A.c. solid state relay circuit and thyristor structure
CA 1237170 A · Owner: International Rectifier Corporation · Inventors: Herman, Thomas; Williams, Oliver
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A.C. SOLID STATE RELAY CIRCUIT AND THYRISTOR STRUCTURE ABSTRACT OF THE DISCLOSURE, A solid state a.c. relay has two separate and identical power thyristors connected in anti-parallel arrangement. The power thyristors are each optically switched lateral con-, duction devices with anode and cathode electrodes on the same surface. Both are switched by illuminating their surface by reflected illumination from an LED. Each thyristor is provided with a respective control circuit which includes a MOS- FET transistor for clamping its respective thyristor gate whenever the voltage across the thyristor exceeds a given absolute value or whenever there is a high dV/dt transient across the thyristor. …
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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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.