Patents by Inventor Kouichi Yamaguchi

Kouichi Yamaguchi 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: 20100327924
    Abstract: A waveform equalization circuit includes: a decision feedback equalization unit that feeds back and equalizes an input signal; a clock phase adjustment unit that adjusts a clock phase of a signal equalized by the decision feedback equalization unit based on a signal determined with a prescribed potential as a threshold; and a duo-binary decoder that encodes, into a duo-binary signal, the signal determined with the prescribed potential as a threshold based on a clock adjusted by the clock phase adjustment unit from the signal equalized by the decision feedback equalization unit; wherein the equalized signal is generated by adding the duo-binary signal encoded by the duo-binary decoder to the input signal. A first post-tap of the input signal is equalized by the clock phase adjustment unit without feedback equalization by the decision feedback equalization unit. Second and subsequent post-taps of the input signal are fed back and equalized by the decision feedback equalization unit.
    Type: Application
    Filed: March 6, 2009
    Publication date: December 30, 2010
    Inventors: Hideyuki Hasegawa, Kazuhisa Sunaga, Kouichi Yamaguchi
  • Patent number: 7839924
    Abstract: A partial response signaling system includes a transmitter circuit configured to equalize input data in response to a control signal and to transmit a partial response signal through a transmission medium; and a receiver circuit configured to recover an output data from the partial response signal and to generate the control signal based on the partial response signal and an expected signal to output the control signal to the transmitter circuit.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: November 23, 2010
    Assignee: NEC Corporation
    Inventor: Kouichi Yamaguchi
  • Publication number: 20100232541
    Abstract: Precoded data transmitted from transmitting apparatus (101) is received by receiving apparatus (102) as duobinary data being ternary data via transmission path (103), and the duobinary data is converted into differential data being binary data by absolute value converter (121) comprising an AND gate and an OR gate.
    Type: Application
    Filed: November 1, 2006
    Publication date: September 16, 2010
    Applicant: NEC CORPORATION
    Inventors: Muneo Fukaishi, Kouichi Yamaguchi, Kazuhisa Sunaga
  • Publication number: 20100150289
    Abstract: A common mode of a waveform of a duobinary transmission signal (IN) is set to 0 and the size of a data eye is set to Veye; and reference potentials Vref_H and Vref_L are set to the following values: Veye/?{square root over (3)}?Vref—H?Veye/?{square root over (2)}??(1) ?Veye/?{square root over (2)}?Vref—L??Veye/?{square root over (3)}??(2) More particularly, effect becomes remarkable by setting the reference potentials Vref_H and Vref_L to central values in ranges shown in Equations (1) and (2), respectively. In the central values, fluctuation (jitter) of transition data becomes the smallest, and a jitter characteristic of a reproducing clock becomes the best. Consequently, a clock reproducing apparatus in which a received clock from duobinary transmission data is reproduced with high accuracy is provide.
    Type: Application
    Filed: September 28, 2006
    Publication date: June 17, 2010
    Applicant: NEC CORPORATION
    Inventors: Kazuhisa Sunaga, Kouichi Yamaguchi, Muneo Fukaishi
  • Publication number: 20100135649
    Abstract: The object of the present invention is to provide an actuator body and a throttle mechanism that are small and have a simple structure. The present invention comprises a polymer actuator 11 that bends and deforms by an electric driving source, an intermediate 12 that transmits the bending force of the polymer actuator, and an elastic body 13 to which the bending force is applied through the intermediate, wherein the dimension of a hole portion that is formed in the elastic body 13 changes when the bending force of the polymer actuator 11 is applied onto the elastic body 13 through the intermediate 12.
    Type: Application
    Filed: March 13, 2008
    Publication date: June 3, 2010
    Applicant: EAMEX CORPORATION
    Inventors: Minoru Nakayama, Noboru Tanaka, Kouichi Yamaguchi
  • Publication number: 20100039156
    Abstract: A clockless transmission system includes display controller 101 and display driver 106. Display controller 101 includes data transmission circuit 102 configured to output general data obtained by multiplexing a clock by coding serialized pixel data for each pixel data during a data communication interval and also to output a predetermined control signal during a blanking interval. Display driver 106 includes clock and data recovery circuit 107 configured to output the pixel data from the general data transferred from the display controller and to increase a loop gain of a feedback loop in clock recovery such that the loop gain is larger than that when the general data is received, according to control data of the control signal, to recover and output a clock, and display driving circuit 109 configured to output a signal for driving a display based on the pixel data and the recovered clock.
    Type: Application
    Filed: February 27, 2008
    Publication date: February 18, 2010
    Inventor: Kouichi Yamaguchi
  • Patent number: 7652098
    Abstract: The present invention relates to a resin composition for GHz-band electronic components, the composition comprising nanoscale carbon tubes and at least one member selected from the group consisting of thermoplastic resins, curable resins, and composite resins of thermoplastic resins and curable resins; wherein the nanoscale carbon tubes are present in an amount of 0.0001 to 0.4 wt. % based on the resin; and an electronic component obtainable from the resin composition, or the like.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: January 26, 2010
    Assignee: Osaka Gas Co., Ltd
    Inventors: Kouichi Yamaguchi, Hidekazu Hayama, Ren-De Sun, Masahiro Yamada, Hitoshi Nishino, Yasunori Yokomichi
  • Publication number: 20090253464
    Abstract: Function distinguishing marks are efficiently displayed which correspond to a plurality of functions assigned to a single operation key, respectively. A mobile phone (1) changes in accordance with the number of functions assigned to a single operation key the number of the function distinguishing marks to be displayed which indicate functions.
    Type: Application
    Filed: June 26, 2007
    Publication date: October 8, 2009
    Inventors: Kouichi Yamaguchi, Takayuki Hayashi
  • Publication number: 20090232248
    Abstract: A data receiving device comprises amplifying circuit 41 that amplifies received duobinary data with a given gain into an output signal, offset canceler 56, 57 that cancel an offset of the output signal from amplifying circuit 41, data determiner 43, 44 that sample the output signal from amplifying circuit 41 based on a first reference voltage and a second reference voltage which is of a lower level than the first reference voltage to determine which one of three levels of the duobinary data the received duobinary data have.
    Type: Application
    Filed: January 22, 2007
    Publication date: September 17, 2009
    Applicant: NEC CORPORATION
    Inventors: Muneo Fukaishi, Kouichi Yamaguchi, Kazuhisa Sunaga
  • Patent number: 7590176
    Abstract: A partial response transmission system in which a data signal is transmitted from a transmission side to a reception side through a transmission medium, includes an equalizing circuit provided in the transmission side or the reception side, and configured to adjust a transfer function for an entire system including the transmission medium to a desired transfer function by delaying input data over a plurality of states in units of a period equal to a transition time of a single bit response by the desired transfer function of a partial response transmission and by weighing and adding data in the plurality of stages; and a deciding circuit provided in the reception side and configured to decide an output data from a signal received through the transmission medium through processing under consideration of the desired transfer function.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: September 15, 2009
    Assignee: NEC Corporation
    Inventor: Kouichi Yamaguchi
  • Patent number: 7545241
    Abstract: A microstrip line element is composed of a first electrode layer (10) as a substrate which is more of a metal, a dielectric layer (20) formed by oxidizing, nitriding or oxiynitriding the first electrode layer (10), a conductor layer (30) formed on the dielectric layer (20) and a second electrode layer (40) formed on the conductor layer (30). The conductor layer (30) is composed of at least conductive nanoparticles (32) and a binder resin (31).
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: June 9, 2009
    Assignee: NEC Corporation
    Inventors: Yoshiaki Wakabayashi, Hirokazu Tohya, Kouichi Yamaguchi, Akiji Higuchi, Kenji Yamada
  • Publication number: 20080296051
    Abstract: A printed circuit board includes a base insulating layer and a wiring. The wiring is composed of a terminal portion on an upper surface side of the base insulating layer, a copper plating layer inside a through hole of the base insulating layer and a wiring pattern on a lower surface side of the base insulating layer. A protective plating layer is provided on the upper surface side of the base insulating layer so as to cover the terminal portion and the copper plating layer inside the through hole. A cover insulating layer is provided on the lower surface side of the base insulating layer so as to cover the wiring pattern.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 4, 2008
    Applicant: NITTO DENKO CORPORATION
    Inventor: Kouichi YAMAGUCHI
  • Publication number: 20080075160
    Abstract: A partial response signaling system includes a transmitter circuit configured to equalize input data in response to a control signal and to transmit a partial response signal through a transmission medium; and a receiver circuit configured to recover an output data from the partial response signal and to generate the control signal based on the partial response signal and an expected signal to output the control signal to the transmitter circuit.
    Type: Application
    Filed: September 16, 2005
    Publication date: March 27, 2008
    Applicant: NEC CORPORATION
    Inventor: Kouichi Yamaguchi
  • Patent number: 7270718
    Abstract: The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element such as Si having an oxidizing reactivity higher than iron, and heating the soft magnetic alloy powder in an atmosphere of a weak oxidizing gas by mixing a weak oxidizing gas in an inert gas, and oxidizing selectively the second element at surface layers of the powder while restraining an oxidation of iron to form thin oxide layers with high electrical resistance.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: September 18, 2007
    Assignee: DENSO Corporation
    Inventors: Yoshiaki Nishijima, Yurio Nomura, Kouichi Yamaguchi, Yuuichi Ishikawa, Hidekazu Hayama
  • Publication number: 20070188275
    Abstract: A microstrip line element is composed of a first electrode layer (10) as a substrate which is more of a metal, a dielectric layer (20) formed by oxidizing, nitriding or oxynitriding the first electrode layer (10), a conductor layer (30) formed on the dielectric layer (20) and a second electrode layer (40) formed on the conductor layer (30). The conductor layer (30) is composed of at least conductive nanoparticles (32) and a binder resin (31).
    Type: Application
    Filed: March 11, 2005
    Publication date: August 16, 2007
    Applicant: NEC CORPORATION
    Inventors: Yoshiaki Wakabayashi, Hirokazu Tohya, Kouichi Yamaguchi, Akiji Higuchi, Kenji Yamada
  • Publication number: 20070129481
    Abstract: The present invention relates to a resin composition for GHz-band electronic components, the composition comprising nanoscale carbon tubes and at least one member selected from the group consisting of thermoplastic resins, curable resins, and composite resins of thermoplastic resins and curable resins; wherein the nanoscale carbon tubes are present in an amount of 0.0001 to 0.4 wt. % based on the resin; and an electronic component obtainable from the resin composition, or the like.
    Type: Application
    Filed: February 2, 2005
    Publication date: June 7, 2007
    Inventors: Kouichi Yamaguchi, Hidekazu Hayama, Ren-De Sun, Masahiro Yamada, Hitoshi Nishino, Yasunori Yokomichi
  • Publication number: 20070030890
    Abstract: A partial response transmission system in which a data signal is transmitted from a transmission side to a reception side through a transmission medium, includes an equalizing circuit provided in the transmission side or the reception side, and configured to adjust a transfer function for an entire system including the transmission medium to a desired transfer function by delaying input data over a plurality of states in units of a period equal to a transition time of a single bit response by the desired transfer function of a partial response transmission and by weighing and adding data in the plurality of stages; and a deciding circuit provided in the reception side and configured to decide an output data from a signal received through the transmission medium through processing under consideration of the desired transfer function.
    Type: Application
    Filed: February 3, 2006
    Publication date: February 8, 2007
    Inventor: Kouichi Yamaguchi
  • Patent number: 7012036
    Abstract: A ZrO2—Al2O3 composite ceramic material having high mechanical strength and toughness as well as excellent wear resistance and hardness is provided. This ceramic material includes a first phase of ZrO2 grains containing 10 to 12 mol % of CeO2 as a stabilizer and having an average grain size of 0.1 ?m to 1 ?m, and a second phase of Al2O3 grains having an average grain size of 0.1 to 0.5 ?m.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: March 14, 2006
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Masahiro Nawa, Kouichi Yamaguchi, Motoyuki Toki
  • Publication number: 20060027950
    Abstract: The invention provides a method for manufacturing a soft magnetic material, wherein an Fe—Si alloy powder is heated in a weakly oxidizing atmosphere to form a SiO2 oxide film on the surface, and the powder is then press-molded and fired in a weakly oxidizing atmosphere to obtain a sintered product. By performing the surface oxidizing step in a weakly oxidizing atmosphere such as water vapor, Si is selectively oxidized to form a thin oxide film with high electrical resistance. Furthermore, by firing the molded product in a weakly oxidizing atmosphere, the sintering can be performed while the oxide film, in which cracks and the like are generated at the press-molding, is repaired.
    Type: Application
    Filed: August 3, 2005
    Publication date: February 9, 2006
    Applicant: Denso Corporation
    Inventors: Masahiro Ishitani, Yoshiaki Nishijima, Yurio Nomura, Kouichi Yamaguchi, Yuichi Ishikawa, Hidekazu Hayama
  • Publication number: 20050133116
    Abstract: The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element such as Si having an oxidizing reactivity higher than iron, and heating the soft magnetic alloy powder in an atmosphere of a weak oxidizing gas by mixing a weak oxidizing gas in an inert gas, and oxidizing selectively the second element at surface layers of the powder while restraining an oxidation of iron to form thin oxide layers with high electrical resistance.
    Type: Application
    Filed: November 19, 2004
    Publication date: June 23, 2005
    Inventors: Yoshiaki Nishijima, Yurio Nomura, Kouichi Yamaguchi, Yuuichi Ishikawa, Hidekazu Hayama