Multi-amplifier envelope tracking apparatus

A wireless device comprising a multi-amplifier envelope tracking (ET) apparatus, the multi-amplifier ET apparatus comprises:

• an ET integrated circuit (ETIC) comprising:
• a first voltage circuit configured to generate a first ET voltage based on a first supply voltage and a first time-variant target voltage;
• a second voltage circuit configured to generate a second ET voltage based on a second supply voltage and a second time-variant target voltage;
• a supply voltage circuit configured to generate a plurality of supply voltages;
• and
• a control circuit coupled to the supply voltage circuit and configured to:
• dynamically select the first supply voltage from the plurality of supply voltages based on the first time-variant target voltage;
• provide the selected first supply voltage to the first voltage circuit;
• dynamically select the second supply voltage from the plurality of supply voltages based on the second time-variant target voltage;
• and
• provide the selected second supply voltage to the second voltage circuit.