Patent ID: 8165642

Claim:
Wireless communications circuitry on a portable electronic device, comprising: radio-frequency power amplifier circuitry that amplifies radio-frequency signals that are transmitted from the portable electronic device at a data transmission rate; adjustable power supply circuitry that supplies an adjustable power supply voltage to the radio-frequency power amplifier circuitry; and storage and processing circuitry that directs the adjustable power supply circuitry to supply the adjustable power supply voltage to the radio-frequency power amplifier circuitry at a level that is selected based at least partly on the data transmission rate, wherein the storage and processing circuitry comprises a cubic metric calculator that calculates a cubic metric for the radio-frequency signals that are transmitted and wherein the storage and processing circuitry directs the adjustable power supply circuitry to supply the adjustable power supply voltage based at least partly on the cubic metric.