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 method for controlling a battery-powered power supply. The method includes generating a first output from a first power supply within the battery-powered power supply. The first output is coupled to an output bus. The method further includes monitoring a voltage of the output bus, and determining, using a controller of the battery-powered power supply, whether the voltage of the output bus is less than a first predetermined level. The method further includes deactivating the first power supply in response to determining that the voltage of the output bus is below the first predetermined level, and generating a second output from a second power supply within the battery-powered power supply. The second output is configured to be coupled to the output bus. The second power supply has a higher output rating than the first power supply.

Abstract: A wireless transmission module for transmitting energy or signals includes a first magnetically conductive element, a first coil assembly and a first adhesive element. The first coil assembly and the first magnetically conductive element are arranged along a main axis. The first adhesive element is configured to be adhered to the first coil assembly and the first magnetic conductive element. The first adhesive element is disposed between the first coil assembly and the first magnetically conductive element.

Abstract: A power source combination circuit has a combination circuit and a controller. The combination circuit includes a first power source, a first field-effect transistor, a second power source, and a second field-effect transistor. The controller is configured to control the combination circuit to supply power to a load circuit, obtain a first input voltage, a second input voltage, and a third input voltage, and diagnose, based on the obtained voltages, whether the combination circuit is in a normal state or an abnormal state. The first input voltage is an input side voltage of the first field-effect transistor, the second input voltage is an input side voltage of the second field-effect transistor, and the third input voltage is a voltage at a power source input end of the load circuit.

Abstract: The invention relates to a mobile electric energy supply device, comprising at least one energy supply connector for drawing energy from the energy supply device, a ground grounding device adapted to cooperate with a ground of the installation site of the energy supply device to provide grounding for the energy supply device, and a touch safety monitoring device adapted to monitor at least one touch point disposed on or electrically connected to the energy supply device for touch safety.

Abstract: A system for reference clock frequency correction is described. The system comprises a compensation module configured to (i) receive, as input, an oscillator signal and one or more control signals, (ii) generate a compensation signal based on the oscillator signal and the one or more control signals, wherein the generated compensation signal is a discretized sinusoidal signal having a controllable frequency, and (iii) output the generated compensation signal. The system further comprises a mixer block configured to (i) receive, as input, the generated compensation signal and the oscillator signal, and (ii) generate an output clock signal by mixing the generated compensation signal with the oscillator signal. A soft-switching method to reduce the effect of quantization noise is further described.

Abstract: The present disclosure relates to an energy harvesting system for converting a low-voltage input of an energy harvesting source into a Direct Current (DC) output voltage. The energy harvesting source is one of an energy harvesting source providing an Alternating Current (AC) output such as a piezoelectric energy harvesting source, and an energy harvesting source providing a DC output such as a photovoltaic energy harvesting source.

Abstract: An integrated circuit is built with enhancement mode Gallium Nitride (GaN) components. The integrated circuit comprises a comparator circuit which compares an input voltage with a reference voltage to provide a controllable constant current source, the comparator having a drive transistor having a positive threshold voltage, the drive transistor being switched on and off based on a comparison result of the comparator. The circuit may drive ring oscillators and may provide pulse width modulation with variable duty cycle at constant frequency.

Abstract: The present disclosure provide techniques for communicating energy request reports and energy reports. A method includes sending an energy request indication in an energy request occasion, the energy request indication indicating a request for a user equipment (UE) to send an energy request report to the network node. The method further includes sending the energy request report, the energy request report indicating a request for a network node to transmit power to the UE or a request for time for the UE to harvest energy. The method further includes sending an energy report indication in an energy report occasion, the energy report indication indicating a request for the UE to send an energy report to the network node. The method further includes sending the energy report, the energy report indicating to the network node at least one communication capability of the UE based on an energy level of the UE.

Abstract: An electronic circuit unit includes a trigger circuit and a circuit module. The trigger circuit includes a semiconductor switching element configured to output a switching pulse signal in response to an external trigger signal, a load resistor for the semiconductor switching element, a one-shot pulse circuit configured to convert the switching pulse signal into a one-shot pulse with a predetermined pulse width, and a forcible-reset circuit connected to an input side of the semiconductor switching element. The one-shot pulse circuit includes a coupling capacitor connected to an input side of the semiconductor switching element and a charging resistor for the coupling capacitor. The pulse width of the one-shot pulse is determined by a time constant of the coupling capacitor and the charging resistor. The forcible-reset circuit is configured to temporarily input an on-voltage to the semiconductor switching element so as to forcibly switch the circuit module to the operating mode.

Abstract: Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to generate or couple to a magnetic field to transfer or receive power and a plurality of tuning capacitors electrically coupled to the wireless-power transfer coil. The apparatus also includes a power converter circuit electrically coupled to the wireless-power transfer circuit. Additionally, the apparatus includes a signal generation circuit different from the power converter circuit and electrically coupled to one or more nodes between capacitors of the plurality of tuning capacitors. The signal generation circuit is configured to generate and inject a signal into the wireless-power transfer circuit at the nodes between the capacitors. The signal generation circuit includes a rejection filter tuned to an operating frequency of the wireless-power transfer coil.

Abstract: A classification circuit generates first information for classifying an operating state of a power semiconductor element into one of a plurality of predetermined operating regions. A selector circuit generates second information for selecting a plurality of modes with different switching speeds, based on a user input. A characteristic control circuit stores a drive adjustment signal in advance for each of combinations of the operating regions and the modes and outputs the drive adjustment signal in a combination of one operating region and one mode that is selected in accordance with the first information and the second information. A gate drive circuit charges/discharges a gate at a charge rate and a discharge rate variably set in accordance with the drive adjustment signal from the characteristic control circuit, at the time of on/off of the power semiconductor element.

Abstract: An oscillator comprising, a cavity wherein the cavity comprises an electrical conductor. The oscillator comprising an electrical insulator disposed on a surface of the cavity; and a heterostructure disposed on a surface of the electrical insulator and having a first end and a second end, the heterostructure comprising one or more spin current source layers and one or more magnetic material layers. In response to an electrical current passed through the spin current source, an oscillation occurs in a plurality of magnetic domains of the magnetic material, wherein the oscillations have substantially the same phase.

Abstract: A method for protecting a system including a driver integrated circuit includes receiving a driver input signal. The method includes driving an output signal externally to the driver integrated circuit. The output signal is driven based on the driver input signal and an indication of a delay between receipt of an edge of the driver input signal and arrival of a corresponding edge of the output signal at an output node coupled to a terminal of the driver integrated circuit.

Abstract: Systems and methods are disclosed for wide frequency range voltage controlled oscillators. For example, an apparatus includes a Voltage Controlled Oscillator (VCO) including a delay cell which includes first and second current sources provided in parallel with one another. The first current source is controlled by a voltage control input connected to a voltage control terminal and the second current source is controlled by a bias voltage input connected to a bias voltage terminal. The first current source provides an alternate current path in the delay cell when the second current source is off. The delay cell is operable to receive an input and produce an output using the alternate current path.

Abstract: A time delay circuit comprising a plurality of differential delay cells each having a respective time delay and being arranged in series. Each delay cell comprises first and second inverter sub-cells, each comprising a respective PMOS transistor and an NMOS transistor arranged in series such that their respective drain terminals are connected at a drain node. Each of the transistors has a back-gate terminal and is arranged such that a respective voltage applied to said back-gate terminal linearly controls its respective threshold voltage. The back-gate terminal of the PMOS transistor in each inverter sub-cell is connected to the drain node of the other sub-cell and/or the back-gate terminal of the NMOS transistor in each inverter sub-cell is connected to the drain node of the other sub-cell. A control signal varies the time delay of the delay cell by adjusting a voltage supplied to a back-gate terminal of a transistor.

Abstract: An electronic circuit for uniform distribution of a current includes: a first MOSFET and a second MOSFET, wherein the first MOSFET and the second MOSFET are connected in parallel in order to distribute a current applied to an input terminal, the current flowing towards an output terminal of the electronic circuit, wherein the input terminal is respectively connected to a drain terminal of the first MOSFET and to a drain terminal of the second MOSFET; and a terminal for a control voltage, wherein the control voltage is applied to a gate terminal of the first MOSFET and to a gate terminal of the second MOSFET. The first MOSFET comprises a first resistor at the gate terminal of the first MOSFET, and the second MOSFET comprises a second resistor at the gate terminal of the second MOSFET.

Abstract: In one aspect, a fuel cell power system is provided. The fuel cell power system includes a ring bus, a plurality of bidirectional uninterruptible power supplies (UPSs), a plurality of direct current (DC) fuel cell modules, and a plurality of bidirectional direct current to alternating current (DC-AC) power converters. Each of the plurality of UPSs is electrically coupled to at least one battery, an AC utility feed, a load, and via a choke, the ring bus. Each of the plurality of DC fuel cell modules includes one or more fuel cells coupled to a hydrogen storage. Each of the plurality of bidirectional DC-AC power converters is electrically coupled to a corresponding one of the plurality of DC fuel cell modules and a corresponding one of the plurality of bidirectional UPSs at the AC utility feed.

Abstract: A switch circuit, a mixer, and an electronic device, where the switch circuit includes a first metal oxide semiconductor (MOS) transistor, a second MOS transistor, a third MOS transistor, and a fourth MOS transistor, both a gate of the first MOS transistor and a gate of the fourth MOS transistor are connected to a first port, and both a gate of the second MOS transistor and a gate of the third MOS transistor are connected to a second port; and a lead between the gate of the first MOS transistor and the first port, a lead between the gate of the second MOS transistor and the second port, a lead between the gate of the third MOS transistor and the second port, and a lead between the gate of the fourth MOS transistor and the first port all have an equal length. In this way, linearity is relatively high.

Abstract: A driving circuit comprises a first capacitor. During a sampling operation, the first capacitor is coupled between a first and a second input terminals. During a transferring operation, an end of the first capacitor receives a voltage and another end of the first capacitor is coupled to a load. The driving circuit produces a first driving signal to drive the load, the first driving signal comprises a plurality of first portions with a first polarity and a plurality of second portions with a second polarity opposite to the first polarity. The plurality of first portions and the plurality of second portions form a generalized DSB-SC modulated component of the first driving signal, which is modulated according to an input signal between the first input terminal and the second input terminal.