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Methods and systems for controlling volume
A system includes a plurality of sources configured to provide a plurality of audio channels, and a control system including a processor, and a...
Method and apparatus for gain enhancement of differential amplifier
A differential amplifier circuit and method having a feed-in network coupling an input signal to an intermediate signal. An amplifier amplifies the intermediate...
System and method for dynamically mixing audio signals
A system and method for dynamically mixing audio signals may calculate a signal amplitude for each of two or more audio signals. The signal amplitude may be the...
Power amplifier circuit capable of adjusting gain dynamically
The invention provides a power amplifier circuit capable of adjusting gain dynamically. The power amplifier circuit comprises a power supply unit configured to...
Dynamic speaker management for multichannel audio systems
A multiband limiter with selective sideband linking includes first and second frequency band splitters, a first and second plurality of limiters, first and...
Amplifier with offset compensation
Aspects of this disclosure relate to compensating for a relatively large offset in a signal generated by a sensor, such as a pressure sensor and/or a resistive...
Compensated common-mode feedback for an amplifier
A common-mode feedback module is disclosed for controlling feedback in an amplifier, such as a multi-stage amplifier. The common-mode feedback module may...
Control circuit for low noise amplifier and related differential and
single-ended amplification devices
A circuit includes a first pair of transistors connected in parallel between a first node and a second node with a diode-connected transistor coupled to the...
Dual bridge amplifier configuration
An amplifier has a dual bridge design with two bridge amplifiers. A mode switch enables them to be configured in a series amplification mode. The switching of...
Class-E outphasing power amplifier with efficiency and output power
enhancement circuits and method
An outphasing amplifier includes a first class-E power amplifier (16-1) having an output coupled to a first conductor (31-1) and an input receiving a first RF...
Cableless high power RF/microwave power amplifier with multiple power
A cableless high power RF or microwave amplifier may amplifies an RF or microwave signal. The amplifier may include: an input signal divider (DIV) that has a...
Photodetector integrated circuit (IC) having a sensor integrated thereon
for sensing electromagnetic...
A photodetector integrated circuit (IC) having an electromagnetic interference (EMI) sensor integrated therein is provided for sensing EMI at the photodetector....
Power amplifier with wide band AM-AM feedback and digital pre-distortion
A system including an amplifier circuit configured to amplify an input and generate an output, a bias circuit configured to bias the amplifier circuit, and a...
A linearization circuit improves the linearity of a power amplifier based on an envelope of an input RF signal. The linearization circuit comprises an RF signal...
CDMA/OFDM linearity compliant wireless communication amplifier
A digital pre-distortion system which can provide the flexibility to model the highly non-linear distortion associated with High Efficiency RF Power Amplifiers...
Envelope tracking push-pull or differential power amplifier
There is disclosed a power amplifier arrangement comprising: first and second active devices for amplifying in-phase and anti-phase parts of an input signal; a...
There is disclosed an envelope tracking supply modulator comprising a switch mode path and a linear amplifier path, wherein the linear amplifier path includes a...
Amplifier with deterministic noise cancellation and method thereof
In one embodiment, a circuit comprising a passive input network of an input impedance configured to couple an input voltage to a first circuit node; an adaptive...
Radio frequency amplifying circuit and power amplifying module
An radio frequency amplifying circuit includes an amplifying transistor configured to amplify a radio frequency signal input to a base of the amplifying...
Device and method for controlling power amplifier
A control device provides a supply voltage to an output transistor of a power amplifier. The control device includes a detector encoder, a switch sequencer and...
Fast recovery scheme of transconductance gain for folded cascode amplifier
A folded cascode amplifier (FCA) including cascode stages coupled in a stacked cascode configuration, an input stage, and a switch circuit. The stages may...
Triple balanced, interleaved mixer
A triple-balanced mixer is disclosed. The mixer features a complementary metal oxide semiconductor (CMOS) mmW (millimeter wave) integrated circuit and adds an...
Low complexity frequency selective IQ mismatch digital RX balancer and TX
inverse balancer for non-ideal RF...
A system for reducing a mismatch between an in-phase (I) signal and a quadrature phase (Q) signal is disclosed. The system includes a phase compensation block...
Regenerative frequency multiplier
A technology is provided for generating an output frequency. An input signal with a defined frequency may be received. The input signal may be split so that a...
High-precision GHZ clock generation using spin states in diamond
Techniques for obtaining a frequency standard using the crystal field splitting frequency of nitrogen vacancy center in diamond are disclosed. In certain...
Crystal oscillator with reduced acceleration sensitivity
A crystal oscillator having a plurality of quartz crystals that are manufactured so that the directional orientation of the acceleration sensitivity vector is...
Cross-coupled oscillator, integrated circuit and electronic device
A cross-coupled oscillator arrangement has a first resistance-capacitance oscillator core including at least two inverting stages; and a second ...
60 GHz frequency generator incorporating third harmonic boost and
A novel and useful 60 GHz frequency generator based on a third harmonic extraction technique which improves system level efficiency and performance. The...
Transformer feedback voltage controlled oscillator (VCO)
A transformer is described. The transformer includes a primary coil and a first secondary coil. A first coupling occurs between the first secondary coil and the...
RC oscillator based on delay-free comparator
Cancelling a delay in a comparator of an RC oscillator configured to generate a clock pulse, including: selectively coupling a plurality of current sources to a...
Electric power steering apparatus
Motor control command output means outputs, as a motor control command, a second command value, which is calculated by second command value calculating means on...
Reduction technique for permanent magnet motor high frequency loss
A system including a motor loss reducing controller system utilizing input band-shifting, an integral control architecture and inverse band-shifting is...
Compressed air energy storage system utilizing two-phase flow to
facilitate heat exchange
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or...
Methods and systems for electrical DC generation
An electrical DC generation system is disclosed. According to one aspect, a system for electrical DC generation system includes an electrical machine, having a...
Sensorless DC fan speed controller
A method of maintaining a calibrated DC fan motor is provided in which normal operation of the motor is periodically and temporarily suspended in order to...
Motor drive apparatus and discharge control method of the same
An object is to perform discharge of a capacitor using a motor without rotating the motor even when connected to a position sensorless motor. The motor drive...
An air conditioner includes: an outdoor fan provided in an outdoor unit; a permanent magnet synchronous motor that drives the outdoor fan; an inverter that uses...
System and method for inducing rotation of a rotor in a sensorless motor
System and method for initiating rotation of a rotor in a motor. The motor may include the rotor and a plurality of pairs of electromagnets. A rotation period...
Control circuit for a DC motor
A control circuit for a DC motor, has: a first and second input ports for connection to a DC source; a H-bridge driving circuit, having first and second...
Switching controller for electric motors and related method of controlling
A switching controller of a poly-phase electric motor may generate, in a fully digital manner, a replica of the phase current and/or of the phase (star) voltage...
Regenerative rectifier for a motor control drive
A system, and associated method, for controlling a motor drive coupled to an AC power source in a condition wherein the motor drive is generating a regenerative...
A system and method for controlling a brake coil in a motor having a control processor and a controller in communication with the control processor, the...
Transport vehicle, charging system and electricity-generating tire
A transport vehicle includes a driving unit, a wheel and a charging system. The charging system includes an electricity-generating tire and a converting unit....
An ultrasonic motor is described. The ultrasonic motor includes a plurality of plate-shaped piezoelectric ultrasonic actuators. Each of the ultrasonic actuators...
Rotational type of MEMS electrostatic actuator
A cantilever type of electrostatic vertical combdrive actuators may generate larger actuator displacement (typically over 70 um) with a relatively small and...
Large scale energy storage system enabling balanced control of inverters
There is disclosed a large scale energy storage system enabling balanced control of inverters, the large scale energy storage system including an inverter...
Multi-level inverter and power supply system
A multi-level inverter includes two N-level inverter units with pulse width modulation waves staggered by a phase of 180 degrees, and N is an integer greater...
An inverter unit includes a first circuit board and a second circuit board arranged at a predetermined space so as to face each other. Each of the first circuit...
Power conversion control device, power conversion control method, electric
motor, and vehicle driving system
A power conversion control device includes a modulation-wave generating unit generating a modulation wave based on output voltage phase angle command and...
Inverter device with upper and lower arm elements
An inverter device includes a substrate, upper arm elements, lower arm elements, positive and negative input electrodes, and an output electrode. The upper arm...