Patents by Inventor Tomohiro Oka

Tomohiro Oka 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).

  • Boosting and step-down switching regulator controlling circuit and boosting and step-down switching regulator for use in the same
    Publication number: 20030052654
    Abstract: A boosting and step-down switching regulator includes one error amplifying circuit, and an output of the error amplifying circuit is compared with a triangular wave for boosting and a triangular wave for step-down different in voltage level from each other but synchronous with, each other in comparison circuits, respectively, to switch the boosting operation and the step-down operation over to each other. Thus, the boosting operation and the step-down operation can be readily switched over to each other irrespective of an input voltage and an output voltage.
    Type: Application
    Filed: August 6, 2002
    Publication date: March 20, 2003
    Inventors: Yoshihide Kanakubo, Tomohiro Oka, Takeshi Naka