Motor driving power supply apparatus including switching regulatorcontrol loop
CA 1296763 C · Owner: Miyazaki, Hideto · Inventors: Miyazaki, Hideto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a power supply apparatus for driving a DC motor of a car cassette player, there are provided a switching regulator circuit for regulating a DC (direct current) input voltage to produce a desired DC output voltage; a motor driving circuit for driving a motor by receiving the DC output voltage of the switching regulator circuit; a sensor element for sensing a speed of the motor to output a sensor signal; a motor speed judging circuit for comparing said sensor signal from the sensor element with a reference signal to produce a judgement signal; and, a control voltage generating circuit for producing a control voltage based upon the judgement signal of the motor speed judgement circuit …
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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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.