Configuration-feedback circuitry and transceiver circuitry are disclosed. The configuration-
feedback circuitry regulates an output power from a radio frequency power amplifier based …

Envelope trackers providing compensation for power ampli fier output load variation are
provided herein. In certain configurations, a radio frequency (RF) system includes a power …

An envelope tracking system for controlling a power amplifier supply voltage includes
envelope circuitry and a feed forward digital to analog converter (DAC) circuitry. The …

Power supply circuitry, which includes a parallel amplifier and a parallel amplifier power
supply, is disclosed. The power supply circuitry operates in either an average power tracking …

(57) ABSTRACT A radio frequency (RF) system includes an RF power ampli fier (PA), which
uses an envelope tracking power supply voltage to provide an RF transmit signal, which has …

Apparatus and methods for envelope tracking systems with automatic mode selection are
provided herein. In certain configurations, a power amplifier system includes a power …

Envelope tracking systems with modeling for power amplifier supply voltage filtering are
provided herein. In certain embodiments, an envelope tracking system includes a supply …

Methods of calibrating a power amplifier system to compensate for envelope amplitude
misalignment are provided. In certain configurations, a method of calibrating a power …

Apparatus and methods for envelope tracking are disclosed. In one embodiment, a power
amplifier system including a power amplifier and an envelope tracker is provided. The power …

Envelope power supply circuitry includes power converter circuitry and envelope tracking
circuitry. The power converter circuitry is configured to receive an envelope power converter …