Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Shionogi Company Limited

Skyworks Filter Solutions Japan Co., Ltd.

Toru Yamada

Toshio Ishizaki

Hideaki Nakakubo

Shoichi Kitazawa

Kazuhide Uriu

Hiroyuki Nakamura

Kazunori Nishimura

Hiroshi Kagata

Hiroshi Kushitani

Tomoya Maekawa

Tetsuyoshi Ogura

Takehiko Yamakawa

Tatsuya Inoue

Naoki Yuda

Shigeru Tsuzuki

Makoto Fujikawa

Tsutomu Matsumura

Toshiaki Nakamura

Emiko Kawahara

Masaharu Tanaka

Minoru Tachibana

Tomoyuki Iwasaki

Yoshitaka Nagatomi

Hiroshi Shigemura

Yasuteru Asakawa

Narihiro Mita

Hiroyuki Nakamatsu

Keiji Onishi

Hiroaki Kosugi

Tomoyuki Ogawa

Hiroyuki Kai

Osamu Kawasaki

Koji Masuda

Hideki Iwaki

Makoto Sakakura

Naoki Komatsu

Akira Minegishi

Masahiro Yamaoka

Kozo Murakami

Naotake Kobayashi

Ken Matsunami

Eiichi Kojima

Tsutomu Igaki

Hideyuki Miyake

Shuichi Sugiyama

Yutaka Kumano

Koji Hashimoto

Kaoru Ishida

Koichi Ogawa

Kazuo Eda

Yasuhiro Sugaya

Yutaka Taguchi

Akira Enokihara

Akihiko Namba

Susumu Sawada

Shun-ichi Seki

Kouji Kawakita

Tomoki Uwano

Yoshihiro Nakagawa

Yukihiko Ise

Shunichi Seki

Akio Tsunekawa

Masaki Kita

Hideki Hayama

Shinobu Nakaya

Ikuo Awai

Yukihiro Takeda

Kenji Monma

Tadanori Fujisawa

Provided are a novel compound having an antagonistic activity for the P2Xreceptor, and a pharmaceutical composition having an antagonistic activity for the P2Xreceptor. A compound represented by Formula (I): wherein Zis C(R) or the like; Ris a hydrogen atom or the like; Zis C(R)(R) or the like; the dashed line represents the presence or absence of a bond; when the dashed line represents the presence of a bond, then Ris absent; Rand Rare each independently a hydrogen atom or the like; Ring Q is a substituted or unsubstituted 5-membered non-aromatic heterocycle or the like; Yis O or the like; Ris a group represented by the formula: &#x2014;(C(R)(R))&#x2014;R; Ris a hydrogen atom or the like; Rand Ris each independently a hydrogen atom or the like; Ris substituted or unsubstituted aromatic carbocyclyl or the like; X is N(R) or the like; Ris a hydrogen atom or the like; Ris substituted or unsubstituted aromatic carbocyclyl or the like; n is an integer from 0 to 4; and m is an integer from 0 to 4, or a pharmaceutically acceptable salt thereof.

Bicyclic nitrogen-containing heterocyclic derivatives and pharmaceutical composition comprising the same

Provided are a novel compound having an antagonistic activity for the P2Xreceptor, and a pharmaceutical composition having an antagonistic activity for the P2Xreceptor. The compound represented by Formula (I): wherein the symbols are defined in the specification, or a pharmaceutically acceptable salt thereof.

In a noise reduction circuit, a transistor circuit amplifies an input signal and outputs an output signal with supply of power from the DC voltage source via a power supply line circuit. The canceling signal adding circuit acquires and attenuates a part of the output signal, to generate a canceling signal having a phase substantially opposite to a phase of a leakage signal leaking to the power supply line circuit, and having an amplitude substantially the same as an amplitude of the leakage signal.

Noise reduction circuit for canceling leakage signal

In an interposer substrate, a plating stub conductor and a ground conductor form a capacitor, and a plating stub conductor and the ground conductor form a capacitor. Capacitances of the capacitors are adjusted so that a phase difference between signals transmitted by a differential transmission using a signal line including a connection wiring conductor and a signal line including a connection wiring conductor is equal to 180 degrees.

Interposer substrate including capacitor for adjusting phase of signal transmitted in same interposer substrate

A circuit board analyzer includes a storage unit for storing mesh position information on an analyzed mesh-division model and extracted circuit constants in relation to each other; a division-model configuration unit for dividing the layout of a circuit board into meshes to configure a new mesh-division model; an identical-mesh determination unit for making a comparison between mesh position information on the new mesh-division model and mesh position information on the analyzed mesh-division model to determine identical meshes that have identical mesh position information; and a circuit-constant extraction unit for performing analytical processing based on the new mesh-division model to extract new circuit constants and reusing, as a new circuit constant associated with the identical meshes, an extracted circuit constant that is related to the mesh position information on the identical meshes.

Circuit board analyzer and analysis method

A circuit board analyzing method and a circuit board analyzer are provided which can greatly reduce analyzing time. The circuit board analyzer includes a computing unit, a memory unitconnected to the computing unit, and an input unitconnected to the computing unit. The computing unitincludes a wiring data acquiring sectionacquiring data of wirings formed on a circuit board, a basic circuit diagram forming sectiondividing the wirings into meshes and setting cells and branches connecting the adjacent cells, and an interference analysis setting sectionsetting an element ignoring range of elements set in the cells and the branches.

Analyzing device for circuit device, circuit device analyzing method, analyzing program, and electronic medium

In a differential transmission line, a substrate has first and second surfaces parallel to each other, and a first grounding conductor is formed on the second surface of the substrate. A dielectric layer is formed on the first grounding conductor, and a second grounding conductor is formed on the dielectric layer. First and the second signal conductors are formed to be parallel to each other on the first surface of the substrate. The first signal conductor and the first and second grounding conductors constitute a first transmission line, and the second signal conductor and the first and second grounding conductors constitute a second transmission line. A slot is formed in the first grounding conductor to three-dimensionally intersect with the first and second signal conductors and to be orthogonal to a longitudinal direction thereof, and a connecting conductor is formed for connecting the first grounding conductor with the second grounding conductor.

Parallel differential transmission lines having an opposing grounding conductor separated into two parts by a slot therein

For example, in a conventional high frequency switch used for a mobile phone and so on, high frequency distortion is caused by a diode which is turned off upon transmission. A high frequency switch includes a switch circuit for switching transmission and reception performed via a transmitting terminal and receiving terminals, said switch circuit having a diode turned off upon transmission, and a low-pass filter for suppressing high frequency distortion caused by the diode upon transmission.

High frequency switch, radio communication apparatus, and high frequency switching method

An interference analysis device that analyzes interference includes an input unit that inputs design data, a selection unit that selects an analysis region, a division unit that divides a wire into segments, a calculation unit that calculates a circuit matrix regarding a coupled line, and an analysis unit that obtains a degree of electromagnetic interference, wherein the calculation unit calculates a circuit matrix of the coupled line, using a parameter set obtained by adding an asymmetry parameter to RLGC parameters of a transmission line in the coupled line. Thus, a method for analyzing an interference of circuit wiring can be provided, which is capable of shortening a processing time substantially while maintaining high precision.

Circuit wiring interference analysis device, interference analysis program, database used in interference analysis device, and asymmetrically connected line model

A method for measuring electric circuit parameters of a 2-terminal circuit having first and second terminals, includes steps of: terminating one of the first and second terminals with a terminal impedance Z, to measure reflection characteristics &#x3b1;for the other terminal; terminating one of the first and second terminals with a terminal impedance Zdifferent from the terminal impedance Z, to measure reflection characteristics &#x3b1;for the other terminal; terminating one of the first and second terminals with a terminal impedance Zdifferent from the terminal impedances Zand Z, to measure reflection characteristics &#x3b1;for the other terminal; and calculating electric circuit parameters of the 2-terminal circuit based on the resultant reflection characteristics &#x3b1;and &#x3b1;, whereby measuring electric circuit parameters, such as S-parameters, Z-parameters or the like, even of a DUT having a weak ground, in a simple way with high accuracy and low cost.

Method and apparatus for measuring electric circuit parameters

A design support system for circuit board includes: a noise source extracting unit for extracting a source of unwanted radiation noise which is generated from a circuit board mounted on an electronic equipment; a noise characteristics input unit for inputting noise characteristics of the unwanted radiation noise which is emitted by the extracted noise source; a noise attenuation ratio input unit for inputting an attenuation ratio of the unwanted radiation noise which is emitted by the noise source and propagated to a feed point of an antenna; a correlation value calculation unit for calculating a correlation value between the noise characteristics and the attenuation ratio of the unwanted radiation noise; and a comparator unit for comparing the calculated correlation value with a predetermined allowable value, whereby avoiding malfunction of an electronic equipment due to interference of unwanted radiation noises generated from the particular electronic equipment into the circuit board via the antenna.

Design support system and design method for circuit board, and noise analysis program

A design support apparatus of the present invention includes the following: an antenna electromagnetic field distribution input portion that inputs data indicating an antenna electromagnetic field distribution in the vicinity of electronic equipment; a board near electromagnetic field distribution input portion that inputs data indicating a board near electromagnetic field distribution as unwanted radiation noise radiated from a board of the electronic equipment; and a correlation value generator that generates a distribution of correlation values showing a correlation between the antenna electromagnetic field and the board near electromagnetic field based on the antenna electromagnetic field distribution data and the board near electromagnetic field distribution data.

Electromagnetic wave analysis apparatus and design support apparatus

An equivalent material constant calculation system that calculates an equivalent material constant of a structure constituted by a plurality of materials includes a shape data input portion that inputs shape data, a material data input portion that inputs material constant data, a dividing portion that divides the structure into a plurality of small regions, and a small region interior calculation portion that calculates equivalent material constants in the small regions, in which the small region interior calculation portion, based on the shape data and material constant data, with a function that includes a value in a variable that expresses a position in at least one direction in the small region, expresses an equivalent material constant for a region that is a portion of a small region, and using the function, calculates an equivalent material constant for the small region with respect to the at least one direction.

Equivalent material constant calculation system, storage medium storing an equivalent material constant calculation program, equivalent material constant calculation method, design system, and structure manufacturing method

A 3-frequency branching circuit in the past could not be used for a system wherein a TDMA method such as GSM and DCS and a W-CDMA method such as UMTS are mixed. The 3-frequency branching circuit equipped with branching means having first and second internal terminals, an antenna terminal of connecting to an antenna, a low-pass filter connected between the first internal terminal and the antenna terminal, and a high-pass filter connected between the second internal terminal and the antenna terminal, a switching circuit of switching between GSM TX and GSM RX, a switching circuit of switching between DCS TX, DCS RX and a third internal terminal, and a duplexer connected to the third internal terminal.

3-frequency branching circuit, branching circuit and radio communication equipment

Growing community of inventors

Katano, Japan

Toru Yamada