Writable distributed non-volatile analog reference system and method for analog signal recording and playback
CA 2092539 A1 · Owner: Information Storage Devices, Inc. · Inventors: Simko, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A writable distributed non-volatile analog reference system and method for analog signal recording and playback having application in integrated circuits which sample and directly store analog information (ANAIN). The invention is useful to facilitate the sensing of analog levels stored in nonvolatile memory cells (10) where the analog levels are played back such as to reproduce voice or music or tone information. In accordance with the method one or, more reference storage columns (11L 11R, 12L, 12R) are included, in the array (10) at each side of the storage cell array (10) and are used to store a referene signal at the same time that the adjacent storage cell stores a signal sample. On …
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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 September 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2013.
- 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
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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.