Radio-frequency power amplifier circuitry with power supply voltage optimization capabilities

A method of operating a wireless device that is allocated a number of Long-Term-Evolution (LTE) resource blocks within a LTE frequency band having multiple LTE resource blocks, the method comprising:

• with radio-frequency transceiver circuitry, transmitting radio-frequency signals in the LTE resource blocks within the LTE frequency band;
• with a radio-frequency power amplifier, amplifying radio-frequency signals in at least some of the LTE resource blocks;
• with adjustable power supply circuitry, supplying an adjustable power supply voltage to the radio-frequency power amplifier;
• with storage and processing circuitry, adjusting the adjustable power supply voltage supplied by the adjustable power supply circuitry to the radio-frequency power amplifier based at least partly on how many of the LTE resource blocks in the LTE frequency band are allocated to the wireless device;
• and
• with the storage and processing circuitry, controlling the adjustable power supply circuitry to increase the adjustable power supply voltage when one or more of the allocated LTE resource blocks are located at edges of the LTE frequency band and to decrease the adjustable power supply voltage when the allocated LTE resource blocks are located near a center of the LTE frequency band.

Wireless communications circuitry configured to communicate with a base station in resource blocks within a frequency band containing multiple resource blocks, wherein the frequency band is subject to adjacent band emissions requirements associated with limits on interference between the frequency band and adjacent frequency bands, and wherein the resource blocks are subject to in-band emissions requirements associated with limits on interference between resource blocks within the frequency band and wherein the frequency band has a center frequency and edge frequencies, the wireless communications circuitry comprising:

• an antenna;
• a radio-frequency power amplifier that amplifies radio-frequency signals that are transmitted from the electronic device to the base station using a plurality of resource blocks;
• adjustable power supply circuitry that supplies an adjustable power supply voltage to the power amplifier circuitry;
• and
• storage and processing circuitry configured to adjust the adjustable power supply voltage supplied by the adjustable power supply circuitry to the radio-frequency power amplifier based on where the plurality of resource blocks are located within the frequency band to minimize power consumption while satisfying the adjacent band emissions requirements and the in-band emissions requirements by:
• increasing the adjustable power supply voltage when the plurality of resource blocks are near the edge frequencies of the frequency band;
• and
• reducing the adjustable power supply voltage when the plurality of resource blocks are near the center frequency of the frequency band.