Circuit for generating a stretched clock in quarter-cycle increments
CA 2096469 A1 · Owner: Kenny, John D. · Inventors: Kenny, John D.; Lee, Robert H. J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Robert H.J. Lee John D. Kenny, The time a microprocessor CPU must wait for memory access is controlled to be one of two values by stretching the CPU clock signal either a first time duration or a second time duration, depending on the expected delay caused by the memory access. The clock stretching is in increments of one quarter of the CPU clock period and is done with both the leading and trailing edges of the clock pulse.
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
- Filed May 18, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2015.
- 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.