Patents by Inventor Tomoyuki Nasu

Tomoyuki Nasu 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).

  • Start-up circuit and voltage supply circuit using the same
    Patent number: 6242898
    Abstract: A start-up circuit supplying a start-up current to a band gap reference voltage circuit at the time of start-up so as to start the band gap reference voltage circuit reliably, which stops the supply of the start-up current after the band gap reference voltage circuit starts operation in response to an output voltage of an operational amplifier supplied as the reference voltage of the band gap reference voltage circuit and, further, a voltage supply circuit, including such a start-up circuit and a band gap reference voltage circuit, which operates under the control of a feedback loop formed by the operational amplifier and outputs a constant voltage without dependency on the power supply voltage and the temperature.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: June 5, 2001
    Assignee: Sony Corporation
    Inventors: Yasuhide Shimizu, Tomoyuki Nasu