Switch mode power supply protective circuit arrangement
CA 1294325 C · Owner: Siemens Aktiengesellschaft · Inventors: Schwarz, Ulf; Preis, Josef; Stolz, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A circuit arrangement for limiting the switch-on current and for providing an over voltage protection in switch-mode power supply devices, comprising an input-end storage capacitor (12) which forms a low-impedance voltage source for a connected current supply arrangement. A current supply device of this type is provided with a circuit which both limits the switch-on current and also ensures a protection against excess voltages across the storage capacitor (12). This is achieved with the assistance of a field-effect transistor (11) arranged between the supply voltage source (1) and the storage capacitor (12) and controlled both by an amplifier for current limitation and by a delay element …
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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 January 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 2009.
- 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.