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公开(公告)号：JP2010192466A
公开(公告)日：2010-09-02
申请号：JP2007118537
申请日：2007-04-27
Inventor： MASUDA KOICHIRO , KUSUMOTO MANABU , HARADA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a wide band capacitance element which increases an upper limit of a usable frequency of a capacitive component to a high frequency band without reducing the capacitance of a low frequency band.
SOLUTION: Dielectric plates 111, 112 having different compositions are formed on a electrode plate 101 while another electrode plate 102 is formed thereon. At least one of the dielectric plates 111, 112 has a singular point of polarization in an object frequency band. For example, the dielectric plate 111 is made from a silicon carbide SiC while the dielectric plate 112 is made from an aluminum oxide Al
2 O
3 . The dielectric plate 111 has a singular point of polarization at 246 MHz. That is, the dielectric constant greatly changes around at the frequency of 246 MHz.
COPYRIGHT: (C)2010,JPO&INPITAbstract translation: 要解决的问题：提供一种宽带电容元件，其将电容分量的可用频率的上限增加到高频带，而不降低低频带的电容。 解决方案：具有不同组成的电介质板111,112形成在电极板101上，而在其上形成另一电极板102。 电介质板111,112中的至少一个在物体频带中具有奇点偏振点。 例如，电介质板111由碳化硅SiC制成，而电介质板112由氧化铝Al 3 SB 3制成。 电介质板111具有246MHz的奇异点偏振。 也就是说，介电常数在246MHz的频率附近大大变化。 版权所有（C）2010，JPO＆INPIT
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32.发明专利Apparatus, method and program for analyzing printed circuit board, and recording medium 有权用于分析印刷电路板和记录介质的装置，方法和程序
公开(公告)号：JP2006318416A
公开(公告)日：2006-11-24
申请号：JP2005143127
申请日：2005-05-16
Inventor： KOBAYASHI NAOKI , HARADA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide an apparatus, a method and programs for analyzing printed circuit boards, which can be used for designing printed circuit boards that reduce interferences due to common-mode noise transmitted through a power supply system, and a recording medium.
SOLUTION: Structure data and physical property data for a printed circuit board are input into a board information input part 2, a frequency for analysis is input into a frequency specifying part 3, and a desired amount of attenuation for common-mode noise is input into an amount of attenuation specifying part 4. An analysis part 5 calculates a propagation distance that common-mode noise in the frequency input into the frequency specifying part 3 is attenuated to the desired amount input into the amounts of attenuation specifying part 4 within the printed circuit board based on the structure data and the physical property data for the printed circuit board, which are input into the board information input part 2. Subsequently, the distance between power supply terminals is determined based on the propagation distance calculated in the analysis part 5, and then the most appropriate arrangement for power supply terminals is displayed on a display part 6.
COPYRIGHT: (C)2007,JPO&INPITAbstract translation: 要解决的问题：提供一种用于分析印刷电路板的装置，方法和程序，其可用于设计减少由于通过电源系统传输的共模噪声引起的干扰的印刷电路板，以及 记录介质。 解决方案：将印刷电路板的结构数据和物理属性数据输入到板信息输入部分2中，用于分析的频率被输入到频率指定部分3中，并且用于共模噪声的期望衰减量 被输入到衰减指定部分4的量。分析部分5计算输入到频率指定部分3的频率中的共模噪声被衰减到输入到衰减指定部分4的量的期望量的传播距离 基于印刷电路板的结构数据和物理属性数据的印刷电路板，其输入到板信息输入部分2.随后，基于在分析中计算的传播距离来确定电源端子之间的距离 第5部分，然后在显示部分6上显示最合适的电源端子布置。版权所有：（C）2007，JPO＆INPI Ť
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公开(公告)号：JP2006040308A
公开(公告)日：2006-02-09
申请号：JP2005290507
申请日：2005-10-03
Applicant: Nec Corp , Nec Informatec Systems Ltd , 日本電気株式会社 , 株式会社Nec情報システムズ
Inventor： SASAKI HIDEKI , YAGUCHI TAKAHIRO , WAKUI AKIRA , ETANI SEIJI , HARADA TAKASHI , KURIYAMA TOSHIHIDE
Abstract: PROBLEM TO BE SOLVED: To easily allow computing an amount of electromagnetic radiation caused by wiring of a printed circuit board and easily and precisely allow acquiring the amount of the radiation of the electromagnetic radiation from the whole of the circuit board without performance of an electromagnetic field simulation.
SOLUTION: A computing means 16 for amount of DM radiation computes an amount of differential mode (DM) radiation electromagnetic radiation caused by the wiring based on design information, a computing means 17 for rate of amount of CM radiation computes the rate of the amount of common mode (CM) radiation (CM/DM) between the amount of common mode (CM) radiation and the amount of differential mode (DM) radiation caused by a grand plane corresponding to the wiring based on the design information and a computing means 20 for amount of MAJ radiation computes the amount of major (MAJ) radiation from the rate of amount of MAJ radiation (MAJ/DM) computed from the rate of amount of CM radiation by a computing means 18 for rate of amount of MAJ radiation and the amount of differential mode (DM) radiation.
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：为了容易地计算由印刷电路板的布线引起的电磁辐射量，并且容易且精确地允许从整个电路板获取电磁辐射的辐射量，而不会 电磁场模拟。 解决方案：用于DM辐射量的计算装置16基于设计信息计算由布线引起的差模（DM）辐射电磁辐射的量，用于CM辐射量的速率的计算装置17计算 根据设计信息，由共同模式（CM）辐射量和与布线对应的大平面引起的差模（DM）辐射量之间的共模（CM）辐射量（CM / DM） MAJ辐射量的计算装置20根据由计算装置18计算的MAJ辐射量（MAJ / DM）的量的速率计算MAJ辐射量（MAJ / DM），其量为MAJ的量 辐射和差模（DM）辐射量。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2001318961A
公开(公告)日：2001-11-16
申请号：JP2000274301
申请日：2000-09-11
Applicant: NEC CORP
Inventor： SASAKI HIDEKI , HARADA TAKASHI , KURIYAMA TOSHIHIDE
Abstract: PROBLEM TO BE SOLVED: To provide a design supporting tool and a design supporting method of a printed circuit board and electronic equipment, etc., to suppress common mode current to flow in a board grand plane and a cable to be a cause of unnecessary electromagnetic radiation. SOLUTION: The design supporting tool is constituted of a tool 1A to convert at least one set of an electronic device, wiring and the ground plane into a model for analyzing an electromagnetic field from layout information of the printed circuit board, a tool 2A to calculate distribution of magnetic field intensity in the vicinity of the ground plane by using the electromagnetic field analysis model by specifying frequency, a tool 3A having a tool to superpose the distribution of magnetic field intensity on a wiring position, to judge whether or not a position where the magnetic field or current is strong is approximated to the wiring position and to output a judgment result and to check whether or not the wiring is arranged at a place where the common mode current is easily supplied to the ground plane.
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35.发明专利
公开(公告)号：JP2000305968A
公开(公告)日：2000-11-02
申请号：JP11420099
申请日：1999-04-21
Applicant: NEC CORP
Inventor： SASAKI HIDEKI , HARADA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To suppress variation in power supply voltage during the preparation of a layout of a substrate or after the preparation of the layout before the manufacture of the substrate and to evaluate whether a printed circuit board preventing the generation of unnecessary electromagnetic radiation due to the resonance of a power supply system circuit is designed or not. SOLUTION: The layout information of respective layers including packaged parts on the whole substrate is inputted by an input device 1, only the layout information of the power supply system circuit out of the inputted information is extracted by an extraction means 10 and the extracted information is stored in a storage part 13 built in a storage device 3. The stored information is entered into a conversion means 11 and converted into an electric circuit information and an operation means 12 calculates the impedance characteristic of the power supply system circuit observed from the power supply terminal connection position of a certain specified active element by using the electric circuit information and displays the calculated result on an output device 4.
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Patent Agency Ranking
公开(公告)号：JP2000022287A
公开(公告)日：2000-01-21
申请号：JP18446998
申请日：1998-06-30
Applicant: NEC CORP
Inventor： SASAKI HIDEKI , HARADA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To prevent the radiation of an unnecessary electronic wave from a board power supply wiring system caused by the power supply voltage fluctuation of the printed board. SOLUTION: A printed board 1 is provided with at least one ground layer 15 and at least one signal layer for mounting an active element such as an IC and an LSI. In this case, the printed board 1 is composed of a first capacitor 7a that is connected between a power supply terminal 6a of each active element and a ground layer 15, a first power supply wire 9a that is connected to the power supply terminal 6a, a second capacitor 10 that is connected between the end part being not connected to the first capacitor 7a of the first power supply wire 9a and the ground layer 15, and a second power wire 12 that supplies the power supply of all active elements of the printed board 1 being connected to the connection node between the second capacitor 10a and the first power supply wire 6a. The characteristic impedance of the first power supply wire 9a is set at least three times larger than impedance in the maximum frequency that becomes a problem in the electromagnetic wave radiation of the first capacitor 7a.
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公开(公告)号：JP2000009775A
公开(公告)日：2000-01-14
申请号：JP17310198
申请日：1998-06-19
Applicant: NEC CORP
Inventor： SASAKI HIDEKI , HARADA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To specify the generating source of a high frequency current causing electromagnetic wave radiation flowing in a cable connected to a plurality of electronic equipment. SOLUTION: This current measuring device measures current phase distribution on a cable 8, connected to two electronic instruments A, B using two loop antennas 2, 3, an oscilloscope 4 and an information processing device 5 taking in a loop antenna output voltage waveform data. One loop antenna is used for getting a trigger signal, and the other loop antenna is used for measuring the antenna output voltage waveform at each point of the cable 8, while it is swept along the cable 8. There voltage waveforms thus obtained are subjected to a Fourier transform, and a current phase distribution on the cable 8 of every frequency components is sought. In the phase distribution, it is decided that a current flows from the position of a large phase to the position of a small phase, and it is specified that a generating source of the current flowing in the cable 8 exists in an instrument in the direction of larger phase.
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公开(公告)号：JPH08101262A
公开(公告)日：1996-04-16
申请号：JP23879894
申请日：1994-10-03
Applicant: NEC CORP
Inventor： SASAKI HIDEKI , HARADA TAKASHI
Abstract: PURPOSE: To accurately measure the waveform on time axis of magnetic field and current with a wide range of frequency components without being restricted by the shape of an object to be measured. CONSTITUTION: The measuring system consists of a probe 2 for measuring magnetic field, a voltage waveform measuring instrument 3 for converting the waveform into numeric data and transferring the data externally, and a waveform processing device 4. The waveform processing device consists of a numeric value operation part 5 for performing operation to the numeric data of time-axis waveform transmitted from the voltage waveform measuring instrument, a probe calibration data storage part 6 for measuring magnetic field with a function for inputting amplitude and phase related to the ratio of a magnetic field strength H (f) to be measured of the probe for measuring magnetic field to an output voltage V (f) and storing the data, and a display part 7 for outputting the operated data and displaying the data as a time-axis waveform.
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公开(公告)号：JPH05133989A
公开(公告)日：1993-05-28
申请号：JP32380091
申请日：1991-11-12
Applicant: NEC CORP
Inventor： HARADA TAKASHI
Abstract: PURPOSE:To enable a measurer to monitor a screen without movement at the time of testing the radiation filed resistance of a specimen which requires evaluation on a TV screen, CRT, etc. CONSTITUTION:The title device is constituted of a height-adjustable specimen fixing stage 2 for fixing a specimen, arm 3 extended in the horizontal direction from the center of the stage 2, and electromagnetic wave radiating antenna 4 fitted to the arm 3 directly or through an antenna support 5 extended in the vertical direction. The antenna 4 is fitted to the arm 3 or support 5 by means of an antenna fitting section 7. Since the arm 3 makes 360 deg. revolution in the horizontal direction around the center of the stage 2, the antenna 4 also makes a revolution at an angle of 360 deg. along the circumference of a circle with a radius equal to the distance between the center of the stage 2 and antenna 4.
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公开(公告)号：JPH04116999A
公开(公告)日：1992-04-17
申请号：JP23743990
申请日：1990-09-07
Applicant: NEC CORP , MIYAGI NIPPON DENKI KK
Inventor： HARADA TAKASHI , INOMATA MASAYUKI , HATAKEYAMA KENICHI , FUJIWARA NOBORU , MASUDA NORIO
IPC: H05K9/00
Abstract: PURPOSE:To obtain a high-electromagnetic-shielding-ability enclosure by fixing a magnetic material to the cord drawing openings of the electrical and electronic equipment mounting enclosure. CONSTITUTION:A magnetic material 3 is fixed to the outside of an enclosure. An unnecessary electromagnetic wave leaking to the outside of the enclosure through its openings 2 is reflected by a common mode choke including the magnetic material 3, a cable, and a code, therefore, it is not radiated to the outside. The area of the openings is preferably small to enhance the leakage suppression effect. The magnetic material 3 can be removed from the openings of the enclosure and divided into a plurality of pieces to divide the openings, therefore, the cable and cord can be passed through the openings even if the openings are smaller than a connector and a socket.
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