Patents by Inventor Nobutake Yamaichi

Nobutake Yamaichi 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
    Patent number: 6373730
    Abstract: A switching power supply has a switching circuit for supplying a predetermined output voltage regardless of load variations and converting input voltages into the predetermined output voltage; pulse width control circuit for controlling the switching circuit; a circuit for detecting load power; and an oscillation frequency variable oscillation circuit. Such arrangement can change the switching frequencies and prevent a decrease in efficiency under low load.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: April 16, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akeyuki Komatsu, Nobutake Yamaichi