Fast transition envelope tracking

摘要

Envelope power supply circuitry is operated in one of an off-state, a standby-state, and a transmit-state. In the standby-state, select components in envelope power converter circuitry in the envelope power supply circuitry are turned on in order to charge one or more inductive and/or capacitive elements therein to a maximum value necessary for supporting transmission of signals about a maximum output power. Accordingly, the envelope power supply circuitry is able to prepare to support transmission about any output power without knowing the output power ahead of time.

主权项

1. Envelope power converter circuitry configured to receive a supply voltage and an envelope power converter control signal and provide an envelope power supply signal to an amplifier, the envelope power converter circuitry comprising:
switching power converter circuitry configured to provide at least a portion of the envelope power supply signal based on a control output current; a control amplifier configured to receive the envelope power converter control signal, a converted supply voltage, and the portion of the envelope power supply signal provided by the switching power converter circuitry and provide the control output current; and supply voltage converter circuitry coupled to the control amplifier and configured to receive the supply voltage and provide the converted supply voltage, wherein:
in a standby-state of the envelope power converter circuitry, the control amplifier and the switching power converter circuitry are powered off, and the supply voltage converter circuitry provides the converted supply voltage according to a maximum power demand of the control amplifier; andin a transmit-state of the envelope power converter circuitry, the control amplifier and the switching power converter circuitry are powered on, and the supply voltage converter circuitry provides the converted supply voltage according to a known power demand of the control amplifier.