Patents by Inventor Akihiro Hirase

Akihiro Hirase has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Switching power supply, electronic apparatus, and method of controlling switching power supply circuit
    Publication number: 20080007237
    Abstract: A switching power supply device may include a switching element for switching an input direct-current power, a smoothing section for smoothing and then outputting the direct-current power switched by the switching element, a square wave generating section for generating a square wave with a constant duty cycle to control switching by the switching element, and a control section for watching an output voltage of the smoothing section to control a period of generating the square wave generated by the square wave generating section so that the output voltage may be organized within a certain range.
    Type: Application
    Filed: May 16, 2007
    Publication date: January 10, 2008
    Applicant: Sony Corporation
    Inventors: Takayuki Nagashima, Shinji Nakamura, Akihiro Hirase