Patents by Inventor Asami Saito

Asami Saito 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).

  • Patent number: 7538707
    Abstract: A digital-to-analog converting circuit includes: 2N or more number of digital-to-analog converting elements converting an input digital code of N+1 (N is an integer equal to or more than two) values to an analog code to output; a selecting section selecting N-number of digital-to-analog converting elements; and a control section controlling a second selecting so that each of at least N-number of digital-to-analog converting elements used for the digital-to-analog converting does not continuously output the same analog code at a second digital-to-analog converting timing following a first selecting of the N-number of digital-to-analog converting elements by the selecting section at a first digital-to-analog converting timing.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: May 26, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Satoshi Sakurai, Asami Saito
  • Patent number: 7423571
    Abstract: A resistor-string digital/analog converter circuit includes a plurality of resistors configured to divide a predetermined voltage, a plurality of MOS transistors configured to divide a voltage generated across one resistor of the plurality of resistors, a control circuit configured to control a connection between the one resistor and the plurality of MOS transistors so as to supply to the plurality of MOS transistors the voltage generated across the one resistor, and a gate potential generating circuit. The gate potential generating circuit generates a plurality of mutually different gate potentials and supplies the plurality of generated gate voltages, respectively, to a plurality of gates of the plurality of MOS transistors, so that the resistance values of MOS resistance of the plurality of MOS transistors are equal to each other.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: September 9, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Asami Saito, Satoshi Sakurai
  • Patent number: 7358886
    Abstract: According to this invention, there is provided a voltage output digital-to-analog converter circuit, including other ones of the second resistive elements and third resistive elements having a desired resistance value are series-connected between the other ends of the second resistive elements, which are connected to switching elements of the plurality of switching elements to which a most significant bit and a least significant bit are supplied, and the ground.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: April 15, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Asami Saito
  • Publication number: 20080079619
    Abstract: A digital-to-analog converting circuit includes: 2N or more number of digital-to-analog converting elements converting an input digital code of N+1 (N is an integer equal to or more than two) values to an analog code to output; a selecting section selecting N-number of digital-to-analog converting elements; and a control section controlling a second selecting so that each of at least N-number of digital-to-analog converting elements used for the digital-to-analog converting does not continuously output the same analog code at a second digital-to-analog converting timing following a first selecting of the N-number of digital-to-analog converting elements by the selecting section at a first digital-to-analog converting timing.
    Type: Application
    Filed: September 26, 2007
    Publication date: April 3, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Satoshi Sakurai, Asami Saito
  • Publication number: 20070132622
    Abstract: According to this invention, there is provided a voltage output digital-to-analog converter circuit, including other ones of the second resistive elements and third resistive elements having a desired resistance value are series-connected between the other ends of the second resistive elements, which are connected to switching elements of the plurality of switching elements to which a most significant bit and a least significant bit are supplied, and the ground.
    Type: Application
    Filed: December 12, 2006
    Publication date: June 14, 2007
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Asami Saito
  • Publication number: 20070052569
    Abstract: A resistor-string digital/analog converter circuit includes a plurality of resistors configured to divide a predetermined voltage, a plurality of MOS transistors configured to divide a voltage generated across one resistor of the plurality of resistors, a control circuit configured to control a connection between the one resistor and the plurality of MOS transistors so as to supply to the plurality of MOS transistors the voltage generated across the one resistor, and a gate potential generating circuit. The gate potential generating circuit generates a plurality of mutually different gate potentials and supplies the plurality of generated gate voltages, respectively, to a plurality of gates of the plurality of MOS transistors, so that the resistance values of MOS resistance of the plurality of MOS transistors are equal to each other.
    Type: Application
    Filed: September 5, 2006
    Publication date: March 8, 2007
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Asami Saito, Satoshi Sakurai