公开(公告)号：US20190097671A1

公开(公告)日：2019-03-28

申请号：US15715739

申请日：2017-09-26

Applicant: Apple Inc.

Inventor： Ronald W. Dimpflmaier ,  Rastislav Vazny ,  Lydi R. Smaini

IPC: H04B1/44 ,  H04B1/04 ,  H04W52/52 ,  H01L23/66 ,  H01Q7/00 ,  H03F3/24 ,  H04B1/3827

Abstract: The present disclosure relates to radiofrequency (RF) communications systems that may operate efficiently over a broad range of signal output levels. Electronic devices may employ amplification circuitry in the communication RF systems to provide output signal power. For example, amplification provided by external power amplifiers disposed in front-end modules may be more efficient at a higher range of output signal power, but may be inefficient at a lower range of output signal power. The disclosure relates to architectures for RF communication systems having transceivers and front-end modules that may provide power-efficient over broad ranges. Front-end modules may, for example, be managed to disable and/or enable external power amplifiers based of the output signal power. Transceivers may, for example, include internal power amplifier which may provide amplification for low output signals, and may operate as a driver to the external power amplifier of the front-end module for high output signals. Methods for managing the circuitry are also discussed.