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Amplifier docking audio system for vehicle
An amplifier docking audio system for a vehicle includes a docking space in an audio body, a docking connector disposed on a printed circuit board of the audio...
A receiver circuit includes a first amplifier circuit to differentially amplify differential input signals by a linear operation, a second amplifier circuit...
Device and method for reducing clipping in an amplifier
Limiting clipping in an amplifier is accomplished in the feedback loop of a class D PWM amplifier that includes an integrator coupled to an input node and...
Method and apparatus for supplying power to a radio frequency power
A method and a supply modulator (SM) are provided for supplying power from a wireless transmitter to a radio frequency (RF) power amplifier. A power control...
Apparatus and methods for a capacitive digital-to-analog converter based
This application provides apparatus and methods for a capacitive digital-to-analog converter (CDAC) based power amplifier. In an example, a transmitter...
An oscillation circuit includes an electrical current generating portion configured to generate an electrical current having an oscillation frequency decreasing...
Method and apparatus for electrically accessing photovoltaic modules
An apparatus and a method for testing and/or conditioning photovoltaic modules. The apparatus includes a set of contacts for contacting electrical conductors of...
Solar cell module and photovoltaic power generation system including the
Disclosed is a solar cell module including a solar cell panel, a frame located at a peripheral portion of the solar cell panel, the frame having a fixing hole,...
Control method for vibration generator and vibration generator
A control method for a vibration generator is provided. The vibration generator includes a fixed part around which a coil is wound, a movable part having a...
Motor control device
A motor control device of the present invention includes a position detector (107), a feedforward controller, a predistorter, a feedback controller, a vibration...
System and method of rotor time constant online identification in an AC
A system and method for determining a rotor time constant of an AC induction machine is disclosed. During operation of the induction motor, a flux signal is...
Wound field synchronous machine with resonant field exciter
A brushless field exciter for wound synchronous machines that uses the resonance of the leakage inductance and a capacitor in a resonant field exciter to...
Oil sand slurry transportation system and method for variable slurry flow
Provided is a system for transporting an oil sand slurry, comprising a pump, upstream and downstream lines, a shaft connectable to the pump, a driving mechanism...
Motor driving circuit, electronic device using the same, and driving
A motor driving circuit for driving a step motor includes a logical circuit synchronized with a step pulse signal to control a bridge circuit connected to a...
Stepping motor and motorized valve using it
To provide a stepping motor which can precisely and reliably detect stopping of a rotor with respect to a stopper with a simple structure, i.e., positioning of...
Method and system for determining the position of a synchronous motor's
To establish an initial/resting position of a permanent magnet rotor, all motor stator windings are stimulated (voltage applied thereto) in sequence, the time...
Apparatus for detecting the rotor position of an electric motor and
An apparatus for detecting a position of a rotor of a DC motor with N phases having a plurality of windings. The apparatus includes circuitry to couple at least...
Two-phase duty cycle control for motor vehicle alternator combining
stepwise and progressive response for...
A method for controlling an alternator or alternator-starter of a motor vehicle, the electric machine being capable of providing an electric current, the...
Reverse rotation braking for a PM motor
A system includes a motor, an inverter bridge, a voltage detection circuit, and a controller. The motor has a stator and a rotor. The inverter bridge is...
System for controlling a synchronous electric motor
A control system included in a speed selector connected by output phases to a synchronous electric motor, the synchronous electric motor being controlled...
Fan motor braking apparatus and method of controlling the same
A fan motor braking apparatus and a method of controlling the same provide a braking protection before the fan motor revolves. The fan motor braking apparatus...
Asynchronous motor and method for operating an asynchronous motor
In a method for operating an asynchronous motor including a main winding and an auxiliary winding, a start capacitor is connected in series with the auxiliary...
Power-generating device with vibration plate that applies compressive
stress to the piezoelectric layer when...
A power-generating device includes a vibration plate, a lower electrode on the vibration plate, a piezoelectric layer made of piezoelectric material on the...
Smart grid power converter
A DC-to-AC power converter is disclosed. The power converter has a DC input to receive DC power from a photovoltaic device, an AC output configured for direct...
Method for voltage dip compensation of inverter
Disclosed is a method for voltage dip compensation of inverter, the method including reducing an output frequency of an inverter to obtain a regenerative energy...
Power supply for a charge and electricity production plant
A power supply system for a charge is provided. The power supply system includes a converter connected in input to a current source and in output to a charge,...
Controlled rectifying circuit
A rectifying circuit includes a first diode coupled between a first terminal configured to receive application of an A.C. voltage and a first terminal...
Capacitor power supply unit for small electrical loads with a high current
A capacitor power supply unit converts a mains voltage (U) into a lower operating voltage (V.sub.1) for a controller and a supply voltage (V.sub.2) for an...
Switching power supply apparatus and image forming apparatus
A switching power supply apparatus includes a voltage holding unit which holds voltage generated in an auxiliary winding of a transformer, and a voltage...
Resonant converter, control circuit and associated control method with
adaptive dead-time adjustment
A resonant converter has a switching circuit having a first switch and a second switch, a control circuit and a resonant circuit. The control circuit has a...
Control and drive circuit and method
Disclosed herein are control and drive circuits and methods for synchronous rectification switching power supply bias voltage generating circuits configured for...
Electric power conversion system
An electric power conversion system includes a primary conversion circuit, and a secondary conversion circuit magnetically coupled to the primary conversion...
Direct current electric power systems and method of operating the same
A converter system includes a power converter including a first bridge circuit including at least one first switching device. The power converter also includes...
Switching mode power supply with burst mode
A method of operating a power supply having a transformer, a transistor controlling the current through a primary side of the transformer, and a control unit...
Switching power-supply device for performing control of output voltage
A switching power-supply device performs a control of an output voltage by switching operation of a switching element and has an integrated circuit including...
Magnitude adjustment of the drive signal of a switching transistor of a
switching power converter
The drive current of the switch in a switching power converter is adjusted dynamically according to line or load conditions within a switching cycle and/or over...
Inductor current sensing in a buck converter using multiple filters
In a current mode switching power supply, current through the inductor needs to be sensed to control the peak current. The inductor current includes a DC...
Cascaded buck boost DC to DC converter and controller for smooth
transition between buck mode and boost mode
Cascaded buck boost DC to DC conversion systems, controllers and methods are presented, in which a buck converter stage is pulse width modulated in a first mode...
Power supply decoupling circuit with decoupling capacitor
A power supply decoupling circuit includes an operational amplifier, a capacitor, a source resistor, and a stabilization circuit. The operational amplifier has...
Power converter having integrated capacitor-blocked transistor cells
A converter for connecting a voltage source to a load includes a plurality of ICBT (integrated capacitor blocked transistor) cells configured as switches and...
Programmable voltage converter
A voltage converter (200) is disclosed, which comprises a controller (210) operable in: a first mode to control the voltage converter so as to convert an input...
A control device controls first and second direct-current power converter circuits so that a switching operation for at least one of a pair of first and second...
Arrangement for improving transient deviation compensation of an output
voltage of a DC-to-DC converter
When generating a voltage V.sub.out of a DC-to-DC converter for a load which is connected to the converter, it is necessary to monitor the quality of the...
Constant time controller and controlling method for a switching regulator
In one embodiment, a controlling method for a switching regulator, can include: (i) detecting an output voltage and an inductor current of the switching...
Switching power supply using in device having high peak current
A switching power supply is provided and connected between external voltage source and a device having high peak current characteristic, the switching power...
Power converter with pseudo-constant-on-time control and the control
circuit and method thereof
A control circuit for controlling a switching circuit is disclosed. The control circuit has a ramp compensation circuit, a ramp regulating circuit and a...
Ladder-based high speed switch regulator
Some embodiments include apparatuses having a switch regulator that includes a first circuit with a first comparator to compare an output of the switch...
Boost capacitor circuit and charge pump
A boost capacitor circuit is disclosed which includes a first nMOS transistor and a voltage doubler circuit including: a first pMOS transistor having a drain...
System and method for a controlled feedback charge pump
According to various embodiments, a circuit includes a charge pump and a feedback circuit. The charge pump includes a first input, a second input configured to...
Voltage charge pump with segmented boost capacitors
A voltage charge pump circuit with boost capacitor segments and boost delay chain structures are provided. The voltage charge pump circuit comprising a...