Abstract: A method for performing supplementary charging on a low-voltage battery based on redundancy power conversion, includes: determining whether supplementary charging is required for a first low-voltage battery or a second low-voltage battery in a parked state; determining whether supplementary charging mode entering using a voltage of a high-voltage battery is possible when it is determined that the supplementary charging is required; and converting and supplying a charging voltage of another low-voltage battery to a low-voltage battery that requires supplementary charging among the first low-voltage battery or the second low-voltage battery when a condition that does not allow the supplementary charging mode entering is determined.

Abstract: A microwave synchronisation system comprising an oscillator configured to provide a microwave signal, and an RF cavity configured to resonantly enhance the microwave signal to form a resonantly enhanced electromagnetic field, an electro-optic modulator connected to the RF cavity and configured to receive a microwave signal from the RF cavity, and an optical interferometer which includes the electro-optic modulator and is configured to provide an output indicative of a phase difference between a pulsed laser beam and the microwave signal received from the RF cavity, wherein the output from the interferometer is connected to an input of the oscillator to provide feedback through which electromagnetic fields in the RF cavity can be synchronised with the pulsed laser beam.

Abstract: The present disclosure relates to an oscillator, such as a Digitally Controlled Oscillator (DCO), having first capacitor banks coupled to a first path and a second path, the first path connecting a first node to a first output node, and the second path connecting a second node to a second output node, and second capacitor banks coupled to a third path and a fourth path, the third path being connected to the first node, the fourth path being connected to the second node, the first and second paths being separate from the third and fourth paths, and the second capacitor banks including at least one modulation capacitor bank.

Abstract: A voltage controller detects a voltage spike in an electrical signal received from an electrical power source. The voltage controller is implemented using a single-loop control system in a stationary reference frame. The electrical signal includes voltage harmonics caused by a non-linear or unbalanced load. The voltage controller includes a phase-compensated harmonic regulator that regulates the voltage harmonics present in the electrical signal and receives a feedback voltage of the single-loop control system. The feedback voltage is a delayed version of an instantaneous voltage of the electrical signal. The instantaneous voltage is sub-transiently stabilized into a steady-state voltage based on the feedback voltage. Sub-transiently stabilizing the instantaneous voltage is performed within a single cycle after the voltage spike is detected. The steady-state voltage has a total harmonic distortion less than a threshold total harmonic distortion and the steady-state voltage has a balanced sinusoidal waveform.

Abstract: Disclosed solutions relate to electrical inverters. An inverter may further include may include a power module including phase switches, a first negative DC power tab, and a second negative DC power tab. The first negative DC power tab and the second negative DC power tab are connected to one or more of the phase switches. The inverter may further include a positive DC power tab positioned between the first negative DC power tab and the second negative DC power tab and connected to the phase switches. The inverter may further include one or more phase AC power tabs to receive AC power from the phase switches.

Abstract: An antenna device used in a contactless power transmission system includes a first resonant antenna having a first impedance and a second resonant antenna having a second impedance different from the first impedance.

Abstract: A battery module for an electrically-driven aircraft is disclosed. The battery module can house multiple battery cells and prevent a battery cell fire or explosion from one battery cell from damaging neighboring battery cells. The battery module includes: a housing; a plurality of cell tubes housing a plurality of battery cells, each cell tube having an elongated surface and being positioned in the housing spaced apart from each other; a heat absorbing member comprising a heat absorbing material, wherein the heat absorbing member is arranged between at least two neighboring cell tubes; and the heat absorbing material being configured to undergo a phase transition from an initial state of matter into a final state of matter when at least one of the plurality of cell tubes exceeds a predetermined temperature in case of explosion or fire of at least one of the plurality of battery cells.

Abstract: A method for managing the use of an on-board motor vehicle battery charger. The vehicle including a supply battery, the on-board charger being connected, on the one hand, to the battery and being intended to be connected, on the other hand, to an electrical power supply network that is external to the vehicle and is able to provide a three-phase voltage. Each network phase is characterized by a maximum overall usage power. The on-board charger includes a plurality of conversion modules, each conversion module includes a plurality of elementary power conversion units that are independent of one another. Each elementary unit being characterized by a maximum usage power threshold. Each conversion module being intended to be connected to an external power supply network phase.

Abstract: Configuring a fault-sensing ring oscillator circuit is disclosed. In a particular embodiment, a fault-sensing ring oscillator circuit includes a plurality of ring oscillators; an enable circuit configured to enable and disable the plurality of ring oscillators; an OR circuit including a plurality of inputs, wherein each input is coupled to a respective ring oscillator of the plurality of ring oscillators; and a first fault detection latch including a SET input coupled to a first output of the OR circuit and a RESET input coupled to the enable circuit, wherein the first fault detection latch indicates a stuck at fault condition when the plurality of ring oscillators are disabled by the enable circuit and at least one of the plurality of ring oscillators is active.

Abstract: A crystal oscillator includes a two stage amplifier and a crystal. The two stage amplifier includes a transconductance amplifier stage electrically connected to a class AB output amplifier stage with open loop drive level control. The two stage amplifier provides a negative resistance. The crystal is electrically connected between an input of the two stage amplifier and an output of the two stage amplifier.

Abstract: A power supply controller controls operation of a power supply apparatus that generates an output voltage from an input voltage. The power supply controller includes a temperature determination circuit configured to determine to which of a plurality of temperature ranges a temperature of the power supply controller belongs, a measurement circuit configured to measure, for each of the plurality of temperature ranges, a period for which the temperature of the power supply controller belongs to the temperature range, and a nonvolatile memory configured to store a measurement result of the measurement circuit.

Abstract: In a method for operating a vehicle electrical system for a motor vehicle, a vehicle battery of the vehicle electrical system that has at least two sub-batteries provides electrical energy from more than one of the at least two sub-batteries at a conventional supply terminal of the vehicle electrical system, the conventional supply terminal being electrically coupled to the vehicle battery. At least a first and a second safety supply terminal of the vehicle electrical system are supplied with electrical energy by a coupling device of the vehicle electrical system, the coupling device being connected to the vehicle battery, and the coupling device electrically coupling the at least a first and second safety supply terminal each to exactly one of the at least two sub-batteries in accordance with a coupling state of the coupling device.

Abstract: An integrated circuit device includes a clock input terminal disposed along a first side, to which a reference clock signal is input, a first power supply voltage input terminal disposed along the first side, to which a first power supply voltage is input, a clock output terminal disposed along the second side, from which an output clock signal having a frequency different from that of the reference clock signal is output, a second power supply voltage input terminal disposed along the second side, to which a second power supply voltage is input, a first ground terminal disposed between the clock input terminal and the first power supply voltage input terminal along the first side, and a second ground terminal disposed between the clock output terminal and the second power supply voltage input terminal along the second side.

Abstract: An oscillator in which crosstalk can be reduced is provided. An oscillator includes a ground plane made of a superconductor, a conductive member spaced apart from and surrounded by the ground plane, a SQUID of which one end is connected to the conductive member and the other end is connected to the ground plane, a first connection circuit made of a superconductor, connecting parts of the ground plane located on both sides of a vicinity of a connection part between the conductive member and the SQUID to each other, and a superconducting loop circuit surrounding the SQUID and using the ground plane and the first connection circuit.

Abstract: A system includes a mode-locked laser (MLL) configured to receive a first radio frequency (RF) reference signal, and based on the first RF reference signal, generate an optical frequency comb (OFC). The system further includes a wavelength conversion medium configured to receive the OFC, and based on the OFC, generate at least one photonic reference signal. The system further includes a transfer oscillator (TO) circuit configured to receive the OFC and the at least one photonic reference signal, and generate the first RF reference signal based on the OFC and the at least one photonic reference signal.

Abstract: Disclosed are a quantum-entangled photon-pair light source using a chip-scale atomic ensemble and implementation method thereof. The quantum-entangled photon-pair light source may include an atomic vapor cell configured to generate cesium (Cs) vapor to fill a photon-pair chamber and a processor configured to cause a coupling laser and a pump laser to travel based on the photon-pair chamber and generate a photon pair of a signal and an idler from the atomic vapor cell.

Abstract: Semiconductor devices for synchronizing networks are described. A semiconductor device can include a phase lock loop of a timing circuit. The phase lock loop includes a voltage-controlled oscillator, a sub-sampling phase lock loop circuit and a frequency correction loop circuit. The frequency correction loop circuit is configured to activate a charge pump to inject a charge into the voltage-controlled oscillator based on a phase difference between a reference signal and a feedback signal being greater in magnitude than a deadzone delay parameter plus a hysteresis delay parameter and de-activate the charge pump based on the magnitude of the phase difference between the reference signal and the feedback signal falling below the deadzone delay parameter.

Abstract: A method for generating a clock signal using a digital phase-locked loop includes updating a gain of a variable gain digital filter of the digital phase-locked loop using an estimate error of a current estimate of a phase and a frequency of an input clock signal and a measurement error of a measurement of the phase and the frequency of the input clock signal. The gain may include a proportional gain component and an integral gain component. The method may include calculating the current estimate of the phase and the frequency of the input clock signal based on a previous estimate of the phase and the frequency of the input clock signal, the measurement of the phase and the frequency of the input clock signal, and the gain of the variable gain digital filter. The gain may be updated every cycle of the input clock signal.

Abstract: A power management integrated circuit and a method of operating the power management integrated circuit are disclosed. The power management integrated includes an upper regulator circuit that receives a system voltage as an input and outputs a first output voltage; a lower regulator circuit having the first output voltage as an input; and a Kelvin switch circuit connected between the upper regulator circuit and the lower regulator circuit. The Kelvin switch circuit includes a plurality of switches that connect any one of a plurality of upper regulators included in the upper regulator circuit to any one of a plurality of lower regulators included in the lower regulator circuit.

Abstract: An electromagnetic modulation device may include a receiver configured to receive electromagnetic signals, a digital-to-analog converter configured to continuously generate a modulation signal, a mixer coupled to the receiver and the digital-to-analog converter and configured to encode the electromagnetic signals received by the receiver with the modulation signal generated by the digital-to-analog converter upon receipt of the electromagnetic signals by the receiver, and a transmitter coupled to the mixer and configured to transmit the encoded electromagnetic signals generated by the mixer.