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Operational amplifier and driving circuit
An operational amplifier, including an input stage circuit, an output stage circuit and a constant-gm circuit is provided. The input stage circuit provides a...
Method and circuitry for CMOS transconductor linearization
Third order distortion is reduced in a CMOS transconductor circuit that includes a first N-channel transistor and a first P-channel transistor, gates of the...
Broadband circuit for an active device
A circuit includes a de-Qing network coupled in parallel between a first and a second series-coupled reactive network. The de-Qing network is sized to lower the...
A method can include receiving audio data within a band of frequencies; amplifying individualized formant frequencies within the band of frequencies; and...
Distortion-compensation device and distortion-compensation method
Disclosed is a distortion-compensation apparatus that can reduce the storage space for storing coefficients required for distortion-compensation calculation,...
Amplifier compensating drift after sudden decrease of drain current
An RF amplifier that compensates the drift appearing after a sudden decrease of the drain current is disclosed. The RF amplifier detects the drain current by...
Low noise amplifier for multiple channels
An amplifier system has an amplifier for amplifying a plurality of input signals from a plurality of different channels, and a plurality of demodulators each...
Power amplifier and transmission apparatus
A power amplifier according to the present invention includes: an apparatus housing (10) having a hole (11) for maintenance formed therein; a transmission line...
Amplifiers with a short phase path, packaged RF devices for use therein,
and methods of manufacture thereof
An embodiment of a packaged radio frequency (RF) amplifier device includes a transistor and an inverse class-F circuit configured to harmonically terminate the...
Power amplifier and power amplification method
When frequency allocation for a plurality of frequencies is in an intra-band CA relationship, a first amplifier is operated in class B, a second amplifier is...
A limiting amplifier includes a multiplicity of cascaded amplifier stages for amplifying an input signal for the amplifier. A further amplifier stage is...
Doherty power amplifier circuit
A Doherty power amplifier circuit is provided, which includes a power divider circuit, and a power amplifier circuit connected with the power divider circuit;...
Frequency synthesizer system and method
A frequency synthesizing circuit comprising a first mixer configured to receive a first input signal at a first input thereof, a first filter configured to...
Low-power balanced crystal oscillator
A circuit includes: first and second output terminals; a reference resonator coupled between the first and second output terminals; a cross-coupled oscillation...
Dynamically reconfigurable photovoltaic system
A PV system composed of sub-arrays, each having a group of PV cells that are electrically connected to each other. A power management circuit for each sub-array...
System and method of online filtering of photovoltaic signals
A system for online filtering of photovoltaic (PV) output signals includes a programmable filter that is programmed to decompose measured PV output power into...
Guide system for solar panels
The disclosure relates to a guide system for holding and moving sunlight-absorbing devices, in particular, solar panels or concentrated photovoltaic modules,...
Clamps for solar systems
A solar power system can include a rail and a solar module disposed on the rail. A clamp assembly can couple the solar module to the rail. The clamp assembly...
Rotating electrical machine
Provided is a rotating electrical machine capable of downsizing. The rotating electrical machine includes: a stator (2) including an armature winding (9); a...
Power conversion apparatus, power conversion method, and motor system
An efficient and reliable power conversion method for converting an input voltage which is a single-phase AC voltage into output voltages forming a two-phase AC...
Motor control device and motor control method
A motor control device has a motor current detector for detecting current in windings to control the operation of a motor with a stator having three-phase...
Electric vehicle and control method therefor
A hybrid vehicle includes a battery, a boosting converter, first and second inverters, a first inverter connected to the first inverter, a second motor...
Modular motor drive configuration system and method
A motor drive system includes a power sub-assembly that comprises power electronic components and driver circuitry for controlling gate drive signals to the...
Apparatus for controlling controlled variable of rotary machine to command
In a control apparatus, an interference-reduction current calculator calculates, as an interference reduction current, a component of a current vector in a...
Vehicle and method of controlling vehicle
A vehicle includes a feeding system supplying an electric power to an external device disposed outside the vehicle, a controller controlling the operation of...
Generation of a current reference to control a brushless motor
A current reference generator to control a brushless motor in a motor control system is provided. The current reference generator includes a locate peak torque...
System and method for computing motor speed and rotor position using hall
A method and system for computing a motor speed and a rotor position using a hall sensor are provided. The method improves precision for computing the speed of...
A drive device that includes a current sensor that detects a current flowing in the wheel driving rotary electric machine; and shunt resistors that detect...
Fan motor power supply
A fan having one fan blade; a fan motor for rotating the fan blade; a motor control electrically coupled with the fan motor for controlling operational...
Motor control method and motor control apparatus
A method of controlling a motor includes a) acquiring a rotational speed parameter; b) selecting either a three-phase modulation scheme and a two-phase...
Electronic stability control system, and method for detecting a fault of
motor freewheeling FET circuit
Disclosed herein is an electronic stability control system including: a motor driver configured to include a motor switch for driving a motor unit depending on...
An objective of the present invention is to improve current detection accuracy and to reduce noise of carrier frequency. A motor apparatus and a motor drive...
Method and device for operating an electrical machine having separate
A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a...
Flow energy piezoelectric bimorph nozzle harvester
A flow energy harvesting device having a harvester pipe includes a flow inlet that receives flow from a primary pipe, a flow outlet that returns the flow into...
Racheting micromotor using bi-directional actuator
A ratcheting micromotor includes a ratchet bar defining ratchet teeth along an edge thereof, and first and second ends in opposition to one another. The first...
Power conversion device and motor driving device
The power conversion device includes a power-supply shunt resistor provided between a negative voltage side of a DC power supply and an inverter and phase...
Single phase cycloconverter with integrated line-cycle energy storage
A method and apparatus for line-cycle storage of a single-phase cycloconverter. The method includes receiving input power from an input port of the singe-phase...
Resonant single stage DC-AC converter with capacitors forming a
A new and useful circuitry for DC to AC single stage conversion are presented, with the advantages of bi-directionality, resonant power transfer, high...
When in an operation mode in which an alternating current voltage Vout is output using a positive voltage V1 of a direct current power source 1 input via a...
Solar power conversion system
A power conversion system (10) for converting power from a plurality of solar panels. The system (10) comprises a plurality of panel modules (14) each having an...
Neutral-point-clamped multilevel power conversion device
The present invention provides a power conversion device in which an on-pulse bias voltage and a neutral-point bias voltage do not interfere with each other. A...
Converter having auxiliary resonant circuit with current discriminating
A resonant power converter includes a DC power source, a positive DC conductor, a negative DC conductor, a phase conductor, and a power converting unit between...
The disclosure provides a power converter and method for controlling same, comprising a plurality of switch elements, an inductive reactor, and at least two...
Systems and methods for solar photovoltaic energy collection and
A circuit for an energy collection system is provided that includes one or more strings that are configured to couple to an electrical load. Each of the one or...
Arrangement, method and computer program product concerned with tapping of
power from a DC power line to an AC...
An arrangement for tapping power from a DC power line to an AC power line includes power transfer modules between two DC potentials, each including a first...
Transmission-line resistance compression networks and related techniques
Described embodiments provide a transmission-line resistance compression network that includes an input port, a first output port coupled to a first load and a...
Controlling parallel converter systems for wind turbines
A method of controlling a power unit having a plurality of converter modules coupled in parallel, is configured to convert DC into AC voltages or AC into DC...
Electro-mechanical kinetic energy storage device and method of operation
An electro-mechanical kinetic energy storage device includes an input port, an output port, and a tertiary port separate from and magnetically coupled to the...
Systems and methods for balancing UPS output voltages during transitions
between operating modes
A UPS includes an input that receives first power from a utility source to power a load and receives second power from the utility source. The load is separate...
Recreational vehicle transformer
A transformer with a receptacle uniquely adapted on one side to receive the plug on the end of the power cord of a U.S. built 30 A RV and a plug on the other...