Patents by Inventor Makoto Suwada
Makoto Suwada 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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Publication number: 20130254733Abstract: A design support apparatus acquires position information for a signal wire that is to be disposed in wiring layer stacked on an insulation layer. Subsequently, the design support apparatus acquires position information for an area obtained by projecting, in a direction for glass fiber bundles to be stacked on one another, the glass fiber bundles in an insulation layer actually used. The design support apparatus converts the position information for the signal wire that is to be disposed into position information for a position in the area of the glass fiber bundles such that the signal wire is included in the area of the glass fiber bundles in the insulation layer actually used. The design support apparatus outputs the converted position information.Type: ApplicationFiled: December 23, 2012Publication date: September 26, 2013Applicant: FUJITSU LIMITEDInventor: Makoto SUWADA
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Patent number: 8422567Abstract: According to an aspect of the embodiment, a signal transmission apparatus includes a sine wave output unit that outputs a sine wave to a transmission path, network analyzers and that analyze signals on the transmission path, an S parameter measurement unit that measures S parameters based on the analysis, a selection unit that selects a plurality of combinations of an amplitude, an emphasis characteristic, and an equalization characteristic based on the S parameters, measurement units that measure a BER or an eye opening of the transmission path for the plurality of combinations, and a setting unit that extracts single combination based on the measurement and that sets the amplitude, the emphasis characteristic, and the equalization characteristic to a transmission unit and a reception unit.Type: GrantFiled: January 19, 2010Date of Patent: April 16, 2013Assignee: Fujitsu LimitedInventor: Makoto Suwada
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Patent number: 8331431Abstract: According to an aspect of the embodiment, According to an aspect of the invention, a signal transmission apparatus transmits a first signal to a transmission line. The apparatus measures a reflection characteristic of the transmission line based on a signal resulting from reflection of the first signal, and measures a transmission characteristic of the transmission line based on a signal resulting from transmission of the first signal through the transmission line. The apparatus determines a transmission clock frequency and a multi-value number based on the reflection characteristic and the transmission characteristic, and modulates information using the transmission clock frequency and the multi-value number to transmit a second signal resulting from the modulation to the transmission line. The apparatus receives the second signal through the transmission line and demodulates the received second signal.Type: GrantFiled: July 22, 2009Date of Patent: December 11, 2012Assignee: Fujitsu LimitedInventor: Makoto Suwada
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Patent number: 8331428Abstract: A signal transmission apparatus comprises a first signal transmission section configured to transmit a first signal for performing measurement of characteristics of a transmission line to the transmission line. A reflection characteristic measurement section is configured to measure a reflection characteristic of the transmission line. A pass characteristic measurement section is configured to measure a pass characteristic of the transmission line. A determination section is configured to determine a transmission clock frequency based upon the reflection characteristic. A second signal transmission section is configured to modulate information and to transmit a second signal obtained by the modulation to the transmission line. A second signal receiving section is configured to receive and to demodulate the second signal which has been transmitted by the second signal transmission section and has passed the transmission line.Type: GrantFiled: July 14, 2009Date of Patent: December 11, 2012Assignee: Fujitsu LimitedInventor: Makoto Suwada
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Patent number: 8286343Abstract: A method of manufacturing a wiring substrate includes forming a conducting layer on a first insulating layer including a first glass cloth; forming a photosensitive resist layer on the conducting layer; recognizing a first origin position on the first insulating layer; forming a mask on the resist layer by positioning the mask with respect to the first origin position, the mask being formed so as to position wiring patterns only on positions overlapping the first glass cloth in a planar view; and exposing the resist layer via the mask and forming the wiring patterns only on the positions overlapping the first glass cloth in the planar view.Type: GrantFiled: October 4, 2010Date of Patent: October 16, 2012Assignee: Fujitsu LimitedInventor: Makoto Suwada
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Patent number: 8095351Abstract: A modeling method creates a three-dimensional analysis model of a target object for extracting parameters that are used to analyze a high-frequency transmission, by selecting, from an art work data of the target object, an extraction target region that becomes a target for extracting the parameters that are used to analyze the high-frequency transmission, deleting non-extraction target elements of the extraction target region, that do not affect an electromagnetic analysis and are other than extraction target elements that affect the electromagnetic analysis, linearizing, from among the extraction target elements, a curved wiring, and optimizing a wiring length of the extraction target region including the linearized wiring and optimizing an analyzing space dimension of the extraction target region, so as to create the three-dimensional analysis model.Type: GrantFiled: September 4, 2007Date of Patent: January 10, 2012Assignee: Fujitsu LimitedInventors: Makoto Suwada, Akio Sekino
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Patent number: 8000662Abstract: A transmission characteristic adjustment device and the like that can carry out circuit adjustment before an error occurs, and has a transmission characteristic with high reliability without generating an error are provided. The device determines existence or non-existence of a difference with respect to confirmed data based on each phase of a multiphase clock, detects a window width in a time axis direction of receiving data based on a result of the determination and a phase of the multiphase clock, and evaluates a setting value of a circuit element of the transmission element or the reception element that has an influence on a receiving waveform based on a fluctuation of the detected window width, and changes the setting value of the circuit element of the transmission element or the reception element based on a result of the evaluation.Type: GrantFiled: August 5, 2008Date of Patent: August 16, 2011Assignee: Fujitsu LimitedInventors: Daita Tsubamoto, Makoto Suwada, Hitoshi Yokemura, Masaki Tosaka
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Publication number: 20110078895Abstract: A method of manufacturing a wiring substrate includes forming a conducting layer on a first insulating layer including a first glass cloth; forming a photosensitive resist layer on the conducting layer; recognizing a first origin position on the first insulating layer; forming a mask on the resist layer by positioning the mask with respect to the first origin position, the mask being formed so as to position wiring patterns only on positions overlapping the first glass cloth in a planar view; and exposing the resist layer via the mask and forming the wiring patterns only on the positions overlapping the first glass cloth in the planar view.Type: ApplicationFiled: October 4, 2010Publication date: April 7, 2011Applicant: FUJITSU LIMITEDInventor: Makoto SUWADA
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Publication number: 20100118930Abstract: According to an aspect of the embodiment, a signal transmission apparatus includes a sine wave output unit that outputs a sine wave to a transmission path, network analyzers and that analyze signals on the transmission path, an S parameter measurement unit that measures S parameters based on the analysis, a selection unit that selects a plurality of combinations of an amplitude, an emphasis characteristic, and an equalization characteristic based on the S parameters, measurement units that measure a BER or an eye opening of the transmission path for the plurality of combinations, and a setting unit that extracts single combination based on the measurement and that sets the amplitude, the emphasis characteristic, and the equalization characteristic to a transmission unit and a reception unit.Type: ApplicationFiled: January 19, 2010Publication date: May 13, 2010Applicant: FUJITSU LIMITEDInventor: Makoto Suwada
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Patent number: 7681156Abstract: A circuit simulator includes: a DC analysis section which analyses a static stable potential on a transmission circuit if a capacitor which blocks a DC current while allowing an AC current to pass therethrough is connected in series in the line of the transmission circuit; and an initial potential application section which applies, as an initial potential in the simulation, the stable potential obtained by the DC analysis section to an application position on the upstream side of the capacitor in the flow of the signal through the transmission circuit. The simulator also includes a circuit simulation section which performs the simulation of the transmission circuit under the initial potential applied by the initial potential application section.Type: GrantFiled: September 5, 2006Date of Patent: March 16, 2010Assignee: Fujitsu LimitedInventors: Makoto Suwada, Masaki Tosaka, Megumi Nagata
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Publication number: 20100020858Abstract: According to an aspect of the embodiment, According to an aspect of the invention, a signal transmission apparatus transmits a first signal to a transmission line. The apparatus measures a reflection characteristic of the transmission line based on a signal resulting from reflection of the first signal, and measures a transmission characteristic of the transmission line based on a signal resulting from transmission of the first signal through the transmission line. The apparatus determines a transmission clock frequency and a multi-value number based on the reflection characteristic and the transmission characteristic, and modulates information using the transmission clock frequency and the multi-value number to transmit a second signal resulting from the modulation to the transmission line. The apparatus receives the second signal through the transmission line and demodulates the received second signal.Type: ApplicationFiled: July 22, 2009Publication date: January 28, 2010Applicant: FUJITSU LIMITEDInventor: Makoto Suwada
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Publication number: 20100020859Abstract: A signal transmission apparatus comprises a first signal transmission section configured to transmit a first signal for performing measurement of characteristics of a transmission line to the transmission line. A reflection characteristic measurement section is configured to measure a reflection characteristic of the transmission line. A pass characteristic measurement section is configured to measure a pass characteristic of the transmission line. A determination section is configured to determine a transmission clock frequency based upon the reflection characteristic. A second signal transmission section is configured to modulate information and to transmit a second signal obtained by the modulation to the transmission line. A second signal receiving section is configured to receive and to demodulate the second signal which has been transmitted by the second signal transmission section and has passed the transmission line.Type: ApplicationFiled: July 14, 2009Publication date: January 28, 2010Inventor: Makoto SUWADA
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Publication number: 20090167452Abstract: A transmission characteristic adjustment device and the like that can carry out circuit adjustment before an error occurs, and has a transmission characteristic with high reliability without generating an error are provided. The device determines existence or non-existence of a difference with respect to confirmed data based on each phase of a multiphase clock, detects a window width in a time axis direction of receiving data based on a result of the determination and a phase of the multiphase clock, and evaluates a setting value of a circuit element of the transmission element or the reception element that has an influence on a receiving waveform based on a fluctuation of the detected window width, and changes the setting value of the circuit element of the transmission element or the reception element based on a result of the evaluation.Type: ApplicationFiled: August 5, 2008Publication date: July 2, 2009Applicant: FUJITSU LIMITEDInventors: Daita TSUBAMOTO, Makoto Suwada, Hitoshi Yokemura, Masaki Tosaka
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Publication number: 20090168859Abstract: A transmission characteristic adjustment device with high reliability in a transmission characteristic that can adjust a circuit before an error occurs and does not generate an error is provided. A transmission characteristic adjustment device that adjusts a transmission characteristic between a transmission element and a receiving element interposing a transmission path, includes: a sight test circuit that is provided on the receiving element side and detects an eye pattern aperture; a margin calculation circuit that calculates a margin with respect to a mask included in the detected eye pattern aperture; a circuit element adjustment circuit that evaluates a setting value of a circuit element of the transmission element or the receiving element having influence on a receiving waveform based on fluctuation of the calculated margin, and changes the setting value of the circuit element of the transmission element or the receiving element based on a result of the evaluation.Type: ApplicationFiled: August 8, 2008Publication date: July 2, 2009Applicant: FUJITSU LIMITEDInventors: Daita TSUBAMOTO, Makoto SUWADA, Hitoshi YOKEMURA, Masaki TOSAKA
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Publication number: 20080133185Abstract: A modeling method creates a three-dimensional analysis model of a target object for extracting parameters that are used to analyze a high-frequency transmission, by selecting, from an art work data of the target object, an extraction target region that becomes a target for extracting the parameters that are used to analyze the high-frequency transmission, deleting non-extraction target elements of the extraction target region, that do not affect an electromagnetic analysis and are other than extraction target elements that affect the electromagnetic analysis, linearizing, from among the extraction target element, a curved wiring, and optimizing a wiring length of the extraction target region including the linearized wiring and optimizing an analyzing space dimension of the extraction target region, so as to create the three-dimensional analysis mode.Type: ApplicationFiled: September 4, 2007Publication date: June 5, 2008Applicant: FUJITSU LIMITEDInventors: Makoto Suwada, Akio Sekino
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Publication number: 20080077892Abstract: A circuit unit designing apparatus configured to design a circuit unit in which, on a substrate, a plurality of circuit components are disposed, includes a circuit designing part carrying out circuit design; an initial characteristic calculating part calculating characteristics of the circuit unit from characteristics of the substrate and the respective circuit components, before the circuit design; an after design characteristic calculating part calculating characteristics of the circuit unit based on the circuit design result; a characteristic comparing part comparing the characteristics of the circuit unit obtained by the initial characteristic calculating part and the after design characteristic calculating part from one another; and an advice generating part generating an advice for a designer for a necessary design change based on the comparison result.Type: ApplicationFiled: April 26, 2007Publication date: March 27, 2008Applicant: Fujitsu LimitedInventors: Manabu Yamazaki, Makoto Suwada, Megumi Nagata
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Patent number: 7337087Abstract: A circuit analyzing apparatus for analyzing operation characteristics of a circuit unit in which, on a substrate, circuit devices are arranged, has a part for automatically obtaining a value of a substrate parameter concerning the substrate for an operating frequency, which value depends on the operating frequency; and a part for analyzing operation of the circuit unit based on the value of the substrate parameter for the operating frequency.Type: GrantFiled: October 5, 2006Date of Patent: February 26, 2008Assignee: Fujitsu LimitedInventors: Megumi Nagata, Masaki Tosaka, Makoto Suwada
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Publication number: 20070294048Abstract: A circuit analyzing apparatus for analyzing operation characteristics of a circuit unit in which, on a substrate, circuit devices are arranged, has a part for automatically obtaining a value of a substrate parameter concerning the substrate for an operating frequency, which value depends on the operating frequency; and a part for analyzing operation of the circuit unit based on the value of the substrate parameter for the operating frequency.Type: ApplicationFiled: October 5, 2006Publication date: December 20, 2007Applicant: FUJITSU LIMITEDInventors: Megumi Nagata, Masaki Tosaka, Makoto Suwada
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Patent number: 7280953Abstract: A noise countermeasure determination method includes the step of obtaining an analyzing circuit judgement result by judging acceptability of the analyzing circuit based on a comparison of features of the analyzing circuit and transmission circuit topologies, and outputting an improvement proposal for making the analyzing circuit closer to one of basic types of the transmission circuit topologies depending on the analyzing circuit judgement result.Type: GrantFiled: June 18, 2001Date of Patent: October 9, 2007Assignee: Fujitsu LimitedInventors: Shogo Fujimori, Yasuhiro Yamashita, Ryoji Yamada, Masaki Tosaka, Kazuhiko Tokuda, Jiro Yoneda, Makoto Suwada, Tatsuo Koizumi
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Publication number: 20070198957Abstract: A circuit simulator includes: a DC analysis section which analyses a static stable potential on a transmission circuit if a capacitor which blocks a DC current while allowing an AC current to pass therethrough is connected in series in the line of the transmission circuit; and an initial potential application section which applies, as an initial potential in the simulation, the stable potential obtained by the DC analysis section to an application position on the upstream side of the capacitor in the flow of the signal through the transmission circuit. The simulator also includes a circuit simulation section which performs the simulation of the transmission circuit under the initial potential applied by the initial potential application section.Type: ApplicationFiled: September 5, 2006Publication date: August 23, 2007Applicant: FUJITSU LIMITEDInventors: Makoto Suwada, Masaki Tosaka, Megumi Nagata