Power loop control based envelope tracking

Circuitry comprising:

• configuration-feedback circuitry configured to regulate an output power from a radio frequency power amplifier based on a difference between a target output power from the radio frequency power amplifier and a measured output power from the radio frequency power amplifier;
• and
• transceiver circuitry configured to regulate a modulated power supply voltage, which is used by the radio frequency power amplifier to provide power for amplification, based on the difference between the target output power from the radio frequency power amplifier and the measured output power from the radio frequency power amplifier, wherein:
• the transceiver circuitry is further configured to provide a modulated radio frequency input signal to the radio frequency power amplifier;
• the transceiver circuitry comprises a VCC look up table;
• the modulated power supply voltage is based on the VCC look up table;
• and
• a VCC look up table index signal is configured to provide an index signal into the VCC look up table that substantially emulates an input power of the modulated radio frequency input signal.