Apparatus and methods for capacitive load reduction in a mobile device

Audio system having an improved efficiency and extended operation time

Apparatus for and method of a supply modulator for a power amplifier

Radio frequency circuitr having an integrated harmonic filter and a radio frequency circuit having transistors of different threshold voltages

Linearizer and radio frequency power amplifier using same

Apparatus and methods for envelope tracking systems

Power amplifier module

Amplifier with termination circuit and resonant circuit

Dynamic bias modulator with multiple output voltage converter and power amplification apparatus using the same

Supply modulators with voltage and frequency partitioning

Power amplification system with programmable load line

Power supply apparatus for power amplifier

Power amplification module

Reconfigurable load modulation amplifier

Reconfigurable load modulation amplifier

High-Speed, High-Voltage GaN-Based Operational Amplifier

Apparatus and methods for tunable power amplifiers

Dual-band signal transmission

Dual-output asynchronous power converter circuitry

Dual-mode envelope tracking power converter circuitry

Communication units and methods for power supply control

Amplifier linearization in a radio frequency system

Differential amplifier linearization in a radio frequency system

Envelope tracking power converter circuitry

Dual-mode envelope tracking power converter circuitry

Envelope tracking power converter

POWER AMPLIFICATION MODULE

Variation calibration for envelope tracking on chip

Power amplifier module

Power amplifying apparatus

Current enhanced driver for high-power solid-state radio frequency power amplifiers

Switching supply delay compensation

Apparatus and methods for power amplifiers with phase compensation

High-frequency signal processing apparatus and wireless communication apparatus

MRAM-based pre-distortion linearization and amplification circuits

Apparatus and methods for wideband envelope tracking

Transmission device and transmission method

High efficiency resonant power converters and resonant gate drivers

Arrangement and method for radio-frequency (RF) high power generation

Selective power amplifier

Power amplification module

Open loop digital PWM envelope tracking system with dynamic boosting

Power amplifier module

Apparatus and methods for power amplifier output matching

High efficiency variable voltage supply

Adjusting power amplifier stimuli based on output signals

Signal envelope processing

Power amplifier

Hysteretic current control with event dithering

Differential power amplifier for mobile cellular envelope tracking

Behavioral model and predistorter for modeling and reducing nonlinear effects in power amplifiers

Apparatus and methods for envelope shaping in power amplifier systems

Output matching network for differential power amplifier

Multistage differential power amplifier having interstage power limiter

Apparatus and method for power supply modulation

Multi-level switching regulator circuits and methods with finite state machine control

Dynamic tuning of a transformer-based radio frequency power amplifier

Power amplification device and method

Multi-band power amplification system having enhanced efficiency through elimination of band selection switch

Reduced power amplifier size through elimination of matching network

Control systems and methods for power amplifiers operating in envelope tracking mode

Multi-band device having multiple miniaturized single-band power amplifiers

Integrated CMOS transmit/receive switch in a radio frequency device

Transmit-receive isolation in a transformer-based radio frequency power amplifier

Wireless apparatus and method for controlling voltage supplied to amplifier unit

Envelope modulator

2G support for 2G and 3G/4G envelope tracking modulator

Apparatus and method for adjusting envelope signal delay in envelope-tracking power amplifier

Power saving mode fallback during concurrency scenarios

Amplification circuit

Digital predistortion system and method based on envelope tracking and radio frequency system

Audio delivery system having an improved efficiency and extended operation time between recharges or battery replacements

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

Optimization methods for amplifier with variable supply power

Push-pull driver, a transmitter, a receiver, a transceiver, an integrated circuit, a method for generating a signal at an output

Reconfigurable bias and supply drivers for radio frequency power amplifiers

Apparatus and methods for envelope tracking in a mobile device

Method and apparatus for correcting inconvenient power amplifier load characteristics in an envelope tracking based system

Linear composite transmitter utilizing composite power amplification

Envelope tracking with reduced circuit area and power consumption

Envelope tracking path delay fine tuning and calibration

Method, apparatus and system for envelope tracking

Amplifier dynamic bias adjustment for envelope tracking

Amplifier dynamic bias adjustment for envelope tracking

Amplifier having enhanced power efficiency

Envelope tracking system with internal power amplifier characterization

Linear row array integrated power combiner for RF power amplifiers

Power amplifier for amplifying radio frequency signal

Supply modulation for radio frequency power amplification

Apparatus and method for high-efficiency envelope amplifier using adjustment of switch current

Amplifier control apparatus

Amplifier topology for envelope tracking

Transfer function regulation

Apparatus and methods for capacitive load reduction of an envelope tracker

Amplification of a radio frequency signal

Reflective vector modulators

Switchable dual core power amplifier

Apparatus and methods for calibration of envelope trackers

Envelope tracking with reduced dynamic range

Variable load power amplifier supporting dual-mode envelope tracking and average power tracking performance

Digital multi-level envelope tracking for wide-bandwidth signals

Delay adjustment

Schottky enhanced bias circuit

Tunable Envelope Tracking

Amplifier with base current reuse

Wideband self-envelope tracking RF power amplifier

Adaptive ISO-gain pre-distortion for an RF power amplifier operating in envelope tracking

Apparatus and methods for power amplifiers

Systems and methods for performing power amplifier bias calibration

Circuit for reducing slope magnitude during increasing and decreasing voltage transitions

Radio frequency adaptive voltage shaping power amplifier systems and methods

Apparatus and method for dynamically biased baseband current amplifier

Adaptive linearizer

Class D amplifier circuit

Method and apparatus for supplying power to a radio frequency power amplifier

Reduced bandwidth envelope tracking

Radio-frequency high power amplifier with broadband envelope tracking by means of reversed buck converter

Apparatus and methods for wideband envelope tracking systems

Apparatus and methods for bypassing an inductor of a voltage converter

Envelope tracking with low frequency loss correction

Adaptive envelope tracking for biasing radio frequency power amplifiers

Dynamic bias current adjustment for power amplifiers

Supplying-end module for induction-type power supply system and signal analysis circuit therein

Mode linearization switch circuit

Power amplifier with termination circuit and resonant circuit

Doherty amplifier

Group delay calibration of RF envelope tracking

Resonance suppression for envelope tracking modulator

Efficiency for linear amplifier of envelope tracking modulator

Systems and methods utilizing adaptive envelope tracking

Apparatus and methods for power amplifier output matching

Envelope tracking modulator with feedback

Voltage boost for ET modulator

Apparatus and method for removing noise of power amplifier in mobile communication system

Systems and methods for delay calibration in power amplifier systems

Transmit circuit, method for adjusting a bias of a power amplifier and method for adapting the provision of a bias information

Envelope tracking RF transmitter calibration

Hybrid power module

Apparatus and methods for envelope trackers

Control of cross-over point

Power stabilization circuit and method

Power amplifier with envelope injection

Power supply stage

Amplifier circuit and operation method thereof

Device and method for controlling power amplifier

Apparatus and methods for power amplifiers

Power amplifier circuit capable of adjusting gain dynamically

Envelope tracking system for MIMO

Apparatus and a method for amplifying a transmit signal

Envelope tracking push-pull or differential power amplifier

Apparatus and a method for providing a supply control signal for a supply unit

Method and apparatus for partial envelope tracking in handheld and wireless computing devices

Bias control for stacked transistor configuration

Power amplifier and power amplification method

High-frequency drain power supply to decrease power dissipation in class-AB power amplifiers

PPA linearization

Adaptive bias circuit and power amplifier

Load current sensor for envelope tracking modulator

Power detector with overdrive detection

Multi mode bias modulator operating in envelope tracking mode or average power tracking mode and envelope tracking power amplifier using the same

Multi-mode bias modulator and envelope tracking power amplifier using the same

Power amplifier

Distortion compensation apparatus and distortion compensation method

POWER AMPLIFIER ENVELOPE TRACKING

High efficiency amplification

Pseudo-envelope following power management system

Apparatus and methods for envelope trackers

Interference suppression for switched mode power supply with error correction

Integrated power supply and modulator for radio frequency power amplifiers

Nonlinear load pre-distortion for open loop envelope tracking

Reduced power amplifier load impact for open loop envelope tracking

Apparatus and methods for calibrating envelope trackers

Signal amplifier with active power management

Power amplifier and transmitter

Power amplifier

Adaptive biasing scheme for an amplifier

Frequency selective predistortion

Reduced bandwith of signal in an envelope path for envelope tracking system

Power control

RFID positioning and tracking apparatus and methods

Apparatus and methods for phase compensation in power amplifiers

Apparatus and method for power amplification

Hybrid DC-DC converters for power amplifiers

Optimal envelope tracking reference waveform generation

Reconfigurable load modulation amplifier

ENVELOPE TRACKING POWER TRANSMITTER USING COMMON-GATE VOLTAGE MODULATION LINEARIZER

Dynamic characterisation of amplifier using multiple envelope shaping functions

Integrated power supply and modulator for radio frequency power amplifiers

Asynchronous switch mode power supply

Power supply device for high frequency power amplifying circuit and high frequency power amplifying apparatus

DETERMINATION OF ENVELOPE SHAPING AND SIGNAL PATH PREDISTORTION OF AN ET AMPLIFICATION STAGE USING DEVICE CHARACTERISATION DATA

Filter for switched mode power supply

Supply modulator

Fiber-optic node with forward data content driven power consumption

Pilot tone for amplifier bias point

Expanded range DC-DC converter

Radio communication circuit and radio communication apparatus

Peak-to-average ratio detector

Power amplifier module

Time and amplitude alignment in envelope tracking amplification stage

Amplitude modulation to phase modulation (AMPM) distortion compensation

Systems and methods utilizing adaptive envelope tracking

Dynamic amplifier supply

Apparatus and methods for wide local area network power amplifiers

Signal envelope processing

Dynamic headroom for envelope tracking

TIMING ALIGNMENT FOR MODULATED SUPPLY

Control loop for amplification stage

Power supply device for high frequency power amplification circuit and high frequency power amplification device

Integrated circuit wireless communication unit and method for providing a power supply

Envelope tracker with variable boosted supply voltage

Power supply device, method for managing power supply thereof and wireless communication terminal

Envelope tracking system for MIMO

Power module for envelope tracking

Radio frequency power amplifier circuit and method

Apparatus and methods for reducing capacitive loading of an envelope tracker

Apparatus and methods for envelope shaping in power amplifier systems

Dual instantaneous envelope tracking

Integrated circuit wireless communication unit and method for providing a power supply

Apparatus and methods for voltage converter bypass circuits

High Efficiency Amplification

Envelope tracking system with internal power amplifier characterization

Amplifier circuit

Transmit circuit, method for adjusting a bias of a power amplifier and method for adapting the provision of a bias information

High efficiency power amplifiers with advanced power solutions

Envelope tracking power amplifier system with delay calibration

Combiner for an RF power amplifier

High efficiency amplification

Bi-directional power supply signal based linear amplifier

2G support for 2G and 3G/4G envelope tracking modulator

Timing alignment for power amplifier

Apparatus and methods for envelope tracking in radio frequency systems

Apparatus and methods for reducing capacitive loading of a power amplifier supply control module

Method and apparatus for calibrating time alignment

RF power transmission, modulation, and amplification embodiments

Method and apparatus for calibrating an envelope tracking system

Control systems and methods for power amplifiers operating in envelope tracking mode

Amplifier dynamic bias adjustment for envelope tracking

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

Optimization methods for amplifier with variable supply power

Time alignment for an amplification stage

Output impedance compensation of a pseudo-envelope follower power management system

Low-cost digital predistortion apparatus and method using envelope detection feedback

Doherty power amplifier

Boost converter control for envelope tracking

Transitioning from envelope tracking to average power tracking

Control circuit and method for controlling an operation of a power amplifier

Pseudo-envelope following feedback delay compensation

Transmitter and signal processing method

CMOS based TX/RX switch

CMOS based RF antenna switch

Radio frequency front end module circuit incorporating an efficient high linearity power amplifier

Envelope tracking signal generator incorporating trim cell

Class-AB radio frequency amplifier for envelope detector

Efficient linear integrated power amplifier incorporating low and high power operating modes

Two dimensional quad integrated power combiner for RF power amplifiers

Linear row array integrated power combiner for RF power amplifiers

Apparatus and methods for capacitive load reduction

Method and apparatus for controlling or managing bandwidth of a filter circuit within a system having two integrated circuits

Envelope detector with enhanced linear range

DC-DC converter incorporating trim cell

RF power amplifier splitter

Transmitter with peak-tracking PAPR reduction and method therefor

Control of a switched mode power supply and linear power supply for an audio device

Power loop control based envelope tracking

High efficiency power amplifier architecture for off-peak traffic hours

Power amplifier

Pre-distortion in RF path in combination with shaping table in envelope path for envelope tracking amplifier

Crest factor reduction applied to shaping table to increase power amplifier efficiency of envelope tracking amplifier

Interference suppression for switched mode power supply

Output impedance compensation of a pseudo-envelope follower power management system

Bias control circuit

Adaptive biasing scheme for an amplifier

Regulated cascode current mirror scheme for transconductance amplifiers

Pseudo-envelope following power management system

High efficiency amplification

Control of cross-over point

Amplifying device

Amplifier circuit and wireless communication equipment

Dynamic characterisation of amplifier AM-PM distortion

Power amplifiers with improved power control

High-frequency amplifier, and high-frequency module and wireless transceiver using same

Power supply pre-distortion

Apparatus and methods for envelope tracking systems

Apparatus and methods for envelope tracking

Timing alignment for modulated supply

Switch mode power supply for envelope tracking

Mobile wireless communications device including sensing transistor and hysteretic comparator and related methods

Noise reduction for envelope tracking

Apparatus for compensating for distortion of transmitter array in radio communication system and method for controlling the same

Wireless resonant electric field power transfer system and method using high Q-factor coils

Switching circuit and envelope signal amplifier

Apparatus and methods for voltage converters

Apparatus and methods for power amplifiers

Method for controlling fast tracking power supply, fast tracking power supply, and system

System and Method for Calibration of Timing Mismatch for Envelope Tracking Transmit Systems

Switching circuit and envelope signal amplifier

Envelope tracking system for MIMO

RF power transmission, modulation, and amplification embodiments

Transmit circuit, method for adjusting a bias of a power amplifier and method for adapting the provision of a bias information