公开(公告)号：US10079584B1

公开(公告)日：2018-09-18

申请号：US15458698

申请日：2017-03-14

Applicant: Futurewei Technologies, Inc.

Inventor： Lei Jing ,  Peter Ossieur ,  Ning Cheng ,  Naresh Chand

IPC: H04B10/69 ,  H03G3/30 ,  H03F3/45 ,  H04Q11/00

Abstract: An optical network system comprising an optical line terminal (OLT) and an optical network unit (ONU) coupled to the OLT and configured to communicate with the OLT via an optical signal. At least one of the OLT or the ONU comprises a closed-loop gain controlled transimpedance amplifier (TIA) comprising a first amplifier configured to receive an input signal, generate a main output signal by amplifying the input signal according to a gain factor of the first amplifier, and generate an auxiliary output proportional to the input signal, an average detector coupled to the first amplifier and configured to receive the auxiliary output, and determine an average of the input signal according to the auxiliary output, and a feedback loop coupled to the first amplifier and the average detector and configured to control the gain factor of the first amplifier according to the average of the input signal.

公开(公告)号：US20180269844A1

公开(公告)日：2018-09-20

申请号：US15458698

申请日：2017-03-14

Applicant: Futurewei Technologies, Inc.

Inventor： Lei Jing ,  Peter Ossieur ,  Ning Cheng ,  Naresh Chand

IPC: H03G3/30 ,  H03F3/45 ,  H04Q11/00

Abstract: An optical network system comprising an optical line terminal (OLT) and an optical network unit (ONU) coupled to the OLT and configured to communicate with the OLT via an optical signal. At least one of the OLT or the ONU comprises a closed-loop gain controlled transimpedance amplifier (TIA) comprising a first amplifier configured to receive an input signal, generate a main output signal by amplifying the input signal according to a gain factor of the first amplifier, and generate an auxiliary output proportional to the input signal, an average detector coupled to the first amplifier and configured to receive the auxiliary output, and determine an average of the input signal according to the auxiliary output, and a feedback loop coupled to the first amplifier and the average detector and configured to control the gain factor of the first amplifier according to the average of the input signal.