Patents by Inventor Yoshiharu Tosaka

Yoshiharu Tosaka 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: 9287857
    Abstract: There is provided a semiconductor device having: a latch circuit having a plurality of data holding nodes; a first capacitance element connected to the first data holding node included in the plurality of data holding nodes; and a first switch element provided between the first data holding node and the first capacitance element.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: March 15, 2016
    Assignee: SOCIONEXT INC.
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Publication number: 20140333363
    Abstract: There is provided a semiconductor device having: a latch circuit having a plurality of data holding nodes; a first capacitance element connected to the first data holding node included in the plurality of data holding nodes; and a first switch element provided between the first data holding node and the first capacitance element.
    Type: Application
    Filed: July 22, 2014
    Publication date: November 13, 2014
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 8816739
    Abstract: There is provided a semiconductor device having: a latch circuit (103, 104) having a plurality of data holding nodes; a first capacitance element (C) connected to the first data holding node (A) included in the plurality of data holding nodes; and a first switch element (SW2) provided between the first data holding node (A) and the first capacitance element (C).
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: August 26, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 8803549
    Abstract: A latch circuit includes a feedback circuit having inverter circuits and at least two input terminals and an input circuit for inputting input signals or signals having the same phase as the input signals to the input terminals of the feedback circuit in synchronization with a clock signal. In the feedback circuit section, only when the input signals or the signals having the same phase as the input signals are input to the at least two input terminals at the same time, positive feedback using a predetermined number of amplification stages is applied to the input terminals.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: August 12, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 8749287
    Abstract: A semiconductor device has a first latch circuit, a second latch circuit configured to receive an output of the first latch circuit, a first switching element provided between the first latch circuit and the second latch circuit, a feedback line for feeding data held by the second latch circuit to the first latch circuit, and a second switching element provided on the feedback line.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: June 10, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 8561006
    Abstract: A CAD device according to the embodiments includes means that determines signal transmission time of each signal transmission circuit in an LSI circuit, means that determines an output inversion rate of a flip-flop circuit included in each signal transmission circuit when the flip-flop circuit is exposed to radiation, means that determines a signal transmission circuit that is a critical path, means that calculates a total soft error rate of the LSI circuit on the basis of the signal transmission time, the output inversion rate, and a clock period, and means that, when a predetermined soft error rate is less than the total soft error rate of the LSI circuit as a result of comparison, reducing the total soft error rate of the LSI circuit to the extent possible without changing signal transmission time of the signal transmission circuit, which is a critical path.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: October 15, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 8441294
    Abstract: A data holding circuit including a first input terminal through which data is inputted; at least one delay element for delaying the data inputted through the first input terminal; and a first element for holding data, wherein, when the data inputted through the first input terminal and the data delayed by the delay element are equal to each other, the first element holds data corresponding to the data inputted through the first input terminal and wherein, when the data inputted through the first input terminal and the data delayed by the delay element are different from each other, the first element continues to hold the data presently held by the first element.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: May 14, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 8421503
    Abstract: A latch circuit includes an input part receiving an external input signal; a plurality of CMOS inverter circuits divided into a first group that includes a first CMOS inverter circuit and a second CMOS inverter circuit outputting inverted data with respect to the input signal, and a second group that includes a third CMOS inverter circuit and a fourth CMOS inverter circuit outputting the same data as the input signal; and a feedback path through which the input signal is fed back to the input part via the plurality of CMOS inverter circuits, wherein a second-polarity drain belonging to one of the first CMOS inverter circuit and the second CMOS inverter circuit is arranged between a first-polarity drain belonging to the first CMOS inverter circuit and a first-polarity drain belonging to the second CMOS inverter circuit.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: April 16, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Publication number: 20120038386
    Abstract: A latch circuit includes a feedback circuit having inverter circuits and at least two input terminals and an input circuit for inputting input signals or signals having the same phase as the input signals to the input terminals of the feedback circuit in synchronization with a clock signal. In the feedback circuit section, only when the input signals or the signals having the same phase as the input signals are input to the at least two input terminals at the same time, positive feedback using a predetermined number of amplification stages is applied to the input terminals.
    Type: Application
    Filed: September 19, 2011
    Publication date: February 16, 2012
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Taiki UEMURA, Yoshiharu Tosaka
  • Patent number: 8072251
    Abstract: A latch circuit includes: four or more gates; three input terminals and one or two output terminals which are connected to at least one of the four or more gates; a feedback circuit in which respective input terminals of the four or more gates are connected to output terminals of at least another two of the four gates; and a data inverting gate which, when all data input into the three input terminals is the same, outputs inverted data of the data from the output terminals, and when all the data input into the three input terminals is not the same, retains previous data.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: December 6, 2011
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 8035410
    Abstract: A latch circuit includes a feedback circuit having inverter circuits and at least two input terminals and an input circuit for inputting input signals or signals having the same phase as the input signals to the input terminals of the feedback circuit in synchronization with a clock signal. In the feedback circuit section, only when the input signals or the signals having the same phase as the input signals are input to the at least two input terminals at the same time, positive feedback using a predetermined number of amplification stages is applied to the input terminals.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: October 11, 2011
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Publication number: 20110148495
    Abstract: A data holding circuit including a first input terminal through which data is inputted; at least one delay element for delaying the data inputted through the first input terminal; and a first element for holding data, wherein, when the data inputted through the first input terminal and the data delayed by the delay element are equal to each other, the first element holds data corresponding to the data inputted through the first input terminal and wherein, when the data inputted through the first input terminal and the data delayed by the delay element are different from each other, the first element continues to hold the data presently held by the first element.
    Type: Application
    Filed: March 1, 2011
    Publication date: June 23, 2011
    Applicant: Fujitsu Microelectronics Limited
    Inventors: Taiki UEMURA, Yoshiharu TOSAKA
  • Publication number: 20110006803
    Abstract: A latch circuit includes a feedback circuit having inverter circuits and at least two input terminals and an input circuit for inputting input signals or signals having the same phase as the input signals to the input terminals of the feedback circuit in synchronization with a clock signal. In the feedback circuit section, only when the input signals or the signals having the same phase as the input signals are input to the at least two input terminals at the same time, positive feedback using a predetermined number of amplification stages is applied to the input terminals.
    Type: Application
    Filed: September 9, 2010
    Publication date: January 13, 2011
    Applicant: FUJITSU MICROELECTRONICS LIMITED
    Inventors: Taiki UEMURA, Yoshiharu TOSAKA
  • Publication number: 20100308881
    Abstract: A semiconductor device has a first latch circuit, a second latch circuit configured to receive an output of the first latch circuit, a first switching element provided between the first latch circuit and the second latch circuit, a feedback line for feeding data held by the second latch circuit to the first latch circuit, and a second switching element provided on the feedback line.
    Type: Application
    Filed: August 2, 2010
    Publication date: December 9, 2010
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Taiki UEMURA, Yoshiharu TOSAKA
  • Patent number: 7812630
    Abstract: A latch circuit includes a feedback circuit having inverter circuits and at least two input terminals and an input circuit for inputting input signals or signals having the same phase as the input signals to the input terminals of the feedback circuit in synchronization with a clock signal. In the feedback circuit section, only when the input signals or the signals having the same phase as the input signals are input to the at least two input terminals at the same time, positive feedback using a predetermined number of amplification stages is applied to the input terminals.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: October 12, 2010
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Publication number: 20100225356
    Abstract: A latch circuit includes an input part receiving an external input signal; a plurality of CMOS inverter circuits divided into a first group that includes a first CMOS inverter circuit and a second CMOS inverter circuit outputting inverted data with respect to the input signal, and a second group that includes a third CMOS inverter circuit and a fourth CMOS inverter circuit outputting the same data as the input signal; and a feedback path through which the input signal is fed back to the input part via the plurality of CMOS inverter circuits, wherein a second-polarity drain belonging to one of the first CMOS inverter circuit and the second CMOS inverter circuit is arranged between a first-polarity drain belonging to the first CMOS inverter circuit and a first-polarity drain belonging to the second CMOS inverter circuit.
    Type: Application
    Filed: March 2, 2010
    Publication date: September 9, 2010
    Applicant: FUJITSU MICROELECTRONICS LIMITED
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Publication number: 20100213998
    Abstract: There is provided a semiconductor device having: a latch circuit (103, 104) having a plurality of data holding nodes; a first capacitance element (C) connected to the first data holding node (A) included in the plurality of data holding nodes; and a first switch element (SW2) provided between the first data holding node (A) and the first capacitance element (C).
    Type: Application
    Filed: April 22, 2010
    Publication date: August 26, 2010
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Patent number: 7719337
    Abstract: A semiconductor device includes a circuit having a first data holding node and a second data holding node; a first MOS field-effect transistor coupled to the first data holding node; a second MOS field-effect transistor coupled to the second data holding node; and a clock generation circuit coupled to a first gate electrode of the first MOS field-effect transistor for outputting a clock signal, wherein the first gate electrode is coupled to the second data holding node via the second MOS field-effect transistor, and a second gate electrode of the second MOS field-effect transistor is coupled to the first data holding node via the first MOS field-effect transistor.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: May 18, 2010
    Assignee: Fujitsu Microelectronics Limited
    Inventors: Taiki Uemura, Yoshiharu Tosaka
  • Publication number: 20090243686
    Abstract: A latch circuit includes: four or more gates; three input terminals and one or two output terminals which are connected to at least one of the four or more gates; a feedback circuit in which respective input terminals of the four or more gates are connected to output terminals of at least another two of the four gates; and a data inverting gate which, when all data input into the three input terminals is the same, outputs inverted data of the data from the output terminals, and when all the data input into the three input terminals is not the same, retains previous data.
    Type: Application
    Filed: February 19, 2009
    Publication date: October 1, 2009
    Applicant: FUJITSU MICROELECTRONICS LIMITED
    Inventors: Taiki UEMURA, Yoshiharu TOSAKA
  • Publication number: 20090140764
    Abstract: A latch circuit includes a feedback circuit having inverter circuits and at least two input terminals and an input circuit for inputting input signals or signals having the same phase as the input signals to the input terminals of the feedback circuit in synchronization with a clock signal. In the feedback circuit section, only when the input signals or the signals having the same phase as the input signals are input to the at least two input terminals at the same time, positive feedback using a predetermined number of amplification stages is applied to the input terminals.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 4, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Taiki UEMURA, Yoshiharu Tosaka