Power supply reuse for high-power power amplifier

A transmitter, comprising:

• a first power amplifier (PA);
• a first power supply having an output coupled to a supply input of the first PA and configured to provide a first power to the supply input of the first PA, the first PA being configured to generate a first amplified signal for transmission with a first transmit power based on the first power;
• a second PA;
• a second power supply having an output coupled to a supply input of the second PA and configured to provide a second power to the supply input of the second PA, the second PA being configured to generate a second amplified signal for transmission with a second transmit power based on the second power;
• and
• a third PA having a supply input coupled to the first power supply and the second power supply, wherein the first power supply and the second power supply are further configured to collectively provide a third power to the supply input of the third PA, the third PA being configured to generate a third amplified signal for transmission with a third transmit power based on the third power, the third transmit power being greater than the first transmit power and the second transmit power.

A method for wireless communication, comprising:

• providing, via a first power supply, a first power to a supply input of a first amplifier;
• generating a first amplified signal via the first amplifier powered by the first power supply to transmit a signal with a first transmit power;
• providing, via a second power supply, a second power to a supply input of a second amplifier;
• generating a second amplified signal via the second amplifier powered by the second power supply to transmit a signal with a second transmit power;
• providing, collectively via the first power supply and the second power supply, a third power to a supply input of a third amplifier;
• and
• generating a third amplified signal via the third amplifier powered by the first power supply and the second power supply to transmit a signal with a third transmit power greater than the first transmit power and the second transmit power.