Circuit for preventing a microcomputer from malfunctioning
CA 1286780 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Shigihara, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A train of pulses within a predetermined cycle is produced at a first port of a microcomputer when the microcomputer is operating normally. An operational amplifier compares a voltage obtained by rectifying the pulse train with a reference potential. The microcomputer is reset, depending on the comparison result obtained at the output terminal of the operational amplifier. The output of a power supply circuit is used as a reference potential. When an overcurrent flows in peripheral circuits connected to the microcomputer the, output voltage of the power supply circuit is decreased. This decrease varies the reference potential applied to the operational amplifier. The microcomputer outputs a …
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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
- Granted July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.