公开(公告)号：US20250102553A1

公开(公告)日：2025-03-27

申请号：US18745101

申请日：2024-06-17

Applicant: Apple Inc.

Inventor： Michael D. Eaton ,  Dong Zheng ,  Stephen N. Sweet

IPC: G01R31/00 ,  G01R29/08

Abstract: An electronic device may have a sensor and may have a radio-frequency signal transmitter. The sensor may be vulnerable to electromagnetic interference (EMI) from the radio-frequency (RF) signals. Therefore, circuitry in the device may determine whether measurements from the sensor have been impacted by EMI. To make this determination, a digital filter may be used. In particular, the digital filter may be a digital persistence filter that generates a signal if the sensor measurement is high for a time that corresponds with the known emission time of the RF signals. Alternatively, the digital filter may receive the sensor measurements in the digital domain and compare the sensor measurements to time-delayed sensor measurements to determine whether the sensor measurements have been impacted by EMI. Control circuitry may discard any of the sensor measurements, or measurements from one or more other sensors, in response to the sensor measurements being impacted by EMI.