JP2019186709A - Composite filter component and power superposition circuits - Google Patents

Abstract

To provide a composite filter component which is the composite filter component in which a common-mode choke coil and two inductors are integrated, can suppress a magnetic coupling between the common-mode choke coil and two inductors, and prevent a magnetic saturation of the common-mode choke coil.SOLUTION: A composite filter component 1 comprises: a common-mode choke coil 20; a first inductor 31; a second inductor 32; and a magnetic body core 10 having a building part 10b provided over an annular shape part 10a and an inner side of the annular shape part 10a. The common-mode choke coil 20 is wound to the building part 10b, and the first inductor 31 is wound to a region containing one connection part 10c1 of the building part 10b and the annular shape part 10a in the annular shape part 10a. The second inductor 32 is wound to the region containing the other connection part 10c2 of the building part 10b and the annular shape part 10a in the annular shape part 10a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite filter component and a power superposition circuit using the composite filter component.

  In recent years, “100Base-T1”, “1000Base-T1”, and the like are known as Ethernet (registered trademark) standards used in in-vehicle networks. There is Power over Data Line (PoDL) as a technique for superimposing power on a signal line used in these Ethernets (registered trademark). In PoDL, since power is superimposed on a differential signal line (differential transmission line), a capacitor and an inductor (Bias-T) are required to separate DC (power) and AC (signal). .

  Here, when a signal and electric power are superimposed using a pair of differential transmission lines, an inductor for Bias-T is required for each of the pair of lines. That is, two inductors are required. At that time, a common mode choke coil for noise suppression is also used. Therefore, if separate parts are used for the common mode choke coil and the two inductors, the number of parts increases and the wiring (circuit pattern) becomes complicated. In addition, when two inductors are used individually, there is a demerit that variation easily occurs and mode conversion is easily caused. Therefore, it is desired to reduce the number of parts and simplify the wiring by integrating the common mode choke coil and the two inductors.

  Here, Patent Document 1 discloses an annular core having first and second winding cores arranged opposite to each other, a first coil and a second coil wound around the first winding core in the same direction. And a third coil and a fourth coil wound in opposite directions around the second core portion are disclosed. According to this filter element, the common mode choke coil composed of the first coil and the second coil, the third coil, and the fourth coil (that is, two inductors) can be integrated.

JP 2007-37034 A

  However, in the filter element described above, a common mode choke coil wound in the same direction and two inductors wound in opposite directions are formed on the annular core. Magnetic coupling occurs between the coil and the two inductors. When the common mode choke coil and the inductor are magnetically coupled, normal mode noise flowing through the inductor becomes common mode noise on the common mode choke coil and may be radiated through the cable. Further, when the above-described filter element is applied to a power superposition circuit such as a PoDL circuit, for example, the common mode choke coil is magnetically saturated by the magnetic field generated by the direct current of the power supply flowing through the inductor, and the common mode choke coil The characteristics may deteriorate.

  The present invention has been made to solve the above-described problems, and suppresses the magnetic coupling between the common mode choke coil and the two inductors in a composite filter component in which the common mode choke coil and the two inductors are integrated. An object of the present invention is to provide a composite filter component capable of preventing magnetic saturation of a common mode choke coil and a power superposition circuit using the composite filter component.

  The composite filter component according to the present invention includes a common mode choke coil formed by winding a pair of wires in the same direction and a pair of wires constituting the common mode choke coil. And a wire having one end electrically connected to the other wire of the pair of wires constituting the common mode choke coil and wound in opposite directions to each other. A magnetic core having a second inductor, an annular portion, and an erected portion provided inside the annular portion, the common mode choke coil being wound around the erected portion, And the second inductor is wound around the region of the annular part including the other connection part between the installation part and the annular part. Being done The features.

  According to the present invention, in a composite filter component in which a common mode choke coil and two inductors are integrated, magnetic coupling between the common mode choke coil and the two inductors can be suppressed, and magnetic saturation of the common mode choke coil can be reduced. It becomes possible to prevent.

It is a top view which shows the structure of the composite filter component which concerns on embodiment. It is a figure for demonstrating the function of the composite filter component which concerns on embodiment. (A) shows a magnetic field generated when a normal mode current flows through the common mode choke coil. (B) shows a magnetic field generated when a common mode current flows through the common mode choke coil. It is a figure for demonstrating the function of the composite filter component which concerns on embodiment. (A) shows a magnetic field generated when a normal mode current flows through the first and second inductors. (B) shows a magnetic field generated when a common mode current flows through the first and second inductors. It is a figure which shows the structure of the PoDL circuit using the composite filter component which concerns on embodiment. FIG. 5 is a circuit diagram of the PoDL circuit shown in FIG. 4. It is a figure which shows the structure of the PoDL circuit using the composite filter component which concerns on a modification.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted.

  First, the configuration of the filter component 1 according to the embodiment will be described with reference to FIG. FIG. 1 is a plan view showing the configuration of the composite filter component 1.

  The composite filter component 1 is a composite filter component in which the common mode choke coil 20 and two inductors (first inductor 31 and second inductor 32) are integrated. The composite filter component 1 mainly includes a magnetic core 10, a common mode choke coil 20 formed by winding a pair of wires in the same direction, and a pair of windings (wires) constituting the common mode choke coil 20. Of the wires 20a and 20b, a wire whose one end is electrically connected to one of the windings 20a and a wire whose one end is electrically connected to the other winding 20b are wound in opposite directions. The first inductor 31, the second inductor 32, and six electrodes (first to sixth electrodes 51 to 56) are provided. Hereinafter, each component will be described in detail.

  The magnetic core 10 is made of ferrite such as Mn—Zn ferrite and Ni—Zn ferrite, for example. The magnetic core 10 has an annular portion 10a and an erected portion 10b provided so as to extend over the inside of the annular portion 10a. The annular portion 10a is formed in a rectangular frame shape, for example. The erection part 10b is formed in a prismatic shape, for example. Moreover, it is preferable that the annular part 10a and the installation part 10b are connected at a substantially right angle.

  The distance between one connection part 10c1 between the annular part 10a and the installation part 10b and the first electrode 51 is equal to the distance between the other connection part 10c2 between the annular part 10a and the installation part 10b and the fourth electrode 54. The distance between the other connecting portion 10c2 of the annular portion 10a and the erected portion 10b and the second electrode 52 is formed between the one connecting portion 10c1 of the annular portion 10a and the erected portion 10b and the third electrode 53. It is formed equal to the distance. At the same time, in the present embodiment, the distance between one connection portion 10c1 between the annular portion 10a and the erection portion 10b and the first electrode 51 is equal to the third connection portion 10c1 between the annular portion 10a and the erection portion 10b. The distance between the second electrode 52 and the other connecting portion 10c2 between the annular portion 10a and the erected portion 10b is equal to the distance from the electrode 53, and the other connecting portion 10c2 between the annular portion 10a and the erected portion 10b. And the fourth electrode 54. That is, one connection portion 10c1 of the installation portion 10b is located at the center (middle) of the first electrode 51 and the third electrode 53, and the other connection portion 10c2 of the installation portion 10b is connected to the second electrode 52. It is located at the center (middle) with the fourth electrode 54.

  The common mode choke coil 20 is formed by winding a pair of windings 20 a and 20 b spirally in the same direction on the installation part 10 b of the magnetic core 10. Here, the “same direction” means that the winding direction of the pair of windings 20a and 20b started from the same side is viewed from the axial direction of the installation part 10b, as suggested by the black circles in FIG. Indicates the same direction. Therefore, when, for example, a common mode current flows through each of the pair of windings 20a and 20b, magnetic flux in the same direction is generated by each of the pair of windings 20a and 20b. For example, unshielded twisted pair cable (UTP) is used for the pair of windings 20a and 20b.

  The first inductor 31 is spirally wound around a region of the annular portion 10a of the magnetic core 10 that includes one connection portion 10c1 between the installation portion 10b and the annular portion 10a. Similarly, the second inductor 32 is spirally wound around a region of the annular portion 10a of the magnetic core 10 that includes the connecting portion 10c2 between the installation portion 10b and the annular portion 10a. The first inductor 31 and the second inductor 32 are wound in opposite directions in the annular portion 10a. Here, the “opposite directions” means that the first inductor 31 and the second inductor 32 (for example, in the example of FIG. The first inductor 31 started to be wound from the first electrode 51 side and the second inductor 32) started to be wound from the sixth electrode 56 side are connected to the first electrode 51 and the third electrode 53 in the axial direction and the second electrode. This indicates that the winding directions of the first inductor 31 and the second inductor 32 are opposite to each other when viewed from the axial direction connecting the line 52 and the fourth electrode 54. Therefore, when a common mode current flows through each of the first inductor 31 and the second inductor 32, magnetic fluxes in opposite directions are generated along the annular portion 10a by the first inductor 31 and the second inductor 32, respectively.

  The first inductor 31 is wound the same number of times with one connecting portion 10c1 interposed therebetween. Similarly, the second inductor 32 is wound the same number of times with the other connecting portion 10c2 interposed therebetween. That is, the first inductor 31 is formed so that the number of turns between one connection 10c1 and the first electrode 51 is equal to the number of turns between one connection 10c1 and the third electrode 53. . Similarly, the second inductor 32 is formed so that the number of turns between the other connection portion 10c2 and the second electrode 52 is equal to the number of turns between the other connection portion 10c2 and the fourth electrode 54. The

  First to fourth electrodes 51 to 54 are formed at the four corners (corner portions) of the annular portion 10a of the magnetic core 10 in plan view from the bottom surface to the side surfaces and the top surface. More specifically, the first electrode 51 and the third electrode 53 are arranged at symmetrical positions with the installation portion 10b of the magnetic core 10 interposed therebetween (as a symmetry axis), and the second electrode 52 and the fourth electrode 54 are arranged. Are arranged at symmetrical positions. A fifth electrode 55 and a sixth electrode 56 are disposed between the third electrode 53 and the fourth electrode 54. In addition, the 1st-6th electrodes 51-56 are formed by metal plating, baking of a metal paste, etc., for example.

  Then, one end of one winding 20 a constituting the common mode choke coil 20 and one end of the wire forming the first inductor 31 are electrically connected to the first electrode 51. Similarly, one end of the other winding 20 b constituting the common mode choke coil 20 and one end of the wire forming the second inductor 32 are electrically connected to the second electrode 52. Further, the other end of one winding 20 a constituting the common mode choke coil 20 is electrically connected to the third electrode 53. Further, the other end of the other winding 20 b constituting the common mode choke coil 20 is electrically connected to the fourth electrode 54. On the other hand, the other end of the wire forming the first inductor 31 is electrically connected to the fifth electrode 55. Similarly, the other end of the wire forming the second inductor 32 is electrically connected to the sixth electrode 56.

  By being configured as described above, the common mode choke coil 20 formed by winding the pair of windings 20a and 20b around the installation part 10b of the magnetic core 10 in the same direction and the pair of windings are magnetic. The composite filter component 1 including the first inductor 31 and the second inductor 32 formed by being wound around the annular portion 10a of the body core 10 in opposite directions is obtained. Therefore, in this composite filter component 1, when a current flows in the first inductor 31, a magnetic flux (line of magnetic force) that is generated by the first inductor 31 and passes inside the first inductor 31 and a current flows in the second inductor 32. The magnetic flux (magnetic field lines) generated by the second inductor 32 and passing through the inside of the second inductor 32 are substantially parallel to each other to form a closed loop, and when a current flows through the common mode choke coil 20, the common mode choke Magnetic flux (magnetic field lines) generated by the coil 20 and passing through the inside of the common mode choke coil 20, magnetic flux (magnetic field lines) passing through the inside of the first inductor 31, and magnetic flux (magnetic field lines) passing through the inside of the second inductor 32, respectively. Magnetic windings are orthogonal to each other at the winding portions of the first inductor 31 and the second inductor 32. There is formed. Note that the two magnetic fluxes are preferably orthogonal (that is, perpendicularly intersect), but may be configured such that the two magnetic fluxes intersect at an angle other than perpendicular.

  Next, the operation of the composite filter component 1 will be described with reference to FIGS. 2 and 3 together. 2 and 3 are views for explaining the function of the composite filter component 1. FIG. 2A shows a magnetic field generated when a normal mode current flows through the common mode choke coil 20. Similarly, FIG. 2B shows a magnetic field generated when a common mode current flows through the common mode choke coil 20. On the other hand, FIG. 3A shows a magnetic field generated when a normal mode current flows through the first and second inductors 31 and 32. Similarly, FIG. 3B shows a magnetic field generated when a common mode current flows through the first and second inductors 31 and 32. In FIG. 2, the magnetic field lines of magnetic field generated by one winding 20a are indicated by broken lines, and the magnetic field lines of magnetic field generated by the other winding 20b are indicated by dashed lines. Similarly, in FIG. 3, the magnetic field lines of the magnetic field generated by the first inductor 31 are indicated by broken lines, and the magnetic field lines of the magnetic field generated by the second inductor 32 are indicated by alternate long and short dash lines.

(1) When a normal mode current flows through the common mode choke coil 20 As shown in FIG. 2A, when a normal mode current flows through the common mode choke coil 20, the common mode choke coil 20 generates a magnetic field (magnetic flux). ) Is canceled out, no current flows through the first and second inductors 31 and 32.

(2) When a common mode current flows through the common mode choke coil 20 As shown in FIG. 2B, when a common mode current flows through the common mode choke coil 20, the first and second inductors 31, 32 Since a magnetic field in the reverse direction is generated from each of the connection portions 10c1 and 10c2 (branch points) and the electromotive force is in the reverse direction, no current flows through the first and second inductors 31 and 32.

(3) When normal mode current flows through first and second inductors 31 and 32 As shown in FIG. 3A, when normal mode current flows through first and second inductors 31 and 32, Since the mode choke coil 20 has a magnetic field in the opposite direction, no current flows through the common mode choke coil 20.

(4) When the common mode current flows through the first and second inductors 31 and 32 As shown in FIG. 3B, the common mode current flows through the first and second inductors 31 and 32 as well. Since the mode choke coil 20 has a magnetic field in the opposite direction, no current flows through the common mode choke coil 20.

  As described above, according to the present embodiment, the magnetic core 10 has the annular portion 10a and the erection portion 10b provided so as to extend over the inner side of the annular portion 10a. The common mode choke coil 20 is wound, and the first inductor 31 is wound around a region of the annular portion 10a including one of the erected portion 10b and the annular portion 10a, and the annular portion 10a is annularly formed with the erected portion 10b. The second inductor 32 is wound around a region including the other connecting portion 10c2 with the portion 10a. Therefore, the direction of the magnetic field lines of magnetic field generated by the current flowing in the common mode choke coil 20 and the direction of the magnetic field lines of magnetic field generated by the current flowing in the first inductor 31 and the second inductor 32 intersect, and both magnetic fields cancel each other. Magnetic coupling between the common mode choke coil 20 and the first inductor 31 and the second inductor 32 can be suppressed. Therefore, it is possible to suppress the normal mode noise of the first and second inductors 31 and 32 from being coupled to the common mode choke coil 20. Further, even if a current of the power source flows through the first inductor 31 and the second inductor 32, the current flowing through the common mode choke coil 20 is reduced (or the current does not flow). Can be prevented. As a result, the magnetic coupling between the common mode choke coil 20 and the first and second inductors 31 and 32 can be suppressed, and magnetic saturation of the common mode choke coil 20 can be prevented.

  Further, according to the present embodiment, the first inductor 31 is wound the same number of times with one connection portion 10c1 interposed therebetween, and the second inductor 32 is wound the same number of times with the other connection portion 10c2 interposed therebetween. It has been turned. Therefore, the magnetic field generated by the common mode choke coil 20 generates an electromotive force having the same magnitude but the opposite direction across the connection portions 10c1 and 10c2 in the first inductor 31 and the second inductor 32, respectively. Therefore, both can be effectively canceled out, and the magnetic coupling between the common mode choke coil 20 and the first and second inductors 31 and 32 can be further suppressed.

  In particular, according to the present embodiment, since the annular portion 10a and the installation portion 10b are connected substantially at right angles, the magnetic coupling between the common mode choke coil 20 and the first and second inductors 31 and 32 is theoretically zero. It is possible to suppress both magnetic couplings most effectively.

  Further, according to the present embodiment, since the annular portion 10a is formed in a rectangular shape, it is advantageous for manufacturing and mounting of components, and space efficiency when mounted on a wiring board is improved (that is, high-density mounting). ) Is possible.

  According to the present embodiment, one end of one winding 20 a constituting the common mode choke coil 20 and one end of the wire forming the first inductor 31 are electrically connected to the annular portion 10 a of the magnetic core 10. A first electrode 51 to be connected; one end of the other winding 20b constituting the common mode choke coil 20; and a second electrode 52 to which one end of a wire forming the second inductor 32 is electrically connected. The other end of one winding 20a constituting the common mode choke coil 20 is electrically connected, and the other end of the other winding 20b constituting the common mode choke coil 20 is electrically connected. The fourth electrode 54 to be connected, the fifth electrode 55 to which the other end of the wire forming the first inductor 31 is electrically connected, and the other end of the wire forming the second inductor 32 are A sixth electrode 56 which is gas-connected are formed. Therefore, when connecting the plurality of wires forming the common mode choke coil 20, the first inductor 31, and the second inductor 32 and the first to sixth electrodes 51 to 56, the wires can be made difficult to cross each other. .

  In particular, according to the present embodiment, the distance between one of the annular portion 10a and the installation portion 10b and the first electrode 51 is such that the other connection portion 10c2 of the annular portion 10a and the installation portion 10b is the fourth distance. The distance between the other connection portion 10c2 between the annular portion 10a and the erection portion 10b and the second electrode 52 is equal to the distance from the electrode 54, and one connection portion 10c1 between the annular portion 10a and the erection portion 10b. And the third electrode 53 is formed to be equal to the distance. Furthermore, according to the present embodiment, the distance between one connection portion 10c1 between the annular portion 10a and the installation portion 10b and the first electrode 51 is such that the one connection portion 10c1 between the annular portion 10a and the installation portion 10b The distance between the second electrode 52 and the other connecting portion 10c2 between the annular portion 10a and the erected portion 10b is equal to the distance between the third electrode 53 and the second electrode 52. The distance between the portion 10c2 and the fourth electrode 54 is the same. Therefore, the distances between the connection portions 10c1 and 10c2 between the annular portion 10a and the erection portion 10b and the first to sixth electrodes 51 to 56 are all equal. Therefore, the length (line length) of each of the pair of windings 20a and 20b constituting the common mode choke coil 20 can be made equal, and the phase shift (skew) of the differential transmission signal flowing through the common mode choke coil 20 can be reduced. It becomes possible to improve.

  In addition, according to the present embodiment, the first electrode 51 and the third electrode 53 are arranged at symmetrical positions with the erected portion 10b interposed (as a symmetry axis), and the second electrode 52 and the fourth electrode 54 are The fifth electrode 55 and the sixth electrode 56 are disposed between the third electrode 53 and the fourth electrode 54 while being disposed at symmetrical positions. Therefore, when connecting the plurality of wires forming the common mode choke coil 20, the first inductor 31, and the second inductor 32 and the first to sixth electrodes 51 to 56, the wires can be made difficult to cross each other. .

  Next, the power over data line (PoDL) circuit 3 (power superposition circuit) using the composite filter component 1 described above will be described with reference to FIGS. 4 and 5 together. FIG. 4 is a diagram illustrating a configuration of the PoDL circuit 3 using the composite filter component 1. FIG. 5 is a circuit diagram of the PoDL circuit 3 shown in FIG.

  The PoDL circuit 3 includes the above-described composite filter component 1, a pair of differential transmission lines 101 connected to the first electrode 51 and the second electrode 52, and a pair of differential transmissions to the third electrode 53 and the fourth electrode 54. Two capacitors 104, a fifth electrode 55, and a second electrode interposed between the PHY 102 connected via the line 101, the third electrode 53 and the PHY 102, and the fourth electrode 54 and the PHY 102, respectively. A power supply circuit 106 connected to the six electrodes 56 via the power supply line 103 is provided. By connecting in this way, as shown in FIG. 5, the common mode choke coil 20 is connected in series to the differential transmission line 101, and the first and second inductors 31 and 32 are respectively connected to the differential transmission line 101. And the power supply line 103.

  Here, as the differential transmission line 101, for example, unshielded twisted pair cables 101a and 101b (UTP) are used. A PHY (PHYsical Layer) 102 converts a logic signal into an electric signal in an interface such as Ethernet (registered trademark), and corresponds to an integrated circuit described in the claims. The power supply circuit 106 and the power supply line 103 supply DC power superimposed on the differential transmission line 101. Note that, here, the side on which power is superimposed and supplied is shown as an example, but the composite filter component 1 can also be applied to the side that receives the superimposed power. Capacitors 104 and 104 are interposed between the third electrode 53, the fourth electrode 54, and the PHY 102, allow a differential transmission signal to pass therethrough, and block DC power. The PoDL circuit 3 is connected to Ethernet (registered trademark) or the like via the connector 105.

  According to the present embodiment, since the composite filter component 1 described above is provided, when power is superimposed on the differential transmission line 101, the magnetic field between the common mode choke coil 20 and the first and second inductors 31 and 32 is increased. Coupling can be suppressed (that is, normal mode noise flowing through the first and second inductors 31 and 32 can be suppressed from coupling to the common mode choke coil 20), and the DC current flowing through the power supply line 103 can be used as a common mode choke. It is possible to prevent the coil 20 from being magnetically saturated and deteriorating in characteristics. Furthermore, the line length can be made equal, and the phase shift (skew) of the differential transmission signal flowing through the common mode choke coil 20 can be improved.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, in the above-described embodiment, the annular portion 10a of the magnetic core 10 is formed in a rectangular shape, but the shape of the annular portion 10a is not limited to a rectangular shape, and may be a closed shape such as an annular shape. Further, the shape of the magnetic core 10 and the arrangement of the first to sixth electrodes 51 to 56 are not limited to the above embodiment.

  Here, the configuration of the PoDL circuit 3B using the composite filter component 1B according to the modification is shown in FIG. The composite filter component 1B is different from the composite filter component 1 described above in the arrangement of the third electrode 53 and the fourth electrode 54 and the arrangement of the fifth electrode 55 and the sixth electrode 56. That is, as shown in FIG. 6, in the composite filter component 1 </ b> B, the fifth electrode 55 and the sixth electrode 56 are arranged at the corners of the annular portion 10 a of the magnetic core 10, and the third electrode 53 and the fourth electrode 54. Is disposed between the first electrode 51 and the fifth electrode 55. Since other configurations are the same as those of the composite filter component 1 described above, detailed description thereof is omitted here.

  Even if the third electrode 53 and the fourth electrode 54 are arranged in this manner, the same effects as those of the composite filter component 1 and the PoDL circuit 3 described above can be obtained. Further, when connecting the plurality of wires forming the common mode choke coil 20, the first inductor 31, and the second inductor 32 and the first to sixth electrodes 51 to 56, the wires can be made difficult to cross each other. .

  Further, in the above-described embodiment, the winding type component is described as an example, but the present invention can also be applied to a laminated type component. In this case, the laminated material inside the coil corresponds to the magnetic core.

DESCRIPTION OF SYMBOLS 1,1B Composite filter component 3,3B PoDL (Power over Data Line) circuit 10 Magnetic body core 10a Annular part 10b Construction part 10c1, 10c2 Connection part 20 Common mode choke coil 20a One winding 20b The other winding 31 1st Inductor 32 Second inductor 51, 52, 53, 54, 55, 56 First electrode, second electrode, third electrode, fourth electrode, fifth electrode, sixth electrode 101 Differential transmission line 102 PHY
103 power supply line 104 capacitor 105 connector 106 power supply circuit

Claims (12)

A common mode choke coil formed by winding a pair of wires in the same direction;
Of the pair of wires constituting the common mode choke coil, one end is electrically connected to one wire and the other wire of the pair of wires constituting the common mode choke coil is electrically connected. The first inductor and the second inductor formed by winding the connected wires in opposite directions to each other,
A magnetic flux generated by the first inductor when current flows through the first inductor and passing inside the first inductor, and generated by the second inductor when current flows through the second inductor and the second inductor. Magnetic flux passing through the inside of the inductor forms a closed loop that is substantially parallel to each other, and is generated by the common mode choke coil and passes through the inside of the common mode choke coil when a current flows through the common mode choke coil. A magnetic circuit is formed so that the magnetic flux intersects the magnetic flux passing through the inside of the first inductor and the magnetic flux passing through the inside of the second inductor at the winding portion of each of the first inductor and the second inductor. A composite filter component characterized by that. A common mode choke coil formed by winding a pair of wires in the same direction;
Of the pair of wires constituting the common mode choke coil, one end is electrically connected to one wire and the other wire of the pair of wires constituting the common mode choke coil is electrically connected. First and second inductors formed by winding the connected wires in opposite directions to each other,
A magnetic core having an annular portion and an erected portion provided between two points on the annular portion;
The common mode choke coil is wound around the installation part,
The first inductor is wound around a region of the annular portion including one connection portion between the installation portion and the annular portion,
The said 2nd inductor is wound by the area | region including the other connection part of the said installation part and the said annular part of the said annular part, The composite filter component characterized by the above-mentioned.   The composite filter component according to claim 2, wherein the erection part is provided so as to extend inside the annular part in a plan view. The first inductor is wound the same number of times across the one connection part,
4. The composite filter component according to claim 2, wherein the second inductor is wound the same number of times with the other connecting portion interposed therebetween.   5. The composite filter component according to claim 2, wherein the annular portion and the installation portion are connected at a substantially right angle.   6. The composite filter component according to claim 2, wherein the annular portion is formed in a rectangular frame shape. In the annular part,
One end of one wire constituting the common mode choke coil, and a first electrode to which one end of the wire forming the first inductor is electrically connected;
A second electrode to which one end of the other wire constituting the common mode choke coil and one end of the wire forming the second inductor are electrically connected;
A third electrode to which the other end of one wire constituting the common mode choke coil is electrically connected;
A fourth electrode to which the other end of the other wire constituting the common mode choke coil is electrically connected;
A fifth electrode to which the other end of the wire forming the first inductor is electrically connected;
A sixth electrode to which the other end of the wire forming the second inductor is electrically connected;
The composite filter component according to claim 2, wherein the composite filter component is formed. A distance between one connection portion between the annular portion and the erection portion and the first electrode is formed to be equal to a distance between the other connection portion between the annular portion and the erection portion and the fourth electrode. ,
The distance between the second connection portion of the annular portion and the erection portion and the second electrode is formed equal to the distance between one connection portion of the annular portion and the erection portion and the third electrode. The composite filter part according to claim 7, wherein the composite filter part is provided. A distance between one connection portion between the annular portion and the erection portion and the first electrode is formed to be equal to a distance between one connection portion between the annular portion and the erection portion and the third electrode. ,
The distance between the other connection part of the annular part and the installation part and the second electrode is formed to be equal to the distance between the other connection part of the annular part and the installation part and the fourth electrode. The composite filter part according to claim 7 or 8, wherein the composite filter part is provided.   The first electrode and the third electrode are disposed at a symmetrical position with the erected portion in between, the second electrode and the fourth electrode are disposed at a symmetrical position, and the third electrode, The composite filter component according to any one of claims 7 to 9, wherein the fifth electrode and the sixth electrode are disposed between the fourth electrode and the fourth electrode.   The first electrode and the fifth electrode are disposed at a symmetrical position with the erected portion in between, the second electrode and the sixth electrode are disposed at a symmetrical position, and the first electrode and The composite filter component according to any one of claims 7 to 9, wherein the third electrode and the fourth electrode are disposed between the fifth electrode and the fifth electrode. The composite filter component according to any one of claims 1 to 11,
A pair of differential transmission lines connected to the first electrode and the second electrode;
An integrated circuit connected to the third electrode and the fourth electrode via a pair of differential transmission lines;
A capacitor interposed between the third electrode and the integrated circuit and between the fourth electrode and the integrated circuit, and
And a power supply line connected to the fifth electrode and the sixth electrode.

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