Patents Assigned to Hitachi ULSI Engineering
  • Reference voltage generator
    Patent number: 5384740
    Abstract: An apparatus includes a constant voltage generator for generating a voltage based on a difference between threshold voltages of two MOS transistors, and a voltage sampling device for sampling the output voltage of the constant voltage generator circuit, wherein the voltage sampling device samples the output voltage of the constant voltage generator before an electric source switch for the constant voltage generator is turned off.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: January 24, 1995
    Assignees: Hitachi, Ltd., Hitachi ULSI Engineering
    Inventors: Jun Etoh, Yoshinobu Nakagome, Hitoshi Tanaka, Koji Kawamoto, Masakazu Aoki