Mos charge pump generation and regulation method and apparatus
CA 2216891 C · Owner: Information Storage Devices, Inc. · Inventors: Tran, Hieu Van
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
MOS charge pump generation and regulation method and apparatus of the general type used in a non-volatile memory chip for generating high voltages (~20v). This invention utilizes a current controlled oscillator to generate the clock for the charge pump voltage multiplier. The oscillator frequency is designed to compensate for process temperature, and power supply variations. The charge pump shunt regulator only utilizes regular low voltage NMOS and PMOS from a standard CMOS process. A reference voltage scheme is used in which a regular low voltage PMOS is used as a mirror diode (reference PMOS) to precisely realize a control voltage for the shunting NMOS without violating any breakdown …
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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 30, 1997 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.