Voltage step up circuit for magnetometric sensor
CA 2223767 A1 · Owner: Itozaki, Hideo · Inventors: Toyoda, Haruhisa; Nagaishi, Tatsuoki; Itozaki, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an improved and simplified voltage step-up circuit (2) for a SQUID magnetometric sensor (1) which, provides step-up of a voltage signal generated by a SQUID element (11). The SQUID element is exited by a modulated signal using the FLL method. In an example, a step-up means (22) comprises only one step-up transformer (22T) working at room temperature and an electronic amplifier (22A). The voltage signal is first stepped up by the transformer. A signal processing means (23) processes the stepped up signal with the modulation signal to output a magnetic field measurement signal (V~). In another example a bias current source (21) is also connected to terminals …
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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 4, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 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.
Timeline
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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.