Abstract: A power tool, in particular a hand-held power tool, for example a polishing device, a grinding device and/or a sawing device, with a tool, an electric motor for driving the tool and a control unit for controlling the electric motor. The power tool is designed for connection to a mains voltage and includes a rectifier arrangement with an intermediate circuit for providing an intermediate circuit voltage based on the mains voltage, the Intermediate circuit voltage having a plurality of successive voltage half-waves, and the control unit being configured to provide, for each voltage half-wave, a respective torque half-wave for driving the electric motor, the waveform of which torque half-wave is flattened with respect to the waveform of the voltage half-wave.

Abstract: An integrated circuit device includes a digitally controlled oscillator (DCO), two charge-sharing capacitors, two charge-sharing switches, two pre-charge switches, and two DACs. The DCO has a first inverter and a second inverter. A first charge-sharing capacitor has a first terminal coupled to an input terminal of the first inverter through a first charge-sharing switch. A first DAC has an output terminal coupled to the first terminal of the first charge-sharing capacitor through a first pre-charge switch. A second charge-sharing capacitor has a first terminal coupled to an input terminal or an output terminal of the second inverter through a second charge-sharing switch. A second DAC has an output terminal coupled to the first terminal of the second charge-sharing capacitor through a second pre-charge switch.

Abstract: A photovoltaic system and a communication method therefor. The communication method includes: each slave sends a report signal to a host, and monitors a response signal of the host; and if the at least one slave receives the response signal, the corresponding slave executes a corresponding action on the basis of the response signal. Therefore, communication between the host and each slave is achieved in a mode that each slave actively sends the report signal, the host is prevented from adopting a roll call query mode, and occupation of bus resources by the host is reduced.

Abstract: Embodiments herein relate to an apparatus and method for calibrating a notch filter which filters a power supply signal for a voltage-controlled oscillator (VCO). In one aspect, a control circuit performs a number of calibration cycles for the filter to determine a value of a calibration code for the filter which minimizes a change in a frequency of the output signal of the VCO due to a change in the voltage of the power supply signal. After each calibration cycle, the calibration code is adjusted based on whether the frequency of the output signal increase or decreases. The calibration cycles can therefore converge on an optimal calibration code which minimizes the change in frequency due to the change in voltage. This minimizes a sensitivity of the VCO to noise in the power supply signal.

Abstract: A computer-implemented method driving an actuator component that drives movement of a movable part relative to a support structure, an image sensor fixed relative to the movable part or the support structure. The image sensor carries out CDS so as to read, offset in time by a sampling period, a reference signal and a light-sensing signal, and outputs a sync signal prior to CDS. The method comprises receiving the sync signal; generating PWM control signals at a PWM frequency substantially equal to an integer multiple of the reciprocal of the sampling period; during a sensing interval, suspending generating PWM control signals to drive the actuator component; and scheduling the sensing interval to start a time delay after receiving the sync signal, such that the sensing interval overlaps with both or neither of a duration of reading the reference signal and a substantially equal duration of reading the light-sensing signal by the image sensor.

Abstract: A power transmission apparatus supplies power to a power reception apparatus without contact therebetween. The power transmission apparatus includes: a power conversion unit that outputs an alternating-current voltage of a predetermined frequency; a power transmission unit that has a power transmission coil and a capacitor that is connected to the power transmission coil; a transmission line that connects the power conversion unit and the power transmission unit; and a compensator that is disposed between the power conversion unit and the transmission line. The compensator includes: an inductive reactance element that has an inductive reactance that is greater than an inductive reactance of the transmission line; and a capacitor that reduces an inductive reactance that is a sum of an inductive reactance of the transmission line and an inductive reactance of the inductive reactance element. The inductive reactance element and the capacitor are connected.

Abstract: A device for storing electrical energy, including a plurality of switched individual cells contained inside a storage pack, a master block and a supply block supplying a DC voltage to the storage pack and the master block. In such a storage device, the storage pack is subdivided into a plurality of storage blocks, each storage block including a plurality of switched cells and a control logic sub-block for controlling each switched cell of the storage block. Each storage block furthermore also includes at least one connection sub-block for connection to a bus, each connection sub-block including an electronic switch having two positions, one position, called connected position, in which the electronic switch is open so that the storage block supplies the bus with a voltage, and one position, called short-circuit position, in which the electronic switch is closed.

Abstract: An electronic device includes: a system board; a load, located on the first side of the system board and including a power supply region, the power supply region includes load pins arranged in a plurality of rows and in a plurality of columns; and at least one column of output capacitors, located on the second side of the system board along a third direction; at least one row of the load pins is a first arrangement row, the first arrangement row includes a plurality of load pin groups arranged sequentially along the second direction, each of the load pin groups includes at least two load pins of a same polarity; and two ends of a vertical projection of each column of the output capacitors on the power supply region are located at two sides of a centerline, in the third direction, of at least one first position pin.

Abstract: A system with a low-drift on-chip (LD-RC) oscillator with lowered sensitivity to Random Telegraph Noise when generating a current (Id) for the LD-RC oscillator. A control resistor (R) is connected through an intermediary arrangement to one of a first MOS transistor (M1) or of a second MOS transistor (M2) between two terminals of a supply voltage source (Vdd). The gate of the first MOS transistor (M1) is connected to the gate of the second MOS transistor (M2), whereas the source of the first MOS transistor (M1) and the source of the second MOS transistor (M2) are connected to one terminal of the supply voltage source (Vdd), the control resistor (R) being connected to the other opposite terminal of the supply voltage source.

Abstract: In an example, a system includes an oscillator circuit on a chip. The oscillator circuit includes a charging current generator including a current mirror, an amplifier, and an on-chip resistor, where the on-chip resistor is coupled to a pin on the chip. The oscillator circuit also includes oscillator circuitry coupled to the charging current generator, where the oscillator circuitry includes a comparator, a phase generator, a first capacitor coupled to a first resistor, and a second capacitor coupled to a second resistor. The system also includes an external resistor coupled to the pin, where the external resistor is external to the chip. The system includes an external capacitor coupled to the pin, where the external capacitor is external to the chip.

Abstract: This application provides an off-board charger, a charging system, and a charging station. The off-board charger includes a power conversion circuit, a power supply port, a conversion adapter, and a controller. The conversion adapter includes a connection port and an alternating current output port. The controller controls, when the conversion adapter is connected to the power supply port, the power supply port to connect to an alternating current power grid, the power supply port to connect to the connection port, and the alternating current output port to connect to a charging port of a powered device; or controls, when the conversion adapter is disconnected from the power supply port, the power conversion circuit to connect to an alternating current power grid, and the power supply port to connect to the charging port of the powered device.

Abstract: Disclosed herein is a coil component that includes a substrate, and a planar spiral coil pattern provided on the surface of the substrate. The coil pattern has a circularity higher in its inner shape than in its outer shape.

Abstract: A photovoltaic junction box includes a first capacitor, a first conversion circuit, a second conversion circuit, a control unit, an input end, and an output end. The first capacitor is electrically connected to the input end. The first capacitor is configured to filter the alternating current part in a direct current input from an external device. The control unit is separately electrically connected to the first capacitor and the output end and configured to determine the maximum output power point of the external device. The first conversion circuit and the second conversion circuit are connected in parallel and are electrically connected to the control unit. The first conversion circuit and the second conversion circuit are configured to eliminate a ripple current.

Abstract: A system includes a first phase interpolator, a second phase interpolator, and a circuit. The circuit is configured to receive a first signal and a second signal provided by the first phase interpolator and a third signal and a fourth signal provided by the second phase interpolator. The first circuit is configured to provide at least eight phase signals, each of the eight phase signals being at a respective phase angle in response to the first signal, the second signal, the third signal and the fourth signal.

Abstract: The present invention relates to a WPT coil and an apparatus having same, and more particularly, to a WPT coil configured to have a three-dimensional shape by using a flexible substrate or the like, and an apparatus having same. A WPT coil is provided in a WPT device to transmit or receive wireless power, according to the present invention, the WPT coil comprising: a flexible substrate; and a coil structure provided on the flexible substrate, wherein the WPT coil forms a three-dimensional shape rather than a flat plate shape.

Abstract: An integrated circuit may include oscillator circuitry having a resonator formed from fin field-effect transistor (FinFET) devices. The resonator may include drive cells of alternating polarities and sense cells interposed between the drive cells. The resonator may be connected in a feedback loop within the oscillator circuitry. The oscillator circuitry may include an amplifier having an input coupled to the sense cells and an output coupled to the drive cells. The oscillator circuitry may also include a separate inductor and capacitor based oscillator, where the resonator serves as a separate output filter stage for the inductor and capacitor based oscillator.

Abstract: A resonant member of a MEMS resonator oscillates in a mechanical resonance mode that produces non-uniform regional stresses such that a first level of mechanical stress in a first region of the resonant member is higher than a second level of mechanical stress in a second region of the resonant member. A plurality of openings within a surface of the resonant member are disposed more densely within the first region than the second region and at least partly filled with a compensating material that reduces temperature dependence of the resonant frequency corresponding to the mechanical resonance mode.

Abstract: An energy storage device and an energy storage power station are provided. The energy storage device includes an energy storage cabinet and a supplementary unit. A supplementary mounting position is provided on an outer side of a cabinet body of the energy storage cabinet, and the supplementary unit is arranged outside the cabinet body and at the supplementary mounting position. The energy storage cabinet is operable separately, and the energy storage cabinet is operable in conjunction with the supplementary unit for the energy storage device to supplement electric power to an energy storage power station.

Abstract: Examples of charging systems are described which may utilize a network of resonator circuits. Control methods are described which may locate a charging location at which an electronic device is placed proximate the charging system and identify a path of resonator circuits to activate to charge the electronic device. Individual resonator circuits in the path may be activated by selecting a resonant frequency of the resonator circuit such that power may be transferred by the resonator circuit at an operating frequency.

Abstract: A wireless power transfer system includes a wireless power transfer device configured to determine a magnetic field, from among a plurality of directionally different potential magnetic fields that the wireless power transfer device is configured to generate, that has, at a receiver coil of an electronic device, a direction aligned with the receiver coil.