CONTROLLED POWER BOOST FOR ENVELOPE TRACKER

摘要

An envelope-tracking (ET) power supply may include a boost control pin. The boost control pin receives a boost enable signal that activates or enables a supplemental power supply in the ET power supply. The supplemental power supply facilitates the generation of a power supply signal for a selected processing stage, e.g., a power amplifier. The supplemental power supply helps the processing stage meet the demands on it caused by the signal that the processing stage needs to handle.

主权项

1. A system comprising:
a voltage output; a signal input; a boost input; and a power converter in communication with the voltage output, the boost input, and the signal input, the power converter operable to:
receive an input voltage signal on the signal input, the input voltage signal having a voltage envelope;generate a voltage supply signal on the voltage output that approximates the voltage envelope; andrespond to a boost signal present on the boost input by enabling a supplemental power source to facilitate generation of the voltage supply signal.