公开(公告)号：US10592458B1

公开(公告)日：2020-03-17

申请号：US16134811

申请日：2018-09-18

Applicant: Apple Inc.

Inventor： Hao Shi ,  Gary S. Thomason ,  Abhilash Rajagopal ,  Jason W. Leung ,  Koussalya Balasubramanian ,  Venus Kumar

IPC: H03K17/16 ,  H03K19/003 ,  G06F13/40 ,  H04L25/02 ,  H01R13/646

Abstract: A data network may include a data bus and network nodes. The data bus may be a differential data bus having first and second differential signal lines that convey differential signals between the nodes. A bimodal impedance terminator may be coupled to the first and second differential signal lines at one or both ends of the data bus. The bimodal impedance terminator may include a first resistor coupled between the first differential signal line and a circuit node and a second resistor coupled between the second differential signal line and the circuit node. A capacitor may be coupled between the circuit node and ground. A third resistor may be coupled between the circuit node and ground in series with the capacitor. The bimodal impedance terminator may terminate both the differential-mode impedance and the common-mode impedance of the data bus to reduce signal reflections at the ends of the data bus.

公开(公告)号：US20200089643A1

公开(公告)日：2020-03-19

申请号：US16134811

申请日：2018-09-18

Applicant: Apple Inc.

Inventor： Hao Shi ,  Gary S. Thomason ,  Abhilash Rajagopal ,  Jason W. Leung ,  Koussalya Balasubramanian ,  Venus Kumar

IPC: G06F13/40 ,  H01R13/646 ,  H04L25/02

Abstract: A data network may include a data bus and network nodes. The data bus may be a differential data bus having first and second differential signal lines that convey differential signals between the nodes. A bimodal impedance terminator may be coupled to the first and second differential signal lines at one or both ends of the data bus. The bimodal impedance terminator may include a first resistor coupled between the first differential signal line and a circuit node and a second resistor coupled between the second differential signal line and the circuit node. A capacitor may be coupled between the circuit node and ground. A third resistor may be coupled between the circuit node and ground in series with the capacitor. The bimodal impedance terminator may terminate both the differential-mode impedance and the common-mode impedance of the data bus to reduce signal reflections at the ends of the data bus.