Abstract: One example includes a current driver system. The system includes a current source configured to provide a source current to a transition node. The system also includes a Josephson latch comprising at least one Josephson junction stage. The at least one Josephson junction stage can be configured to conduct the source current from the transition node as a current-clamped bias current in a deactivated state of the Josephson latch. The Josephson latch can be configured to activate in response to the bias current and a trigger pulse to switch the at least one Josephson junction stage to a voltage state to conduct at least a portion of the source current from the transition node as an output current to a load in response to activation of the Josephson latch.

Abstract: One embodiment describes a Josephson transmission line (JTL) system. The system includes a plurality of JTL stages that are arranged in series. The system also includes a clock transformer comprising a primary inductor configured to propagate an AC clock signal and a secondary inductor arranged in a series loop with at least two of the plurality of JTL stages. The clock transformer can be configured to propagate a single flux quantum (SFQ) pulse to set a respective one of the plurality of JTL stages in response to a first phase of the AC clock signal and to reset the respective one of the plurality of JTL stages in response to a second phase of the AC clock signal that is opposite the first phase.

Abstract: One embodiment describes a reciprocal quantum logic (RQL) sense amplifier system. The system includes an input stage configured to amplify a sense current received at an input. The system also includes a detection stage configured to trigger at least one detection Josephson junction (JJ) in response to the amplified sense current and based on a clock signal to generate a single flux quantum (SFQ) pulse. The system further includes a Josephson transmission line (JTL) stage configured to propagate the SFQ pulse to an output of the RQL sense amplifier system based on at least one output JJ and to generate a negative SFQ pulse to reset the at least one detection JJ and the at least one output JJ based on the clock signal.

Abstract: One aspect of the present invention includes a reciprocal quantum logic (RQL) readout system. The system includes an input stage on which a read pulse is provided and an output stage configured to propagate an output pulse. The system also includes an RQL comparator comprising a first Josephson junction and a second Josephson junction that are coupled to a qubit. A bias current switches between a first Josephson junction in a first quantum state of the qubit and a second Josephson junction in a second quantum state of the qubit. The first Josephson junction triggers to provide the output pulse on the output stage in the first quantum state in response to the read pulse and the second Josephson junction triggers to provide no output pulse on the output stage in the second quantum state in response to the read pulse.

Abstract: One embodiment describes a JMRAM memory cell system. The system includes a phase hysteretic magnetic Josephson junction (PHMJJ) that stores one of a first binary state and a second binary state in response to a write current provided during a data write operation and to provide a superconducting phase based on the stored digital state. The system also includes a directional write element configured to provide a directional bias current during the data write operation to provide the superconducting phase of the PHMJJ in a predetermined direction corresponding to the first binary state. The system further includes at least one Josephson junction having a critical current that is based on the superconducting phase of the PHMJJ and being configured to provide an output corresponding to the stored digital state in response to a read current that is provided during a read operation.

Abstract: One embodiment describes a Josephson current source system. The system includes a flux-shuttle loop comprising a plurality of stages arranged in a series loop. Each of the plurality of stages includes at least one Josephson junction. The flux-shuttle loop can be configured, when activated, to sequentially trigger the at least one Josephson junction in each of the plurality of stages about the flux-shuttle loop in response to an inductively-coupled AC clock signal to generate a DC output current provided through an output inductor. The system also includes a flux injector system that is configured to activate the flux-shuttle loop. The flux injector system is further configured to automatically deactivate the flux-shuttle loop in response to an amplitude of the DC output current increasing to a predetermined deactivation threshold.

Abstract: A memory system includes a word-line coupled to memory cells in a row, and a bit-line coupled to memory cells in a column. Each of the memory cells includes a memory storage element including a Josephson junction configured to be in either a first state or a second state in response to an application of a word-line current to the Josephson junction. A read operation is performed on the at least one memory storage element by an application of a bit-line current to the bit-line. At least one inductive-shunt, coupled in parallel to the at least one memory storage element, is configured to, after the read operation, remove at least a substantial portion of the bit-line current provided to the at least one memory storage element without requiring removal of an entirety of the bit-line current applied to the bit-line during the read operation.

Abstract: One aspect of the present invention includes a reciprocal quantum logic (RQL) readout system. The system includes an input stage on which a read pulse is provided and an output stage configured to propagate an output pulse. The system also includes an RQL comparator comprising a first Josephson junction and a second Josephson junction that are coupled to a qubit. A bias current switches between a first Josephson junction in a first quantum state of the qubit and a second Josephson junction in a second quantum state of the qubit. The first Josephson junction triggers to provide the output pulse on the output stage in the first quantum state in response to the read pulse and the second Josephson junction triggers to provide no output pulse on the output stage in the second quantum state in response to the read pulse.

Abstract: One aspect of the present invention includes a reciprocal quantum logic (RQL) readout system. The system includes an input stage on which a read pulse is provided and an output stage configured to propagate an output pulse. The system also includes an RQL comparator comprising a first Josephson junction and a second Josephson junction that are coupled to a qubit. A bias current switches between a first Josephson junction in a first quantum state of the qubit and a second Josephson junction in a second quantum state of the qubit. The first Josephson junction triggers to provide the output pulse on the output stage in the first quantum state in response to the read pulse and the second Josephson junction triggers to provide no output pulse on the output stage in the second quantum state in response to the read pulse.

Abstract: Control of self-excited third octave vibration in a metal rolling mill can be achieved by adjusting the tension of the metal strip as it enters a stand. Self-excited third octave vibration can be detected and/or measured by one or more sensors. A high-speed tension adjustor can rapidly adjust the entry tension of the metal strip (e.g., as the metal strip enters a mill stand) to compensate for the detected self-excited third octave vibration. High-speed tension adjustors can include any combination of hydraulic or piezoelectric actuators coupled to the center roll of a bridle roll to rapidly raise or lower the roll and thus induce rapid tension adjustments in the strip. Other high-speed tension adjustors can be used.

Abstract: One aspect of the present invention includes a reciprocal quantum logic (RQL) readout system. The system includes an input stage on which a read pulse is provided and an output stage configured to propagate an output pulse. The system also includes an RQL comparator comprising a first Josephson junction and a second Josephson junction that are coupled to a qubit. A bias current switches between a first Josephson junction in a first quantum state of the qubit and a second Josephson junction in a second quantum state of the qubit. The first Josephson junction triggers to provide the output pulse on the output stage in the first quantum state in response to the read pulse and the second Josephson junction triggers to provide no output pulse on the output stage in the second quantum state in response to the read pulse.

Abstract: One aspect of the present invention includes a Josephson magnetic memory system. The system includes a superconducting electrode that conducts a read current. The system also includes a hysteretic magnetic Josephson junction (HMJJ). The HMJJ can store a binary value and convert superconducting pairs associated with the read current flowing through the HMJJ from a singlet-state to a triplet-state. The system further includes a write circuit magnetically coupled to the HMJJ and configured to write the binary value into the at HMJJ in response to at least one write current and a read circuit configured to determine the binary value stored in the HMJJ in response to application of the read current to the HMJJ.

Abstract: One aspect of the present invention includes a Josephson magnetic memory system. The system includes a superconducting electrode that conducts a read current. The system also includes a hysteretic magnetic Josephson junction (HMJJ). The HMJJ can store a binary value and convert superconducting pairs associated with the read current flowing through the HMJJ from a singlet-state to a triplet-state. The system further includes a write circuit magnetically coupled to the HMJJ and configured to write the binary value into the at HMJJ in response to at least one write current and a read circuit configured to determine the binary value stored in the HMJJ in response to application of the read current to the HMJJ.

Abstract: A second order superconductor delta-sigma analog-to-digital modulator having an input for receiving an analog signal, a first integrator coupled to the input, a second integrator cascaded with the first integrator, and a quantum comparator digitizing output from the second integrator reduces quantization noise by providing matched quantum accurate DACs in a feedback loop between output from the quantum comparator and input to the first integrator. The matched quantum accurate feedback DACs produce identically repeatable voltage pulses, may be configured for multi-bit output, may be time-interleaved to permit higher clocking rates, and may be employed in a balanced bipolar configuration to allow inductive input coupling. Bipolar feedback is balanced when gain of a first DAC exceeds gain of a matched, opposite polarity DAC by the amount of implicit feedback from the comparator into the second integrator.

Abstract: A second order superconductor delta-sigma analog-to-digital modulator having an input for receiving an analog signal, a first integrator coupled to the input, a second integrator cascaded with the first integrator, and a quantum comparator digitizing output from the second integrator reduces quantization noise by providing matched quantum accurate DACs in a feedback loop between output from the quantum comparator and input to the first integrator. The matched quantum accurate feedback DACs produce identically repeatable voltage pulses, may be configured for multi-bit output, may be time-interleaved to permit higher clocking rates, and may be employed in a balanced bipolar configuration to allow inductive input coupling. Bipolar feedback is balanced when gain of a first DAC exceeds gain of a matched, opposite polarity DAC by the amount of implicit feedback from the comparator into the second integrator.

Abstract: There is a noise reduction device for reducing noise from a vibrating strap. There is a securing member including a strip of material having a first surface including hook material and a second surface including loop material, wherein the securing member is configured to removably attach to the vibrating strap by wrapping about the strap and attaching a portion of the first surface to a portion of the second surface. There is a damping member including a plurality of strands of fibers configured to dampen vibratory motion. There is an internal coupling member configured to couple the securing member to the damping member and configured to bundle the plurality of strands of fibers.

Abstract: An apparatus for mechanically assisting the transfer of an image from an image bearing member onto a substrate. The apparatus includes a transfer assist blade that forces a substrate toward an image bearing member, a motor, a mechanical assembly for coupling the motor to the transfer assist blade such that motor operation changes the transfer assist blade force, and a controller that controls the motor operation. The controller might receive inputs from a substrate sensor, an operator control panel, and/or a service adjustment. The controller might use those inputs to control the motor operation, and thus the transfer force. Alternatively, the controller might control the transfer force as a result of the operation of the overall machine, such as by changing the transfer force during duplex printing or during the transfer of various color images.

Abstract: A fiber glass air filtration media includes a blanket of glass fibers with about 25% to 35% by weight of the glass fibers being fine glass fibers having an average diameter of less than 3.5 microns and about 65% to 75% by weight of the glass fibers being coarse glass fibers having an average diameter of more than 3.5 microns. The fine and coarse glass fibers are randomly intermingled throughout the blanket. The blanket is formed by producing the fine glass fibers on a first set of fiber generators and the coarse glass fibers on a second set of fiber generators. The fiber generators are laterally aligned across the width of and direct gaseous streams of the glass fibers at a moving collection surface where the blanket is formed. The fiber generators of the first set alternate with the fiber generators of the second set and the glass fibers produced by the two sets of fiber generators are mixed together before being deposited on the collection surface.

Abstract: This invention encompasses porous microchambers which contain cells and permit liquid to flow in and out of the chamber while retaining cells within the chamber. These porous microchambers serve as disposable devices for placing cells in a microflowchamber so that properties of the cells within the porous microchamber can be measured.