Multiplier and squaring circuit to be used for the same
CA 2062875 C · Owner: Nec Corporation · Inventors: Kimura, Katsuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a multiplier comprising a first and second squaring circuits each having a differential input terminal pair whose outputs are connected in common. A first input terminal of the first squaring circuit is applied with a first input voltage and a second input terminal thereof is applied with a second input voltage opposite in phase to the first input voltage. A first input terminal of the second squaring circuit is applied with the second input voltage and a second input terminal thereof is applied with the first input voltage. The first and second squaring circuits each includes two sets of unbalanced differential transistor pairs which are arranged so that their inputs are …
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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 March 12, 1992 and granted May 13, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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.