Bit rate-insensitive mechanism for transmitting integrated clock

Pulse or digital communications – Multilevel – Synchronized

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

375359, 341 70, H04L 2549

Patent

active

055508642

ABSTRACT:
A totally D.C. balanced and bit-rate independent digital clock encoding technique is applicable to a variety of digital signalling systems, including fiber optic digital signalling. Each of successive event cells of the clock signal is demarcated by clock transitions of opposite polarity, so that each clock cycle contains two event cells, one of which is redundant. For a first binary data value, such as a `0`, a pair of unmodified successive event cells of the clock signal are provided as an output. Namely, the clock signal is unaffected, so that both halves of a complete, unmodified clock cycle are reproduced `as is` as the encoded clock output. For a second binary data value, such as a `1`, an event cell is modified by inserting a pulse, of finite duration, less than the duration of the event cell, the pulse being delayed with respect to a leading clock transition of the pair of alternating, opposite clock transitions of the event cell. Since event cells are encoded in pairs, in order to provide redundancy and achieve total D.C. balance, the first pulse has a first polarity, while the second pulse has a second, complementary polarity. Because the encoding mechanism of the present invention has built-in redundancy, it readily accommodates both quality monitoring at the receiver, as well as sub-rate channel signalling.

REFERENCES:
patent: 4001578 (1977-01-01), Cook et al.
patent: 4267595 (1981-05-01), Hernandez
patent: 4888791 (1989-12-01), Barndt, Sr.
patent: 4954825 (1990-09-01), Chi
patent: 5319771 (1994-06-01), Takeda

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Bit rate-insensitive mechanism for transmitting integrated clock does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bit rate-insensitive mechanism for transmitting integrated clock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bit rate-insensitive mechanism for transmitting integrated clock will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1061772

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.