WO2006070722A1 - ノイズフィルタ - Google Patents
ノイズフィルタ Download PDFInfo
- Publication number
- WO2006070722A1 WO2006070722A1 PCT/JP2005/023744 JP2005023744W WO2006070722A1 WO 2006070722 A1 WO2006070722 A1 WO 2006070722A1 JP 2005023744 W JP2005023744 W JP 2005023744W WO 2006070722 A1 WO2006070722 A1 WO 2006070722A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lead wire
- base member
- signal line
- noise filter
- capacitor
- Prior art date
Links
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000003990 capacitor Substances 0.000 claims abstract description 55
- 239000011324 bead Substances 0.000 claims abstract description 51
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910000679 solder Inorganic materials 0.000 description 8
- 238000003825 pressing Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/075—Ladder networks, e.g. electric wave filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/35—Feed-through capacitors or anti-noise capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H1/0007—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters
Definitions
- the present invention relates to a noise filter, and more particularly to a noise filter using a capacitor.
- a noise filter is inserted between the power supply lines. Bypass external noise input through the power line.
- a noise filter described in Patent Document 1 includes a multilayer capacitor 111, conductive wires 112 and 113, cylindrical ferrite beads 1 and 115, a ground plate 118, and a feedthrough capacitor 119 as shown in FIG. RU
- the conductive wires 112 and 113 have a substantially U-shape, and the electrodes 111a and 111b of the multilayer capacitor 111 are soldered to the center of the conductive wires 112 and 113.
- cylindrical ferrite beads 114 and 115 are passed through both ends 112a and 112a of the conductive wire 112.
- a lead-through capacitor 119 is passed along with the cylindrical ferrite bead 114 to one leg 112a of the lead 112 as a signal line lead among the leads 112 and 113.
- the feedthrough capacitor 119, the other leg portion 112a of the conducting wire 112, and both leg portions 113a and 113a of the conducting wire 113 pass through holes provided in the ground plate 118, and the cylindrical ferrite beads 114, Fix the outside of 115 with insulating resin 120 by molding
- the other leg 112a of the conductor 112 is insulated from the ground plate 118, and one leg 112a of the conductor 112 is soldered to the electrode 119a inside the feedthrough capacitor 119.
- the outer electrode 119b is soldered to the ground plate 118.
- both legs 113a and 113a of the conductive wire 113 as the ground lead wire are ground play. Soldered to G118.
- Each of the legs 112a and 113a of the conductive wires 112 and 113 is, for example, a pair of input ends of a signal line lead wire and a ground lead wire, and the other leg portion of the conductive wires 112 and 113, respectively.
- Each of 112a and 113a constitutes a pair of, for example, output terminals of a signal line lead wire and a ground lead wire.
- the noise filter is a discrete (with feet) type noise filter that is mounted by inserting the legs 112a, 113a of the conductive wires 112, 113 into through holes provided in a printed wiring board or the like.
- the noise filters described in Patent Documents 1 to 4 are all discrete (with legs) type noise filters. Therefore, it could not be used as a surface mount component that the future market will demand.
- Patent Literature 1 Actual Fairness 1-1 22258
- Patent Document 2 Japanese Utility Model Publication No. 59-22514
- Patent Document 3 Japanese Utility Model Publication 2-18587
- Patent Literature 4 Japanese Utility Model Publication No. 6-31777
- a main object of the present invention is to provide a noise filter that can be surface-mounted. Furthermore, another object of the present invention is to provide a noise filter which can achieve the main object and can reduce the height and the efficiency of assembly.
- a noise filter includes a base member, a signal line lead wire and a ground lead wire, and a cylindrical light bead passed through the signal line lead wire. And a feedthrough capacitor threaded to the output side of the cylindrical light bead of the signal line lead wire and an input side of the cylindrical ferrite bead of the signal line lead wire and the lead lead wire.
- Each of the signal line lead wire and the ground lead wire is formed in a flat shape and is bent along the outer surface of the base member, from the bottom surface of the base member. Is also characterized by protruding external terminals.
- a noise filter includes a base member, a signal line lead wire, and a gland.
- the depth of the recess is set so that the axis of the through hole of the accommodated cylindrical light bead and the axis of the through hole of the through capacitor are located on the same plane on the base member.
- Each end of the lead wire is formed flat and is bent along the outer surface of the base member to form an external terminal And wherein the door.
- the cylindrical ferrite bead, the feedthrough capacitor, and the capacitor may be covered with a wax member and fixed to the base member, the signal line lead wire, and the ground lead wire. Furthermore, you may provide the upper cover which covers a base member.
- the end portions of the signal line lead wire and the ground lead wire are formed flat and bent along the outer surface of the base member. Since it is a surface mount type external terminal, a noise filter capable of surface mounting can be obtained. Furthermore, by projecting the external terminals beyond the bottom surface of the base member, the noise filter is not struck when the noise filter is surface-mounted on a printed wiring board or the like, and can be mounted in a stable state.
- the noise filter can be reduced in height. Furthermore, since the depth of the concave portion of the base member is set so that the axis of the through hole of the cylindrical ferrite bead and the axis of the through hole of the feedthrough capacitor are located on the same plane on the base member, it is assembled efficiently. Can do.
- FIG. 1 shows a manufacturing process of a noise filter according to a first embodiment of the present invention, in which (A) is a plan view and (B) is a front view of (A).
- FIG. 2 is a plan view showing a noise filter manufacturing process following FIG. 1.
- FIG. 3 is a plan view showing a noise filter manufacturing process following FIG. 2.
- FIG. 4 is a plan view showing the noise filter manufacturing process following FIG. 3.
- FIG. 5 is a plan view showing a manufacturing process of the noise filter following FIG. 4.
- FIG. 6 is a perspective view showing a manufacturing process of the noise filter following FIG. 5.
- FIG. 7 is a plan view showing a noise filter manufacturing process following FIG. 6.
- FIG. 8 is an internal plan view showing the noise filter according to the first embodiment of the present invention.
- FIG. 9 is a cross-sectional view of each part of the noise filter shown in FIG.
- FIG. 10 is a cross-sectional view of each part of the noise filter shown in FIG.
- FIG. 11 is an electrical equivalent circuit diagram of the noise filter shown in FIG.
- FIG. 12 is an internal plan view showing a noise filter according to a second embodiment of the present invention.
- FIG. 13 is an electrical equivalent circuit diagram of the noise filter shown in FIG.
- FIG. 14 is an internal plan view showing a noise filter according to a third embodiment of the present invention.
- FIG. 15 is a sectional view showing a modification of the noise filter according to the first embodiment.
- FIG. 16 is a perspective view with a part of a conventional noise filter cut out.
- FIGS. 1 to 11 Refer to the first embodiment, FIGS. 1 to 11
- the noise filter 1A is assembled as follows. That is, as shown in FIGS. 1 (A) and (I), the cylindrical fluorescent beads 2 and 3 and the feedthrough capacitor 5 are passed through the lead wire 11 cut to a predetermined length. Similarly, the cylindrical ferrite beads 4 are passed through the lead wires 12 cut to a predetermined length.
- the lead wires 11 and 12 are formed by applying a solder dip to a copper wire having a circular cross section having a diameter of about 0.8 mm.
- the lead wires 11 and 12 on which the components 2 to 5 are mounted are set on the processing conveyor belt 30.
- the lead wire 11 is a signal line lead wire
- the lead wire 12 is a ground lead wire.
- Each lead wire 11, 12 is conveyed by a force conveyor belt 30, and as shown in FIGS. 1 (A) and (II), the lead wires 11, 12 are pressed by a pressing jig 31 indicated by a one-dot chain line. One end portion 11a, 12a of this is crushed flat. Similarly, as shown in FIGS. 1 (A) and (III), the other end portions lla and 12a of the lead wires 11 and 12 are crushed flat by the pressing jig 32 indicated by a one-dot chain line.
- both end portions lla and 12a of the lead wires 11 and 12 are preliminarily bent by the pressing jigs 33 and 34 indicated by alternate long and short dash lines. You will be swayed. Thereafter, the lead wires 11 and 12 are removed from the processing conveyor belt 30.
- a base member 21 is prepared.
- the base member 21 is made of an insulating resin such as PPS resin.
- a grounding plate 7 (shown with diagonal lines in FIG. 2) is attached to the upper surface of the base member 21.
- recesses 22, 23 and 24 for storing the cylindrical ferrite beads 2 to 4, a recess 25 for storing the feedthrough capacitor 5, and a multilayer capacitor 6 (described later) And a recess 26 for storing the.
- the lead wires 11 and 12 to which the components 2 to 5 are mounted are placed on the upper surface of the base member 21.
- Cylindrical ferrite beads 2 to 4 and feedthrough capacitor 5 are respectively housed and positioned in recesses 22 to 25 of base member 21.
- both end portions 11 a, 12 a of the lead wires 11, 12 are bent according to the outer surface of the base member 21 by the press jigs 35, 36 indicated by alternate long and short dash lines.
- the lead wires 11 and 12 are attached to the base member 21.
- the multilayer capacitor 6 is housed in the recess 26 of the base member 21 and positioned. Thereafter, the cylindrical ferrite beads 2 to 4, the feedthrough capacitor 5 and the multilayer capacitor 6 are covered with wax and fixed to the base member 21 and the lead wires 11 and 12. As a result, the parts 2 to 6 which are not completely fixed to the base member 21 are not only fixed to the base member 21 and the lead wires 11 and 12 by wax, but also the feedthrough capacitor 5 and the multilayer capacitor 6 Since the surface is coated with wax, moisture absorption of the feedthrough capacitor 5 and the multilayer capacitor 6 can be prevented, and a highly reliable noise filter can be obtained.
- the feedthrough capacitor 5 The hot-side electrode 5a provided in the through-hole and the lead wire 11 are soldered, and the ground-side electrode 5b provided on the outer peripheral surface of the through-capacitor 5 and the ground plate 7 are soldered. Furthermore, the solder paste 40 solders the hot side electrode 6a of the multilayer capacitor 6 to a position between the cylindrical ferrite beads 2 and 3 of the lead wire 11 and the dial side electrode 6b of the multilayer capacitor 6 is The lead wire 12 is soldered to the position after the cylindrical ferrite bead 4 and the ground plate 7.
- the upper lid 20 is fitted and attached to the base member 21 so as to cover the upper surface of the base member 21.
- the central part of the upper surface of the upper lid 20 is a flat surface.
- the noise filter 1 A is accommodated in each of the recesses 52 of the tape 51 and taped as shown in FIG.
- cylindrical ferrite beads 2 and cylindrical ferrite beads 3 are inserted through the input side and output side of the signal line lead wire 11, respectively.
- a cylindrical ferrite bead 4 is inserted on the input side of the ground lead wire 12.
- a feedthrough capacitor 5 is inserted into the output side of the cylindrical ferrite bead 3 of the signal line lead 11.
- a multilayer capacitor 6 is electrically connected between the output side of the cylindrical ferrite bead 2 of the signal line lead 11 and the output side of the cylindrical ferrite bead 4 of the ground lead 12.
- FIGS. 9 (A), (B), (C), (D) are cross-sectional views at positions A, B, C, D in FIG. 8, respectively.
- (F) and (G) are cross-sectional views at positions E, F and G in FIG. 8, respectively.
- 9 and 10 the recesses 22 to 25 of the base member 21 are based on the axis of the through holes 2 a to 4 a of the cylindrical ferrite beads 2 to 4 and the axis of the through hole 5 c of the through capacitor 5. The depth is set so as to be located on the same plane on the member 21.
- Figure 11 shows the electrical equivalent circuit of the noise filter 1A.
- This noise filter 1A is formed in a flat shape at the ends 11a and 12a of the lead wires 11 and 12, and is bent along the outer surface of the base member 21, and is connected to a surface mount type external terminal. Therefore, surface mounting is possible.
- the base member 21 is arranged such that the axis of each through hole 2a to 4a of the cylindrical ferrite beads 2 to 4 and the axis of the through hole 5c of the through capacitor 5 are located on the same plane on the base member 21. Since the depth of the recesses 22 to 25 is set, the components 2 to 5 can be easily mounted on the lead wires 11 and 12, and the noise filter 1A can be assembled efficiently.
- the cylindrical ferrite beads 2 to 4 Since the cylindrical ferrite beads 2 to 4, the through capacitor 5 and the multilayer capacitor 6 accommodated in the recesses 22 to 26 of the base member 21 are arranged in the horizontal direction, the conventional ferrite beads 2 to 4 shown in FIG. Compared with a noise filter, the height can be reduced.
- the bottom surface of the base member 21 and the external terminals (end portions of the lead wires 11 and 12) l la and 12a are bent when the bending force is applied.
- the end portions 11a and 12a are protruded from the bottom surface of the base member 21 by providing a gap between the end portions 11a and 12a.
- solder paste it is preferable to apply a solder paste to the end portions 11a and 12a, perform heating and cooling on a flat surface, and reflow the applied solder paste.
- the unevenness of the end portions 11a and 12a protruding from the bottom surface of the base member 21 is reduced by the reflow solder having a flat surface, and the amount of solder contributing to soldering is increased. This is because the connection reliability when the noise filter 1A is surface-mounted on a printed wiring board or the like is improved.
- surface mounting is further stabilized by bending the external terminal portions 7a, 7a of the ground plate 7 substantially along the bottom surface of the base member 21.
- the noise filter 1B according to the second embodiment is obtained by omitting the cylindrical ferrite beads 2 and 4 from the noise filter 1A according to the first embodiment. It is as shown in FIG. Other configurations are the same as those of the first embodiment.
- FIGS. 12 and 13 the same members and portions as those of the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the noise filter 1C according to the third embodiment is further exposed to the output side of the feedthrough capacitor 5 of the signal line lead wire 11 in the noise filter 1B according to the second embodiment.
- a cylindrical ferrite bead 3A is inserted through the tube.
- the other configuration is the same as that of the second embodiment, and in FIG. 14, the same members and portions as those of the second embodiment are denoted by the same reference numerals, and redundant descriptions are omitted.
- the third embodiment improves noise removal characteristics at high frequencies by adding a cylindrical ferrite bead 3A.
- noise filter according to the present invention is not limited to the above-described embodiments, and can be variously modified within the scope of the gist thereof.
- the end portions 11 a and 12 a may be set on the same plane as the bottom surface of the base member 21 without protruding the end portions l la and 12 a of the lead wires 11 and 12 from the bottom surface of the base member 21.
- the lead wires 11 and 12 may be not only circular in cross section but also in quadrangular cross section or flat plate shape.
- the ferrite beads 2, 3, 3A, 4 and the feedthrough capacitor 5 may be not only cylindrical but also rectangular.
- the present invention is useful for a noise filter using a capacitor, and is particularly excellent in that surface mounting in a stable state is possible.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Filters And Equalizers (AREA)
- Coils Or Transformers For Communication (AREA)
- Transplanting Machines (AREA)
- Inorganic Insulating Materials (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT05820336T ATE433618T1 (de) | 2004-12-28 | 2005-12-26 | Rauschfilter |
EP05820336A EP1833165B1 (en) | 2004-12-28 | 2005-12-26 | Noise filter |
DE602005014889T DE602005014889D1 (de) | 2004-12-28 | 2005-12-26 | Rauschfilter |
CN2005800446026A CN101088215B (zh) | 2004-12-28 | 2005-12-26 | 噪声滤波器 |
KR1020077013898A KR100875370B1 (ko) | 2004-12-28 | 2005-12-26 | 노이즈 필터 |
US11/768,301 US7605677B2 (en) | 2004-12-28 | 2007-06-26 | Noise filter having filter components fitted into depressions in a base member |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004382064 | 2004-12-28 | ||
JP2004-382064 | 2004-12-28 | ||
JP2005-258987 | 2005-09-07 | ||
JP2005258987A JP3861914B2 (ja) | 2004-12-28 | 2005-09-07 | ノイズフィルタ |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/768,301 Continuation US7605677B2 (en) | 2004-12-28 | 2007-06-26 | Noise filter having filter components fitted into depressions in a base member |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006070722A1 true WO2006070722A1 (ja) | 2006-07-06 |
Family
ID=36614839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/023744 WO2006070722A1 (ja) | 2004-12-28 | 2005-12-26 | ノイズフィルタ |
Country Status (8)
Country | Link |
---|---|
US (1) | US7605677B2 (ja) |
EP (1) | EP1833165B1 (ja) |
JP (1) | JP3861914B2 (ja) |
KR (1) | KR100875370B1 (ja) |
CN (1) | CN101088215B (ja) |
AT (1) | ATE433618T1 (ja) |
DE (1) | DE602005014889D1 (ja) |
WO (1) | WO2006070722A1 (ja) |
Families Citing this family (17)
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---|---|---|---|---|
US9013259B2 (en) | 2010-05-24 | 2015-04-21 | Volterra Semiconductor Corporation | Powder core material coupled inductors and associated methods |
US8952776B2 (en) | 2002-12-13 | 2015-02-10 | Volterra Semiconductor Corporation | Powder core material coupled inductors and associated methods |
US8416043B2 (en) | 2010-05-24 | 2013-04-09 | Volterra Semiconductor Corporation | Powder core material coupled inductors and associated methods |
US7639103B2 (en) * | 2006-06-26 | 2009-12-29 | Panasonic Corporation | Piezoelectric filter, antenna duplexer, and communications apparatus employing piezoelectric resonator |
CN102007553B (zh) | 2008-03-14 | 2012-12-12 | 沃特拉半导体公司 | M相耦合的磁元件以及相关的电感结构 |
US9030976B2 (en) * | 2008-03-27 | 2015-05-12 | Silicon Image, Inc. | Bi-directional digital interface for video and audio (DIVA) |
US8830690B2 (en) * | 2008-09-25 | 2014-09-09 | International Business Machines Corporation | Minimizing plating stub reflections in a chip package using capacitance |
WO2010068915A2 (en) * | 2008-12-11 | 2010-06-17 | Synerchip Co., Ltd. | Power delivery over digital interaction interface for video and audio (diiva) |
US8040212B2 (en) * | 2009-07-22 | 2011-10-18 | Volterra Semiconductor Corporation | Low profile inductors for high density circuit boards |
US8638187B2 (en) | 2009-07-22 | 2014-01-28 | Volterra Semiconductor Corporation | Low profile inductors for high density circuit boards |
US8299882B2 (en) | 2009-07-22 | 2012-10-30 | Volterra Semiconductor Corporation | Low profile inductors for high density circuit boards |
US8674802B2 (en) | 2009-12-21 | 2014-03-18 | Volterra Semiconductor Corporation | Multi-turn inductors |
US10128035B2 (en) | 2011-11-22 | 2018-11-13 | Volterra Semiconductor LLC | Coupled inductor arrays and associated methods |
US9373438B1 (en) | 2011-11-22 | 2016-06-21 | Volterra Semiconductor LLC | Coupled inductor arrays and associated methods |
US9263177B1 (en) | 2012-03-19 | 2016-02-16 | Volterra Semiconductor LLC | Pin inductors and associated systems and methods |
JP6380034B2 (ja) * | 2014-11-17 | 2018-08-29 | 株式会社豊田自動織機 | 車載用電子機器 |
CN110417252A (zh) * | 2019-07-17 | 2019-11-05 | 陕西千山航空电子有限责任公司 | 一种电源滤波盒 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57162508A (en) * | 1981-03-31 | 1982-10-06 | Tdk Corp | Pierced noise filter and its production |
JPS60170315A (ja) | 1984-02-14 | 1985-09-03 | Murata Mfg Co Ltd | ノイズ除去フイルタ |
JPH0122258Y2 (ja) * | 1982-07-28 | 1989-06-30 | ||
JPH01142213U (ja) * | 1988-03-23 | 1989-09-29 | ||
JPH0218587Y2 (ja) * | 1982-12-20 | 1990-05-24 | ||
JPH04281608A (ja) | 1991-03-11 | 1992-10-07 | Murata Mfg Co Ltd | ノイズフィルタ |
JPH04369910A (ja) * | 1991-06-18 | 1992-12-22 | Mitsubishi Materials Corp | Lcフィルタ |
JP2000164431A (ja) * | 1998-11-25 | 2000-06-16 | Tokin Corp | インダクタ |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5922514U (ja) | 1982-07-28 | 1984-02-10 | 株式会社村田製作所 | ノイズフイルタ |
US4563659A (en) * | 1982-07-28 | 1986-01-07 | Murata Manufacturing Co., Ltd. | Noise filter |
JPH0631777Y2 (ja) | 1983-05-06 | 1994-08-22 | 株式会社村田製作所 | ノイズフィルタ |
US5374907A (en) * | 1992-03-05 | 1994-12-20 | Matsushita Electric Industrial Co., Ltd. | Chip type of noise suppressing filter for suppressing noise electromagnetically generated and method for manufacturing the filter |
JPH0696956A (ja) | 1992-09-17 | 1994-04-08 | Mitsubishi Electric Corp | 磁性セラミック電子部品 |
JP4030028B2 (ja) | 1996-12-26 | 2008-01-09 | シチズン電子株式会社 | Smd型回路装置及びその製造方法 |
JP3366916B2 (ja) | 1999-06-03 | 2003-01-14 | スミダコーポレーション株式会社 | インダクタンス素子 |
JP2002158555A (ja) | 2000-11-16 | 2002-05-31 | Tdk Corp | 積層型ノイズフィルタ |
JP2002324714A (ja) | 2001-02-21 | 2002-11-08 | Tdk Corp | コイル封入圧粉磁芯およびその製造方法 |
-
2005
- 2005-09-07 JP JP2005258987A patent/JP3861914B2/ja active Active
- 2005-12-26 CN CN2005800446026A patent/CN101088215B/zh active Active
- 2005-12-26 EP EP05820336A patent/EP1833165B1/en active Active
- 2005-12-26 WO PCT/JP2005/023744 patent/WO2006070722A1/ja active Application Filing
- 2005-12-26 KR KR1020077013898A patent/KR100875370B1/ko active IP Right Grant
- 2005-12-26 DE DE602005014889T patent/DE602005014889D1/de active Active
- 2005-12-26 AT AT05820336T patent/ATE433618T1/de not_active IP Right Cessation
-
2007
- 2007-06-26 US US11/768,301 patent/US7605677B2/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57162508A (en) * | 1981-03-31 | 1982-10-06 | Tdk Corp | Pierced noise filter and its production |
JPH0122258Y2 (ja) * | 1982-07-28 | 1989-06-30 | ||
JPH0218587Y2 (ja) * | 1982-12-20 | 1990-05-24 | ||
JPS60170315A (ja) | 1984-02-14 | 1985-09-03 | Murata Mfg Co Ltd | ノイズ除去フイルタ |
JPH01142213U (ja) * | 1988-03-23 | 1989-09-29 | ||
JPH04281608A (ja) | 1991-03-11 | 1992-10-07 | Murata Mfg Co Ltd | ノイズフィルタ |
JPH04369910A (ja) * | 1991-06-18 | 1992-12-22 | Mitsubishi Materials Corp | Lcフィルタ |
JP2000164431A (ja) * | 1998-11-25 | 2000-06-16 | Tokin Corp | インダクタ |
Also Published As
Publication number | Publication date |
---|---|
EP1833165B1 (en) | 2009-06-10 |
US20080122556A1 (en) | 2008-05-29 |
KR100875370B1 (ko) | 2008-12-22 |
CN101088215A (zh) | 2007-12-12 |
EP1833165A1 (en) | 2007-09-12 |
JP3861914B2 (ja) | 2006-12-27 |
CN101088215B (zh) | 2010-10-27 |
US7605677B2 (en) | 2009-10-20 |
DE602005014889D1 (de) | 2009-07-23 |
EP1833165A4 (en) | 2008-03-12 |
ATE433618T1 (de) | 2009-06-15 |
KR20070073985A (ko) | 2007-07-10 |
JP2006211644A (ja) | 2006-08-10 |
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