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Circuits for providing class-E power amplifiers
In some embodiments, circuits for providing Class-E power amplifiers are provided, the circuits comprising: a first switch having a first side and a second...
Pseudo-envelope following feedback delay compensation
A switch mode power supply converter and a feedback delay compensation circuit are disclosed. The switch mode power supply converter has a switching voltage...
Pulse-width modulation generator
The present application relates to a pulse-width modulation generator for generating a pulse-width modulated signal, the PWM generator comprising: a PWM...
Apparatus and methods for digital predistortion
The present disclosure provides advantageously flexible and effective methods, circuits and systems for digital predistortion. In one embodiment, a...
Reduced-power dissipation for circuits handling differential
In an example, a differential amplifier is disclosed that is configured to realize low noise with decreased overall system current. The differential amplifier...
Methods and apparatus for relatively invariant input-output spectral
An electronic amplifier delivers to a load an output signal related to an input, typically with increased power. As the power output, volume, or gain of the...
Doherty power amplifier with tunable impedance load
Radio frequency (RF) amplification devices are disclosed that include Doherty amplification circuits and control circuits along with methods of operating the...
Methods and apparatuses for slew rate enhancement of amplifiers
A circuit is disclosed to enhance slew rate of an amplifier. An amplifier includes an output, a first input, and a second input in a differential pair...
Dynamic amplifier supply
A method of providing a power supply of an amplifier of a wireless transmission system comprising, determining the power at an antenna when transmitting a...
High efficiency and high linearity adaptive power amplifier for signals
with high papr
One embodiment of the present invention provides a system for controlling operations of a power amplifier in a wireless transmitter. During operation, the...
Selectable-input-impedance radio-frequency reception amplifier
A radio-frequency amplifier includes a matching network comprising a switching unit. The switching unit is operable in a first condition to provide a selected...
Operational amplifier and method of operating the operational amplifier
An operational amplifier comprises a first input pair, a second input pair, a switch and a first current mirror. The first input pair comprises a different type...
Dual stage low noise amplifier for multiband receiver
A dual stage LNA for use in multiband receivers is disclosed. In an exemplary embodiment, an apparatus includes a plurality of first stage amplifiers having a...
Coefficient estimation for digital IQ calibration
An RF reception system and method uses IF quadrature mixing, in which there is further mixing and channel filtering in the digital domain, to isolate a...
Phase shifting mixer
Performing quadrature combining and adjusting including: a plurality of mixing circuits configured to generate a plurality of frequency converted signals; at...
Solution testing equipment
There is provided solution testing equipment which can detect an output variation of a THz oscillation device using a THz wave (h.nu.) by contacting a liquid or...
A crystal oscillator, including: a voltage stabilizing unit, a transconductance unit, a feedback resistor, a crystal resonator and at least two ground...
Apparatus and method for generating an oscillator signal
An apparatus comprises a mechanical resonator-based oscillator module generating a local oscillator signal with a frequency of more than 700 MHz. Further, the...
Unit, oscillator and electronic apparatus
In a quartz crystal unit, the unit comprising a quartz crystal resonator having an overall length less than 2.1 mm, and a base portion, and first and second...
Electro-mechanical oscillator and method for generating a signal
An oscillator and method for generating a signal are provided. The oscillator comprises an electro-mechanical resonator and a reconfigurable oscillator driver....
Monolithic composite resonator devices with reduced sensitivity to
acceleration and vibration
An integrated circuit device includes a pair of serially-connected crystal resonators arranged as a first crystal resonator, which is configured to...
Solar cell measurement system and solar simulator
A measurement system having a light source, a holding device, and a measurement device. The light source includes a plurality of light emitting diodes (LEDs)...
Height adjustment bracket for roof applications
A roof mount for mounting at least one solar panel to a roof surface including a base. The roof mount includes a clamp connected to the base and a first recess...
Construction machine and method of controlling turning electric motor
A construction machine includes a turning electric motor configured to drive a turning mechanism configured to cause an upper-part turning body to turn relative...
Direct torque control motor controller with transient current limiter
An AC motor controller is provided that utilizes a direct torque controller and primary and secondary control loops. The primary control loop operates in a...
A motor apparatus includes a full-pitch winding type reluctance motor which has three phase coils formed of full-pitch windings, and a controller which controls...
Induction motor speed estimation
A method for estimating a speed of an induction motor includes applying a voltage to the induction motor and measuring a current of the induction motor. A...
Integrated fan drive system for air-cooled heat exchangers (ACHE)
An air-cooled heat exchanger (ACHE) for cooling process fluids used in an industrial process. In one embodiment, the ACHE is configured as a forced-draft ACHE....
Input vector set for position detection of PM motors
A method of determining angular position (A) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position...
Motor control device and motor control method
A motor control device includes a current command value calculating device calculating a basic current command value, a first compensation device compensating...
Normalization of motor phase measurements
A method of normalizing phase measurements for a motor using a normalizing phase measurements (NPM) algorithm that a processor implements to cause a motor...
A wind turbine and generator arrangement comprises a turbine that drives a self-excited induction generator via a shaft and mechanical gearbox. The induction...
Assembly operating in a variable regime
The invention relates to electromechanical assemblies comprising an alternator, especially of high power, typically greater than or equal to IMW, and a...
Generator management system that selectively activates generators based on
an operating parameter
Some embodiments relate to an example generator management system. The generator management system includes a first generator that is adapted to supply power to...
Method and apparatus for detecting alternator rectifier diode short fault
Methods for detecting a short fault of an alternator rectifier electronic component include sampling a field winding voltage or current signal of an alternator,...
Motor control apparatus for sensorless motor, and image forming apparatus
A motor control apparatus includes a supply unit to supply a current for excitation to a plurality of coils of a motor, a first detection unit to detect a...
Electric motor or generator
An electric motor or generator system comprising a rotor having a first set of magnet poles; a stator having a first sensor mounted on the stator and a second...
Method of controlling a brushless permanent-magnet motor
A method of controlling a brushless permanent-magnet motor. The method includes commutating a winding of the motor at times that are retarded relative to...
Method for increasing rotational speed range of ECM motor
A method for increasing rotational speed range of an ECM motor, including: 1) starting the motor and initializing parameters; 2) reading the rotor position...
Method for diagnosing a frequency converter
A method for diagnosing a frequency converter is used for a frequency converter having a positive and negative DC link voltage which is applied via bridges of...
Control device of AC motor
A control device of a three-phase AC motor includes: an inverter that drives the AC motor; a current sensor that senses a current flowing in a sensor phase of...
Motor controller with drive-signal conditioning
An embodiment of a motor controller includes a motor driver and a signal conditioner. The motor driver is operable to generate a motor-coil drive signal having...
Provided is an inverter apparatus capable of preventing occurrence of overcurrent in an AC motor and stably controlling driving of the AC motor. The inverter...
Converter unit for an asynchronous machine
A converter unit having at least one output. The at least one output is configured to be connected to a coil of an asynchronous machine. The converter unit is...
Controller for a brushless motor
A controller for a brushless motor that includes a PWM module configured in half-bridge or full-bridge mode. The PWM module outputs control signals for...
Emergency stop method for hybrid construction equipment and brake control
The present disclosure relates to an emergency stop method for hybrid construction equipment and a brake control device, and more particularly, to an emergency...
Asynchronous fluidic impulse strain-based energy harvesting system
Energy harvesting systems and devices are provided that harvest energy from external asynchronous force impulses using fluidic force transfer of the external...
Power production in a completed well using magnetostrictive materials
A device for generating electrical energy from mechanical motion includes a magnetostrictive generator configured to be mechanically coupled to a power...
System for harvesting energy from door or door hardware movement
An electrical generation system for a doorway including a door includes a lock mechanism movable between an engaged position and a disengaged position to allow...
Vibration generating apparatus and electronic apparatus including the same
A vibration generating apparatus may include a housing having an internal space, an elastic member mounted in the internal space, a piezoelectric element having...