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).
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Patent number: 8106677Abstract: 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: GrantFiled: July 27, 2010Date of Patent: January 31, 2012Assignee: LG Electronics Inc.Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Patent number: 7911224Abstract: 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: GrantFiled: May 7, 2008Date of Patent: March 22, 2011Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Publication number: 20100289522Abstract: 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: ApplicationFiled: July 27, 2010Publication date: November 18, 2010Inventors: Toshitsugu TAKEKUMA, Ryoichi Kurihara
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Patent number: 7791366Abstract: 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: GrantFiled: May 7, 2008Date of Patent: September 7, 2010Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Publication number: 20090015289Abstract: 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: ApplicationFiled: May 7, 2008Publication date: January 15, 2009Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Patent number: 7372292Abstract: 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: GrantFiled: July 15, 2002Date of Patent: May 13, 2008Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Patent number: 7015717Abstract: 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: GrantFiled: November 17, 2004Date of Patent: March 21, 2006Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Publication number: 20050088200Abstract: 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: ApplicationFiled: November 17, 2004Publication date: April 28, 2005Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Patent number: 6768346Abstract: 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: GrantFiled: March 28, 2003Date of Patent: July 27, 2004Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
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Publication number: 20030184345Abstract: 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: ApplicationFiled: March 28, 2003Publication date: October 2, 2003Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
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Patent number: 6580295Abstract: 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: GrantFiled: February 7, 2001Date of Patent: June 17, 2003Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
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Publication number: 20020175701Abstract: 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: ApplicationFiled: July 15, 2002Publication date: November 28, 2002Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Patent number: 6441639Abstract: 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: GrantFiled: November 21, 2000Date of Patent: August 27, 2002Assignee: Hitachi, LtdInventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Patent number: 6420900Abstract: 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: GrantFiled: June 27, 2001Date of Patent: July 16, 2002Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Publication number: 20020046094Abstract: 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: ApplicationFiled: February 23, 2001Publication date: April 18, 2002Inventor: Toshitsugu Takekuma
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Publication number: 20010035769Abstract: 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: ApplicationFiled: June 27, 2001Publication date: November 1, 2001Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Publication number: 20010005146Abstract: 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: ApplicationFiled: February 7, 2001Publication date: June 28, 2001Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
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Patent number: 6211703Abstract: 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: GrantFiled: June 5, 1997Date of Patent: April 3, 2001Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Akira Yamagiwa, Takashi Moriyama, Ryoichi Kurihara
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Patent number: 6172517Abstract: 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: GrantFiled: May 26, 1998Date of Patent: January 9, 2001Assignee: Hitachi, Ltd.Inventors: Toshitsugu Takekuma, Ryoichi Kurihara, Akira Yamagiwa
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Patent number: 6125419Abstract: 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: GrantFiled: June 13, 1997Date of Patent: September 26, 2000Assignee: Hitachi, Ltd.Inventors: Masaya Umemura, Hideki Osaka, Toshitsugu Takekuma