Patent ID: 10742170

Abstract:
Envelope tracking circuit and related power amplifier system are provided. In one aspect, an ET circuit is configured to generate a first number of ET modulated voltages based on a second number of target voltages and output the first number of ET modulated voltages via a third number of voltage outputs. In another aspect, the ET circuit can be provided in a power amplifier system including a transceiver circuit(s) and a number of power amplifier circuits. In examples discussed herein, the ET circuit may receive the second number of target voltages from the transceiver circuit(s) and provide the first number of ET modulated voltages to the power amplifier circuits for amplifying a radio frequency (RF) signal(s). By providing the ET circuit in the power amplifier system, it is possible to flexibly enable ET power management based on any number of transceiver circuits and for any number of power amplifier circuits.