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1. 发明专利

JP2002111304A SLIT-LOADED FILTER 失效
公开(公告)号：JP2002111304A
公开(公告)日：2002-04-12
申请号：JP2000293774
申请日：2000-09-27
申请人： SHARP KK , KANKYO DENJI GIJUTSU KENKYUSHO
发明人： MIZUGUCHI YUKINORI , TANI SADAHIRO
IPC分类号： H05K1/02 , H01P1/203 , H05K3/46
摘要： PROBLEM TO BE SOLVED: To provide a slit-loaded filter, which eliminates the need of countermeasure parts and its fitting space at low costs. SOLUTION: On the ground surface of a printed circuit board 1, a cutout 2 is formed at right angle to a signal wiring 3 to constitute a filter. By changing the length of the cutout 2, transmission characteristics can be changed.

2. 发明专利

JP2001284131A THROUGH-TYPE EMI FILTER FORMED OF COMPOSITE MAGNETIC MATERIAL AND FILTER ARRAY 失效
公开(公告)号：JP2001284131A
公开(公告)日：2001-10-12
申请号：JP2000100377
申请日：2000-04-03
申请人： KANKYO DENJI GIJUTSU KENKYUSHO , TDK CORP
发明人： AKINO NAOHARU , AKACHI YOSHIAKI , KONNO TADASHIGE
IPC分类号： H01F1/37 , H01F1/20 , H01F17/06 , H01F27/00 , H03H7/01
摘要： PROBLEM TO BE SOLVED: To restrain a through-type EMI filter from radiating electromagnetic interference noises so as to effectively suppress transmissible electromagnetic interference noises by a method, where electromagnetic waves are reflected less (standing waves are reduced) at the input and output terminal of the through-type EMI filter. SOLUTION: A composite magnetic material, composed of metal magnetic flat powder, powder of ferrite sintered body of indefinite shape, and a resin binder is molded into a cylindrical composite magnetic body 2, the cylindrical composite magnetic body 2 is loaded into a coaxial structure composed of a center conductor 11 and an outer conductor 12, and the center conductor 11 is made to penetrate through the center hole bored in the composite magnetic body 2 for the formation of a through-type EMI filter. Furthermore, a mounting flange 13 is provided on the outer periphery of the outer conductor 12, and a mounting nut 15 is screwed on a thread 14, which is provided on the outer surface of the outer conductor 12.

3. 发明专利

JP2001116785A METHOD AND APPARATUS FOR MEASURING RADIATION ELECTROMAGNETIC JAMMING WAVE 失效
公开(公告)号：JP2001116785A
公开(公告)日：2001-04-27
申请号：JP29492499
申请日：1999-10-18
申请人： KANKYO DENJI GIJUTSU KENKYUSHO , TDK CORP
发明人： AKINO NAOHARU , SHINOZUKA TAKASHI , HASHIMOTO YASUO , TANAKA TAKASHI
IPC分类号： G01R29/08 , H04B17/00 , H04B17/345
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for measuring a radiation electromagnetic jamming wave capable of replacing a receiving antenna, omitting a labor hour of installing, reducing an unevenness of a measured value due to an installing state of the antenna and shortening a measuring time. SOLUTION: When a radiation electromagnetic jamming wave is measured by using a plurality of types of receiving antennas A1, A2 and A3, their antennas are fixedly arranged on a circumference of a predetermined measuring distance from a rotating center of a turntable 10 at an outside of the turntable 10. A radio wave absorber 13 is laid on a floor surface between a wooden table 12 as a nonconductive support base for installing an equipment 11 under test on the turntable and the antenna by using an outdoor site or a radio wave half-anechoic chamber disposed at an angle of 30 to 180 degrees to the rotating center of the adjacent antennas.

4. 发明专利

JP2001068936A ARTIFICIAL NOISE GENERATOR 失效
公开(公告)号：JP2001068936A
公开(公告)日：2001-03-16
申请号：JP24518399
申请日：1999-08-31
申请人： KANKYO DENJI GIJUTSU KENKYUSHO , IWATSU ELECTRIC CO LTD
发明人： YAMANE KOJI , SHINOZUKA TAKASHI , SETOGUCHI KAORU
IPC分类号： H03B29/00 , G01R31/28 , G06F7/58 , G06F19/00
摘要： PROBLEM TO BE SOLVED: To specify the amplitude probability distribution of noise and to simultaneously specify the pulse width distribution and the pulse interval distribution at a specified amplitude level by providing an arbitrary distribution random number generation part corresponding to the divided amplitude probability distributions. SOLUTION: An arbitrary distribution random number generator 100 is used for exclusively generating a signal x1 according to apd1(x1) and a signal x2 according to tpd2(x2). A signal i1 according to pdd(i1) is generated by an arbitrary random number generator 200 and during time Ti1 corresponding to i1, the signal x1 according to apd1(x1) is continuously generated by the arbitrary random number generator 100. Afterwards, a signal i2 according to psd(i2) is generated by the arbitrary random number generator 200 and during time Ti2 corresponding to i2, the signal x2 according to apd2(x2) is continuously generated by the arbitrary random number generator 100. These adp1(x1) and adp2(x2) and these pdd(i1) and psd(i2) are switched by a signal (s) from a selector SL.

5. 发明专利

JP2000277335A COMMON-MODE CHOKE COIL 失效
公开(公告)号：JP2000277335A
公开(公告)日：2000-10-06
申请号：JP7840599
申请日：1999-03-23
申请人： KANKYO DENJI GIJUTSU KENKYUSHO , TOKIN CORP
发明人： TSUDA BUNSHIRO , OSADA TAKAYUKI
IPC分类号： H01F41/12 , H01F17/00 , H01F19/00 , H01F41/14
摘要： PROBLEM TO BE SOLVED: To provide a common-mode choke coil which can suppress common- mode current and has little influence on transmission signals, even in a high-frequency (several hundreds of MHz to several GHz). SOLUTION: This coil is provided with a inscribed dielectric substrate 2, forming a dielectric layer inside a hollow of a magnetic body 1 composed of a ferrite core. Two pairs of conductor lines 3, 4 having a parallel plate electrode shape, each functioning as a coil, are provided on both main surfaces of the dielectric substrate 2 which functions as a magnetic core so as to form parallel tracks. The coil is constituted, such that a characteristic impedance Zb formed by a differential mode inductance Le in a minute zone generated by the parallel tracks and the magnetic core and a minute-zone capacitance Cx constituted between the parallel tracks, is equal to a matching impedance Zo. At operation with a common-mode current Ic causing electromagnetic interfering waves, the minute-zone capacitance Cx does not affect, while a combined inductance Lc between the input and the output suppresses the common-mode current Ic.

6. 发明专利

JP2000114048A COMMON-MODE FILTER 失效
公开(公告)号：JP2000114048A
公开(公告)日：2000-04-21
申请号：JP29623798
申请日：1998-10-05
申请人： KANKYO DENJI GIJUTSU KENKYUSHO , SANYO ELECTRIC CO
发明人： KAIZAKI YASUHIRO
IPC分类号： H01F27/28 , H01F17/00 , H03H7/09
摘要： PROBLEM TO BE SOLVED: To operate as a low-pass filter to a common-mode current so as to form a signal blocking band to a frequency of several hundred MHz or more and provide a transmission characteristic of low loss to a differential-mode current. SOLUTION: A pair of grounding conductor layers 6 and 11 are formed respectively on the front and rear surfaces of a laminated dielectric substrate, and a pair of linear conductors 21 and 22 are provided in parallel between the grounding conductor layers 6 and 11 in the dielectric substrate. The conductors 21 and 22 electrically connect conductor sections 7a and 8a whose patterns are formed close to and parallel to the grounding conductor layer 6, with conductor sections 9a and 10a whose patterns are formed close to and parallel to the grounding conductor layer 11 respectively.

7. 发明专利

JPH11340817A COUNTER 失效
公开(公告)号：JPH11340817A
公开(公告)日：1999-12-10
申请号：JP16426198
申请日：1998-05-28
申请人： ANRITSU CORP , KANKYO DENJI GIJUTSU KENKYUSHO
发明人： UCHINO SEIJI , HOSOYA HARUHIKO
IPC分类号： H03K21/08
摘要： PROBLEM TO BE SOLVED: To accurately count clock signals at a high speed. SOLUTION: A counter circuit 11 is constituted of a 7-stage shift register circuit, consisting of 7 flip-flop circuits 121 -127 that receive clock signals CL of count objects in parallel and an EXOR circuit 13 that feeds back an exclusive OR of 6th stage and 7th stage data of the shift register circuit to the 1st stage, a latch circuit 14 latches the output data of the counter circuit 11, and a data conversion circuit 15 converts the latched data into data which denote the number of times of stepping of output data of the counter circuit 11 and provides an output.

8. 发明专利

JPH11260610A RADIO WAVE ABSORBING MATERIAL 失效
公开(公告)号：JPH11260610A
公开(公告)日：1999-09-24
申请号：JP6154398
申请日：1998-03-12
申请人： KANKYO DENJI GIJUTSU KENKYUSHO
发明人： OTA HIROYASU
IPC分类号： H01F1/00 , H01F41/02 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To provide a radio wave absorbing material which provides absorptive attenuation of 20 dB or more in a greater frequency bandwidth. SOLUTION: A radio wave absorbing material constituted of a magnetic portion 1 mixed with a non-magnetic portion 2 is provided. In the case, the non-magnetic portion in the cross section of the absorptive material is caused to include an island portion having an average diameter of 10 μm or more, and the magnetic portion is made of a ferrite sintered body. The volumetric mixture rate F of the magnetic portion is set 0.2-0.8, and a relation 0.3 Fμrs '

9. 发明专利

JPH11248771A APPARATUS FOR MEASURING CROSS OVER VALUE RATE DISTRIBUTION 失效
公开(公告)号：JPH11248771A
公开(公告)日：1999-09-17
申请号：JP7142998
申请日：1998-03-05
申请人： ANRITSU CORP , KANKYO DENJI GIJUTSU KENKYUSHO
发明人： UCHINO SEIJI , SHINOZUKA TAKASHI , HOSOYA HARUHIKO
IPC分类号： G01R29/08 , G06F17/18 , H03M1/08
摘要： PROBLEM TO BE SOLVED: To realize high amplitude resolution in a small circuit scale with a small consumption of power. SOLUTION: In this apparatus 20, a first histogram detection circuit 23 detects an output frequency Hu for every quantization level of data obtained by quantizing in a predetermined measurement period analog input signals S by an A/D converter 21. Moreover, a data selection circuit 24 selects steadily either a larger or a smaller one of data output from the A/D converter 21 and data next to the data, and a second histogram detection circuit 25 detects an output frequency Hv for every quantization level of the selected data. A cross over value for every quantization level of the input signals is calculated on the basis of these detected output frequencies.

10. 发明专利

JP2000348944A THROUGH-TYPE EMI FILTER AND FILTER ARRAY 失效
公开(公告)号：JP2000348944A
公开(公告)日：2000-12-15
申请号：JP16249599
申请日：1999-06-09
申请人： KANKYO DENJI GIJUTSU KENKYUSHO , TDK CORP
发明人： AKINO NAOHARU , TANAKA TAKASHI , SASAKI HIDENORI , AKACHI YOSHIAKI , KONNO TADASHIGE
IPC分类号： H01F37/00 , H01F17/04 , H01F17/06 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To suppress electromagnetic interference noise by making the input impedance and output impedance of a through-type EMI filter match as much as possible with the power source impedance and load impedance of a through- type EMI filter insert circuit, and due to absorption effect in the through-type EMI filter. SOLUTION: A filter element 20, where taper 22a and 22b are formed on both sides of a cylindrical composite magnetic body 21 is provided in a coaxial structure body 10, with a central conductor 12 of the coaxial structure body penetrated into a through-hole 23 of the filter element 20. The filter element 20, which is a composite magnetic body, comprises a metal magnetic powder and a resin binder, with the metal magnetic powder being the main component.

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