Apparatus and method for decoding differential multi-level data

Details Apparatus and method for decoding differential multi-level data Apparatus and method for decoding differential multi-level data

1998-03-25

1999-10-19

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

To or from particular bit symbol

375289, H03M 508, H04L 2534

Patent

active

059696460

ABSTRACT:
An improved decoder for recovering Non-Return-to-Zero Interface (NRZI) digital data from a multiple layer transition (MLT-3) encoded signal in a 100BASE-TX Ethernet (IEEE Standard 802.3u) uses multiple comparators to minimize jitter in the decoded signal. A CMOS-based biasing circuit receives the differential MLT-3 encoded input signals and control signals from a signal amplitude detection circuit. The biasing circuit adjusts for any DC offset, and also generates offset signals based on respective mid-peak voltage values of the respective differential input signals. Four comparators are then used to detect a prescribed edge transition (e.g., a positive edge) coinciding with the respective mid-peak voltage value in the respective signals. The detected edge transitions are then used by edge decoding logic to generate the NRZI bilevel signal.

REFERENCES:
patent: 5378946 (1995-01-01), Reime
patent: 5459749 (1995-10-01), Park
patent: 5799043 (1998-08-01), Chang et al.

Affiliated with

Also associated with

Rating

Apparatus and method for decoding differential multi-level data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for decoding differential multi-level data , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for decoding differential multi-level data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2061674