公开(公告)号：US11184196B1

公开(公告)日：2021-11-23

申请号：US17125605

申请日：2020-12-17

Applicant: OmniVision Technologies, Inc.

Inventor： Li Yang ,  Charles Qingle Wu ,  Nan Liu

IPC: H04L25/02 ,  H04L25/08

Abstract: A digital differential line receiver includes a differential signal to single-ended conversion amplifier coupled to receive a data line and data-complement line of a differential signal; a first termination resistor coupled to the data line of the differential signal; a second termination resistor coupled to the data-complement line of the differential signal; a first impedance-adjusting transistor coupled between the first termination resistor and a common mode line; a second impedance-adjusting transistor coupled between the second termination resistor and the common mode line; a control-voltage generator coupled to sense the common mode line and provide a control voltage, the control voltage generator configured to adjust the control voltage to a voltage level such that a combined impedance of the first termination resistor, the first impedance-adjusting transistor, the second termination resistor, and the second impedance-adjusting transistor matches a specified impedance.