公开(公告)号：US20240429898A1

公开(公告)日：2024-12-26

申请号：US18339159

申请日：2023-06-21

Applicant: Apple Inc.

Inventor： Milad Darvishi ,  Seyedmohammadreza Razavian

IPC: H03H11/24 ,  H01Q3/36

Abstract: An electronic device may have wireless circuitry that includes a differential signal path having first and second signal lines. A pi attenuator may be disposed on the differential signal path. The pi attenuator may include a first series resistor on the first signal line, a second series resistor on the second signal line, and parallel resistors coupled between the first and second signal lines on opposing sides of the series resistors. A first capacitor may couple an input terminal of the first series resistor to an output terminal of the second series resistor and a second capacitor may couple an output terminal of the first series resistor to an input terminal of the second series resistor. The capacitors may serve to minimize phase variation as a function of attenuation level in attenuated signals output by the pi attenuator.