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| Number | Title | Issue Date |
| 8111083 | Quantum processor One embodiment of the invention includes a quantum processor system. The quantum processor system includes a first resonator having a first characteristic frequency and a second resonator having a second characteristic frequency greater than the first characteristic... | 02/07/2012 |
| 8102185 | Systems, devices, and methods for controllably coupling qubits A transverse coupling system may include a first qubit, a second qubit, a first conductive path capacitively connecting the first qubit and the second qubit, a second conductive path connecting the first qubit and the second qubit, and a dc SQUID connecting the firs... | 01/24/2012 |
| 7800395 | Systems, devices, and methods for controllably coupling qubits A coupling system to couple a first and a second qubit in response to a state of the coupling system that may be set by two input signals. ... | 09/21/2010 |
| 7786748 | Method and apparatus for signal inversion in superconducting logic gates In one embodiment, the disclosure relates to a single-flux quantum logic gate capable of providing output from one of the two inputs, which is also known as the A and NOT B gate. The logic gate includes a first input gate and a second input gate for respectively rec... | 08/31/2010 |
| 7750664 | Digital programmable phase generator A programmable phase shifter is constructed of Rapid Single Flux Quantum (RSFQ) logic elements. The logic elements may include an RSFQ inverter and an RSFQ T flip-flop. A digital word comprising N bits is used to control the amount of phase shift and the phase shift... | 07/06/2010 |
| 7724020 | Single flux quantum circuits Superconducting single flux quantum circuits are disclosed herein, each having at least one Josephson junction which will flip when the current through it exceeds a critical current. Bias current for the Josephson junction is provided by a biasing transformer instea... | 05/25/2010 |
| 7508230 | Digital programmable phase generator A programmable phase shifter is constructed of Rapid Single Flux Quantum (RSFQ) logic elements. The logic elements may include an RSFQ inverter and an RSFQ T flip-flop. A digital word comprising N bits is used to control the amount of phase shift and the phase shift... | 03/24/2009 |
| 7443720 | Method and circuit for reading quantum state A single electron-transistor is used to read out charge states of two coupled qubits formed by two Cooper pair boxes. Detection is made about a gate voltage shift of the peak of the current that flows in the single electron transistor in accordance with the charge s... | 10/28/2008 |
| 7378865 | Superconducting circuit for generating pulse signal A superconducting circuit includes a first transformer to produce a first alternating-current output at a secondary-side inductor, a second transformer to produce a second alternating-current output at a secondary-side inductor, a first pulse generating circuit to p... | 05/27/2008 |
| 7328115 | Quality assurance IC having clock trimmer A quality assurance integrated circuit for a print controller is provided. The IC has a memory, a system clock having a ring oscillator for generating a clock signal, clock trim circuitry for trimming the clock signal generated by the system clock and a processor. T... | 02/05/2008 |
| 7274705 | Method and apparatus for reducing clock speed and power consumption A system for reducing clock speed and power consumption in a network chip. The system has a core that transmits and receives signals at a first clock speed. A receive buffer is in communication with the core and configured to transmit the signals to the core at the ... | 09/25/2007 |
| 7268713 | Superconducting circuit A circuit includes a latch circuit including a Josephson junction and configured to perform a latch operation based on a hysteresis characteristic in response to a single flux quantum, a load circuit including load inductance and load resistance and coupled to an ou... | 09/11/2007 |
| 7268576 | Superconducting qubit with a plurality of capacitive couplings A first qubit having a superconducting loop interrupted by a plurality of Josephson junctions is provided. Each junction interrupts a different portion of the superconducting loop and each different adjacent pair of junctions in the plurality of Josephson junctions ... | 09/11/2007 |
| 7253701 | Multiplexed amplifier Multiple sensor signals are used to modulate an equal number of frequency-spaced carrier signals in a directional parametric upconverting amplifier. Basically, the carrier signals are separated in a cascaded or parallel configuration of narrow frequency passbands, w... | 08/07/2007 |
| 7253654 | Superconducting qubits having a plurality of capacitive couplings A first qubit having a superconducting loop interrupted by a plurality of Josephson junctions is provided. Each junction interrupts a different portion of the superconducting loop and each different adjacent pair of junctions in the plurality of Josephson junctions ... | 08/07/2007 |
| 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) includes a Josephson transmission line oscillator loop (14 | 01/30/2007 |
| 7129870 | Superconducting latch driver circuit generating sufficient output voltage and pulse-width A circuit includes a latch circuit including a Josephson junction and configured to perform a latch operation based on a hysteresis characteristic in response to a single flux quantum, a load circuit including load inductance and load resistance and coupled to an ou... | 10/31/2006 |
| 7106093 | Semiconductor device A semiconductor device having a plurality of cascaded IC's (14, 15, 16), wherein the matching impedance between a signal transmission path (12) connected to an external signal transmission path and an input-side or output-side IC (14, 16) is set... | 09/12/2006 |
| 7075171 | Superconducting system, superconducting circuit chip, and high-temperature superconducting junction device with a shunt resistor A superconducting system that includes an interface circuit capable of making the best use of a high-speed superconducting circuit and a high-speed semiconductor circuit. A multi-chip module in which an Nb superconducting circuit having josephson junctions formed by... | 07/11/2006 |
| 7046038 | Upward and downward pulse stretcher circuits and modules The invention includes digital logic devices with extremely skewed trip points and reset circuitry for rapidly propagating signal edges. Embodiments of skewed logic devices in accordance with the present invention include inverters, buffers, NOR gates and NAND gates... | 05/16/2006 |
| 7002366 | Superconducting constant current source An on-chip current regulator for a superconducting logic circuit isolates the superconducting logic circuit from external noise, reduces the effects of process fluctuations on the performance of the logic circuit and significantly reduces total circuit power require... | 02/21/2006 |
| 6968487 | User available body scan chain A method of accessing the testing means in a Field Programmable Gate Array (“FPGA”) comprised of a plurality of functional groups (“FGs”) comprising: inputting a function netlist defining a user circuit; compiling said function netlist; and generating a logi... | 11/22/2005 |
| 6960929 | Superconductive crossbar switch A superconductor crossbar switch for connecting a plurality of inputs with a plurality of outputs, including a switching cell having an input, an output and a circuit for connecting the input with the output for bidirectionally transmitting data therebetween. The co... | 11/01/2005 |
| 6930320 | Resonant controlled qubit system A method is provided for entangling a quantum state of a qubit with a quantum state of a resonant control system. The method comprises tuning the resonant control system, which is capacitively or inductively coupled to the qubit, to a resonant frequency for a period... | 08/16/2005 |
| 6922066 | Sampler and method of measuring a waveform of a current with jitters reduced In a sampler for use in measuring a waveform of an electric signal, a measurement target current is given as the electric signal to a sampler chip 11 and is also used to produce a trigger current Itr for determining measurement timing on the sampler chip. A c... | 07/26/2005 |
| 6917216 | Superconductor output amplifier A single flux quantum (SFQ) pulse is generated (502) by injecting a superconductor output signal as a first signal at a “start” input (108) coupled to a superconductor delay element (104). The SFQ pulse is reflected (504) back and for... | 07/12/2005 |
| 6900454 | Resonant controlled qubit system A circuit comprising a superconducting qubit and a resonant control system that is characterized by a resonant frequency. The resonant frequency of the control system is a function of a bias current. The circuit further includes a superconducting mechanism having a ... | 05/31/2005 |
| 6836141 | Superconductor ballistic RAM A superconductor memory array (10) has a high associated throughput with low power dissipation and a simple architecture. The superconductor memory array (10) includes memory cells (12a-12d) arranged in a row-column format a... | 12/28/2004 |
| 6784451 | Multi-junction phase qubit In one embodiment, a two-junction phase qubit includes a superconducting loop and two Josephson junctions separated by a mesoscopic island on one side and a bulk loop on another side. The material forming the superconducting loop is a superconducting material with a... | 08/31/2004 |
| 6734699 | Self-clocked complementary logic A superconducting self-clocked complementary SFQ logic family. The basic element of the circuit is a plurality of Josephson junctions and a control inductance coupled across a pair of voltage rails. An important aspect of the invention relates to the use of voltage ... | 05/11/2004 |
| 6724216 | Rapid single-flux-quantum logic circuit and rapid single-flux-quantum output conversion circuit A rapid single-flux-quantum RSFQ logic circuit includes a first circuit portion having a first end grounded and having in-series connected first and second Josephson junctions. A second circuit portion has a first end grounded and has in-series connected third and f... | 04/20/2004 |
| 6703857 | Integrated circuit of superconducting circuit blocks and method of designing the same An integrated circuit comprises plural superconducting circuit blocks connected through superconducting wiring strips, and each superconducting circuit block includes at least one superconducting logic circuit, constant input/output circuits connected bet... | 03/09/2004 |
| 6518786 | Combinational logic using asynchronous single-flux quantum gates An asynchronous SFQ logic cell that is amenable to being used in combinational logic circuits. Rather than encode each digital logic bit as one SFQ pulse, each logic bit is encoded as a series of SFQ pulses. As such, merge and join circuits can be used fo... | 02/11/2003 |
| 6486756 | Superconductor signal amplifier A superconductor signal amplifier which receives an extremely small high-frequency signal having a frequency of tens of GHz generated in a superconductive circuit, amplifies the voltage of the high-frequency signal without a decrease in frequency, and out... | 11/26/2002 |
| 6486694 | Universal delay-insensitive logic cell The invention provides a universal, delay-insensitive RSFQ logic cell comprising two input circuits and two clock circuits, each containing a plurality of Josephson elements. The two input circuits generate and sustain persistent currents in response to i... | 11/26/2002 |
| 6420895 | High-sensitivity, self-clocked receiver for multi-chip superconductor circuits A receiver (50) for providing chip-to-chip communication in a superconductor integrated circuit. The receiver (50) includes a detector circuit (52) for asynchronously receiving an input current, a splitter circuit (60) connected to the detector circuit (5... | 07/16/2002 |
| 6310488 | Superconductive single flux quantum logic circuit In a superconductive single flux quantum logic circuit having two superconductive closed loops each comprising a Josephson junction and one or more inductors, a load inductance part is comprised of an inductor and a Josephson junction and two or more mean... | 10/30/2001 |
| 6294946 | Switching circuit with intermittently loaded charged capacitance A switching circuit, comprising: a first node for receiving a first voltage; a second node 502 for providing an output; a third node for receiving a second voltage; a capacitance 506 coupled between the second node 502 and the third node; means for interm... | 09/25/2001 |
| 6242939 | Superconducting circuit having superconductive circuit device of voltage-type logic and superconductive circuit device of fluxoid-type logic device selectively used therein A superconducting circuit device of a voltage-type logic device is large in current driving capability and, accordingly, electric power consumption; however, the switching speed is not so fast, and a superconducting circuit device of a fluxoid-type logic ... | 06/05/2001 |
| 6188236 | Arrangement and method relating to digital information in superconducting circuits A logic circuit arrangement includes signal input and signal output devices and a number of SFQ circuits having Josephson junctions in which carrier devices are used for carrying digital information. The SFQ circuits are sampled at the input/output for pr... | 02/13/2001 |
