Hybrid timing recovery for burst mode receiver in passive optical networks

Patent metadata

Field	Value
Publication number	US-9106400-B2
Application number	US-201213658341-A
Country	US
Kind code	B2
Filing date	Oct 23, 2012
Priority date	Oct 23, 2012
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

An apparatus for coarse phase alignment of an analog signal comprising: a tapped delay line, a coarse phase alignment logic circuit coupled to the tapped delay line, and a selector coupled to the tapped delay and the coarse phase alignment logic circuit. An apparatus for timing and data recovery for burst mode receivers comprising: a receiver, a coarse phase alignment circuit coupled to the receiver, at least one analog to digital converter (ADC) coupled to the coarse phase alignment circuit such that the coarse phase alignment circuit is positioned between the receiver and the ADC, and a fine phase alignment circuit coupled to the ADC such that the ADC is positioned between the coarse phase alignment circuit and the fine phase alignment circuit, wherein the fine phase alignment circuit produces a recovered data output.

First claim

What is claimed is:

1. An apparatus for coarse phase alignment of an analog signal comprising:
a tapped delay line configured to output N delayed signals, wherein each delayed signal has a delay based on a bit period, N, and M;
a coarse phase alignment logic circuit coupled to the tapped delay line; and
a selector coupled to the tapped delay line and the coarse phase alignment logic circuit and configured to receive the N delayed signals, wherein N is an integer greater than 1…

Assignees

• Futurewei Technologies Inc

Inventors

• Cheng Ning

Classifications

• H04L7/0331

  Electricity · mapped topic

• H04L7/0338

  Electricity · mapped topic

• H04L7/0335 Primary

  Electricity · mapped topic