公开(公告)号：US12301274B2

公开(公告)日：2025-05-13

申请号：US17900725

申请日：2022-08-31

Applicant: Apple Inc.

Inventor： Danyom Berhane ,  Brian B. Whitaker ,  Mohammad B. Vahid Far ,  Tracey L Chavers

IPC: H04B1/525 ,  H04B1/04 ,  H04B1/44

Abstract: An electronic device may include a transceiver, an antenna, and a front end module (FEM) coupled between the transceiver and antenna. Components on the FEM may operate on radio-frequency signals. The FEM may include a digital controller with a leakage management engine. The leakage management engine may monitor power supply voltages received by the FEM. In response to detection of a trigger condition, the leakage management engine may power off a set of the components while at least some of the FEM remains powered on. The trigger condition may be a change in the power supply voltages or a host command received from a host processor. Using the leakage management engine to power off the set of front end components may serve to minimize leakage current on the FEM, thereby maximizing battery life and shelf life for the device, without the use of bulky and expensive external load switches.