Feedback circuit for cmos high voltage generator to program (e)eprom-memory cells
CA 2127803 A1 · Owner: Seesink, Petrus Hendrikus · Inventors: Seesink, Petrus Hendrikus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Feedback circuit for a high voltage generator comprising several voltage multiplying stages connected in series wherein an, oscillator generates at least two clock pulses being 180· out of phase to one another, controlling alternately successive voltage multiplying stages to provide a high voltage pulse at the output of the high voltage generator, the high voltage output being connected to the feedback circuit generating a control signal supplied to the oscillator, so that the two clock pulses are modified in dependence on the high voltage output voltage wherein the feedback, circuit comprises a high voltage feedback circuit provided with a capacitive input stage (CP, CR), the output …
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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 December 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2014.
- 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.