Patents by Inventor Takeyasu Nakai

Takeyasu Nakai 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).

  • Voltage controlled ring oscillator and charge pump circuit
    Patent number: 6054904
    Abstract: A voltage controlled ring oscillator has a current control circuit and an odd number of inverter circuits. Each inverter circuit has a current charge preventing circuit connected between a ground voltage and a connection node located between a current source transistor and a complementary transistor circuit and a current discharge preventing circuit connected between a high voltage power source and a connection node located between a current source transistor and a complementary transistor circuit.
    Type: Grant
    Filed: September 17, 1998
    Date of Patent: April 25, 2000
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Engineering Company Limited
    Inventors: Hisao Katoh, Takeyasu Nakai