Current sensor circuit
CA 2032365 C · Owner: Toyo Communication Equipment Co. Ltd. · Inventors: Kashiwa, Takeo; Habiro, Tetsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A current sensor circuit for measuring by means of a Hall element the magnitude of a magnetic flux obtained in response to an input electric current and for generating a signal corresponding to the result of measurement wherein a, Hall element (2) is driven by a voltage obtained by a voltage follower-type voltage generating unit (4) whose output voltage changes by following a supply voltage and, the voltage obtained by the voltage generating unit is applied as an offset compensating voltage thereby, simplifying the circuit of a Hall element portion. In addition, a forward threshold voltage and a reverse threshold voltage that are used in a forward comparator unit (6) and a reverse …
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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 14, 1990 and granted August 2, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2012.
- 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.