Abstract: The control circuit for a system provided with a power converter of multi-phase rotating electric machine, and is provided with a switch driving unit that drives the upper and lower arm switches based on the switching command to drive the rotating electric machine, an emergency power source that generates power with a power supplied from the power storage unit, an abnormality determination unit that determines whether a failure occurs in the control circuit, and an emergency control unit that performs, when the emergency determination unit determines that a failure occurs in the control circuit, a short circuit control in which either the upper arm switches or the lower arm switches are turned ON and the other arm switches are turned OFF by using the emergency power generated by the emergency power source.

Abstract: A power transmitter for wireless power transfer at an operating frequency selected from a range of about 87 kilohertz (kHz) to about 360 kHz is disclosed. The power transmitter includes a control and communications unit and an inverter circuit configured to receive input power and convert the input power to a power signal. The power transmitter further includes a coil configured to transmit the power signal to a power receiver, the coil formed of wound Litz wire and including at least one layer. The power transmitter further includes a shielding comprising a magnetic backing and a magnetic wall, the magnetic wall and magnetic backing defining a cavity, the magnetic wall including a top surface, the cavity extending, at least, from the magnetic backing to the coil, the coil positioned proximate to the top surface.

Abstract: A phase-locked loop comprises a voltage controlled oscillator. The voltage controlled oscillator comprises an inductor and a capacitor, connected in parallel, and also connected in parallel therewith, a negative resistance structure. A first terminal of the negative resistance structure is connected to respective first terminals of the inductor and the capacitor. A second terminal of the negative resistance structure is connected to respective second terminals of the inductor and the capacitor. The negative resistance structure exhibits a tunable capacitance, such that a frequency of an output of the voltage controlled oscillator can be tuned by a control input signal, and the control input signal is generated in the phase-locked loop. The negative resistance structure comprises first and second transistors.

Abstract: A mobile communication device that is configured to cancel interference within received millimeter wave band signals. The device includes a receiver circuit that is configured to receive a millimeter wave band signal, adjust gain provided to the millimeter wave band signal at a first amplifier, cancel interference in millimeter wave band signal after gain is adjusted by the first amplifier, and adjust gain provided to the millimeter wave band signal at a second amplifier after interference is cancelled.

Abstract: Disclosed is a dual-input circuit, adopting a contactor as a switching device, and being more suitable for medium and high-power applications. In addition, the adopted contactor is a single double-pole double-throw contactor with an interlocking function. In this way, the circuit is safe, simple, and easily controllable, and space utilization can be further improved. In addition, the adopted contactor further is of a magnetic attraction type, with lower power consumption for long-term work. In the present invention, either one of two inputs is set as a main input and the other is set to a backup input by default, so that the present invention can be more flexibly applied and is more applicable. To enable switching when both or only either one of the two inputs has an input voltage, the present invention further adopts a single dual-input auxiliary power supply to reduce a required space and further reduce costs.

Abstract: An oscillation apparatus includes: an oscillator including a resonator and a magnetic-field generating unit, the resonator including a loop circuit and a capacitor, the loop circuit including a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction connected in a ring shape, the magnetic-field generating unit being configured to apply a magnetic field to the loop circuit, and the oscillator being configured to perform parametric oscillation; a read-out unit for reading out an internal state of the oscillator; and a filter configured to restrict transmission of a signal in a predetermined frequency band. A circuit in which the capacitor and the loop circuit are connected in a ring shape is connected to the read-out unit through the filter.

Abstract: A VCO (voltage-controlled oscillator) includes: a resonant tank having a parallel connection of an inductor, a fixed capacitor, a variable capacitor, a first temperature compensating capacitor, and a second temperature compensating capacitor across a first node and a second node, and configured to establish an oscillation of a first oscillatory voltage at the first node and a second oscillatory voltage at the second node; and a regenerative network placed across the first node and the second node to provide energy to sustain the oscillation. The variable capacitor is controlled by a control voltage, the first temperature compensating capacitor is controlled by a first temperature tracking voltage of a positive temperature coefficient, and the second temperature compensating capacitor is controlled by a second temperature tracking voltage of a negative temperature coefficient.

Abstract: There is provided an oscillator, having an input terminal (In) and an output terminal (Out), comprising a first signal delay circuit (104a-d), having a first voltage response characteristic, configured to provide a predetermined first propagation delay; a second signal delay circuit (104e, 108, 110), having a second voltage response characteristic that is inversely correlated to said first voltage response characteristic, operatively coupled with said first signal delay circuit and configured to provide a predetermined second propagation delay, and wherein said predetermined first propagation delay and said predetermined second propagation delay are temporally matched, so as to generate an oscillating output signal (Out) of a predetermined frequency.

Abstract: A voltage controlled oscillator includes a series resonant circuit having a resonance frequency and an active voltage driving device coupled to the series resonant circuit. The active voltage driving device provides a driving voltage and has an output negative resistance in an operative voltage range at the resonance frequency. The active voltage driving device includes a cross-coupled differential pair having voltage supply terminals providing the driving voltage. The series resonant circuit is coupled between the voltage supply terminals of the cross-coupled differential pair.

Abstract: A power transmission apparatus includes a controller that controls a power transmitter that performs wireless power transmission. The controller is configured to: cause the processor to: cause the power transmitter to emit a first power transmission beam for which a first power is set; acquire feedback information on a result of reception of the first power transmission beam in a power reception apparatus; identify a power receiving capability in the power reception apparatus; and determine, with reference to the power receiving capability and the reception result, a second power which is usable in wireless power supply for the power reception apparatus and which is larger than the first power. The power receiving capability includes a maximum value of an input power range of the power reception apparatus. The wireless power transmission uses an electromagnetic wave having a frequency equal to or higher than that of a microwave.

Abstract: A power transmitter (101) comprises a driver (201) generating a drive signal for a transmitter coil to generate a power transfer signal during a power transfer time interval and an electromagnetic test signal during a foreign object detection time interval. A set of balanced detection coils (207, 209) comprise two detection coils arranged such that signals induced in the two detection coils by an electromagnetic field generated by the transmitter coil compensate each other. A foreign object detector (205) is coupled to the detection coils and performs foreign object detection during the foreign object detection time interval. The foreign object detector (205) is arranged to detect a foreign object in response to a property of a signal from the detection coils meeting a foreign object detection criterion.

Abstract: An apparatus for uninterruptible power supply (UPS) comprises a rotating electric machine having a generator winding and a plurality of motor windings. The motor windings of the plurality of motor windings are electrically insulated from the generator winding and from one another. The UPS further comprises, for each motor winding, an energy storage for electric energy and an inverter which outputs an alternating current and via which the energy storage is connected to the respective motor winding.

Abstract: An oven-controlled crystal oscillator according to one or more embodiments may include a core section having a crystal resonator, an oscillator IC and a heating IC, wherein the core section is supported by a package via an interposer, and furthermore the core section is hermetically encapsulated in the package.

Abstract: There is a need to maintain or enhance the magnetic field correction accuracy of a physics package while making the physics package more compact and portable. A triaxial magnetic field correction coil is provided inside a vacuum chamber surrounding a clock transition space having atoms disposed therein. The triaxial magnetic field correction coil is formed into a shape such that it is possible to correct, for magnetic field components of three axial directions passing through the clock transition space, a constant term, a first order spatial derivative term, a second order spatial derivative term, a third or higher order spatial derivative term, or some given combination of these terms. The triaxial magnetic field correction coil can be used in, for example, a physics package for an optical lattice clock.

Abstract: A detection coil includes a first sub coil disposed on a first PCB, the first sub coil includes a first part, and a second part that is disposed under the first part and that includes: one end connected to one end of the first part and is wound in a direction opposite to a direction the first part is wound. The detection coil includes a second sub coil disposed on a second PCB and including a third part and a fourth part disposed under the third part. The fourth part includes one end connected to one end of the third part, and is wound in a direction opposite to a direction the third part is wound. The first and second parts have polygonal shapes symmetrical to each other. The third and fourth parts have polygonal shapes symmetrical to each other. The first and second sub coils are arranged to partially overlap each other.

Abstract: A wireless power supply apparatus includes a controller, a beamforming module, and an antenna array. When direction finding information is obtained, the controller determines an electromagnetic wave transmission direction, and transmits information about the transmission direction to the beamforming module. The beamforming module aggregates energy of electromagnetic waves corresponding to a plurality of radio frequency signals to the transmission direction. The antenna array receives the direction finding information, and transmits the electromagnetic waves.

Abstract: An apparatus includes at least one first circuit configured to generate a first time-varying magnetic field for magnetic induction power transfer to a device, at least one second circuit configured to generate and/or receive a second time-varying magnetic field for magnetic induction data transfer to and/or from the device, and at least one third circuit configured to generate a third time-varying magnetic field in response to a time-varying electric current. The third time-varying magnetic field is configured to at least partially inhibit degradation of said data transfer from the first time-varying magnetic field. The apparatus further includes at least one fourth circuit configured to generate the time-varying electric current in response to a received portion of the first time-varying magnetic field.

Abstract: A ring oscillator circuit with a frequency that is sensitive to the timing of a clock-to-Q (clk2Q) propagation delay of one or more flip-flops utilized in the ring oscillator. The clock2Q is the delay between the clock signal arriving at the clock pin on the flop and the Q output reflecting the state of the input data signal to the flop. Clk2q delay measurements are made based on measurement of the ring oscillator frequency, leading to more accurate estimates of clk2Q for different types of flip-flops and flip-flop combinations, which may in turn enable improvements in circuit layouts, performance, and area.

Abstract: A method includes obtaining pairs of in-phase (I) and quadrature (Q) samples associated with a signal to be demodulated. The method also includes providing a set of the I/Q pairs to a trained AI/ML model. The set of the I/Q pairs includes an I/Q pair associated with a symbol being demodulated and at least one I/Q pair associated with at least one prior symbol that has been demodulated. In addition, the method includes using the trained AI/ML model to generate a symbol estimate for the symbol based on the set of the I/Q pairs, where the symbol estimate represents a portion of data that is encoded in the signal.

Abstract: For reading out a state of a qubit, a readout input waveform is injected into a system that comprises an information storage element for storing the state of the qubit and a readout resonator that is electromagnetically coupled to said information storage element. A readout output waveform is extracted from said system and detected. The injection of the readout input waveform takes place through an excitation port that is also used to inject excitation waveforms to the information storage element for affecting the state of the qubit. A phase of the readout input waveform is controllably shifted in the course of injecting it into the system.