Patents by Inventor Tadasi Kobayasi

Tadasi Kobayasi 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).

  • Flyback converter having a high efficiency irrespective of magnitude of a load
    Patent number: 5461555
    Abstract: In a converter which is usable as a kind of DC--DC converter and which comprises a transformer for processing an exciting current into an excited current under influence of an inductance value of the transformer, the inductance value is controlled in compliance with a value of the exciting current. The exciting current is controlled by a current control circuit with reference to the excited current so that exciting current is intermittently supplied to the transformer. While the exciting current is absent during intermittent supply to the transformer, the transformer produces the excited current.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: October 24, 1995
    Assignee: NEC Corporation
    Inventors: Tokimune Kitajima, Tadasi Kobayasi