WO2016079903A1 - コモンモードノイズフィルタ - Google Patents
コモンモードノイズフィルタ Download PDFInfo
- Publication number
- WO2016079903A1 WO2016079903A1 PCT/JP2015/003162 JP2015003162W WO2016079903A1 WO 2016079903 A1 WO2016079903 A1 WO 2016079903A1 JP 2015003162 W JP2015003162 W JP 2015003162W WO 2016079903 A1 WO2016079903 A1 WO 2016079903A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil conductor
- common mode
- coil
- conductor
- mode noise
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 276
- 239000012212 insulator Substances 0.000 claims description 78
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 239000000696 magnetic material Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000007747 plating Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- 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
-
- 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
- H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
- H03H7/425—Balance-balance networks
- H03H7/427—Common-mode filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0073—Printed inductances with a special conductive pattern, e.g. flat spiral
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F2017/0093—Common mode choke coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
-
- 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
- H03H2001/0021—Constructional details
- H03H2001/0085—Multilayer, e.g. LTCC, HTCC, green sheets
-
- 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
- H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
Definitions
- the present invention relates to a small and thin common mode noise filter used for various electronic devices such as digital devices, AV devices, and information communication terminals.
- FIG. 11 is an exploded perspective view of a conventional common mode noise filter.
- the conventional common mode noise filter includes a plurality of insulator layers 1a to 1g and includes a first coil 2 and a second coil 3.
- the first coil 2 is configured by connecting a spiral first coil conductor 4a and a second coil conductor 4b.
- the second coil 3 is configured by connecting a spiral third coil conductor 5a and a fourth coil conductor 5b.
- Coil conductors (first coil conductor 4a, second coil conductor 4b) constituting the first coil 2 and coil conductors (third coil conductor 5a, fourth coil conductor) constituting the second coil 3 5b) are alternately arranged.
- the first common mode filter unit 6 is formed by magnetically coupling the first coil conductor 4a and the third coil conductor 5a. Further, the second common mode filter portion 7 is formed by magnetically coupling the second coil conductor 4b and the fourth coil conductor 5b. By connecting the first common mode filter unit 6 and the second common mode filter unit 7 in series, the conventional common mode noise filter ensures high common mode impedance and removes common mode noise.
- Patent Document 1 is known as prior art document information related to the invention of this application.
- the common mode noise filter of one embodiment of the present invention includes a plurality of laminated insulator layers, a spiral first coil conductor, and a spiral second coil conductor formed on the plurality of insulator layers. And a second coil formed on a plurality of insulator layers and configured by a spiral third coil conductor and a spiral fourth coil conductor. Further, (1) the first to fourth coil conductors are arranged so that the first coil and the second coil are alternately arranged, or (2) the third coil conductor and the fourth coil are arranged. The coil conductors are arranged so as to be sandwiched between the first coil conductor and the second coil conductor.
- first coil conductor and the third coil conductor are magnetically coupled to form a first common mode filter portion
- second coil conductor and the fourth coil conductor are magnetically coupled to form a second common mode.
- a filter portion is formed.
- first common mode filter unit and the second common mode filter unit are connected in series. Furthermore, in a top view, the first direction in which current flows through the first coil conductor and the third coil conductor in the first common mode filter section, and the second coil conductor and the second coil conductor in the second common mode filter section.
- the second direction in which current flows through the coil conductor 4 is set in the opposite direction.
- the common mode noise filter of one embodiment of the present invention can attenuate common mode noise in two frequency bands.
- FIG. 1 is an exploded perspective view of a common mode noise filter according to Embodiment 1.
- FIG. 1 The perspective view of the common mode noise filter in Embodiment 1 Circuit schematic diagram of common mode noise filter according to Embodiment 1
- the figure which compared the common mode noise characteristic in Embodiment 1 and the common mode noise characteristic of the conventional common mode noise filter Exploded perspective view of a modification of the common mode noise filter in the first embodiment
- Exploded perspective view of a common mode noise filter in the second embodiment Exploded perspective view of a modification of the common mode noise filter in the second embodiment
- the figure which compared the mode conversion characteristic of the common mode noise filter in Embodiment 1 Exploded perspective view of a common mode noise filter in the third embodiment Exploded perspective view of a conventional common mode noise filter
- WiFi has been installed not only on portable information terminals but also on TVs and the like, and noise filters that suppress radiation noise from internal circuits are used to ensure the reception sensitivity.
- noise filters that suppress radiation noise from internal circuits are used to ensure the reception sensitivity.
- a common mode noise filter having a high common mode noise attenuation in, for example, two frequency bands near 2.4 GHz and 5 GHz is desired.
- the common mode noise filter according to the present embodiment can attenuate common mode noise in two frequency bands.
- FIG. 1 is an exploded perspective view of a common mode noise filter according to the first embodiment of the present invention
- FIG. 2 is a perspective view of the common mode noise filter according to the first embodiment of the present invention
- FIG. 3 is a first embodiment according to the present invention. It is a circuit schematic diagram of a common mode noise filter.
- insulator layers 11a to 11g are laminated in order from the bottom.
- the common mode noise filter according to the present embodiment includes a plurality of laminated insulator layers (insulator layers 11a to 11g), a plurality of insulator layers, and a spiral first coil conductor 14 and a spiral shape.
- the first coil 12 is composed of the second coil conductor 15. Furthermore, it has the 2nd coil 13 formed in the some insulator layer and comprised by the spiral 3rd coil conductor 16 and the spiral 4th coil conductor 17.
- the 1st coil conductor 14, the 2nd coil conductor 15, the 3rd coil conductor 16, and the 4th coil conductor are arranged so that the 1st coil 12 and the 2nd coil 13 may be arranged alternately. 17 is arranged. Specifically, the first coil conductor 14, the third coil conductor 16, the second coil conductor 15, and the fourth coil conductor 17 are arranged in order from the top.
- the first common mode filter portion 18 is formed by magnetically coupling the first coil conductor 14 and the third coil conductor 16.
- the second common mode filter unit 19 is formed by magnetically coupling the second coil conductor 15 and the fourth coil conductor 17.
- the first common mode filter unit 18 and the second common mode filter unit 19 are connected in series.
- the first direction in which current flows through the first coil conductor 14 and the third coil conductor 16 in the first common mode filter unit 18 and the second direction in the second common mode filter unit 19 The second direction in which current flows through the coil conductor 15 and the fourth coil conductor 17 is set in the opposite direction. Details of the winding direction of the first to fourth coil conductors 14 to 17 will be described later.
- the number of turns of the first coil conductor 14 and the third coil conductor 16 in the first common mode filter unit 18 and the number of turns in the second common mode filter unit 19 are described.
- the number of turns of the second coil conductor 15 and the fourth coil conductor 17 is made different.
- the number of turns of the first coil conductor 14 and the third coil conductor 16 in the first common mode filter unit 18 is 3, and the second coil conductor in the second common mode filter unit 19 is three.
- the number of turns of each of the 15 and the fourth coil conductors 17 is one. That is, in the present embodiment, the number of turns of the first coil conductor 14 and the third coil conductor 16 in the first common mode filter unit 18 is the second coil conductor 15 in the second common mode filter unit 19. More than the number of turns of the fourth coil conductor 17.
- the “number of turns” means the number of complete turns, and the fraction is rounded down.
- the insulator layers 11a to 11g are laminated in order from the bottom.
- the insulating layers 11b to 11f are formed in a sheet shape from a non-magnetic material, for example, an insulating nonmagnetic material such as Cu—Zn ferrite or glass ceramic.
- the insulator layers 11a and 11g are formed in a sheet shape from an insulating magnetic material such as Cu—Ni—Zn ferrite. Note that all the insulator layers 11a to 11g may be made of a nonmagnetic material.
- first and second coils 12 and 13 are formed inside the insulator layers 11b to 11f, and the first coil 12 is connected to the spiral first coil conductor 14 and the spiral second coil.
- the coil conductor 15 is used, and the second coil 13 is formed of a spiral third coil conductor 16 and a spiral fourth coil conductor 17.
- the first to fourth coil conductors 14 to 17 are each formed by spirally plating or printing a conductive material such as silver.
- the first coil conductor 14 is on the top surface of the insulator layer 11e
- the second coil conductor 15 is on the top surface of the insulator layer 11c
- the third coil conductor 16 is on the top surface of the insulator layer 11d
- the fourth coil conductor. 17 are formed on the upper surface of the insulator layer 11b.
- the first and second coil conductors 14 and 15 constituting the first coil 12 and the third and fourth coil conductors 16 and 17 constituting the second coil 13 are alternately laminated.
- the first to fourth coil conductors 14 to 17 are stacked in the vertical direction, space saving can also be realized.
- the first coil conductor 14 and a part of the third coil conductor 16 are arranged at substantially the same position in a top view, and are magnetically coupled by setting the direction of current flow to be the same direction.
- the common mode filter portion 18 is formed.
- a part of the second coil conductor 15 and the fourth coil conductor 17 are arranged at substantially the same position in a top view, and the second direction is made magnetically coupled by making the direction of current flow the same direction.
- the common mode filter portion 19 is formed.
- the number of turns (number of turns) of the first and third coil conductors 14 and 16 in the first common mode filter unit 18 is the same as that of the second and fourth coil conductors 15 in the second common mode filter unit 19. , 17 turns (number of turns).
- the first to fourth coil conductors 14 to 17 have substantially the same inter-conductor pitch, and the second and fourth coil conductors 15 and 17 are the upper surfaces of the first and third coil conductors 14 and 16, respectively. Opposite visually.
- the number of turns of the second and fourth coil conductors 15 and 17 is preferably 1/3 to 2/3 of the number of turns of the first and third coil conductors 14 and 16.
- the outermost portions of the second and fourth coil conductors 15 and 17 are opposed to the outermost portions of the first and third coil conductors 14 and 16 according to desired characteristics.
- the innermost portions of the second and fourth coil conductors 15 and 17 may be opposed to the innermost portions of the first and third coil conductors 14 and 16. May be.
- first coil conductor 14 and the second coil conductor 15 are connected to each other via the first via electrodes 20a formed in the insulator layers 11d and 11e, respectively. Composed. Furthermore, the third coil conductor 16 and the fourth coil conductor 17 are connected to each other via the second via electrodes 20b formed in the insulator layers 11c and 11d, so that the second coil 13 is connected. Composed.
- first via electrode 20a formed in the insulator layer 11d and the first via electrode 20a formed in the insulator layer 11e are provided at the same position in a top view.
- second via electrode 20b formed in the insulator layer 11c and the second via electrode 20b formed in the insulator layer 11d are also provided at the same position in a top view.
- the first via electrode 20a and the second via electrode 20b are formed by making holes in predetermined portions of each insulator layer with a laser and filling the holes with silver.
- the insulator layer is composed of the insulator layers 11a to 11g (seven sheets).
- the number of the insulator layers 11a to 11g is the number shown in FIG. It is not limited to.
- first and fourth external electrodes 22a to 22d are provided on both end faces of the main body 21, and the first to fourth external electrodes 22a to 22d are respectively connected to the first to fourth coil conductors 14 to 14 respectively. 17 is connected. Further, the first to fourth external electrodes 22 a to 22 d are formed by printing silver on the end surface of the main body 21.
- a nickel plating layer is formed on the surface of the first to fourth external electrodes 22a to 22d by plating, and a low melting point metal plating layer such as tin or solder is formed on the surface of the nickel plating layer.
- the direction in which current flows in the first and third coil conductors 14 and 16 in the first common mode filter unit 18, and the second The common mode filter unit 19 is formed so that the directions in which the currents of the second and fourth coil conductors 15 and 17 flow are opposite to each other.
- the number of turns of the first and third coil conductors 14 and 16 in the first common mode filter unit 18 and the number of turns of the second and fourth coil conductors 15 and 17 in the second common mode filter unit 19 are more preferable. Since the number of turns is different, different frequency characteristics are generated in the first common mode filter unit 18 and the second common mode filter unit 19, so that when common mode noise enters, A common mode noise attenuation can be obtained in the frequency band.
- first common mode filter unit 18 and the second common mode filter unit 19 since the first common mode filter unit 18 and the second common mode filter unit 19 generate magnetic fluxes in opposite directions, the first common mode filter unit 18 and the second common mode filter unit as in the prior art. There is no magnetic coupling that 19 strengthens each other. Accordingly, since different frequency characteristics are generated in the first common mode filter unit 18 and the second common mode filter unit 19, an effect of obtaining common mode noise attenuation in two frequency bands is obtained.
- FIG. 4 is a diagram comparing the common mode attenuation characteristics of the common mode noise filter according to Embodiment 1 of the present invention and the conventional common mode noise filter.
- the insulator layers 11e and 11f are formed of both the first and third coil conductors 14 and 16 of the first to fourth coil conductors 14 to 17, or Touch only one of them.
- the insulator layers 11b and 11c (second insulator layer) are in contact with both or only one of the second and fourth coil conductors 15 and 17 in the second common mode filter unit 19. It is more preferable if the dielectric constants of the insulator layers 11e and 11f are different from the dielectric constants of the insulator layers 11b and 11c. Different frequency characteristics are generated in the first common mode filter unit 18 and the second common mode filter unit 19 due to the difference in dielectric constant, so that attenuation can be obtained in two frequency bands. Since the insulator layer 11d is in contact with both the coil conductors of the third coil conductor 16 constituting the first common mode filter section 18 and the second coil conductor 15 constituting the second common mode filter section 19, Not applicable.
- the second and fourth coils in the second common mode filter section 19 having a smaller number of turns than the first and third coil conductors 14 and 16 in the first common mode filter section 18 are used.
- the magnetic body (insulator layer 11a) may not be formed outside (downward) in the stacking direction. That is, the magnetic body 11g is formed only on the side where the coil conductors (the first and third coil conductors 14 and 16) having a large number of turns are formed on the upper side and the lower side of the plurality of insulator layers. ing.
- FIG. 6 and 7 are exploded perspective views of the common mode noise filter according to the second embodiment of the present invention.
- the same components as those in the first embodiment of the present invention described above are denoted by the same reference numerals and description thereof is omitted.
- the second embodiment of the present invention is different from the first embodiment of the present invention described above in the following points.
- the only difference is the order in which the second coil conductor 15 and the fourth coil conductor 17 are stacked. As the order in which the second coil conductor 15 and the fourth coil conductor 17 are stacked is changed, the manner in which the coil conductor is routed is slightly different between the first embodiment and the second embodiment.
- the third coil conductor 16 and the fourth coil conductor 17 constituting the second coil 13 are connected to the first coil conductor 14 constituting the first coil 12 and the second coil conductor 17. It arrange
- circuit schematic diagram of the common mode noise filter in the second embodiment is the same as the circuit schematic diagram of the first embodiment of the present invention shown in FIG.
- the common mode noise filter of the second embodiment configured as described above, since the adjacent third coil conductor 16 and fourth coil conductor 17 constitute the second coil 13, the same potential. It becomes. Therefore, between the first common mode filter unit 18 and the second common mode filter unit 19 (particularly, the third coil conductor 16 constituting the first common mode filter unit 18 and the second common mode filter unit). The stray capacitance between the fourth coil conductors 17 constituting 19) is reduced. Therefore, even if a differential signal is input, the signal flowing through the first common mode filter unit 18 and the second common mode filter unit 19 can be prevented from being deteriorated due to stray capacitance therebetween.
- the differential signal balance is improved in each of the first common mode filter unit 18 and the second common mode filter unit 19. As a result, not only can attenuation be obtained in the two frequency bands, but the rate at which the input differential signal component is converted to the common mode and output is reduced, and the loss of the differential signal deteriorates. Also disappear.
- the entire length of the coil conductors 14 and 15 constituting the first coil 12 (the line length of the first coil 12) and the second coil 13 are constituted. It is preferable that the entire lengths of the coil conductors 16 and 17 (the line length of the second coil 13) be substantially the same.
- the conventional common mode filter shown in FIG. 11 may generate common mode noise when the differential signal passes through the common mode filter.
- the wireless functions such as WiFi installed in smartphones and personal computers have a communication frequency band of 2.4 GHz band and 5 GHz band, and if the differential signal has frequency components from 2.4 GHz to 5 GHz, the difference A part of the moving signal component is converted to a common mode noise of 2.4 GHz to 5 GHz.
- the common mode noise deteriorates the reception sensitivity of wireless functions such as WiFi. Therefore, it is necessary to suppress the rate at which the differential signal component is converted into common mode noise as much as possible, and the common mode noise filter of the present invention exhibits a very effective function in this respect.
- the graphs shown in the first embodiment have the same line lengths of the first coil 12 and the second coil 13 in the first embodiment described with reference to FIG. It is the result measured under the condition.
- the graph shown in the first embodiment (condition 2) is a result of measurement under the condition that the line lengths of the first coil 12 and the second coil 13 are different.
- the graph shown in the second embodiment is a result of measurement under the condition that the line lengths of the first coil 12 and the second coil 13 in the second embodiment described with reference to FIG. 6 are the same.
- FIG. 8 is a diagram comparing differential signal loss under the three conditions described above.
- FIG. 9 is a diagram comparing the mode conversion characteristics from the differential mode to the common mode under the three conditions described above.
- the common mode noise filter according to the second embodiment of the present invention is different when the line lengths of the first coil 12 and the second coil 13 are different from each other in the first embodiment of the present invention.
- the loss of the differential signal is not deteriorated in the high-frequency region as compared with either case. It can be seen that the rate at which the dynamic signal component is converted to the common mode is also low.
- the line lengths of the first coil 12 and the second coil 13 are the same than when the line lengths of the first coil 12 and the second coil 13 are different.
- the third coil conductor 16 and the fourth coil conductor 17 constituting the second coil 13 are replaced with the first coil conductor 14 and the second coil constituting the first coil 12.
- the first coil conductor 14 and the second coil conductor are arranged so that the first coil 12 and the second coil 13 are alternately arranged as shown in FIG. 15 is more preferable than arranging the third coil conductor 16 and the fourth coil conductor 17 in that the conversion to the common mode of the differential signal component is suppressed.
- the thickness of the insulator layer 11d (third insulator layer) located between the first common mode filter portion 18 and the second common mode filter portion 19 is made thicker than the thicknesses of the other insulator layers. May be.
- the insulator layer 11d may be formed of a plurality of insulator layers. At this time, a plurality of insulator layers are collectively used as an insulator layer 11d. The total thickness of the plurality of insulator layers forming the insulator layer 11d is determined as the thickness of the insulator layer positioned between the first common mode filter portion 18 and the second common mode filter portion 19 (third The thickness of the insulator layer).
- the dielectric constant of the insulator layer 11d (third insulator layer) located between the first common mode filter section 18 and the second common mode filter section 19 is set to be higher than the dielectric constant of other insulator layers. It may be small.
- the stray capacitance between the first common mode filter unit 18 and the second common mode filter unit 19 is reduced. Signals flowing through the mode filter unit 18 and the second common mode filter unit 19 can suppress deterioration due to stray capacitance therebetween. Therefore, the differential signal balance is improved in each of the first common mode filter unit 18 and the second common mode filter unit 19, the loss of the differential signal is not deteriorated, and the input differential signal The ratio of components converted to common mode noise and output is reduced.
- Embodiment 3 A common mode noise filter according to Embodiment 3 of the present invention will be described below with reference to the drawings.
- FIG. 10 is an exploded perspective view of the common mode noise filter according to the third embodiment of the present invention.
- components having the same configurations as those of the first and second embodiments described above are denoted by the same reference numerals and description thereof is omitted.
- the third embodiment is different from the second embodiment described with reference to FIG. 6 in that a fifth coil conductor is provided between the first common mode filter unit 18 and the second common mode filter unit 19.
- the third common mode filter unit 25 is formed of the second coil conductor 23 and the sixth coil conductor 24.
- the first coil conductor 14 and the second coil conductor 15 are connected via the fifth coil conductor 23.
- the third coil conductor 16 and the fourth coil conductor 17 are connected via the sixth coil conductor 24.
- the direction in which the current flows through the fifth coil conductor 23 and the sixth coil conductor 24 in the third common mode filter unit 25 is the same as the first coil conductor 14 and the third coil conductor in the first common mode filter unit 18.
- the direction in which the current flows through 16 is set to be opposite. Since the fifth coil conductor 23 is connected to the first coil conductor 14 and the second coil conductor 15, it constitutes a part of the first coil 12. Further, since the sixth coil conductor 24 is connected to the third coil conductor 16 and the fourth coil conductor 17, it constitutes a part of the second coil 13.
- the common mode noise filter of the present embodiment includes the third common mode noise filter unit 25 having the fifth coil conductor 23 and the sixth coil conductor 24. And between the 1st common mode filter part 18 and the 2nd common mode filter part 19, the 5th coil conductor 23 which forms the 1st coil 12, and the 6th coil which forms the 2nd coil 13 A conductor 24 is disposed. The first coil conductor 14 and the second coil conductor 15 are connected via the fifth coil conductor 23. The third coil conductor 16 and the fourth coil conductor 17 are connected via the sixth coil conductor 24.
- the first coil conductor 14 and the second coil conductor 15 are provided on the outer sides of the first via electrode 20a, the fifth coil conductor 23, and the fifth and sixth coil conductors 23 and 24, respectively. 3 via electrodes 20c and the routing conductor 26a.
- the third coil conductor 16 and the fourth coil conductor 17 include a second via electrode 20 b, a sixth coil conductor 24, and a fourth via electrode 20 d located outside the sixth coil conductor 24. And the routing conductor 26b.
- the fifth coil conductor 23 is formed on the upper surface of the insulator layer 11j
- the sixth coil conductor 24 is formed on the upper surface of the insulator layer 11i
- the routing conductors 26a and 26b are the upper surfaces of the insulator layer 11h. Formed.
- the coil conductors constituting the first coil 12 can be adjusted.
- the overall length can be made substantially the same as the overall length of the coil conductor constituting the second coil 13.
- the fifth coil conductor 23 is formed as a part of the first coil 12. (See FIG. 3 and FIG. 10. Note that the fifth coil conductor 23 is not shown in FIG. 3.)
- the fifth coil conductor 23 is connected to the second coil conductor 15 via the third via electrode 20c. Connected to.
- the third via electrode 20c is provided in the vicinity of the second external electrode 22b connected to the first coil 12 including the fifth coil conductor 23 as a part.
- the sixth coil conductor 24 is formed as a part of the second coil 13. (See FIG. 3 and FIG. 10. Note that the sixth coil conductor 24 is not shown in FIG. 3.)
- the sixth coil conductor 24 is connected to the fourth coil conductor 17 via the fourth via electrode 20d. Connected to.
- the fourth via electrode 20d is provided in the vicinity of the third external electrode 22c connected to the second coil 13 including the sixth coil conductor 24 as a part.
- the third via electrode 20c is provided in the vicinity of the second external electrode 22b, but may be provided in the vicinity of the first external electrode 22a.
- the fourth via electrode 20d is provided in the vicinity of the third external electrode 22c, but may be provided in the vicinity of the fourth external electrode 22d.
- the third via electrode 20c and the fourth via electrode 20d are formed in the vicinity of the external electrode having the same potential, so that the fifth coil conductor 23, the sixth coil conductor 24, and the external electrode Insulation reliability can be secured.
- connection between the fifth coil conductor 23 and the first coil conductor 14 and the connection between the fifth coil conductor 23 and the second coil conductor 15 are: These are performed by via electrodes 20a and 20c, respectively. Further, the connection between the sixth coil conductor 24 and the third coil conductor 16 and the connection between the sixth coil conductor 24 and the fourth coil conductor 17 are made by via electrodes 20b and 20d, respectively. . At least a portion of the via electrodes 20a and 20c connected to the fifth coil conductor 23 is provided in the vicinity of the external electrode 22a or the external electrode 22b to which the first coil 12 is connected. Furthermore, at least a part of the via electrodes 20b and 20d connected to the sixth coil conductor 24 is provided in the external electrode 22c to which the second coil 13 is connected or in the vicinity of the external electrode 22d.
- the first mode coil 12 and the second mode coil 13 are provided. It is good also as a type.
- a magnetic part may be formed in the central part of the insulator layers 11b to 11f.
- the common mode noise filter according to the present invention can obtain attenuation in two frequency bands.
- it is useful in a small and thin common mode noise filter used as a noise countermeasure for various electronic devices such as digital devices, AV devices, and information communication terminals.
- Insulator layer 12 1st coil 13 2nd coil 14 1st coil conductor 15 2nd coil conductor 16 3rd coil conductor 17 4th coil conductor 18 1st common mode filter part 19 1st 2 common mode filter part 23 5th coil conductor 24 6th coil conductor 25 3rd common mode filter part
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Filters And Equalizers (AREA)
Abstract
Description
以下、本発明の実施の形態1によるコモンモードノイズフィルタについて図1~図3を参照しながら説明する。
以下、本発明の実施の形態2によるコモンモードノイズフィルタについて図面を参照しながら説明する。
次に、線路長が異なる場合を比較した結果を図8、図9を参照しながら説明する。
以下、本発明の実施の形態3によるコモンモードノイズフィルタについて図面を参照しながら説明する。
12 第1のコイル
13 第2のコイル
14 第1のコイル導体
15 第2のコイル導体
16 第3のコイル導体
17 第4のコイル導体
18 第1のコモンモードフィルタ部
19 第2のコモンモードフィルタ部
23 第5のコイル導体
24 第6のコイル導体
25 第3のコモンモードフィルタ部
Claims (9)
- 積層された複数の絶縁体層と、
前記複数の絶縁体層に形成され、渦巻状の第1のコイル導体および渦巻状の第2のコイル導体で構成される第1のコイルと、
前記複数の絶縁体層に形成され、渦巻状の第3のコイル導体および渦巻状の第4のコイル導体で構成される第2のコイルと、
を備え、
(1)前記第1のコイルと、前記第2のコイルが交互に配置されるように、前記第1のコイル導体、前記第2のコイル導体、前記第3のコイル導体、および前記第4のコイル導体は配置される、
または、
(2)前記第3のコイル導体および前記第4のコイル導体が、前記第1のコイル導体と前記第2のコイル導体で挟まれるように配置される、
のうちいずれかのように配置され、
前記第1のコイル導体と前記第3のコイル導体を磁気結合させて第1のコモンモードフィルタ部が形成され、
前記第2のコイル導体と前記第4のコイル導体を磁気結合させて第2のコモンモードフィルタ部が形成され、
前記第1のコモンモードフィルタ部と前記第2のコモンモードフィルタ部が直列に接続され、
上面視で、前記第1のコモンモードフィルタ部における前記第1のコイル導体および前記第3のコイル導体に電流が流れる第1の方向と、前記第2のコモンモードフィルタ部における前記第2のコイル導体および前記第4のコイル導体に電流が流れる第2の方向とを、逆方向にしたコモンモードノイズフィルタ。 - 前記第1のコモンモードフィルタ部における前記第1のコイル導体および前記第3のコイル導体の巻き数と、前記第2のコモンモードフィルタ部における前記第2のコイル導体および前記第4のコイル導体の巻き数とを、異なるようにした請求項1に記載のコモンモードノイズフィルタ。
- 前記複数の絶縁体層は、第1の絶縁体層および第2の絶縁体層を有し、
前記第1の絶縁体層は、前記第1~第4のコイル導体のうち、前記第1のコイル導体および前記第3のコイル導体の両方またはいずれか一方のみに接し、
前記第2の絶縁体層は、前記第1~第4のコイル導体のうち、前記第2のコイル導体および前記第4のコイル導体の両方またはいずれか一方のみに接し、
前記第1の絶縁体層の誘電率と、前記第2の絶縁体層の誘電率とを異なるようにした請求項1に記載のコモンモードノイズフィルタ。 - 前記複数の絶縁体層の上方側および下方側のうち、コイル導体の巻き数が多いコイル導体が形成されている側だけに、磁性体が形成されている請求項2に記載のコモンモードノイズフィルタ。
- 前記第1のコイルを構成するコイル導体の全体の長さと、前記第2のコイルを構成するコイル導体の全体の長さとを、実質的に同一にした請求項1に記載のコモンモードノイズフィルタ。
- 前記複数の絶縁体層が、第3の絶縁体層を有し、
前記第3の絶縁体層は、前記第1のコモンモードフィルタ部と前記第2のコモンモードフィルタ部の間に位置し、
前記第3の絶縁体層の厚みは、前記複数の絶縁体層のうち他の絶縁体層の厚みより厚くした請求項1に記載のコモンモードノイズフィルタ。 - 前記複数の絶縁体層が、第3の絶縁体層を有し、
前記第3の絶縁体層は、前記第1のコモンモードフィルタ部と前記第2のコモンモードフィルタ部の間に位置し、
前記第3の絶縁体層の誘電率を、前記複数の絶縁体層のうち他の絶縁体層の誘電率より小さくした請求項1に記載のコモンモードノイズフィルタ。 - 第5のコイル導体および第6のコイル導体を有する第3のコモンモードノイズフィルタ部を更に備え、
前記第1のコモンモードフィルタ部と前記第2のコモンモードフィルタ部の間に、前記第1のコイルを形成する前記第5のコイル導体と前記第2のコイルを形成する前記第6のコイル導体が配置され、
前記第5のコイル導体を介して前記第1のコイル導体と前記第2のコイル導体は接続され、
前記第6のコイル導体を介して前記第3のコイル導体と前記第4のコイル導体は接続された請求項1に記載のコモンモードノイズフィルタ。 - 前記第5のコイル導体と前記第1のコイル導体との接続、および、前記第5のコイル導体と前記第2のコイル導体との接続は、それぞれビア電極によって行われ、
前記第6のコイル導体と前記第3のコイル導体との接続、および、前記第6のコイル導体と前記第4のコイル導体との接続は、それぞれビア電極によって行われ、
前記第5のコイル導体と接続する前記ビア電極の少なくとも一部は、前記第1のコイルが接続された外部電極近傍に設け、
前記第6のコイル導体と接続する前記ビア電極の少なくとも一部は、前記第2のコイルが接続された外部電極近傍に設けた請求項8に記載のコモンモードノイズフィルタ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580061018.5A CN107155366B (zh) | 2014-11-18 | 2015-06-24 | 共模噪声滤波器 |
JP2016559784A JP6515353B2 (ja) | 2014-11-18 | 2015-06-24 | コモンモードノイズフィルタ |
US15/525,491 US10147534B2 (en) | 2014-11-18 | 2015-06-24 | Common mode noise filter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-233250 | 2014-11-18 | ||
JP2014233250 | 2014-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016079903A1 true WO2016079903A1 (ja) | 2016-05-26 |
Family
ID=56013484
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/003162 WO2016079903A1 (ja) | 2014-11-18 | 2015-06-24 | コモンモードノイズフィルタ |
Country Status (4)
Country | Link |
---|---|
US (1) | US10147534B2 (ja) |
JP (1) | JP6515353B2 (ja) |
CN (1) | CN107155366B (ja) |
WO (1) | WO2016079903A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6234614B1 (ja) * | 2016-05-31 | 2017-11-22 | 新電元工業株式会社 | コイル構造体及び磁性部品 |
WO2018051798A1 (ja) * | 2016-09-13 | 2018-03-22 | パナソニックIpマネジメント株式会社 | コモンモードノイズフィルタ |
US10116280B2 (en) | 2015-07-20 | 2018-10-30 | Samsung Electro-Mechanics Co., Ltd. | Coil component |
US10410784B2 (en) | 2016-05-31 | 2019-09-10 | Shindengen Electric Manufacturing Co., Ltd. | Magnetic component |
JP2020025046A (ja) * | 2018-08-08 | 2020-02-13 | 株式会社村田製作所 | コモンモードチョークコイル |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6388096B2 (ja) * | 2016-07-15 | 2018-09-12 | 株式会社村田製作所 | 高周波トランスおよび移相器 |
CN111081463B (zh) * | 2018-10-19 | 2021-01-26 | 立锜科技股份有限公司 | 具有降低噪声功能的传输接口 |
JPWO2020110692A1 (ja) * | 2018-11-30 | 2021-10-14 | パナソニックIpマネジメント株式会社 | コモンモードノイズフィルタ |
CN111865260A (zh) * | 2019-04-24 | 2020-10-30 | 珠海格力电器股份有限公司 | 滤波器布局结构、滤波器和电子设备 |
WO2021010309A1 (ja) * | 2019-07-17 | 2021-01-21 | パナソニックIpマネジメント株式会社 | コモンモードノイズフィルタ |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09270332A (ja) * | 1996-03-29 | 1997-10-14 | Tokin Corp | 電子部品 |
JP2006286934A (ja) * | 2005-03-31 | 2006-10-19 | Taiyo Yuden Co Ltd | コモンモードチョークコイル |
JP2010124270A (ja) * | 2008-11-20 | 2010-06-03 | Panasonic Corp | ノイズフィルタ |
JP2013098279A (ja) * | 2011-10-31 | 2013-05-20 | Panasonic Corp | コモンモードノイズフィルタ |
JP2013191660A (ja) * | 2012-03-13 | 2013-09-26 | Panasonic Corp | コモンモードノイズフィルタ |
JP2014175825A (ja) * | 2013-03-08 | 2014-09-22 | Panasonic Corp | コモンモードノイズフィルタ |
CN203931711U (zh) * | 2013-06-21 | 2014-11-05 | 松下电器产业株式会社 | 共模噪声滤波器 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002373810A (ja) | 2001-06-14 | 2002-12-26 | Tdk Corp | チップ型コモンモードチョークコイル |
TW201106386A (en) * | 2009-08-03 | 2011-02-16 | Inpaq Technology Co Ltd | Common mode filter and method of manufacturing the same |
US9269487B2 (en) * | 2011-09-15 | 2016-02-23 | Panasonic Intellectual Property Management Co., Ltd. | Common mode noise filter and production method therefor |
JP2013131578A (ja) * | 2011-12-20 | 2013-07-04 | Taiyo Yuden Co Ltd | 積層コモンモードチョークコイル |
WO2013099540A1 (ja) * | 2011-12-27 | 2013-07-04 | 株式会社村田製作所 | 積層型コモンモードチョークコイル |
JP2014194980A (ja) * | 2013-03-28 | 2014-10-09 | Taiyo Yuden Co Ltd | 積層型電子部品及びその製造方法 |
-
2015
- 2015-06-24 US US15/525,491 patent/US10147534B2/en active Active
- 2015-06-24 WO PCT/JP2015/003162 patent/WO2016079903A1/ja active Application Filing
- 2015-06-24 CN CN201580061018.5A patent/CN107155366B/zh active Active
- 2015-06-24 JP JP2016559784A patent/JP6515353B2/ja active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09270332A (ja) * | 1996-03-29 | 1997-10-14 | Tokin Corp | 電子部品 |
JP2006286934A (ja) * | 2005-03-31 | 2006-10-19 | Taiyo Yuden Co Ltd | コモンモードチョークコイル |
JP2010124270A (ja) * | 2008-11-20 | 2010-06-03 | Panasonic Corp | ノイズフィルタ |
JP2013098279A (ja) * | 2011-10-31 | 2013-05-20 | Panasonic Corp | コモンモードノイズフィルタ |
JP2013191660A (ja) * | 2012-03-13 | 2013-09-26 | Panasonic Corp | コモンモードノイズフィルタ |
JP2014175825A (ja) * | 2013-03-08 | 2014-09-22 | Panasonic Corp | コモンモードノイズフィルタ |
CN203931711U (zh) * | 2013-06-21 | 2014-11-05 | 松下电器产业株式会社 | 共模噪声滤波器 |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10116280B2 (en) | 2015-07-20 | 2018-10-30 | Samsung Electro-Mechanics Co., Ltd. | Coil component |
JP6234614B1 (ja) * | 2016-05-31 | 2017-11-22 | 新電元工業株式会社 | コイル構造体及び磁性部品 |
NL2018997A (en) * | 2016-05-31 | 2017-12-04 | Shindengen Electric Mfg | Coil structure and magnetic component |
WO2017208332A1 (ja) * | 2016-05-31 | 2017-12-07 | 新電元工業株式会社 | コイル構造体及び磁性部品 |
CN107667407A (zh) * | 2016-05-31 | 2018-02-06 | 新电元工业株式会社 | 线圈构造体以及磁性部件 |
CN107667407B (zh) * | 2016-05-31 | 2019-06-04 | 新电元工业株式会社 | 线圈构造体以及磁性部件 |
US10410784B2 (en) | 2016-05-31 | 2019-09-10 | Shindengen Electric Manufacturing Co., Ltd. | Magnetic component |
US10748700B2 (en) | 2016-05-31 | 2020-08-18 | Shindengen Electric Manufacturing Co., Ltd. | Coil structure and magnetic component |
WO2018051798A1 (ja) * | 2016-09-13 | 2018-03-22 | パナソニックIpマネジメント株式会社 | コモンモードノイズフィルタ |
JP2018046081A (ja) * | 2016-09-13 | 2018-03-22 | パナソニックIpマネジメント株式会社 | コモンモードノイズフィルタ |
US10778177B2 (en) | 2016-09-13 | 2020-09-15 | Panasonic Intellectual Property Management Co., Ltd. | Common mode noise filter |
JP2020025046A (ja) * | 2018-08-08 | 2020-02-13 | 株式会社村田製作所 | コモンモードチョークコイル |
Also Published As
Publication number | Publication date |
---|---|
CN107155366B (zh) | 2019-08-16 |
US20170316869A1 (en) | 2017-11-02 |
JPWO2016079903A1 (ja) | 2017-08-31 |
US10147534B2 (en) | 2018-12-04 |
CN107155366A (zh) | 2017-09-12 |
JP6515353B2 (ja) | 2019-05-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2016079903A1 (ja) | コモンモードノイズフィルタ | |
US10096417B2 (en) | Common mode noise filter | |
JP6303123B2 (ja) | コモンモードノイズフィルタ | |
US9203372B2 (en) | Common mode filter | |
JP6074653B2 (ja) | コモンモードノイズフィルタ | |
JP2012256757A (ja) | Lc複合部品及びlc複合部品の実装構造 | |
JP5961813B2 (ja) | コモンモードノイズフィルタ | |
US10979015B2 (en) | Common-mode choke coil | |
US20190333673A1 (en) | Common mode noise filter | |
JP2013191660A (ja) | コモンモードノイズフィルタ | |
KR20170117375A (ko) | 커먼 모드 노이즈 필터 | |
JP2012195332A (ja) | コモンモードノイズフィルタ | |
JP2017092434A (ja) | コモンモードノイズフィルタ | |
JP5994108B2 (ja) | コモンモードノイズフィルタ | |
JP6273498B2 (ja) | コモンモードノイズフィルタ | |
JP7182037B2 (ja) | コモンモードノイズフィルタ | |
JP6451018B2 (ja) | コモンモードフィルター | |
JP2017188656A (ja) | コモンモードフィルター | |
JP6186591B2 (ja) | コモンモードノイズフィルタ | |
JP2014212189A (ja) | コモンモードノイズフィルタ | |
JP2005347379A (ja) | コモンモードフィルタ | |
JP2020048047A (ja) | コモンモードノイズフィルタ | |
JP6524408B2 (ja) | コモンモードノイズフィルタ | |
JP5909626B2 (ja) | コモンモードノイズフィルタ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15861834 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016559784 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15525491 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15861834 Country of ref document: EP Kind code of ref document: A1 |