Low loss snubber circuit with active recovery switch
CA 2086892 C · Owner: Argus Technologies Ltd. · Inventors: Davidson, Christopher Donovan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switch mode power converter includes a snubber diode and a snubber capacitor arranged in series with one another across the switching element of the converter. A discharge path is provided for discharging the capacitor by including a second diode, a switch and an inductor extending in series from the node between the snubber diode and the snubber capacitor to the line side of the transformer. The inductor may be coupled to a winding in series with a diode to allow clamping of the voltage across the inductor.
Read the whole patent
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 January 7, 1993 and granted April 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2015.
- 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.