Patents by Inventor Go KAWATA

Go KAWATA 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).

  • Publication number: 20150137858
    Abstract: In one embodiment, a buffer circuit includes a first transistor, a second transistor, a first current source, a third transistor, a fourth transistor, a second current source, and a third current source. The first transistor has a control terminal connected to an input terminal, and a first terminal connected to an output terminal. The second transistor has a control terminal connected to the input terminal, a first terminal connected to the output terminal, and a second terminal connected to a first power source. The third transistor has a first terminal connected to the output terminal. The fourth transistor has a first terminal connected to the second terminal of the first transistor, a control terminal applied bias voltage, and a second terminal connected to a control terminal of the third transistor.
    Type: Application
    Filed: November 13, 2014
    Publication date: May 21, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tetsuro ITAKURA, Masanori Furuta, Shunsuke Kimura, Go Kawata, Hideyuki Funaki
  • Publication number: 20150130538
    Abstract: In one embodiment, a differential amplifier circuit includes a first input terminal, a second input terminal, a first transistor, a second transistor, a third transistor, a current source, a first output terminal, a second output terminal, a first passive element, and a second passive element. The first (second) transistor has a control terminal connected to the first (second) input terminal. The third transistor has a control terminal. The control terminal is applied predetermined bias voltage. The current source is connected to a first terminal in each of the first transistor, second transistor, and third transistor. The first (second) output terminal is connected to a second terminal of the first (second) transistor. The first (second) passive element is connected between the first (second) input terminal and the first (second) output terminal.
    Type: Application
    Filed: October 30, 2014
    Publication date: May 14, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tetsuro ITAKURA, Masanori FURUTA, Shunsuke KIMURA, Go KAWATA, Hideyuki FUNAKI
  • Publication number: 20150085985
    Abstract: According to an embodiment, a signal processing device includes an integrator, a first analog-to-digital converter, and a histogram creator. The integrator is configured to integrate an electrical charge corresponding to electromagnetic waves. The first analog-to-digital converter is configured to perform an analog-to-digital conversion operation that generates digital data of the electrical charge using an integration output from the integrator, on a parallel with an integration operation performed by the integrator. The histogram creator is configured to create a histogram that represents an energy distribution of the electromagnetic waves, from the digital data generated by the first analog-to-digital converter.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 26, 2015
    Inventors: Hideyuki FUNAKI, Shunsuke KIMURA, Go KAWATA, Tetsuro ITAKURA, Masanori FURUTA
  • Publication number: 20150084802
    Abstract: According to an embodiment, a signal processing device includes an integrator, a setting unit, and an analog-to-digital converter. The integrator is configured to integrate an electrical charge corresponding to electromagnetic waves. The integrator includes a capacitor configured to store the electrical charge corresponding to the electromagnetic waves and a discharging circuit configured to discharge the capacitor. The setting unit is configured to set a period of integration of the electrical charge with respect to the integrator. The analog-to-digital converter includes a comparator configured to compare an integration output and a threshold value and a counter configured to output, as digital data of the electrical charge, the number of times for which a value of the integration output becomes not less than the threshold value. The converter is configured to discharge the capacitor during the period of integration by supplying a comparison output of the comparator to the discharging circuit.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 26, 2015
    Inventors: Shunsuke KIMURA, Hideyuki FUNAKI, Go KAWATA, Tetsuro ITAKURA, Masanori FURUTA
  • Publication number: 20150084149
    Abstract: A radiation detector according to an embodiment includes: a semiconductor substrate; a light detecting unit provided on a side of a first surface of the semiconductor substrate; a first insulating film provided covering the light detecting unit; a second insulating film covering the first insulating film; a scintillator provided on the second insulating film; an interconnection provided between the first and second insulating films, and connected to the light detecting unit; a first electrode connected to the interconnection through a bottom portion of the first opening; a second electrode provided on a region in the second surface of the semiconductor substrate, the region opposing at least a part of the light detecting unit; a second opening provided in a region surrounding the first electrode and not surrounding the second electrode; and an insulating resin layer covering the first and second electrodes and the first and second openings.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 26, 2015
    Inventors: Hitoshi YAGI, Rei HASEGAWA, Masaki ATSUTA, Yasuharu HOSONO, Keita SASAKI, Go KAWATA
  • Patent number: 8988267
    Abstract: According to an embodiment, a signal processing device includes an integrator, a setting unit, and an analog-to-digital converter. The integrator is configured to integrate an electrical charge corresponding to electromagnetic waves. The integrator includes a capacitor configured to store the electrical charge corresponding to the electromagnetic waves and a discharging circuit configured to discharge the capacitor. The setting unit is configured to set a period of integration of the electrical charge with respect to the integrator. The analog-to-digital converter includes a comparator configured to compare an integration output and a threshold value and a counter configured to output, as digital data of the electrical charge, the number of times for which a value of the integration output becomes not less than the threshold value. The converter is configured to discharge the capacitor during the period of integration by supplying a comparison output of the comparator to the discharging circuit.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shunsuke Kimura, Hideyuki Funaki, Go Kawata, Tetsuro Itakura, Masanori Furuta
  • Publication number: 20130248724
    Abstract: A radiation detection apparatus according to an embodiment includes: a scintillator including a fluorescent material to convert radiation to visible radiation photon; a photon detection device array having a plurality of cells each of which includes a photon detection device to detect visible radiation photon emitted from a fluorescent material in the scintillator and convert the visible radiation photon to an electric signal; and a plurality of lenses provided on cells respectively in association with the cells to cause the visible radiation photon to be incident on the photon detection device in an associated cell.
    Type: Application
    Filed: December 13, 2012
    Publication date: September 26, 2013
    Inventors: Go KAWATA, Hideyuki Funaki, Honam Kwon, Risako Ueno, Kazuhiro Suzuki