Patents by Inventor Takahashi Toshio

Takahashi Toshio 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).

  • Patent number: 6580627
    Abstract: A circuit for sensing the voltage across a power device, such as an insulated gate bipolar transistor (IGBT), that provides a power signal, such as to a motor. Where power devices are connected in a half bridge configuration, the sensing circuitry provides low side and high side sense signals. The signals indicate respectively when voltage changes across the low side and high side power devices. If on times of the devices are separated by deadtime, one sense signal can indicate the beginning of deadtime and the other can indicate the ending of the deadtime. The sensing circuitry can provide a sense result signal indicating whether voltage across the power device is greater than a reference voltage.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: June 17, 2003
    Assignee: International Rectifier Corporation
    Inventor: Takahashi Toshio