Patents by Inventor Hiroshi Hamano
Hiroshi Hamano 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: 5736681Abstract: There are provided conductive bumps arranged at predetermined positions penetrated through an insulating layer during a press integration stage to ensure electrical and thermal conductivities between a wiring pattern and a conductive metal as well as electrical connections between the wiring patterns. More specifically, the sharp tip of the conductive bump is subjected to plastic deformation to form the interconnections between the wiring patterns or between the wiring pattern and the conductive metal. Also provided is a method of manufacturing a printed wiring board. A synthetic resin sheet is sandwiched by the surface on which conductive bumps are formed into a laminate. The laminate is heated until the resin component of the synthetic resin sheet in a plastic state or up to a temperature not lower than the glass transition temperature of that resin. At that time, the conductive bumps are forced against the synthetic resin sheet and are penetrated therethrough.Type: GrantFiled: August 31, 1994Date of Patent: April 7, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Yuichi Yamamoto, Yoshizumi Sato, Tomohisa Motomura, Hiroshi Hamano, Yasushi Arai
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Patent number: 5678760Abstract: A cooling system for an electric automobile is characterized in that a heat source is forcibly cooled with a coolant of non-freeze solution, forcibly recirculated through a pipe.Type: GrantFiled: September 29, 1993Date of Patent: October 21, 1997Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.Inventors: Masanori Muso, Keiji Oda, Osamu Koizumi, Hiroshi Hamano
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Patent number: 5510745Abstract: A high speed electronic circuit has a cascode circuit configuration and is provided with a bias current source (CS.sub.0) between an emitter and a base of a load transistor (Q) in the cascode circuit configuration for compensating a base-emitter voltage (V.sub.BE) of the transistor to eliminate an adverse effect of charging and discharging at a stray capacitor (C) which can be connected between the base and the emitter of the transistor. The high speed electronic circuit can be applied to an; circuit, a level shift circuit, a level shift discrimination circuit, a signal distribution circuit, a signal synthesization circuit and a frequency band control circuit.Type: GrantFiled: December 21, 1993Date of Patent: April 23, 1996Assignee: Fujitsu LimitedInventors: Hiroshi Hamano, Izumi Amemiya, Takuji Yamamoto, Hiroo Kitasagami, Takeshi Ihara
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Patent number: 5506542Abstract: A filter circuit and a filter integrated circuit capable of being used in a high frequency band includes a first resistor R.sub.1 connected between an input signal source and an emitter of a common-base transistor TR.sub.1, a first capacitor C.sub.1 connected between said input signal source and a reference voltage point, a second capacitor C.sub.2 connected between said input signal source and a collector of the common-base transistor TR.sub.1, and a second resistor R.sub.2 connected between the collector of the common-base transistor and the reference voltage point. Thus, a low-pass filter which operates in a high frequency band and suppresses the influence of characteristic parameters over the filter characteristic can be constructed.Type: GrantFiled: November 12, 1993Date of Patent: April 9, 1996Assignee: Fujitsu LimitedInventors: Hiroshi Hamano, Izumi Amemiya, Yoichi Oikawa, Takuji Yamamoto, Takeshi Ihara, Yoshinori Nishizawa
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Patent number: 5304912Abstract: A control apparatus for an induction motor and an electric car propelling motor includes an inverter for supplying a driving current to the induction motor on the basis of a predetermined control signal, a rotational speed sensor for detecting a rotational speed of the induction motor, a V/f control circuit responsive to an input speed command signal for producing a control signal for the inverter, a vector control circuit for producing an inverter control signal on the basis of the speed command signal and the rotational speed signal of the rotational speed sensor, an abnormality detecting circuit for detecting abnormality of the rotational speed sensor.Type: GrantFiled: September 21, 1992Date of Patent: April 19, 1994Assignee: Hitachi, Ltd.Inventors: Kenzo Kajiwara, Hiroshi Hamano, Hirohisa Yamamura, Ryoso Masaki
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Patent number: 5293087Abstract: A filter circuit and a filter integrated circuit capable of being used in a high frequency band comprises a first resistor R.sub.1 connected between an input signal source and an emitter of a common-base transistor TR.sub.1, a first capacitor C.sub.1 connected between said input signal source and a reference voltage point, a second capacitor C.sub.2 connected between said input signal source and a collector of the common-base transistor TR.sub.1, and a second resistor R.sub.2 connected between the collector of the common-base transistor and the reference voltage point. Thus, a low-pass filter which operates in a high frequency band and suppresses the influence of characteristic parameters over the filter characteristic can be constructed.Type: GrantFiled: October 19, 1992Date of Patent: March 8, 1994Assignee: Fujitsu LimitedInventors: Hiroshi Hamano, Izumi Amemiya, Yoichi Oikawa, Takuji Yamamoto, Takeshi Ihara, Yoshinori Nishizawa
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Patent number: 5206986Abstract: An electronic circuit package which includes first and second conductive metal members and a circuit board held between the first and second metal members and having a cutout in which an electronic circuit part is accommodated and a process of producing such electronic circuit package are disclosed. With the electronic circuit package, deterioration of a high speed characteristic of an electronic circuit part accommodated in the package is minimized, and accordingly, when the electronic circuit package is applied to an IC for very high speed optical communications for use with an optical repeater or the like, a very high speed system can be realized. By assembling the components in accordance with a predetermined order, facility in process of production and improvement in reliability of products are attained.Type: GrantFiled: June 23, 1992Date of Patent: May 4, 1993Assignee: Fujitsu LimitedInventors: Yasunari Arai, Hiroshi Hamano, Izumi Amemiya, Takuji Yamamoto, Takeshi Ihara
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Patent number: 5150280Abstract: An electronic circuit package which includes first and second conductive metal members and a circuit board held between the first and second metal members and having a cutout in which an electronic circuit part is accommodated and a process of producing such electronic circuit package are disclosed. With the electronic circuit package, deterioration of a high speed characteristic of an electronic circuit part accommodated in the package is minimized, and accordingly, when the electronic circuit package is applied to an IC for very high speed optical communications for use with an optical repeater or the like, a very high speed system can be realized. By assembling the components in accordance with a predetermined order, facility in process of production and improvement in reliability of products are attained.Type: GrantFiled: August 8, 1990Date of Patent: September 22, 1992Assignee: Fujitsu LimitedInventors: Yasunari Arai, Hiroshi Hamano, Izumi Amemiya, Takuji Yamamoto, Takeshi Ihara
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Patent number: 5150288Abstract: A production management system for controlling a production line such as an automobile assembling line includes a plurality of slave computers for controlling assembling robots in assembling stations, and a host computer for supervising common information required by the slave computers. When the common information is to be modified due to a change in the robots, the common iinformation stored in the host computer is modified into corrected common information, and the corrected common information is transmitted from the host computer to the slave computers. The common information stored in the slave computers can therefore be modified by the corrected common information.Type: GrantFiled: December 15, 1989Date of Patent: September 22, 1992Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Shinji Imai, Hiroshi Hamano, Michio Fujinuma, Chikafumi Shimanaka, Shinzo Urushidani
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Patent number: 5113151Abstract: Disclosed is an equalizing and amplifying circuit in an optical signal receiving apparatus comprising a preamplifier circuit having an input terminal connected to the output of a light receiving element. The preamplifier circuit amplifies the electrical signal from the light receiving element and outputs an amplified signal. An automatic gain control circuit is connected to the output of the preamplifier circuit. The preamplifier circuit comprises a transistor having a common-base, a current source connected to the emitter of the transistor for supplying a bias current to the transistor, and a load resistor connected to the collector of the transistor. The emitter of the transistor is connected to the input terminal, and the collector of the transistor is connected to the output terminal. A negative influence caused by mounting the circuit on a package is avoided and the circuit operates stably in a high frequency range.Type: GrantFiled: July 19, 1990Date of Patent: May 12, 1992Assignee: Fujitsu LimitedInventors: Takuji Yamamoto, Hiroshi Hamano, Izumi Amemiya, Yasunari Arai, Takeshi Ihara
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Patent number: 5095706Abstract: A start-up method of a steam turbine plant including a condenser is disclosed. The condenser includes a tube bundle composed of a number of pipes for condensing an exhaust steam from a steam turbine and a hot well for receiving and storing a condensate therein. The interior of the condenser is airtightly divided into two spaces with a partition therebetween, one of them being an upper space containing the tube bundle and the other one being a lower space containing the hot well. A communication passageway(s) extends between the upper space and the lower space with an isolation valve in the form of a butterfly valve disposed on the communication passageway. At the shut-down of the steam turbine plant, the isolation valve is closed to isolate the upper space from the lower space while the lower space is maintained in vacuum.Type: GrantFiled: March 21, 1991Date of Patent: March 17, 1992Assignee: Kabushiki Kaisha ToshibaInventors: Kohei Saito, Hiroki Yamagishi, Toshiki Furukawa, Toshio Sato, Hiroshi Hamano, Yoshio Nakano, Katsuaki Tanaka, Satoru Sakamoto
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Patent number: 5088045Abstract: A production management system controls a production line having a plurality of assembling/machining stations including pieces of production equipment such as nut runners. The production management system includes a computer for supplying control information to control the pieces of production equipment, a first information network for transmitting the control information from the computer to the assembling/machining stations, and a second information network for transmitting information indicating results of operation in the assembling/machining stations to downstream assembling/machining stations to allow defective portions of workpieces to be repaired in the subsequent assembling/machining stations. The first information network comprises a plurality of separate networks associated respectively with divided portions of the production line.Type: GrantFiled: January 2, 1990Date of Patent: February 11, 1992Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Chikafumi Shimanaka, Shinzo Urushidani, Michio Fujinuma, Hiroshi Hamano, Shinji Imai
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Patent number: 5074631Abstract: A Mach-Zehnder interferometer type modulator, constructed of first and second optical waveguides, first and second electrodes cooperating with the same, and a driving voltage source, wherein a driving voltage source is constructed of first and second driving units which drive independently the first and second electrodes in accordance with a data input and wherein the first and second driving units apply first and second driving voltages, individually determined, to the first and second electrodes.Type: GrantFiled: March 13, 1990Date of Patent: December 24, 1991Assignee: Fujitsu LimitedInventors: Hiroshi Hamano, Izumi Amemiya, Hiroshi Nishimoto, Takefumi Namiki, Izumi Yokota, Tadashi Okiyama, Minoru Seino
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Patent number: 5066877Abstract: A data delay circuit includes a first transistor, and a second transistor having a base, an emitter and a collector. Input data is applied to the bases of the first and second transistors. A constant-current source is coupled between the emitters of the first and second transistors and a negative power source. A capacitor is connected between the collector of the first transistor and the collector of the second transistor. The data delay circuit further includes a third transistor and a fourth transistor. The emitters of the third and fourth transistors are connected to the collectors of the first and second transistors, respectively. The bases of the third and fourth transistors are provided with control data having a polarity opposite to that of the input data and having an adjusted amplitude level corresponding to a desired delay time to be given the input data. First and second load resistors are respectively coupled to the collectors of the third and fourth transistors through a positive power source.Type: GrantFiled: February 28, 1991Date of Patent: November 19, 1991Assignee: Fujitsu LimitedInventors: Hiroshi Hamano, Izumi Amemiya, Takuji Yamamoto, Yasunari Arai, Takeshi Ihara