Patents by Inventor Izumi Fukasaku
Izumi Fukasaku 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: 9299481Abstract: A differential signal cable is composed of two inner conductors, an insulator, which covers the two inner conductors separately or together, and an outer conductor, which covers a circumference of the insulator. When measured in a cable length of 1 m, an effective capacitance difference ?X represented by Formula (1) below is not greater than 0.2 percent of an average value C of capacitances of the two inner conductors, ?X=?C+?L/Z02??(1), where ?C is a difference in capacitance between the two inner conductors, ?L is a difference in inductance between the two inner conductors, and Z0 is a reference impedance (50 ohms).Type: GrantFiled: October 9, 2014Date of Patent: March 29, 2016Assignee: HITACHI METALS, LTD.Inventors: Hiroshi Ishikawa, Takahiro Sugiyama, Izumi Fukasaku, Hidenori Yonezawa, Masafumi Kaga
-
Publication number: 20160006181Abstract: An active cable that is capable of reducing crosstalk is provided. A ground pattern is formed so as to sandwich one or both of a part of a transmission side transmission channel located at a side closer to the other side than a compensation circuit and a part of a reception side transmission channel located at a side closer to the other side than the compensation circuit.Type: ApplicationFiled: June 10, 2015Publication date: January 7, 2016Inventors: Kei Nishimura, Izumi Fukasaku, Takahiro Sugiyama
-
Publication number: 20150359082Abstract: A cable with connectors includes a differential transmission path disposed in a paddle card and configured to allow transmission of differential signals between a device and differential signal transmission cables; a chip component mounted on the differential transmission path; and a plurality of foot pads disposed on the differential transmission path to allow mounting of the chip component, the foot pads being greater in width than traces forming the differential transmission path. The differential transmission path has a high-impedance portion at a connection thereof to the foot pads. The high-impedance portion has a differential impedance higher than that of the differential transmission path excluding the high-impedance portion.Type: ApplicationFiled: May 29, 2015Publication date: December 10, 2015Inventors: Kei NISHIMURA, Izumi Fukasaku, Takahiro Sugiyama
-
Patent number: 9117572Abstract: A foamed axial cable includes a pair of signal conductors, an insulation covering a periphery of the signal conductor and formed of a foamed material, a skin layer covering a periphery of the insulation and formed of a non-foamed material, and a shield conductor on a periphery of the skin layer. An outer surface of the skin layer or an inner surface of the shield conductor includes a fine groove formed thereon so as to have a void between the skin layer and the shield conductor.Type: GrantFiled: September 13, 2013Date of Patent: August 25, 2015Assignee: Hitachi Metals, LTD.Inventor: Izumi Fukasaku
-
Publication number: 20150200502Abstract: A cable with connector includes differential signal transmission cables, a connector at both ends of the cables, a paddle card to electrically connect the differential signal transmission cables to a connected device, sending-side electrodes and receiving-side electrodes that are formed on each of front and rear surfaces of the paddle card at one end portion thereof and are electrically connected to the device, sending-side cable connection electrodes, and receiving-side cable connection electrodes. The sending-side cable connection electrodes are formed on the front surface of the paddle card and the receiving-side cable connection electrodes are formed on the rear surface of the paddle card.Type: ApplicationFiled: November 20, 2014Publication date: July 16, 2015Inventors: Kei NISHIMURA, Izumi FUKASAKU, Takahiro SUGIYAMA
-
Publication number: 20150194719Abstract: A cable with connector includes a cable including at least two or more differential signal transmission cables for transmitting/receiving differential signals, a connector at both ends of the cable and including a built-in paddle card to electrically connect the differential signal transmission cables to a connected device. The paddle card includes a sending-side transmission path that is formed on the paddle card so as to transmit electrical signals input from the device to the differential signal transmission cables. The sending-side transmission path includes a common-mode reflecting transmission path that is in a common-mode impedance mismatched to a transmission path of the device so as to reflect common-mode signals input from the transmission path of the device.Type: ApplicationFiled: November 12, 2014Publication date: July 9, 2015Inventors: Kei NISHIMURA, Izumi FUKASAKU, Takahiro SUGIYAMA
-
Publication number: 20150162113Abstract: A differential signal cable is composed of two inner conductors, an insulator, which covers the two inner conductors separately or together, and an outer conductor, which covers a circumference of the insulator. When measured in a cable length of 1 m, an effective capacitance difference ?X represented by Formula (1) below is not greater than 0.2 percent of an average value C of capacitances of the two inner conductors, ?X=?C+?L/Z02??(1), where ?C is a difference in capacitance between the two inner conductors, ?L is a difference in inductance between the two inner conductors, and Z0 is a reference impedance (50 ohms).Type: ApplicationFiled: October 9, 2014Publication date: June 11, 2015Inventors: Hiroshi Ishikawa, Takahiro Sugiyama, Izumi Fukasaku, Hidenori Yonezawa, Masafumi Kaga
-
Publication number: 20150053453Abstract: In a differential signal transmission cable, a surface of a skin layer is partially provided with shield conductors disposed at respective equidistant portions spaced apart in a direction orthogonal to a direction in which two signal conductors are arranged, the equidistant portions each being distant by the same distance from axial centers of the signal conductors. On the surface of the skin layer, the shield conductors are not provided in areas located in the direction in which the signal conductors are arranged, and spaces are created in these areas.Type: ApplicationFiled: August 13, 2014Publication date: February 26, 2015Inventors: Hidenori Yonezawa, Takahiro Sugiyama, Hideki Nonen, Izumi Fukasaku
-
Patent number: 8787764Abstract: To provide a photoelectric composite wiring component combining both characteristics of low power consumption of transmission over electrical wiring and large transmission capacity of optical transmission over optical wiring, and exhibiting a high power efficiency for the transmission capacity. A mechanism for switching between transmission of a transmission signal over an electrical transmission path and that over an optical transmission path depending on the modulation rate or the transmission rate of the transmission signal is provided. When the modulation rate or the transmission rate of the transmission signal is low, power supply to an optical transmitting/receiving section is stopped and the signal is transmitted over the electrical transmission path, thus achieving low power consumption. When the modulation rate or the transmission rate of the transmission signal is high, the signal is transmitted over the optical transmission path, thus achieving a large transmission capacity.Type: GrantFiled: September 20, 2007Date of Patent: July 22, 2014Assignee: Hitachi Metals, Ltd.Inventors: Izumi Fukasaku, Koki Hirano, Masahiko Kobayashi, Akihiro Hiruta
-
Publication number: 20140076608Abstract: A foamed axial cable includes a pair of signal conductors, an insulation covering a periphery of the signal conductor and formed of a foamed material, a skin layer covering a periphery of the insulation and formed of a non-foamed material, and a shield conductor on a periphery of the skin layer. An outer surface of the skin layer or an inner surface of the shield conductor includes a fine groove formed thereon so as to have a void between the skin layer and the shield conductor.Type: ApplicationFiled: September 13, 2013Publication date: March 20, 2014Applicant: Hitachi Metals, Ltd.Inventor: Izumi FUKASAKU
-
Publication number: 20100067915Abstract: To provide a photoelectric composite wiring component combining both characteristics of low power consumption of transmission over electrical wiring and large transmission capacity of optical transmission over optical wiring, and exhibiting a high power efficiency for the transmission capacity. A mechanism for switching between transmission of a transmission signal over an electrical transmission path and that over an optical transmission path depending on the modulation rate or the transmission rate of the transmission signal is provided. When the modulation rate or the transmission rate of the transmission signal is low, power supply to an optical transmitting/receiving section is stopped and the signal is transmitted over the electrical transmission path, thus achieving low power consumption. When the modulation rate or the transmission rate of the transmission signal is high, the signal is transmitted over the optical transmission path, thus achieving a large transmission capacity.Type: ApplicationFiled: September 20, 2007Publication date: March 18, 2010Inventors: Izumi Fukasaku, Koki Hirano, Masahiro Kobayashi, Akihiro Hiruta
-
Patent number: 7512164Abstract: A laser driver IC has an RS flip-flop for latching a signal that indicates an event of fault detection, to output it as an internal fault signal, and a fault signal processing section for generating a disable signal for inactivating the driving function of the laser driver IC in response to output of the RS flip-flop. One of outputs of the fault signal processing section is connected to a fault signal output terminal linked to outside the laser driver IC.Type: GrantFiled: June 14, 2005Date of Patent: March 31, 2009Assignee: Hitachi Cable, Ltd.Inventors: Kenji Mizobuchi, Izumi Fukasaku
-
Publication number: 20080124089Abstract: An optical transceiver comprising a metal case, and an insulating film at least partially covering a case projecting from a host device when the optical transceiver is set in the host device. A method for coating the optical transceiver to be set in the host device comprises steps for sticking a tape to the receptacle portion with a silicone film of the case projecting from the host device when the optical transceiver is set in the host device, for stripping the tape after masking the part other than the receptacle portion, and for immersing the case entirely in a cation electrodeposition paint tank to form an insulating film composed of a cation electrodeposition coating film at the receptacle portion.Type: ApplicationFiled: October 12, 2005Publication date: May 29, 2008Inventors: Yoshiaki Ishigami, Yoshinori Sunaga, Izumi Fukasaku
-
Patent number: 7322840Abstract: A package with a locking mechanism has: a package main body insertable into a cage formed in a host instrument; a package head integrated with the package main body; a latch member provided with the package main body, the latch member restricting detachment of the package main body from the cage when it is inserted into a hole formed in a wall of the cage and it is at a contact plane thereof in contact with a front edge of the hole while protruding from a predetermined face of the package main body; and a revolving shaft disposed perpendicular to a direction in which the package main body is inserted into and detached from the cage, the latch member being pivoted on the revolving shaft. The revolving shaft is disposed near the contact plane of the latch member.Type: GrantFiled: August 1, 2005Date of Patent: January 29, 2008Assignee: Hitachi Cable, Ltd.Inventors: Yoshinori Sunaga, Yoshiaki Ishigami, Izumi Fukasaku
-
Publication number: 20060068628Abstract: A package with a locking mechanism has: a package main body insertable into a cage formed in a host instrument; a package head integrated with the package main body; a latch member provided with the package main body, the latch member restricting detachment of the package main body from the cage when it is inserted into a hole formed in a wall of the cage and it is at a contact plane thereof in contact with a front edge of the hole while protruding from a predetermined face of the package main body; and a revolving shaft disposed perpendicular to a direction in which the package main body is inserted into and detached from the cage, the latch member being pivoted on the revolving shaft. The revolving shaft is disposed near the contact plane of the latch member.Type: ApplicationFiled: August 1, 2005Publication date: March 30, 2006Applicant: Hitachi Cable, Ltd.Inventors: Yoshinori Sunaga, Yoshiaki Ishigami, Izumi Fukasaku
-
Publication number: 20050276609Abstract: A laser driver IC has an RS flip-flop for latching a signal that indicates an event of fault detection, to output it as an internal fault signal, and a fault signal processing section for generating a disable signal for inactivating the driving function of the laser driver IC in response to output of the RS flip-flop. One of outputs of the fault signal processing section is connected to a fault signal output terminal linked to outside the laser driver IC.Type: ApplicationFiled: June 14, 2005Publication date: December 15, 2005Applicant: Hitachi Cable, Ltd.Inventors: Kenji Mizobuchi, Izumi Fukasaku