Patent ID: 8331883
Filing Date: 2012-12-11
Classification: H04B

Abstract:
1. Circuitry on a portable electronic device, comprising: a radio-frequency power amplifier that amplifies radio-frequency signals at a given operating frequency that are wirelessly transmitted from the portable electronic device; adjustable power supply circuitry that supplies an adjustable power supply voltage to the radio-frequency power amplifier; and storage and processing circuitry that adjusts the adjustable power supply voltage supplied by the adjustable power supply circuitry to the radio-frequency power amplifier based at least partly on the given operating frequency, wherein the amplified radio-frequency signals are output from the radio-frequency power amplifier at an output power in a communications band subject to adjacent channel leakage ratio requirements and wherein the storage and processing circuitry is configured to store calibration data specifying adjustments that are made to the adjustable power supply voltage as a function of the given operating frequency to minimize the adjustable power supply voltage to conserve power while ensuring that the adjustable power supply voltage has a value equal to or greater than a value such that the amplified radio-frequency signals satisfy the adjacent channel leakage requirements.