Standing sine wave clock bus for clock distribution systems
CA 2174728 C · Owner: General Datacomm, Inc. · Inventors: Reymond, Welles K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A clock phase and frequency distribution system (10) is disclosed which uses a standing sine wave and provides substantially simultaneous significant crossing instances everywhere in the system while using low power and not requiring bus termination or precise control of the transmission path characteristics (Zo). The system is particularly advantageous in high frequency applications such as digital linear (non-branched), backplane applications but is also applicable to other topographies such as stars rings and meshes. The system, includes a sine wave generating (20) and driving circuit (42) a clock bus (25) and clock receivers (30a...n). The clock receivers (30a...n) present a high …
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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
- Filed October 25, 1994 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2016.
- 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.