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Packaged RF amplifier devices and methods of manufacture thereof
An embodiment of a packaged radio frequency (RF) device includes a device substrate with a voltage reference plane, a first input lead coupled to the device...
Oscillation device and electronic apparatus
An oscillation device (electro-acoustic transducer (100)) includes an oscillation element (110) that has a vibrating member (120) and a piezoelectric element...
Impulse-assisted LC tank oscillator
An impulse generation circuit for a voltage controlled oscillator includes a zero-crossing detector configured to detect a zero-crossing time of an output...
Mounting bracket for junction box, junction box with the mounting bracket,
and solar cell module
The present invention provides a mounting bracket for a junction box utilized for solar cell, a junction box with the mounting bracket, and the solar cell...
Solar cell module
A long-side frame piece has a cylindrical portion. The cylindrical portion is formed from one side end along the direction in which the long-side frame piece...
Method of diagnosing a malfunctioning DC fan motor
A method of diagnosing DC fan motor performance is provided in which normal operation of the motor is periodically and temporarily suspended in order to verify...
Motor control device, walking assist device, and motor control method
A motor control device includes: a coil temperature detection unit which detects a coil temperature of a motor; an upper limit current determination unit which...
Single bus star connected reluctance drive and method
A system and methods for operating a switched reluctance machine includes a controller, an inverter connected to the controller and to the switched reluctance...
Method and drive apparatus for driving an electromagnetic actuator
A method of activating an electromagnetic actuator having at least one coil and a movable armature. The method includes the step in which the electromagnetic...
Method for operating an electrical machine
A method for operating an electrical machine having a stator 1 with a coil from electrical conductors, which has two coil ends 2 lying opposite each other. The...
Drive control device, electrical apparatus and drive control method
A drive control device is provided with a physical amount detection unit which detects the physical amount pertaining to the output of a motor, a rotational...
Power tool system and power supply device
A power tool system includes: a power tool including an AC motor; a portable battery pack; and a power supply device that converts a DC power supplied from the...
System and method for magnetizing a transformer in an electrical system
prior to energizing the electrical system
An electrical system includes a transformer structured to be selectively coupled to an AC source that provides a main AC voltage, the transformer having a...
Generator excitation regulation using pulse width modulation
A system may be configured to provide a regulated generator field current to a generator to acquire a regulated output voltage of the generator. In one example,...
Alternator control apparatus
An alternator control apparatus includes a first controller that controls an alternator; and a second controller that transmits an instruction signal to the...
Circuit for activating an electric motor in a hand guided work apparatus
A circuit for activating an electric motor in a work apparatus includes a main circuit having an electric motor, a rechargeable-battery pack, and an operating...
Method and device for determining the position of a brushless electric
A method for determining the position of an at least two-phase, in particular three-phase bmshless electric drive comprising at least two phase windings, each...
The outputs from a first magnetic detector and a second magnetic detector are supplied to first to fourth output circuits which are differential amplifiers,...
Apparatus and method for controlling vibration of driving motor in vehicle
The present disclosure provides an apparatus and a method for controlling a vibration of a driving motor in a vehicle by generating a vibration reduction torque...
Motor control apparatus
A motor control apparatus has an inverter circuit having a plurality of pairs of upper and lower arms provided so as to correspond to the number of phases, and...
Control apparatus for AC motor
A control apparatus for an AC motor that drives and controls the AC motor includes a damping control unit that calculates a damping manipulated variable that...
System and method for cold start of vehicle
A system and method for a cold start of a vehicle are provided. The method includes setting a target electrical angle by adding a setting angle to a previously...
Interacting complex electric fields and static electric fields to effect
Systems and methods of interacting complex electric fields and static electric fields to effect motion are disclosed. An example method includes producing an...
Piezoelectric power generator
Provided is a piezoelectric power generator that has an overall compact size and in which a plurality of piezoelectric elements having a low natural frequency...
Power conversion apparatus
A power conversion apparatus includes an inverter circuit including a switching element, a system voltage measurement unit measuring a system voltage of a power...
Abnormal H-bridge gate voltage detection
An electronic circuit includes a failure detection circuit that detects an abnormality of the gate potential of a transistor of a bridge circuit. The failure...
System and method for a DC-to-DC power converter with inverter stage
coupled to the DC input
In accordance with a preferred embodiment of the present invention, an inverter circuit includes a direct current (DC)-to-DC power converter configured to...
Inverter apparatus and inverter system
According to one embodiment, an inverter apparatus includes a power conversion unit, a wireless communication unit and a control unit. The power conversion unit...
A multilevel inverter having an efficient structure is provided, the multilevel inverter including a modularized phase-shift transformer including a plurality...
Integrated circuit device for power supply
An integrated circuit device, for a power supply that is connected to an AC power source via an input circuit having a capacitor, is able to reliably discharge...
Efficient inrush current control in power factor corrected AC-to-DC
An AC-to-DC converter involves a rectifier, an inductor, a storage capacitor, a switch, and a microcontroller. In a capacitor pre-charge operation, the...
Apparatus and method for multiple primary bridge resonant converters
A converter comprises an input stage coupled to a power source, wherein the input stage comprises a plurality of power switches, a first resonant tank coupled...
Switching power-supply device
A switching power-supply device includes: a first series circuit including a first switching element; and a second switching element, a second series circuit...
DC-DC conversion circuit and method
According to the DC-DC conversion circuit and conversion method, variation of an input voltage is reflected by detecting a voltage at a secondary winding of a...
DC-DC converter device
A DC-DC converter device and method for controlling the DC-DC converter device includes controlling gate drivers connected to the respective gate of first and...
Power controller with over power protection
A power controller with over power protection is disclosed, capable of providing a pulse-width-modulation signal to control a power switch. The power controller...
Transformer-coupled gate-drive power regulator system
A transformer-coupled gate-drive power regulator system is provided that includes a feedback stage that generates a PWM signal having a duty-cycle that is based...
Control circuit with fast dynamic response for power converters
A control circuit of a power converter is provided. It comprises a voltage detection circuit detecting a reflected signal for generating a voltage-loop signal....
Controller with power saving for power converters and method for the same
A controller with power saving for a power converter includes a delay circuit, a detection circuit, an output circuit, a counter circuit, a wake-up circuit and...
DC/DC converter within a portable computer
A DC/DC converter is disclosed. The DC/DC converter includes a first heavy-load electronic switch and a second heavy-load electronic switch connected in series...
DC-DC converter for envelope tracking
Embodiments provide a DC-DC converter (DC-DC=direct current to direct current) for envelope tracking. The DC-DC converter includes a digital control stage and a...
Adaptive pre-charge voltage converter
A voltage converting device includes a feedback module, for generating a comparing signal according to a feedback voltage and a reference voltage; a...
Charge and discharge signal circuit and DC-DC converter
A charge and discharge signal circuit includes: high side transistors connected in series; low side transistors connected in series; high side drive circuits;...
Power converter for generating both positive and negative output signals
A power converting system produces an input signal regulated with respect to an input signal. The power converting system has a first inductive element having a...
Switching power supply control circuit for current mode switching
A switching power supply control circuit has a switching element, a smoothing circuit, and a switching control circuit configured to control the switching...
High efficiency DC-DC converter with fast clock operation and load change
The DC-DC converter includes a reference voltage generating circuit that generates a reference voltage. The DC-DC converter includes a modulation clock signal...
Power supply protection system
Devices and methods provide a protection device for maintaining a steady output on a gate driver terminal despite fluctuations in a power supply, the protection...
Circuitry to control a switching regulator
In one aspect, a circuit includes a switching regulator configured to provide power to a load, a current regulator circuit coupled to the load and a response...
PWM/PFM controller for use with switched-mode power supply
A controller, for use with an SMPS DC-DC converter, includes a PWM/PFM generator and a switch driver. The PWM/PFM generator simultaneously generates...
Output current control in a boundary conduction mode buck converter
A switching power converter has an input voltage source. An output load is coupled to the input voltage source. An inductive element is coupled to the load. A...