Patents Represented by Attorney, Agent or Law Firm Leydig, Vit & Mayer, Ltd.
  • Substrate bias voltage generating circuit
    Patent number: 6700434
    Abstract: Oscillation outputs which are different for respective detector signals output from a first detector circuit and a second detector circuit, are obtained from a first ring oscillator and a second ring oscillator respectively corresponding to the detector circuits. A selector selects and outputs one of the oscillation outputs. Accordingly, it is sufficient to provide only one pump circuit in a circuit producing a substrate bias voltage.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: March 2, 2004
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Engineering Co., Ltd.
    Inventors: Nobuyuki Fujii, Fukashi Morishita, Mihoko Akiyama, Akira Yamazaki, Mako Kobayashi, Yasuhiko Taito