Envelope tracking in connection with simultaneous transmission in one or more frequency bands

摘要

Envelope tracking (ET) is enabled in connection with single-band or multi-band transmission. One example system includes two or more power amplification components associated with distinct frequency bands, with at least one including a first power amplifier (PA) configured to operate in an ET mode, and at least one including a second PA configured to operate in an average power tracking (APT) mode of operation. A first DC-to-DC converter is configured to provide a first supply voltage according to the ET mode to each first PA, and a second DC-to-DC converter is configured to provide a second supply voltage according to the APT mode to each second PA. A control component is configured to determine a present transmission mode and to select on that basis one or more PAs, wherein the control component selects at most one of the first PAs and at most one of the second PAs.

主权项

1. A system for envelope tracking (ET) in connection with single-band or multi-band transmission, comprising:
a plurality of power amplification components, wherein each power amplification component of the plurality of power amplification components is associated with a distinct frequency band, wherein each power amplification component of a first subset of the plurality of power amplification components comprises a first power amplifier (PA) configured to transmit in the distinct frequency band and configured to operate according to an ET mode of operation, wherein each power amplification component of a second subset of the plurality of power amplification components comprises a second PA configured to transmit in the distinct frequency band and configured to operate according to an average power tracking (APT) mode of operation; a first DC-to-DC converter configured to provide a first supply voltage according to the ET mode and coupled to each of the first PAs; a second DC-to-DC converter configured to provide a second supply voltage according to the APT mode and coupled to each of the second PAs; and a control component configured to determine a present transmission mode and to select, based at least in part on the present transmission mode, one or more PAs of the plurality of power amplification components.