apparatus
An effective high frequency oscillator is made of a plurality of Josephson devices. A high frequency converter as a high frequency circuit is made of the high frequency oscillator, nonlinear...
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5450040 |
Gaussian-beam oscillator for microwave and millimeter waves
A Gaussian-beam oscillator for microwave and millimeter wave comprising a negative resistance amplifier circuit which produces and amplifies a high-frequency signal, a resonator consisting of a...
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5339457 |
Superconductive electromagnetic wave mixer and superconductive electromagnetic wave mixing apparatus employing the same
The present invention relates to a superconductive electromagnetic wave mixer comprising a local-oscillator section and a receiving section, said receiving section serving as a section at which an...
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5309117 |
Superconducting ring resonator microwave oscillator for operating as a remote temperature sensor
A remote temperature sensor includes a microwave oscillator which generates n output signal having a frequency which is proportional to the temperature of the environment in which it is located....
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5289139 |
Push-push ring resonator oscillator
A push-push microwave oscillator has two branch oscillators fabricated of a transistor and transmission line elements extending from terminals of the transistor, and a resonator which is fabricated...
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5204641 |
Conducting plane resonator stabilized oscillator
A conducting plane resonator (10) is used to stabilize an oscillating means (12) typically operating at microwave frequencies. The conducting plane resonator (10) is in proximity to the oscillating...
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5191236 |
System and circuits using Josephson junctions
An electronic clock has a single Josephson junction connected in parallel to a resonant circuit, which is a delay line with a matching resistance at the input end to provide series termination. The...
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5166647 |
Low-noise oscillator
A low-noise oscillator has a resonant circuit for generating a signal at a desired frequency. A linear amplifier and a limiter are electrically connected to the resonant circuit at first, second...
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5118660 |
Superconducting low-noise oscillator
A low-noise cryogenic oscillator has a resonant circuit formed of superconducting material for generating a signal at a desired frequency. A linear amplifier and a limiter are electrically...
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5114912 |
Two-dimensional, Josephson-array, voltage-tunable, high-frequency oscillator
A two-dimensional array of Josephson junctions is used as a high-frequency oscillator capable of emitting coherent power of predetermined frequencies since the geometry of the two-dimensional array...
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4901038 |
Low-noise oscillator using superconducting nonlinear element
A low-noise oscillator includes a resonator constituted by a coil, a capacitor and a sustaining coil which are made of superconductivity material and maintained at a low temperature below the...
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4754384 |
Triggerable superconductive switching means, and apparatus comprising the means
Disclosed is a novel switching device. In its currently preferred embodiment the device comprises a conductive path that comprises a superconductive section, with the remainder of the path being...
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4733182 |
Josephson junction Q-spoiler
An automatic Q-spoiler comprising at least one Josephson tunnel junction connected in an LC circuit for flow of resonant current therethrough. When in use in a system for detecting the magnetic...
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4470023 |
Coherent array of Josephson oscillators with external bias leads
A coherent array of Josephson oscillators is provided. Individual hysteresis-free Josephson junctions are longitudinally arranged in a line and have such a spacing as to substantially eliminate...
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4468635 |
Transmission line biased coherent array of Josephson oscillators
A coherent array of Josephson oscillators is provided. Individual hysteresis-free Josephson junctions are longitudinally arranged in a gap of a central conductor in a line and have such a spacing...
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4344052 |
Distributed array of Josephson devices with coherence
Josephson devices are distributed in series in a transmission line structure in which electromagnetic waves are used to synchronize the dynamics of the Josephson devices in order to achieve...
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4249094 |
Relaxation oscillation logic in Josephson junction circuits
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...
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4181902 |
Fluxon oscillators utilizing a ring shaped Josephson junction
The fluxon oscillators for producing electromagnetic radiation having a wavelength shorter than the shortest radio waves, but longer than the longest infrared radiation, may comprise two closely...
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4168441 |
Picosecond pulse generator utilizing a Josephson junction
A picosecond pulse generator for producing pulses having widths in the or of 10-12 seconds utilizes a Josephson junction that has an external load resistor connected in shunt therewith by a...
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4117503 |
Josephson interferometer structure which suppresses resonances
Josephson interferometers contain inductive, capacitive and resistive components, and, as a result, such devices are subject to the presence of relatively high amplitude resonances similar to those...
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4081573 |
Method for preparing superconductive Nb3 Sn layers on niobium surfaces for high-frequency applications
A method for preparing superconductive Nb3 Sn layers on niobium surfaces for high frequency applications in which a defined reaction zone which contains a tin source and the niobium surface is...
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3978351 |
Quantum interference Josephson logic devices
A quantum interference Josephson junction logic device is disclosed which comprises three or more junctions connected in parallel which are capable of carrying Josephson current and includes means...
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3970965 |
Injection locked Josephson oscillator systems
Various injection locking arrangements employing Josephson oscillators are disclosed for achieving signal amplification, frequency conversion and the detection of extremely low level signals at...
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3916340 |
Multimode oscillators
A multimode oscillator is disclosed, comprising an array of interconnected oscillator elements distributed over at least two dimensions. The oscillator elements include a grid or network of...
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3913120 |
Thin film resistors and contacts for circuitry
Contacts and resistors are provided for circuitry which are very resistant to interdiffusion and which have good stability. In particular, contacts to superconductive circuitry and resistors for...
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3906538 |
Techniques for minimizing resonance amplitudes of Josephson junction
The resonant conditions of non-linear Josephson junctions are reduced by shaping the junctions differently than a conventional rectangular shape. For a given value of L/λJ, where L is the junction ...
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3863078 |
JOSEPHSON DEVICE PARAMETRONS
Josephson tunneling devices are used as parametrons in circuits for logic and memory. Parametron circuits are used as input devices to conventional pulsed Josephson tunneling device circuitry, and...
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3848259 |
MULTICONTROL LOGIC GATE DESIGN
A Josephson tunnelling device with means for producing magnetic fields which intercept the device. These fields establish screening currents in the device. The field producing means includes means...
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3822381 |
MULTIMODE OSCILLATORS FOR PATTERN RECOGNITION
A multimode oscillator is disclosed, comprising an array of interconnected oscillator elements distributed over at least two dimensions. The oscillator elements include a grid or network of...
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3818390 |
SUPERCONDUCTIVE TUNABLE FILTER WITH NARROW BAND AND BROAD TUNING RANGE
A passive, high performance, superconductive LC loop tunable over a very broad tuning range and being capable of a high degree of rejection of undesired signals and wherein inductance and...
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3778893 |
METHOD OF FABRICATING A COHERENT SUPERCONDUCTING OSCILLATOR
A superconducting oscillator for generating millimeter and infrared radiation and a method for fabricating these oscillators. A Josephson junction (weak link or tunneling juntion) is located...
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3751721 |
SNS SUPERCURRENT DEVICE
An improved SNS supercurrent device comprises a pair of superconductive regions, a relatively thick insulative region contiguous with and separating the superconductive regions from one another,...
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3736527 |
PRECISION VOLTAGE BIAS FOR JOSEPHSON OSCILLATORS
A Josephson junction irradiated with signal energy of frequency f and curt biased to a particular radio frequency induced step in its I-V characteristic is employed as a voltage standard to...
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3733526 |
LEAD ALLOY JOSEPHSON JUNCTION DEVICES
A superconducting Josephson junction tunnel device having in particular lead alloy electrodes (Pb-In and Pb-In-Sn) and a very precisely defined and dense tunnel barrier comprising an oxide of the...
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3731158 |
ELECTRODE-CARBON-ELECTRODE JUNCTIONS
Quantum mechanical tunneling barriers, and non-linear gates are comprised of disordered carbon and integrated as the middle layer in electrode-carbon-electrode junctions.
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3725819 |
SUPERCURRENT DEVICES WITH ENHANCED SELF-FIELD EFFECTS
A supercurrent device comprising a pair of weak-link regions connected in a superconducting loop is driven by a current source. In series with the loop is an inductor for generating a magnetic...
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3702956 |
JOSEPHSON JUNCTIONS
The invention relates to a Josephson type junction and, according to the invention, this is constituted by a layer 1 of semiconducting material inserted between two superconductors 2 and 3. These...
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3697826 |
JOSEPHSON JUNCTION HAVING AN INTERMEDIATE LAYER OF A HARD SUPERCONDUCTING MATERIAL
Superconducting element using the Josephson effect formed by first and second layers of a soft superconducting material having a third layer of a hard superconducting material interposed...
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3671848 |
FREQUENCY CONVERSION WITH JOSEPHSON JUNCTIONS
Josephson junctions are utilized to accomplish frequency conversion--eitherown conversion or up conversion. The junction is coupled to a resonant cavity and simultaneously irradiated by an external...
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3643176 |
SUPERCONDUCTOR ELECTRO-MAGNETIC RADIATION DEVICE
An injection-type junction superconducting radiation device, operated below the transition temperature of the superconductor. The junction is formed from a normal metal, an oxide insulative film...
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3628184 |
SUPERCONDUCTING OSCILLATORS AND METHOD FOR MAKING THE SAME
A superconducting oscillator for generating millimeter and infrared radiation and a method for fabricating these oscillators. A Josephson junction (weak link or tunneling junction) is located...
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3600644 |
SUPERCONDUCTOR-NORMAL METAL CIRCUIT ELEMENTS EXHIBITING JOSEPHSON EFFECTS
This disclosure relates to a low temperature circuit element exhibiting radio frequency or AC Josephson effects comprising a member constructed of metal capable of superconductivity at low...
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3573661 |
SNS SUPERCURRENT JUNCTION DEVICES
A supercurrent device includes a superconductor-normal metal-superconductor (SNS) structure which has a current-voltage characteristic analogous to that of Josephson tunnel junctions but relies on...
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