Patents by Inventor Masaya Kibune

Masaya Kibune 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: 11138505
    Abstract: A method of generating a neural network may be provided. A method may include applying non-linear quantization to a plurality of synaptic weights of a neural network model. The method may further include training the neural network model. Further, the method ma include generating a neural network output from the trained neural network model based on or more inputs received by the trained neural network model.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: October 5, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Masaya Kibune, Xuan Tan
  • Publication number: 20190197395
    Abstract: A method of generating a model ensemble may be provided. A method may include training a base model including a plurality of layers. The method may also include generating a plurality of models for the neural network based on the base model. Each model of the plurality of models includes a plurality of layers. Further, the method may include modifying a layer of each of the plurality of models such that each model of the plurality of models includes a layer modified with respect to an associated layer of each of the base model and each of the other plurality of models. In addition, the method may include tuning each modified layer of the plurality of models.
    Type: Application
    Filed: December 21, 2017
    Publication date: June 27, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Masaya KIBUNE, Xuan TAN
  • Publication number: 20190197408
    Abstract: A method of generating a neural network may be provided. A method may include applying non-linear quantization to a plurality of synaptic weights of a neural network model. The method may further include training the neural network model. Further, the method ma include generating a neural network output from the trained neural network model based on or more inputs received by the trained neural network model.
    Type: Application
    Filed: December 21, 2017
    Publication date: June 27, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Masaya KIBUNE, Xuan TAN
  • Publication number: 20170359153
    Abstract: A method of measuring linearity characteristics of a delay line may be provided. The method may include generating an output signal from a receiver including a delay line. The method may also include measuring linearity characteristics of the delay line based on a target performance parameter of the output signal.
    Type: Application
    Filed: June 14, 2016
    Publication date: December 14, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Daisuke USUI, Masaya KIBUNE, Nikola NEDOVIC
  • Patent number: 9509327
    Abstract: An A/D converter includes an A/D conversion unit, a histogram generation-storage unit, and a control unit. The A/D conversion unit is configured to receive an input voltage, perform an analog-to-digital conversion, and output digital data, and the histogram generation-storage unit is configured to receive the digital data, generate a histogram for a waveform of the input voltage, and store the generated histogram therein. The control unit is configured to control an analog-to-digital conversion characteristics of the A/D conversion unit, based on the histogram stored in the histogram generation-storage unit.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: November 29, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Masaya Kibune, Sanroku Tsukamoto
  • Publication number: 20160173114
    Abstract: An A/D converter includes an A/D conversion unit, a histogram generation-storage unit, and a control unit. The A/D conversion unit is configured to receive an input voltage, perform an analog-to-digital conversion, and output digital data, and the histogram generation-storage unit is configured to receive the digital data, generate a histogram for a waveform of the input voltage, and store the generated histogram therein. The control unit is configured to control an analog-to-digital conversion characteristics of the A/D conversion unit, based on the histogram stored in the histogram generation-storage unit.
    Type: Application
    Filed: February 16, 2016
    Publication date: June 16, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Masaya KIBUNE, Sanroku TSUKAMOTO
  • Patent number: 9118451
    Abstract: A receiver circuit includes: an input ADC configured to convert an input data signal to sample data in accordance with a clock; a boundary phase computation circuit configured to determine the boundary phase of the input data signal based on the sample data; an eye pattern computation circuit configured to compute a maximum amplitude phase of an eye pattern of the input data signal based on the sample data and the boundary phase; and a determination circuit configured to determine a value of the input data signal in the maximum amplitude phase based on the sample data and the maximum amplitude phase.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: August 25, 2015
    Assignee: Fujitsu Limited
    Inventors: Masaya Kibune, Hirotaka Tamura
  • Publication number: 20140376675
    Abstract: A receiver circuit includes: an input ADC configured to convert an input data signal to sample data in accordance with a clock; a boundary phase computation circuit configured to determine the boundary phase of the input data signal based on the sample data; an eye pattern computation circuit configured to compute a maximum amplitude phase of an eye pattern of the input data signal based on the sample data and the boundary phase; and a determination circuit configured to determine a value of the input data signal in the maximum amplitude phase based on the sample data and the maximum amplitude phase.
    Type: Application
    Filed: February 25, 2014
    Publication date: December 25, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Masaya KIBUNE, Hirotaka TAMURA
  • Patent number: 8798568
    Abstract: A signal transmission method suppresses a reflected wave of a transmission signal on a transmission line, by obtaining level and time information related to the reflected wave by computing a correlation between a data pattern of the transmission signal and the reflected wave, and correcting a waveform of the transmission signal based on the level and time information related to the reflected wave.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: August 5, 2014
    Assignee: Fujitsu Limited
    Inventor: Masaya Kibune
  • Patent number: 8797076
    Abstract: A duty ratio correction circuit, includes: a frequency divider configured to output a second clock signal having a first level that is inverted at a timing of a first edge of a first clock signal and a third clock signal having a second level that is inverted at a timing of a second edge of the first clock signal; phase interpolator configured to generate a fourth clock signal and a fifth clock signal based on phase interpolation of any two of the second clock signal, the third clock signal, a first inverted signal that is obtained by inverting the second clock signal, or a second inverted signal that is obtained by inverting the third clock signal; and a multiplier configured to output an exclusive OR signal of the fourth clock signal and the fifth clock signal as a sixth clock signal.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: August 5, 2014
    Assignee: Fujitsu Limited
    Inventor: Masaya Kibune
  • Patent number: 8634454
    Abstract: A receiver circuit includes: an equalization circuit that equalizes a first signal to obtain a second signal, and adjusts a characteristic of an equalization in accordance with an error between the second signal and a third signal; and a first offset adjustment circuit that adjusts an offset of the first signal in accordance with an error signal indicating the error.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: January 21, 2014
    Assignee: Fujitsu Limted
    Inventors: Masaya Kibune, Hirotaka Tamura
  • Publication number: 20130328602
    Abstract: A duty ratio correction circuit, includes: a frequency divider configured to output a second clock signal having a first level that is inverted at a timing of a first edge of a first clock signal and a third clock signal having a second level that is inverted at a timing of a second edge of the first clock signal; phase interpolator configured to generate a fourth clock signal and a fifth clock signal based on phase interpolation of any two of the second clock signal, the third clock signal, a first inverted signal that is obtained by inverting the second clock signal, or a second inverted signal that is obtained by inverting the third clock signal; and a multiplier configured to output an exclusive OR signal of the fourth clock signal and the fifth clock signal as a sixth clock signal.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 12, 2013
    Inventor: Masaya KIBUNE
  • Publication number: 20130314142
    Abstract: A phase-combining circuit for combining cyclic timing waveforms that have been phase-controlled by control signals based on three or more input signals of different phases, has a weight signal generating circuit and a weighting circuit. The weight signal generating circuit generates weights according to the control signals, and the weighting circuit gives the weights to the respective input signals, with a positive or negative polarity for each one signal.
    Type: Application
    Filed: July 24, 2013
    Publication date: November 28, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Hirotaka TAMURA, Masaya KIBUNE
  • Patent number: 8588359
    Abstract: A reception circuit includes: an AD converter; an equalization circuit that equalizes an output of the AD converter; a determination circuit to which error information is input from the equalization circuit; and a controller that adjusts at least one of resolution and voltage range of the AD converter, in the circuit the determination circuit outputs a control signal to adjust at least one of resolution and voltage range to the controller based on the error information.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: November 19, 2013
    Assignee: Fujitsu Limited
    Inventor: Masaya Kibune
  • Patent number: 8319542
    Abstract: An integrated circuit includes a bypass signal path exchanging, between transceivers which are included in the integrated circuit, a signal transmitted/received between a transceiver of the transceivers and an internal logic circuit which processes data being input/output by transceiver with bypassing the internal logic circuit, a switch switching a pathway of the bypass signal path, and a switch changeover controller transferring a switch control signal that performs a changeover of the switch.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: November 27, 2012
    Assignee: Fujitsu Limited
    Inventors: Hirotaka Tamura, Masaya Kibune
  • Patent number: 8320503
    Abstract: A receiver that receives a train of a plurality of symbols representing digital data, includes: an isolated pulse detector that detects whether the digital data includes an isolated pulse in the symbol train, respectively; a phase detector that detects a timing at which the level of the symbols changes; a symbol value converter that converts the symbols into logical values on the basis of the timing detected by the phase detector; and a data selector that selects a logical value of the isolated pulse instead of the logical value converted by the symbol value converter when the isolated pulse detector detects the digital data containing the isolated pulse.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: November 27, 2012
    Assignee: Fujitsu Limited
    Inventors: Hirotaka Tamura, Masaya Kibune
  • Patent number: 8299948
    Abstract: A receiving circuit includes: a clock generating circuit to generate a plurality of clock signals in a cycle; an oversampling circuit to oversample input data based on the plurality of clock signals and output a plurality of samples of digital data in a unit interval; a data boundary determining circuit to detect a changing point of the digital data, determine data boundaries of the unit interval based on the changing point, and output digital data corresponding to a central data between the data boundaries; and a clock phase control circuit to control a phase of at least one of the plurality of clock signals so that a first number of the plurality of samples becomes a certain value when a second number of samples between the data boundaries is larger than a threshold value.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: October 30, 2012
    Assignee: Fujitsu Limited
    Inventors: Takayuki Shibasaki, Masaya Kibune, Takuji Yamamoto
  • Patent number: 8238504
    Abstract: A clock generation circuit includes: a first determination circuit that detects an input signal at a first phase position based on first frequency signal; a second determination circuit that detects the input signal at a second phase position based on second frequency signal; a phase detector that compares output of the first determination circuit and output of the second determination circuit; a first summing circuit which sums comparison result and first control signal; a second summing circuit which sums comparison result and second control signal; a first voltage controlled oscillation circuit which receives output of the first summing circuit and outputs the first frequency signal; a second voltage controlled oscillation circuit which received output of the second summing circuit and outputs the second frequency signal; and a phase adjustment circuit which generates first control signal and second control signal based on first frequency signal and second frequency signal.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: August 7, 2012
    Assignee: Fujitsu Limited
    Inventors: Yasumoto Tomita, Masaya Kibune, Hirotaka Tamura
  • Patent number: 8031091
    Abstract: A reception circuit includes: an AD converter that outputs digital data in accordance with an input signal; a correction circuit that corrects nonlinearity of the AD converter; and an equalization circuit that equalizes the corrected digital data, wherein the correction circuit includes: a conversion table used to convert digital data output from the AD converter; and a correction amount computation circuit that creates the conversion table from the output data of the AD converter and the output of the equalization circuit. The correction amount computation circuit creates the conversion table so that there is no dependence between the ADC output value of the AD converter and the estimation result by the equalization circuit for the ADC output value.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: October 4, 2011
    Assignee: Fujitsu Limited
    Inventor: Masaya Kibune
  • Publication number: 20110221491
    Abstract: A receiving circuit includes: a clock generating circuit to generate a plurality of clock signals in a cycle; an oversampling circuit to oversample input data based on the plurality of clock signals and output a plurality of samples of digital data in a unit interval; a data boundary determining circuit to detect a changing point of the digital data, determine data boundaries of the unit interval based on the changing point, and output digital data corresponding to a central data between the data boundaries; and a clock phase control circuit to control a phase of at least one of the plurality of clock signals so that a first number of the plurality of samples becomes a certain value when a second number of samples between the data boundaries is larger than a threshold value.
    Type: Application
    Filed: February 9, 2011
    Publication date: September 15, 2011
    Applicant: FUJITSU LIMITED
    Inventors: Takayuki SHIBASAKI, Masaya Kibune, Takuji Yamamoto