Patents by Inventor Toshitsugu Takekuma

Toshitsugu Takekuma 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: 8106677
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: January 31, 2012
    Assignee: LG Electronics Inc.
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Patent number: 7911224
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: March 22, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Publication number: 20100289522
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Application
    Filed: July 27, 2010
    Publication date: November 18, 2010
    Inventors: Toshitsugu TAKEKUMA, Ryoichi Kurihara
  • Patent number: 7791366
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: September 7, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Publication number: 20090015289
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Application
    Filed: May 7, 2008
    Publication date: January 15, 2009
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Patent number: 7372292
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: May 13, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Patent number: 7015717
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: March 21, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Publication number: 20050088200
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Application
    Filed: November 17, 2004
    Publication date: April 28, 2005
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Patent number: 6768346
    Abstract: A signal transmission system includes a first circuit block having a first output circuit for producing a first signal, a plurality of second circuit blocks each including a first receiving circuit for receiving the first signal, and transmission lines connected between the first circuit block and the second circuit blocks, wherein the first circuit block further includes a second output circuit for producing a second signal, and wherein each of the second circuit blocks further includes a second receiving circuit for receiving the second signal, the first receiving circuit latching the first signal in synchronism with the second signal, removing the unsuccessfulness in the signal transmission and reception due to the propagation delay of signals between circuits.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: July 27, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
  • Publication number: 20030184345
    Abstract: A signal transmission system includes a first circuit block having a first output circuit for producing a first signal, a plurality of second circuit blocks each including a first receiving circuit for receiving the first signal, and transmission lines connected between the first circuit block and the second circuit blocks, wherein the first circuit block further includes a second output circuit for producing a second signal, and wherein each of the second circuit blocks further includes a second receiving circuit for receiving the second signal, the first receiving circuit latching the first signal in synchronism with the second signal, removing the unsuccessfulness in the signal transmission and reception due to the propagation delay of signals between circuits.
    Type: Application
    Filed: March 28, 2003
    Publication date: October 2, 2003
    Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
  • Patent number: 6580295
    Abstract: A signal transmission system includes a first circuit block having a first output circuit for producing a first signal, a plurality of second circuit blocks each including a first receiving circuit for receiving the first signal, and transmission lines connected between the first circuit block and the second circuit blocks, wherein the first circuit block further includes a second output circuit for producing a second signal, and wherein each of the second circuit blocks further includes a second receiving circuit for receiving the second signal, the first receiving circuit latching the first signal in synchronism with the second signal, removing the unsuccessfulness in the signal transmission and reception due to the propagation delay of signals between circuits.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: June 17, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
  • Publication number: 20020175701
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Application
    Filed: July 15, 2002
    Publication date: November 28, 2002
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Patent number: 6441639
    Abstract: A signal transmitting circuit includes one or more circuit blocks having a driving circuit and an intra-block transmission line for transmitting a signal produced by the driving circuit, one or more circuit blocks having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between both of the driving and receiving circuit blocks. Inter-block transmission line is terminated at one or two ends by one or two resistors having substantially the same impedance as the interblock transmission lien itself.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: August 27, 2002
    Assignee: Hitachi, Ltd
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Patent number: 6420900
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: July 16, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Publication number: 20020046094
    Abstract: An advertiser registers advertisement information in a database. An advertisement requester registers advertisement request information in the database. An advertisement information providing server compares the advertisement information with the advertisement request information at predetermined intervals of time to extract the advertisement information coinciding with the advertisement request information, delivers the extracted advertisement information to the advertisement requester or an address of a destination specified by the advertisement requester. Thus, the consumer can easily get a desired advertisement.
    Type: Application
    Filed: February 23, 2001
    Publication date: April 18, 2002
    Inventor: Toshitsugu Takekuma
  • Publication number: 20010035769
    Abstract: A signal transmitting circuit includes a circuit block having a driving circuit and an intra-block transmission line for transmitting a signal from the driving circuit, a circuit block having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between the driving and receiving circuit blocks. The inter-block transmission line is terminated by a resistor having substantially the same impedance as the interblock transmission line. The intra-block transmission lines are provided with a resistance element having a resistance substantially equal to a value derived by subtracting half of an impedance of the inter-block transmission line from an impedance of the intra-block transmission line, to lower signal amplitude and suppress reflections of a signal at branch points along the main interblock transmission line, thereby enabling a high-speed signal transfer.
    Type: Application
    Filed: June 27, 2001
    Publication date: November 1, 2001
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Publication number: 20010005146
    Abstract: A signal transmission system includes a first circuit block having a first output circuit for producing a first signal, a plurality of second circuit blocks each including a first receiving circuit for receiving the first signal, and transmission lines connected between the first circuit block and the second circuit blocks, wherein the first circuit block further includes a second output circuit for producing a second signal, and wherein each of the second circuit blocks further includes a second receiving circuit for receiving the second signal, the first receiving circuit latching the first signal in synchronism with the second signal, removing the unsuccessfulness in the signal transmission and reception due to the propagation delay of signals between circuits.
    Type: Application
    Filed: February 7, 2001
    Publication date: June 28, 2001
    Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
  • Patent number: 6211703
    Abstract: A signal transmission system includes a first circuit block having a first output circuit for producing a first signal, a plurality of second circuit blocks each including a first receiving circuit for receiving the first signal, and transmission lines connected between the first circuit block and the second circuit blocks, wherein the first circuit block further includes a second output circuit for producing a second signal, and wherein each of the second circuit blocks further includes a second receiving circuit for receiving the second signal, the first receiving circuit latching the first signal in synchronism with the second signal, removing the unsuccessfulness in the signal transmission and reception due to the propagation delay of signals between circuits.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: April 3, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
  • Patent number: 6172517
    Abstract: A signal transmitting circuit includes one or more circuit blocks having a driving circuit and an intra-block transmission line for transmitting a signal produced by the driving circuit, one or more circuit blocks having a receiving circuit and an intra-block transmission line for transmitting the signal to said receiving circuit, and a main interblock transmission line for propagating a signal between both of the driving and receiving circuit blocks. Inter-block transmission line is terminated at one or two ends by one or two resistors having substantially the same impedance as the interblock transmission line itself.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: January 9, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
  • Patent number: 6125419
    Abstract: There are provided plural synchronous RAMs, a memory controller, a bus for inputting the signal output from the memory controller 1a to the synchronous RAMs, and a bus for inputting the signals output from the synchronous RAMs to the memory controller. Each of the buses has a main line and two stub lines connected to the trunk like. Each of the synchronous RAMs is connected to the corresponding stub line so that the sum of the bus length of the bus between the synchronous RAM and the memory controller and the bus length of the bus between the synchronous RAM and the memory controller is substantially constant among all of said synchronous RAMs. Therefore, the signal transmission time between the bus master and the plural bus slaves can be shortened without increasing the number of pins of the bus master while keeping the signal transmission time substantially constant among the plural bus slaves.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: September 26, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Masaya Umemura, Hideki Osaka, Toshitsugu Takekuma