Patents by Inventor Ryuji FUJIME

Ryuji FUJIME 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).

  • Reference voltage generating circuit
    Patent number: 8823444
    Abstract: A reference voltage generating circuit comprises a pair of variable resistors connected to a pair of bipolar transistors. A differential amplifier amplifies the band gap voltage difference between the bipolar transistors and outputs a reference voltage to an output terminal. An output stage resistor is connected to the output terminal and a resistance dividing circuit. The generating circuit includes temperature compensating circuits that receive tap voltages from resistance dividing circuit and a current proportional to the temperature, then output correction currents. The generating circuit additionally includes a current mirror circuit that outputs a mirror current depending on each correction current. The reference voltage generating circuit thus corrects the temperature dependence of the reference voltage.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: September 2, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ryuji Fujime, Masaaki Morikawa
  • REFERENCE VOLTAGE GENERATING CIRCUIT
    Publication number: 20140084989
    Abstract: A reference voltage generating circuit comprises a pair of variable resistors connected to a pair of bipolar transistors. A differential amplifier amplifies the band gap voltage difference between the bipolar transistors and outputs a reference voltage to an output terminal. An output stage resistor is connected to the output terminal and a resistance dividing circuit. The generating circuit includes temperature compensating circuits that receive tap voltages from resistance dividing circuit and a current proportional to the temperature, then output correction currents. The generating circuit additionally includes a current mirror circuit that outputs a mirror current depending on each correction current. The reference voltage generating circuit thus corrects the temperature dependence of the reference voltage.
    Type: Application
    Filed: March 8, 2013
    Publication date: March 27, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryuji FUJIME, Masaaki MORIKAWA