Patents by Inventor Kenichi Yasuda
Kenichi Yasuda 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).
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Patent number: 6803792Abstract: Two input buffer circuits of current mirror type input buffer circuits are combined, and output signals OUT1, OUT2 therefrom are combined to provide output signal OUT via inverter. By inputting complementary clock signals CK, /CK from opposing directions to each other, even complementary clock signals CK, /CK are anti-phase, output signals OUT 1 and OUT 2 are combined in-phase.Type: GrantFiled: January 31, 2003Date of Patent: October 12, 2004Assignee: Renesas Technology Corp.Inventors: Kenichi Yasuda, Hironori Iga
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Publication number: 20040128030Abstract: A robot control apparatus including a motion torque calculating section for calculating a motion torque command which is required for a motion of a servo motor, a disturbance torque estimating section for calculating a disturbance torque, a minute displacement relationship calculating section for calculating a minute displacement relationship between a task coordinate system of a robot and a joint coordinate system of the servo motor, an external force calculating section for carrying out a conversion to an external force on the task coordinate system, a force control section for calculating a position correction amount on the task coordinate system of the robot, and a joint angle correction amount calculating section for carrying out a conversion to a joint angle correction amount on the joint coordinate system.Type: ApplicationFiled: December 12, 2003Publication date: July 1, 2004Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hideo Nagata, Kenichi Yasuda, Yasuyuki Inoue
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Publication number: 20040105334Abstract: In a burn-in test, a sense amplifier circuit is separated from each bit line by a bit line separation switch. In this state, a bit line switch circuit connects one of complementary bit lines to a first voltage node, and connects the other complementary bit line to a second voltage node in blocks on both sides. A first bit line voltage supplied by the first voltage node and a second bit line voltage supplied by the second voltage node can be set independently of each other at least in the burn-in test.Type: ApplicationFiled: May 22, 2003Publication date: June 3, 2004Applicant: RENESAS TECHNOLOGY CORP.Inventor: Kenichi Yasuda
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Publication number: 20040051559Abstract: Two input buffer circuits of current mirror type input buffer circuits are combined, and output signals OUT1, OUT2 therefrom are combined to provide output signal OUT via inverter. By inputting complementary clock signals CK, /CK from opposing directions to each other, even complementary clock signals CK, /CK are anti-phase, output signals OUT 1 and OUT 2 are combined in-phase.Type: ApplicationFiled: January 31, 2003Publication date: March 18, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Kenichi Yasuda, Hironori Iga
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Patent number: 6619111Abstract: A method for monitoring the performance of internal pumps in a plant in which a coolant is driven through plural internal pumps, said method comprising measuring the pump motor power input to the motor driving said pump; estimating the power input to said pump motor during a test performed outside said plant corresponding to the pump speed and the pump flow measured within said plant; computing a pump motor input power ratio based on said measured value and said estimated value; and detecting the variation in the performance of said internal pumps.Type: GrantFiled: August 31, 2001Date of Patent: September 16, 2003Assignee: Hitachi, Ltd.Inventors: Hideo Soneda, Kenichi Yasuda, Kumiaki Moriya
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Publication number: 20030129549Abstract: A direct positive silver halide photographic light-sensitive material is used for forming a light-absorbing layer of a lenticular lens sheet that includes a film-form substrate and a plurality of light input lenses provided on a light input side of the substrate, the light absorbing layer (black stripes) being provided on a light output side of the substrate in a region other than a condensing region of each of the light input lenses, the silver halide photographic light-sensitive material including a support, and at least one light-sensitive layer having light-sensitive silver halide grains with a grain size of 1 &mgr;m or less at a silver coat weight of 1.5 g/m2 or more on one side of the support, wherein on the side of the support opposite the light-sensitive layer there is no light absorbing layer, and by developing after exposing, from the side opposite the light-sensitive layer via the light input lenses, the light absorbing layer is formed based on a silver image.Type: ApplicationFiled: November 14, 2002Publication date: July 10, 2003Inventors: Junji Miyata, Kenichi Yasuda, Yasufumi Morimoto, Kumpei Oda, Masashi Nishiyama
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Patent number: 6581429Abstract: To improve the productivity of the cold rolling facility by providing the cold rolling facility with a strip wiper free of dust and foreign matters suitable for high-speed rolling. The wiping ability was greatly improved by floating and supporting the wiper roll by the static pressure bearing of air of two-pocket type, and by variably adjusting the load range of the floating force in response to the plate width. At high-speed rolling exceeding 700 m/min which was incapable with the conventional roll wiper or tube wiper, the productivity of the cold rolling facility and the surface quality of the strip were greatly improved by applying to the cold rolling facility the wiping device whose wiping ability is equal to or better than the tube wiper at low speeds, and its effect is very large.Type: GrantFiled: June 20, 2001Date of Patent: June 24, 2003Assignee: Hitachi, Ltd.Inventors: Yoshio Takakura, Toshiyuki Kajiwara, Kenichi Yasuda, Yukio Hirama, Minoru Igari, Takashi Norikura, Hidekazu Tabata, Norihito Satou
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Publication number: 20030037727Abstract: A coating apparatus for a plurality of cylindrical light sensitive members each for use in an electrophotography, is provided with a coating tank in which a coating liquid is stored; a dipping device to lift down the plurality of cylindrical base members into the coating liquid and to lift up the plurality of cylindrical base members above the coating liquid so that the plurality of cylindrical base members are coated with the coating liquid; and a plurality of drying hoods corresponding in number to the plurality of cylindrical base members and provided above the coating tank so that each of the plurality of cylindrical base members is lifted up from the coating tank into a respective drying hood among the plurality of cylindrical base members.Type: ApplicationFiled: July 29, 2002Publication date: February 27, 2003Inventors: Kenichi Yasuda, Nobuaki Kobayashi, Tadaaki Sumitani
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Publication number: 20020170349Abstract: A method for monitoring the performance of internal pumps in a plant in which a coolant is driven through plural internal pumps, said method comprising measuring the pump motor power input to the motor driving said pump; estimating the power input to said pump motor during a test performed outside said plant corresponding to the pump speed and the pump flow measured within said plant; computing a pump motor input power ratio based on said measured value and said estimated value; and detecting the variation in the performance of said internal pumps.Type: ApplicationFiled: August 31, 2001Publication date: November 21, 2002Inventors: Hideo Soneda, Kenichi Yasuda, Kumiaki Moriya
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Publication number: 20020162378Abstract: A strip rolling mill includes a pair of upper and lower work rolls for rolling a strip, intermediate rolls for supporting each of the paired work rolls, and back-up rolls for supporting each of the intermediate rolls. Each of the work rolls is provided with a tapered portion at a vicinity to one end thereof in such a way that the tapered portions of the work rolls are on opposite sides of roll bodies thereof with respect to roll axis directions. The rolling method for the strip rolling mill comprises the steps of: when the material with a constant width is being rolled, setting axial positions of the work rolls at appropriate positions and changing axial positions of the intermediate rolls to control a thickness distribution in a width direction of the material being rolled.Type: ApplicationFiled: August 30, 2001Publication date: November 7, 2002Inventors: Hidetoshi Nishi, Hirokazu Nakamae, Kenichi Yasuda, Kenji Horii, Youichi Matsui, Ichirou Maeno, Hideo Kobayashi, Haruyuki Yabe
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Patent number: 6469327Abstract: Pads are alignedly arranged in a central region of a semiconductor chip and are also arranged at an outer peripheral portion of the central portion of the chip. A pad at the outer peripheral portion is electrically connected to a die pad mounting the chip thereon with an insulative material interposed therebetween. A potential supplied to the pad positioned at the outer peripheral portion can be stabilized by parasitic capacitance of the die pad, and a potential of the die pad can be externally monitored easily by removing away a portion of mold resin after resin sealing. Further, due to a cress shaped arrangement of the pads, a voltage down converter can be arranged in line with the pads and at outer periphery of the chip without area penalty. In testing operation, a switching circuit switches a function of a pad to another pad so that cross-shapedly arranged pads are equivalently arranged in a line.Type: GrantFiled: July 25, 1997Date of Patent: October 22, 2002Assignee: Mitsubshi Denki Kabushiki KaishaInventors: Kenichi Yasuda, Hideto Hidaka, Mikio Asakura, Tsukasa Ooishi, Kei Hamade
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Patent number: 6446477Abstract: The invention intends to always maintain a distance between a hydrostatic pressure bearing and a roll even in a transient state before and after the start of rolling, thereby sufficiently and surely preventing damage of those components upon contact with each other, and to prevent a lowering of yield. In a plate rolling mill comprising upper and lower work rolls, and hydrostatic pressure bearings for supporting barrel portions of idler rolls in a non-contact manner with fluid pressure substantially along the horizontal direction, the idler rolls supporting the work rolls substantially along the horizontal direction, gap restraining rolls are provided to prevent gaps between the hydrostatic pressure bearings and the idler rolls from becoming lower than a predetermined value.Type: GrantFiled: April 19, 2001Date of Patent: September 10, 2002Assignee: Hitachi, Ltd.Inventors: Kenichi Yasuda, Mitsuo Nihei, Yukio Hirama, Yoshio Takakura
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Publication number: 20020009004Abstract: A first delay circuit for delaying a data signal IND output from a memory circuit and a second delay circuit for delaying a strobe signal INS, and a latch circuit for latching data according to the outputs of the first and the second delay circuits are provided as a test circuit inside a DDR SDRAM. A tester can observe results of latching by the latch circuit to facilitate determination whether the data signal and the strobe signal have a correlation adapted to a standard. Accordingly, such a DDR SDRAM can be provided that is capable of conducting an examination whether the device meets a tDQSQ standard defining a correlation between the strobe signal DQS and the data signal DQ with ease.Type: ApplicationFiled: January 16, 2001Publication date: January 24, 2002Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Mitsuhiro Hamada, Kenichi Yasuda
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Patent number: 6339555Abstract: A first delay circuit for delaying a data signal IND output from a memory circuit and a second delay circuit for delaying a strobe signal INS, and a latch circuit for latching data according to the outputs of the first and the second delay circuits are provided as a test circuit inside a DDR SDRAM. A tester can observe results of latching by the latch circuit to facilitate determination whether the data signal and the strobe signal have a correlation adapted to a standard. Accordingly, such a DDR SDRAM can be provided that is capable of conducting an examination whether the device meets a tDQSQ standard defining a correlation between the strobe signal DQS and the data signal DQ with ease.Type: GrantFiled: January 16, 2001Date of Patent: January 15, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsuhiro Hamada, Kenichi Yasuda
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Patent number: 6338113Abstract: There are provided a memory controller, a plurality of memory modules, and an external data bus common to the plurality of memory modules. The plurality of memory modules each include a plurality of memory chips, a plurality of internal data buses connected between a corresponding memory chip and an input/output terminal, a logic chip, and a plurality of switch transistors each connected between a corresponding internal data bus and a corresponding input/output terminal to turn on/off in response to a control signal from the logic chip. The plurality of switch transistors in a memory module selected by the memory controller are turned on, and the plurality of switch transistors in the memory modules other than the selected memory module are turned off. Thus, the capacity of the memory modules may be increased while maintaining high-speed data transfer.Type: GrantFiled: November 19, 1998Date of Patent: January 8, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takashi Kubo, Kenichi Yasuda, Hisashi Iwamoto
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Publication number: 20010020380Abstract: The invention intends to always maintain a distance between a hydrostatic pressure bearing and a roll even in a transient state before and after the start of rolling, thereby sufficiently and surely preventing damage of those components upon contact with each other, and to prevent a lowering of yield. In a plate rolling mill comprising upper and lower work rolls, and hydrostatic pressure bearings for supporting barrel portions of idler rolls in a non-contact manner with fluid pressure substantially along the horizontal direction, the idler rolls supporting the work rolls substantially along the horizontal direction, gap restraining rolls are provided to prevent gaps between the hydrostatic pressure bearings and the idler rolls from becoming lower than a predetermined value.Type: ApplicationFiled: April 19, 2001Publication date: September 13, 2001Applicant: Hitachi, Ltd.Inventors: Kenichi Yasuda, Mitsuo Nihei, Yukio Hirama, Yoshio Takakura
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Publication number: 20010018840Abstract: To preferably roll a hard material or an ultra thin material by more reliably supporting small diameter work rolls even under a transient condition such as when starting a rolling operation or when finishing a rolling operation, undriven both ends support rolls 9, 10, 11 and 12 are provided on outer sides of a width along which a maximum sheet width of strip passes on a barrel portion of the work roll 3, to be opposed to each other at an entry side and a delivery side of respective end portions to thereby press and support the work roll. Further, hydrostatic bearings 21 and 23 are installed at central portions of both side barrels of the work roll 3, and fluid such as oil is supplied from fluid pressure supply ports 25 and 26 to the bearing portions to thereby float up the work rolls 3 by forming gaps between the hydrostatic bearings 21 and 23 and the work roll 3 and support the work roll 3 in horizontal direction in noncontact.Type: ApplicationFiled: February 23, 2001Publication date: September 6, 2001Applicant: HITACHI, LTD.Inventors: Mistuo Nihei, Kenichi Yasuda, Yukio Hirama, Minoru Igari
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Patent number: 6268097Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor comprises pigment particles obtained by incorporating one or more metal atom into polycyclic anhydride-aromatic diamine condensation compound particles.Type: GrantFiled: December 20, 1999Date of Patent: July 31, 2001Assignee: Konica CorporationInventors: Hirofumi Hayata, Kazumasa Watanabe, Kenichi Yasuda
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Patent number: 6250126Abstract: The invention intends to always maintain a distance between a hydrostatic pressure bearing and a roll even in a transient state before and after the start of rolling, thereby sufficiently and surely preventing damage of those components upon contact with each other, and to prevent a lowering of yield. In a plate rolling mill comprising upper and lower work rolls, and hydrostatic pressure bearings for supporting barrel portions of idler rolls in a non-contact manner with fluid pressure substantially along the horizontal direction, the idler rolls supporting the work rolls substantially along the horizontal direction, gap restraining rolls are provided to prevent gaps between the hydrostatic pressure bearings and the idler rolls from becoming lower than a predetermined value.Type: GrantFiled: June 1, 1999Date of Patent: June 26, 2001Assignee: Hitachi, Ltd.Inventors: Kenichi Yasuda, Mitsuo Nihei, Yukio Hirama, Yoshio Takakura
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Patent number: 6213381Abstract: A bonding apparatus for bonding metal plates, includes an overlapping mechanism for overlapping end portions of the metal plates, at least two supports for supporting the overlapped portion of the metal plates at one side of the metal plates, and a shearing blade disposed opposite the supports so as to sandwich the overlapped portion of the metal plates therebetween, wherein a moving mechanism is provided for relatively moving at least one of the shearing blade and the supports so as to press the shearing blade into the overlapped portion of the metal plates disposed between the supports and the shearing glade. A method for bonding is characterized by bonding metal plates by using the above apparatus.Type: GrantFiled: December 9, 1998Date of Patent: April 10, 2001Assignee: Hitachi, Ltd.Inventors: Takao Funamoto, Gen Nagakubo, Takashi Mashiko, Fuminori Ishikawa, Tadashi Nishino, Yusutsugu Yoshimura, Toshiyuki Kajiwara, Kenichi Yasuda, Mitsuo Nihei, Yoshio Takakura, Hironori Shimogama