Patents Examined by Brian Sircis
  • Semiconductor protection circuit
    Patent number: 6891707
    Abstract: In a semiconductor protection circuit comprising a low speed protection circuit having an overcurrent detector for detecting an overcurrent of a predetermined switching element and turning off the semiconductor switching element following detection of the overcurrent, and a high speed protection circuit turning off the semiconductor switching element based on a voltage signal proportional to an output voltage of the semiconductor switching element.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: May 10, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuaki Hiyama, Akihisa Yamamoto