公开(公告)号：US20170353291A1

公开(公告)日：2017-12-07

申请号：US15614613

申请日：2017-06-06

Applicant: Apple Inc.

Inventor： Hsiao-Ping Tsai ,  William P. Cornelius

IPC: H04L7/033 ,  H04L1/00

CPC classification number: H04L7/0338

Abstract: Circuits, methods, and apparatus that may reconstruct a data signal in the presence of ground drift and high-frequency signal coupling. An illustrative embodiment of the present invention may reconstruct a received data signal by taking an finite difference of the received data signal, detecting edges of the received data signal by detecting positive and negative peaks of the finite difference of the received signal, and reconstructing the received data signal using the detected edges. Taking a finite difference of the received data signal removes the DC component of the received data signal, as well as the ground drift that may cause the DC component of the received data signal to change over time. Additional filtering may be used to reduce high-frequency signal coupling and power supply inductive coupling.

公开(公告)号：US10200190B2

公开(公告)日：2019-02-05

申请号：US15614613

申请日：2017-06-06

Applicant: Apple Inc.

Inventor： Hsiao-Ping Tsai ,  William P. Cornelius

IPC: H04L7/033

Abstract: Circuits, methods, and apparatus that may reconstruct a data signal in the presence of ground drift and high-frequency signal coupling. An illustrative embodiment of the present invention may reconstruct a received data signal by taking an finite difference of the received data signal, detecting edges of the received data signal by detecting positive and negative peaks of the finite difference of the received signal, and reconstructing the received data signal using the detected edges. Taking a finite difference of the received data signal removes the DC component of the received data signal, as well as the ground drift that may cause the DC component of the received data signal to change over time. Additional filtering may be used to reduce high-frequency signal coupling and power supply inductive coupling.