Patents by Inventor Shigeyuki Ohsugi

Shigeyuki Ohsugi 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-type constant current power supply device
    Patent number: 7106037
    Abstract: Disclosed is a switching-type constant current power supply, which comprises an alteration circuit 9 provided on the output side of a power conversion circuit 3 together with a voltage detection circuit 7, and a feedback circuit 8 provided between the voltage detection circuit 7, a current detection circuit 5 and a control circuit 4. The alteration circuit 9 is operable, during a current flow period where a load current IL is flowing, to set the signal level of a second feedback signal F2 at a value less than a reference voltage Vref to be supplied to a common error amplifier EA1 in a control circuit 4, and operable, during a current cut-off period where the load current IL is not flowing, to set the signal level of the second feedback signal F2 at a value greater than the reference voltage Vref.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: September 12, 2006
    Assignee: Toko, Inc.
    Inventors: Tetsushi Ohtake, Shigeyuki Ohsugi
  • Switching-type constant current power supply device
    Publication number: 20050002134
    Abstract: Disclosed is a switching-type constant current power supply, which comprises an alteration circuit 9 provided on the output side of a power conversion circuit 3 together with a voltage detection circuit 7, and a feedback circuit 8 provided between the voltage detection circuit 7, a current detection circuit 5 and a control circuit 4.
    Type: Application
    Filed: June 28, 2004
    Publication date: January 6, 2005
    Inventors: Tetsushi Ohtake, Shigeyuki Ohsugi