Frequency-independent, self-clocking encoding technique and apparatus for digital communications
CA 1193733 A · Owner: Digital Equipment Corporation · Inventors: Mclean, Peter T.; Sergeant, O. Winston
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-clocking encoding technique for synchronous transmission of digital signals, and apparatus therefor. In an exemplary embodiment the encoding technique, utilizes relatively positive and relatively negative pulses of fixed, predetermined duration. For electrical pulses, the point of reference is preferably a zero baseline. At the leading edge LEi of the ith bit cell the value of the ith bit is encoded as a positive pulse in the case of a logical "1" (e.g. 82A) or a negative pulse (e.g.' 82B) in the case of a logical "0" (Step 41 42A, 42B). Further, if the next subsequent (i.e. (i + 1)th bit has the same value, a pulse of the opposite polarity is injected into the ith bit cell after the …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.