JP6132025B2 - Electronic components and electronic circuits - Google Patents

Description

  The present invention relates to an electronic component and an electronic circuit, and more particularly to an electronic component and an electronic circuit that distribute an unbalanced signal and further convert the unbalanced signal into a balanced signal.

  In recent years, an increasing number of communication devices having two or more receiving systems are required for communication devices having a broadcast receiving function such as televisions and mobile phones, and a distributor for distributing the input signal from the antenna to two is required. It is said that. In addition, those using balanced signals are generalized from the viewpoint of noise resistance associated with higher frequency of each communication device and consistency with an IC connected to a distributor. For this reason, an unbalanced / balanced converter for converting an unbalanced signal from an antenna into a balanced signal is also required. As an electronic component in which a distributor and an unbalanced / balanced converter are integrated, a balanced distributor described in Patent Document 1 is known.

  By the way, an electronic component 500 (see FIG. 15) in which a distributor and an unbalanced balanced converter are integrated, which is similar to the balanced distributor described in Patent Document 1, includes two parts distributed by the distributor and the distributor. It is composed of a total of three electronic elements of an unbalanced balanced converter for each input signal. Specifically, as shown in FIG. 15, the electronic component 500 includes unbalanced input / unbalanced output distributors (distributors) 502 and unbalanced / balanced converters (baluns) 503 and 504. The distributor 502 has a function of distributing the unbalanced signal input from the unbalanced terminal 505 into two and isolating the two output terminals of the distributor 502. The baluns 503 and 504 convert the two unbalanced signals distributed by the distributor 502 into balanced signals, respectively.

  Therefore, in the electronic component 500 in which the distributor and the unbalanced / balanced converter are integrated, conventionally, three electronic elements are required, and there is a problem that the number of components is large and the size is increased accordingly.

Japanese Patent No. 4079173

  An object of the present invention is to provide an electronic component and an electronic circuit that can reduce the number of components and reduce the size in an electronic component and an electronic circuit that distribute an unbalanced signal and further convert the unbalanced signal into a balanced signal. It is to be.

The electronic component according to the first aspect of the present invention is
An unbalanced signal input terminal;
A first output terminal;
A second output terminal;
A third output terminal;
A fourth output terminal;
Wherein a first coil and a first unbalance balanced converter comprising the first coil and the third coil electromagnetically coupled input terminal electrically connected to an unbalanced signal, the first A first unbalanced balanced converter that outputs a balanced signal from the first output terminal and the second output terminal ;
Wherein a second unbalance balanced converter including a second coil and the second coil and the fourth coil electromagnetically coupled input terminal electrically connected to an unbalanced signal, the second A second unbalanced-balanced converter that outputs a balanced signal from the third output terminal and the fourth output terminal ;
With
The first coil and the second coil are arranged such that magnetic fluxes generated by the unbalanced signal cancel each other;
It is characterized by.
The electronic component according to the second aspect of the present invention is
A first unbalanced balanced converter including a first coil electrically connected to an input terminal of the unbalanced signal;
A second unbalanced and balanced converter including a second coil electrically connected to the input terminal of the unbalanced signal;
With
The first unbalanced balanced converter and the second unbalanced balanced converter are electromagnetically coupled to each other, and are arranged such that magnetic fluxes generated by the unbalanced signal cancel each other.
The first unbalanced / balanced converter includes a fifth coil connected in series with the first coil, a third coil electromagnetically coupled to the first coil, and a third coil in series. A sixth coil connected and electromagnetically coupled to the fifth coil;
The second unbalanced / balanced converter includes a seventh coil connected in series with the second coil, a fourth coil electromagnetically coupled to the second coil, and a series of the fourth coil. An eighth coil connected and electromagnetically coupled to the seventh coil;
The first coil and the second coil are arranged so that they are electromagnetically coupled to each other, and magnetic fluxes generated by input signals inputted to them are canceled out each other,
The sixth coil and the eighth coil are arranged so as to be electromagnetically coupled to each other and magnetic fluxes generated by input signals input to them are canceled out from each other;
It is characterized by.

An electronic circuit according to a third aspect of the present invention is
The electronic component;
A first end to which an unbalanced input signal is input, a second end connected to the first unbalanced transducer, and a third connected to the second unbalanced transducer. A conductor having an end;
Providing
It is characterized by.

  In the electronic component according to the first aspect of the present invention, the first unbalanced-balance converter and the second unbalanced-balanced converter are electromagnetically coupled to each other, and the first unbalanced-balanced converter and It arrange | positions so that the magnetic flux which generate | occur | produces with the input signal input into the 2nd unbalance balance converter may be mutually canceled. As a result, the first unbalanced balanced converter and the unbalanced input terminal of the second unbalanced balanced converter and the unbalanced input terminal of the second unbalanced balanced converter are electrically connected. A large impedance is not generated for the input signal input to the second unbalanced / balanced converter, and the input signal smoothes the first unbalanced / balanced converter and the second unbalanced / balanced converter. pass.

  On the other hand, when a signal having an approximately opposite phase to the input signal enters from the balanced output terminal side of the first unbalanced balanced converter, the magnetic flux generated thereby is input to the first unbalanced balanced converter. The magnetic flux is generated in the opposite direction to the magnetic flux generated by the input signal. Further, the magnetic flux generated by the input signal input to the first unbalanced / balanced converter is opposite to the magnetic flux generated by the input signal input to the second unbalanced / balanced converter. Accordingly, the magnetic flux generated by the substantially opposite phase signal and the magnetic flux generated by the input signal input to the second unbalanced balanced converter are in the same direction, and thus strengthen each other. As a result, a large impedance is generated for the substantially opposite phase signal, and the substantially opposite phase signal cannot smoothly pass through the first unbalanced / balanced converter. In addition, a substantially antiphase signal that enters from the output terminal side of the second unbalanced / balanced converter cannot smoothly pass through the second unbalanced / balanced converter by the same principle.

  Further, when a signal having substantially the same phase as the input signal enters from the balanced output terminal side of the first unbalanced balanced converter, the first unbalanced balanced converter functions as a common mode choke coil. The signal cannot pass through the first unbalanced / balanced converter smoothly. Even when a signal having substantially the same phase as the input signal enters from the balanced output terminal side of the second unbalanced balanced converter, the signal passes smoothly through the second unbalanced balanced converter based on the same principle. I can't. Examples of the signal that enters from the balanced output terminal include signals such as noise components and interference wave components from a transmitter connected to the unbalanced balanced converter.

  As described above, in the electronic component according to the first embodiment of the present invention, it is possible to suppress the signal input from the balanced output terminal side of one unbalanced balanced converter from being transmitted to the input terminal of the other unbalanced balanced converter. can do. That is, it is possible to suppress the signal that enters from the balanced output terminal side of one unbalanced converter to the output side of the other unbalanced converter. Here, the function of suppressing the sneak in of the signal coming from the balanced output terminal side is a function of taking the isolation that the distributor has performed in the electronic component 500. Therefore, the electronic component according to the first embodiment of the present invention does not require a distributor because the function that the distributor has performed is added to the unbalanced / balanced converter. That is, in the electronic component according to the first embodiment of the present invention, the number of components can be reduced and the size can be reduced.

  According to the present invention, in an electronic component including a distributor and an unbalanced / balanced converter, the number of components can be reduced and the size can be reduced.

It is the schematic of the receiver containing the electronic component and electronic circuit which are one Example. It is an external view of the electronic component which is one Example. It is the schematic of the electronic component which is one Example. It is the schematic of the electronic component which is one Example. It is a figure which shows the flow of the signal in a 1st model and a 2nd model. It is a figure which shows the simulation result performed using the 2nd model. It is a figure which shows the simulation result performed using the 1st model. It is the schematic of the electronic component which is a 1st modification. It is the schematic of the electronic component which is a 1st modification. It is the schematic of the electronic component which is a 2nd modification. It is the schematic of the electronic component which is a 2nd modification. It is a figure which shows the flow of the signal in a 3rd model. It is a figure which shows the simulation result performed using the 3rd model. It is the schematic of the electronic component which is a 3rd modification. It is the schematic of the electronic component which integrated the divider | distributor and the unbalanced balance converter similar to the balanced type | mold distributor of patent document 1. FIG.

(Configuration of electronic components and electronic circuit, see FIGS. 1 to 4)
An electronic component 1 and an electronic circuit 100 according to an embodiment will be described with reference to the drawings. As shown in FIG. 1, the electronic component 1 is incorporated in an electronic circuit 100 that constitutes a part of a receiver 200 such as a television or a mobile phone. As shown in FIG. 2, the electronic component 1 has a rectangular parallelepiped shape, and includes a laminated body 8, input terminals 30 and 32, output terminals 40, 41, 43 and 44, and ground terminals 42 and 45. Furthermore, the electronic component 1 includes a balun 10 (first unbalanced and balanced converter) and a balun 20 (second unbalanced and balanced converter) as shown in FIG. .

  The laminated body 8 is configured by laminating a plurality of rectangular insulating layers from the upper side to the lower side, and has a rectangular parallelepiped shape as shown in FIG. The insulating layer is, for example, a layer made of a magnetic material such as Ni-Cu-Zn ferrite, a layer formed by compacting metal magnetic powder whose surface is insulated, or a non-magnetic material such as a dielectric. It is a layer consisting of the body. Hereinafter, the vertical direction of the stacked body 8 is defined as the z-axis direction, the direction in which the long side extends when the stacked body 8 is viewed from the z-axis direction is defined as the x-axis direction, and the stacked body 8 is defined as The direction in which the short side extends when viewed from the z-axis direction is defined as the y-axis direction.

  The ground terminal 42, the input terminals 30 and 32, and the ground terminal 45 are provided on the side surface on the negative direction side in the y axis direction of the stacked body 8 so as to be arranged in this order from the negative direction side in the x axis direction to the positive direction side. It has been. The output terminals 41, 40, 43, and 44 are provided on the side surface on the positive side in the y-axis direction of the stacked body 8 so as to be arranged in this order from the negative direction side in the x-axis direction to the positive direction side.

  As shown in FIG. 3, the balun 10 includes two spiral coils 12 and 14 (a first coil and a third coil). The coils 12 and 14 are configured by connecting a coil conductor formed on an insulating layer and a via-hole conductor penetrating the insulating layer in the z-axis direction. The central axes of the coils 12 and 14 extend in the z-axis direction and are stacked so that the central axes thereof substantially coincide with each other. In the present embodiment, the coil 12 is located on the positive side in the z-axis direction with respect to the coil 14. Furthermore, the winding direction of the coil 12 and the winding direction of the coil 14 are the same. In this embodiment, the winding direction is viewed from the coil 14 toward the coil 12 (from the negative direction side in the z-axis direction). (When viewed) is clockwise with respect to the input signal S1. Thereby, the coil 12 and the coil 14 are electromagnetically coupled. One end of the coil 12 is connected to the input terminal 30 and the other end is connected to the output terminal 40. One end of the coil 14 is connected to the output terminal 41, and the other end is connected to the ground terminal 42.

  In the balun 10 configured as described above, the unbalanced input signal S1 input from the input terminal 30 passes through the coil 12 and is output from the output terminal 40. At this time, a signal S3 having a phase opposite to that of the input signal S1 is generated in the coil 14 by mutual induction and is output from the output terminal 41. That is, the unbalanced input signal S1 input from the input terminal 30 is output from the output terminals 40 and 41 as a balanced signal. The ground terminal 42 is connected to the ground electrode.

  The balun 20 is provided on the positive side in the z-axis direction with respect to the balun 10 and includes two spiral coils 22 and 24 (second coil and fourth coil). The coils 22 and 24 are configured by connecting a coil conductor formed on an insulating layer and a via-hole conductor penetrating the insulating layer in the z-axis direction. The central axes of the coils 22 and 24 extend in the z-axis direction and are stacked so that their central axes substantially coincide with each other. In the present embodiment, the coil 22 is located on the negative side in the z-axis direction with respect to the coil 24. Furthermore, the winding direction of the coil 22 and the winding direction of the coil 24 are the same. In this embodiment, the winding direction is viewed from the coil 22 toward the coil 24 (from the negative side in the z-axis direction). (When viewed) is counterclockwise with respect to the input signal S2. As a result, the coil 22 and the coil 24 are electromagnetically coupled. One end of the coil 22 is connected to the input terminal 32, and the other end is connected to the output terminal 43. One end of the coil 24 is connected to the output terminal 44, and the other end is connected to the ground terminal 45.

  In the balun 20 configured as described above, the unbalanced input signal S <b> 2 input from the input terminal 32 passes through the coil 22 and is output from the output terminal 43. At this time, a signal S4 having a phase opposite to that of the input signal S2 is generated in the coil 24 by mutual induction, and is output from the output terminal 44. That is, the unbalanced input signal S2 input from the input terminal 32 is output as a balanced signal from the output terminals 43 and 44 (coils 22 and 24). The ground terminal 45 is connected to the ground electrode.

  By the way, the balun 10 and the balun 20 are arranged so that they are electromagnetically coupled. Specifically, in the electronic component 1, the coil 12 of the balun 10 and the coil 22 of the balun 20 are stacked in the z-axis direction so that their center axes substantially coincide with each other and are electromagnetically coupled. The winding direction of the coil 12 is opposite to the winding direction of the coil 22. Then, the magnetic flux B1 generated in the coil 12 by the input signal S1 and the magnetic flux B2 generated in the coil 22 by the input signal S2 face each other and cancel each other. As a result, no large impedance is generated with respect to the input signals S1 and S2, and the input signals S1 and S2 pass through the coils 12 and 22 smoothly.

  On the other hand, when a signal S5 having a phase substantially opposite to that of the input signal S1 enters from the output terminal 40 of the coil 12, the magnetic flux B5 generated thereby is opposite to the magnetic flux B1. Therefore, the magnetic flux B2 and the magnetic flux B5 generated in the coil 22 by the input signal S2 become magnetic fluxes in the same direction as shown in FIG. As a result, a large impedance is generated for the signal S5, and the signal S5 cannot pass through the coil 12 smoothly. Even when a signal having a phase substantially opposite to that of the input signal S2 enters from the output terminal 43 of the coil 22, the coil 22 cannot be smoothly passed on the same principle.

  Further, when a signal substantially in phase with the input signal S1 enters from the output terminal 40 of the coil 12, the magnetic flux generated thereby passes smoothly through the coil 12 because the balun 10 functions as a common mode choke coil. I can't. Even when a signal having substantially the same phase as the input signal S2 enters from the output terminal 43 of the coil 22, it cannot pass through the coil 22 by the same principle. As described above, in the electronic component 1, the sneaking of the signal that enters from the balanced output terminal side of one unbalanced / balanced converter to the output side of the other unbalanced converter is suppressed.

  The coil 14 of the balun 10 is positioned on the opposite side of the coil 22 with the coil 12 interposed therebetween, and the coil 24 of the balun 20 is positioned on the opposite side of the coil 12 with the coil 22 interposed therebetween. Therefore, the interval between the coil 14 and the coil 24 is larger than the interval between the coil 12 and the coil 14. However, the coil 14 and the coil 24 are electromagnetically coupled, and signal wraparound is also suppressed between the coil 14 and the coil 24 by the mechanism described above. That is, the coil 14 and the coil 24 also contribute to the function of taking isolation.

  As shown in FIG. 1, the electronic circuit 100 includes the above-described electronic component 1 and a circuit board 101. The circuit board 101 is provided with a conductive wire 102 having three ends. Specifically, an end 102a (an input terminal for an unbalanced signal) to which the unbalanced signal S0 from the antenna A is input, an end 102b connected to the input terminal 30 of the electronic component 1, An end portion 102c connected to the input terminal 32 is provided. Therefore, the conducting wire 102 plays a role of dividing the unbalanced signal S0 from the antenna A into the unbalanced signal S1 and the unbalanced signal S2.

(effect)
In the electronic component 1 according to one embodiment, as described above, a large impedance is generated with respect to a signal that has entered from the output terminal, and the wraparound of the signal is suppressed. Here, the function of suppressing the wraparound of the signal is a function that the distributor 502 plays in the electronic component 500 that distributes the conventional unbalanced signal and further converts the unbalanced signal into the balanced signal. That is, in the electronic component 1, since the function which the divider | distributor 502 was carrying out is provided with respect to the baluns 10 and 20, the divider | distributor 502 is unnecessary. That is, the electronic component 1 can be reduced in size by reducing the number of components.

  Here, the inventor of the present application performed a simulation in order to clarify the function of suppressing the wraparound of the signal included in the electronic component 1, that is, the function of taking isolation between the output terminals. In the simulation, a first model corresponding to the electronic component 1 and a second model in which the electromagnetic coupling between the coils in the electronic component 1 was removed were used.

  In the simulation, the attenuation ratio (isolation characteristic) of the signal S6 that enters the coil 12 from the output terminal 40, wraps around the coil 22, and exits to the output terminal 43 shown in FIG. Specifically, the ratio of the intensity of the signal S6 at the output terminal 43 to the signal S6 at the output terminal 40 was measured. This attenuation ratio is defined as an isolation characteristic S30.

  In addition, in the simulation, the attenuation ratio (isolation characteristic) of the signal S7 that enters the coil 14 from the output terminal 41, goes around the coil 24, and exits to the output terminal 44 was measured. Specifically, the ratio of the intensity of the signal S7 at the output terminal 44 to the intensity of the signal S7 at the output terminal 41 was measured. This attenuation ratio is defined as an isolation characteristic S41.

  FIG. 6 shows the result of the simulation performed using the second model, and FIG. 7 shows the result of the simulation performed using the first model. 6 and 7, the vertical axis represents the signal attenuation ratio (isolation characteristic), and the horizontal axis represents the frequency.

  As shown in FIG. 6, in the second model, the attenuation at each frequency of the signal S6 and the signal S7 is substantially equal, and the attenuation ratio increases as the frequency increases, but no significant effect is observed. On the other hand, as shown in FIG. 7, the first model has a large attenuation pole in the vicinity of 1000 (MHz). That is, it was confirmed that the first model corresponding to the electronic component 1 has a function of suppressing signal wraparound, that is, a function of isolating output terminals.

  The reason why the attenuation ratios at the poles are different between the isolation characteristic S30 and the isolation characteristic S41 is that the distance between the coil 12 and the coil 22 is shorter than the distance between the coil 14 and the coil 24. This is because the electromagnetic coupling between the coils 22 and 22 is larger than the electromagnetic coupling between the coils 14 and 24.

(First Modification See FIGS. 8 and 9)
The differences between the electronic component 1A and the electronic component 1 according to the first modification are the relative positional relationship between the balun 10 and the balun 20 and the configuration of the coils 22 and 24 included in the balun 20. Other configurations of the electronic component 1 </ b> A are the same as those of the electronic component 1. Therefore, the description other than the relative positional relationship between the balun 10 and the balun 20 and the configuration of the coils 22 and 24 included in the balun 20 is as described in the electronic component 1.

  Specifically, in the electronic component 1, the balun 10 and the balun 20 are stacked in the z-axis direction, whereas in the electronic component 1A, as shown in FIG. Are arranged in a direction perpendicular to the z-axis direction so that the axial directions of the coils are substantially in the same direction. At this time, the coil 12 and the coil 22 are formed on one insulating layer, and the coil 14 and the coil 24 are formed on the same plane among the plurality of insulating layers constituting the stacked body 8. It is desirable because it can be more easily manufactured.

  In the balun 20 of the electronic component 1 </ b> A, the coil 22 is positioned on the positive side in the z-axis direction with respect to the coil 24. Furthermore, the winding direction of the coil 22 and the winding direction of the coil 24 are the same, and when viewed from the coil 24 toward the coil 22 (viewed from the negative direction side in the z-axis direction), the input signal S2 Around. That is, the coil 12, the coil 14, the coil 22, and the coil 24 are all clockwise with respect to the input signals S1 and S2 when viewed from the negative direction side in the z-axis direction. One end of the coil 22 is connected to the input terminal 32, and the other end is connected to the output terminal 43. One end of the coil 24 is connected to the output terminal 44, and the other end is connected to the ground terminal 45.

  In the electronic component 1 </ b> A configured as described above, a magnetic flux B <b> 1 is generated in the coils 12 and 14 of the balun 10 toward the positive side in the z-axis direction by the input signal S <b> 1. Then, the magnetic flux B <b> 1 once exits from one end surface of the coil 12, makes a U-turn, and moves toward the other end surface of the coil 12. In this path, the magnetic flux B1 passes through the coil of the balun 20 toward the negative side in the z-axis direction. In addition, a magnetic flux B2 is generated in the coils 22 and 24 of the balun 20 toward the positive side in the z-axis direction by the input signal S2. The magnetic flux B <b> 2 once exits from one end surface of the coil 22, makes a U-turn, and moves toward the other end surface of the coil 22. In this path, the magnetic flux B2 passes through the coil of the balun 10 toward the negative side in the z-axis direction. Therefore, in the electronic component 1A, the magnetic flux B1 generated by the input signal S1 and the magnetic flux B2 generated by the input signal S2 face each other and cancel each other. As a result, no large impedance is generated with respect to the input signals S1 and S2, and the input signals S1 and S2 pass through the coils 12 and 22 smoothly.

  On the other hand, when a signal S5 having a phase substantially opposite to that of the input signal S1 enters from the output terminal 40 of the coil 12, the magnetic flux B5 generated thereby is opposite to the magnetic flux B1. That is, as shown in FIG. 9, the magnetic flux B <b> 5 is a magnetic flux that travels in the coils 12 and 14 of the balun 10 toward the negative side in the z-axis direction. Then, the magnetic flux B5 exits from the other end surface of the coil 12 and passes through the coil of the balun 20 toward the positive side in the z-axis direction in a path toward the one end surface of the coil 12 after making a U-turn. To do. At this time, the magnetic flux B5 generated by the signal S5 and the magnetic flux B2 generated by the input signal S2 become magnetic fluxes in the same direction, and therefore strengthen each other. As a result, a large impedance is generated for the signal S5, and the signal S5 cannot pass through the coil 12 smoothly. Even when a signal substantially in phase with the input signal S2 enters from the output terminal 43 of the coil 22, it cannot pass through the coil 22 by the same principle.

  Further, when a signal substantially in phase with the input signal S1 enters from the output terminal 40 of the coil 12, the magnetic flux generated thereby passes smoothly through the coil 12 because the balun 10 functions as a common mode choke coil. I can't. Even when a signal having substantially the same phase as the input signal S2 enters from the output terminal 43 of the coil 22, it cannot pass through the coil 22 by the same principle. As described above, in the electronic component 1, the sneaking of the signal that enters from the balanced output terminal side of one unbalanced / balanced converter to the output side of the other unbalanced converter is suppressed. As a result, similarly to the electronic component 1, the electronic component 1A can be reduced in size by reducing the number of components.

  Note that the coil 14 and the coil 24 are electromagnetically coupled, and signal wraparound is also suppressed between the coil 14 and the coil 24 by the mechanism described above. That is, the coil 14 and the coil 24 in the electronic component 1A also contribute to the function of isolating.

(Second Modification See FIGS. 10 and 11)
The differences between the electronic component 1B and the electronic component 1 according to the second modification are the number of coils included in the balun 10 and the balun 20 and their configuration. Other configurations of the electronic component 1B are the same as those of the electronic component 1. Therefore, the description other than the number of coils included in the balun 10 and the balun 20 and the configuration thereof is as described in the electronic component 1.

  The balun 10 of the electronic component 1B has a coil 16 (fifth coil) connected in series with the coil 12 between the coil 12 (first coil) and the output terminal 40, as shown in FIG. . Further, a coil 18 (sixth coil) connected in series with the coil 14 is provided between the coil 14 (third coil) and the output terminal 41. The coils 16 and 18 are stacked so that their central axes substantially coincide with each other. The winding direction of the coil 16 and the winding direction of the coil 18 are the same. In this embodiment, when viewed from the direction from the coil 16 to the coil 18, the winding direction is a timepiece with respect to the input signal S 1. Around.

  In the balun 10 of the electronic component 1 </ b> B configured as described above, the unbalanced input signal S <b> 1 input from the input terminal 30 passes through the coil 12 and the coil 16 and is output from the output terminal 40. At this time, a signal S3 having a phase opposite to that of the input signal S1 is generated in the coil 14 and the coil 18 by mutual induction and is output from the output terminal 41. That is, the unbalanced input signal S1 input from the input terminal 30 is output from the output terminals 40 and 41 as a balanced signal.

  Further, the balun 20 of the electronic component 1B includes a coil 26 (seventh coil) connected in series with the coil 22 between the coil 22 (second coil) and the output terminal 43, as shown in FIG. Have Further, a coil 28 (eighth coil) connected in series with the coil 24 is provided between the coil 24 (fourth coil) and the output terminal 44. The coils 26 and 28 are stacked so that their central axes substantially coincide with each other. The winding direction of the coil 26 and the winding direction of the coil 28 are the same. In this embodiment, the winding direction is opposite to the input signal S2 when viewed from the direction from the coil 28 to the coil 26. Clockwise.

  In the balun 20 of the electronic component 1 </ b> B configured as described above, the unbalanced input signal S <b> 2 input from the input terminal 32 passes through the coil 22 and the coil 26 and is output from the output terminal 43. At this time, a signal S4 having a phase opposite to that of the input signal S2 is generated in the coil 24 and the coil 28 by mutual induction, and is output from the output terminal 44. That is, the unbalanced input signal S2 input from the input terminal 30 is output from the output terminals 43 and 44 as a balanced signal.

  Incidentally, in the electronic component 1B, like the electronic component 1, the coils 12, 14 of the balun 10 and the coils 22, 24 of the balun 20 are disposed so as to be electromagnetically coupled. Further, in the electronic component 1B, the coils 16 and 18 of the balun 10 and the coils 26 and 28 of the balun 20 are disposed so as to be electromagnetically coupled. Specifically, the coil 18 of the balun 10 and the coil 28 of the balun 20 are stacked so that their center axes substantially coincide with each other. Further, the winding direction of the coil 18 is opposite to the winding direction of the coil 28. Then, a magnetic flux B3 generated by the signal S3 input to the coil 18 by mutual induction and a magnetic flux B4 generated by the signal S4 generated by the coil 24 and input to the coil 28 by the mutual induction. , Face each other and cancel each other. As a result, no impedance is generated for the signals S3 and S4, and the signals S3 and S4 pass through the coils 18 and 28 smoothly.

  On the other hand, when a signal S8 having a phase substantially opposite to that of the signal S3 enters from the output terminal 41 of the coil 18, the magnetic flux B7 generated thereby is opposite to the magnetic flux B3. Therefore, as shown in FIG. 11, the magnetic flux B4 and the magnetic flux B7 generated in the coil 28 by the signal S4 become magnetic fluxes in the same direction, and thus strengthen each other. As a result, an impedance is generated with respect to the signal S8, and the signal S8 cannot pass through the coil 18 smoothly. Even when a signal substantially in phase with the signal S4 enters from the output terminal 44 of the coil 28, the coil 28 cannot pass smoothly on the same principle.

  Further, when a signal having substantially the same phase as the signal S3 enters from the output terminal 41 of the coil 18, the magnetic flux generated thereby passes smoothly through the coil 18 because the balun 10 functions as a common mode choke coil. I can't. Even when a signal having substantially the same phase as the signal S4 enters from the output terminal 44 of the coil 28, it cannot pass through the coil 28 on the same principle. As described above, in the electronic component 1B, the signal entering from the balanced output terminal side of one unbalanced / balanced converter is prevented from wrapping around to the output side of the other unbalanced converter.

  The electronic component 1B is further excellent in isolation characteristics as compared with the electronic component 1. Specifically, in the electronic component 1, since the distance between the coil 12 and the coil 22 is shorter than the distance between the coil 14 and the coil 24, the electromagnetic coupling between the coil 12 and the coil 22, A difference occurs in electromagnetic coupling between the coils 24. As a result, as shown in the simulation result shown in FIG. 7, the electronic component 1 has a difference between the isolation characteristic S <b> 30 and the isolation characteristic 41.

  In the electronic component 1B, as shown in FIG. 10, the distance between the coil 18 connected to the coil 14 and the coil 28 connected to the coil 24 is equal to the coil 16 connected to the coil 12 and the coil connected to the coil 22. Smaller than 26. Therefore, the electromagnetic coupling between the coil 18 and the coil 28 is stronger than the electromagnetic coupling between the coil 16 and the coil 26. Further, the electromagnetic coupling between the coil 12 and the coil 22 is stronger than the electromagnetic coupling between the coil 14 and the coil 24. Thereby, in the electronic component 1 </ b> B, it is possible to obtain an isolation characteristic with a better balance as compared with the electronic component 1.

  Here, the inventor of the present application performed a simulation using a third model corresponding to the electronic component 1B in order to confirm a well-balanced isolation characteristic of the electronic component 1B.

  In the simulation, the attenuation ratio (isolation characteristic) of the signal S9 that enters the coil 16 from the output terminal 40, wraps around the coil 22 via the coil 12, and passes through the output terminal 43 of the coil 26 shown in FIG. It was measured. Specifically, the ratio of the intensity of the signal S9 at the output terminal 43 to the intensity of the signal S9 at the output terminal 40 was measured. This attenuation ratio is defined as an isolation characteristic S30B.

  In addition to this, in the simulation, the attenuation ratio (isolation characteristic) of the signal S10 entering the coil 18 from the output terminal 41, wrapping around the coil 24 via the coil 14, and exiting to the output terminal 44 of the coil 28 was measured. . Specifically, the ratio of the intensity of the signal S10 at the output terminal 44 to the intensity of the signal S10 connected to the output terminal 41 was measured. This attenuation ratio is defined as an isolation characteristic S41B.

  FIG. 13 shows the results of a simulation performed using the third model. In FIG. 13, the vertical axis shows the signal attenuation ratio (isolation characteristic), and the horizontal axis shows the frequency. .

  As shown in FIG. 13, in the third model, the attenuation at each frequency of the signal S9 and the signal S10 is substantially equal, and has a large attenuation pole in the vicinity of 1000 (MHz). Further, the attenuation ratio at the pole of the isolation characteristic S30B is substantially equal to the attenuation ratio at the pole of the isolation characteristic S41B. This shows an isolation characteristic with good balance that the electronic component 1B has.

(Refer to FIG. 14 for the third modification)
As shown in FIG. 14, the difference between the electronic component 1 </ b> C according to the third modified example and the electronic component 1 is that the terminals that were the output terminals 40 and 43 in the electronic component 1 are connected to the ground electrode, and the electronic component 1. The balanced signal is output from the terminals which are the ground terminals 42 and 45 in FIG. Other configurations of the electronic component 1 </ b> C are the same as those of the electronic component 1. Therefore, the description other than the connection relationship of the terminals is as described in the electronic component 1.

(Other examples)
The electronic component and the electronic circuit according to the present invention are not limited to the above-described embodiments, and can be variously modified within the scope of the gist thereof. For example, in the first embodiment and the first to third modifications, the input terminals 30 and 32, the output terminals 40, 41, 43, and 44 and the ground terminals 42 and 45 are not limited to the arrangement as shown in FIG. For example, the ground terminal 42, the input terminals 30 and 32, and the ground terminal 45 are arranged in the order of the input terminal 30, the ground terminal 42, the ground terminal 45, and the input terminal 32 from the negative direction side to the positive direction side in the x-axis direction. In addition, the laminated body 8 may be provided on the side surface on the negative direction side in the y-axis direction. The laminated body 8 may be provided on the side surface on the positive side in the y-axis direction so that the terminal 41, the output terminal 44, and the output terminal 43 are arranged in this order. Further, as shown in FIG. 3, the coils need not be arranged in the order of the coil 14, the coil 12, the coil 22, and the coil 24 from the negative z-axis direction to the positive direction. , Coil 12, coil 14, coil 24, and coil 22 may be arranged in this order.

  The number of coils included in each balun is not limited to two or four, but may be three or more. Further, the number of baluns may be two or more according to the number of dividing the unbalanced input. Furthermore, as long as each balun is electromagnetically coupled and the magnetic fluxes generated by the input signals are arranged to cancel each other, all the coils in each balun may be arranged on the same plane.

  Furthermore, in the electronic components 1, 1A, 1B, and 1C, the input terminal 30 and the input terminal 32 may be configured by one input terminal. In this case, it is not necessary to branch the conducting wire 102 in the electronic circuit 100.

  In the electronic component 1B, the input terminals 30, 32, the output terminals 40, 41, 43, 44, the ground are output so that the balanced signals are output from the coils 14 and 18, and the balanced signals are output from the coils 24, 28. Terminals 42 and 45 may be connected. Specifically, the output terminals 40 and 43 are grounded. Then, a signal having the same phase as the unbalanced signal is output from the terminal that was the ground terminal 42, and a signal having an opposite phase to the unbalanced signal is output from the output terminal 41. A signal having the same phase as the unbalanced signal is output from the terminal that was the ground terminal 45, and a signal having an opposite phase to the unbalanced signal is output from the output terminal 44.

  As described above, the present invention is useful for electronic components and electronic circuits that distribute unbalanced signals and convert unbalanced signals into balanced signals, and can reduce the number of components and achieve miniaturization. Is excellent.

B1 to B10 Magnetic flux S1, S2 Unbalanced signal 1, 1A, 1B, 1C Electronic parts 12, 14, 16, 18, 22, 24, 26, 28 Coils (first coil to eighth coil)
10,20 balun (unbalanced balance converter)
30, 32 Input terminal 100 Electronic circuit 102 Conductive wires 102a-102c Ends (first end (unbalanced signal input terminal), second end, third end)

Claims (9)

An unbalanced signal input terminal;
A first output terminal;
A second output terminal;
A third output terminal;
A fourth output terminal;
Wherein a first coil and a first unbalance balanced converter comprising the first coil and the third coil electromagnetically coupled input terminal electrically connected to an unbalanced signal, the first A first unbalanced balanced converter that outputs a balanced signal from the first output terminal and the second output terminal ;
Wherein a second unbalance balanced converter including a second coil and the second coil and the fourth coil electromagnetically coupled input terminal electrically connected to an unbalanced signal, the second A second unbalanced-balanced converter that outputs a balanced signal from the third output terminal and the fourth output terminal ;
With
The first coil and the second coil are arranged such that magnetic fluxes generated by the unbalanced signal cancel each other;
Electronic parts characterized by The first coil and the second coil are stacked such that the central axes of the coils substantially coincide;
The electronic component according to claim 1 . The first coil and the second coil are located on the same plane so that the axial directions of the coils substantially coincide;
The electronic component according to claim 1 . Before SL from the first coil and the third coil is output balanced signals,
A balanced signal is output from the second coil and the fourth coil;
The electronic component according to any one of claims 1 to 3 , wherein: Before Symbol balanced signal from both ends of the third coil is output,
A balanced signal is output from both ends of the fourth coil;
The electronic component according to any one of claims 1 to 3 , wherein: A first unbalanced balanced converter including a first coil electrically connected to an input terminal of the unbalanced signal;
A second unbalanced and balanced converter including a second coil electrically connected to the input terminal of the unbalanced signal;
With
The first unbalanced balanced converter and the second unbalanced balanced converter are electromagnetically coupled to each other, and are arranged such that magnetic fluxes generated by the unbalanced signal cancel each other.
Wherein the first unbalanced balanced converter, the first coil and the fifth coil connected in series, a third series with the coil of the coil and the third to the coil electromagnetically coupled said first A sixth coil connected and electromagnetically coupled to the fifth coil;
The second unbalanced balanced converter, said second coil and the seventh coil connected in series, the coil in series with the fourth coil and said 4 to electromagnetically coupled with said second coil An eighth coil connected and electromagnetically coupled to the seventh coil;
The first coil and the second coil are arranged so that they are electromagnetically coupled to each other, and magnetic fluxes generated by input signals inputted to them are canceled out each other,
The sixth coil and the eighth coil are arranged so as to be electromagnetically coupled to each other and magnetic fluxes generated by input signals input to them are canceled out from each other;
It shall be the feature of the electronic components. Balance signals are output from the fifth coil and the sixth coil,
A balanced signal is output from the seventh coil and the eighth coil;
The electronic component according to claim 6 . Balance signals are output from the third coil and the sixth coil,
A balanced signal is output from the fourth coil and the eighth coil;
The electronic component according to claim 6 . An electronic component according to any one of claims 1 to 8 ,
First end unbalanced input signal is input, the first second end connected with the unbalanced to balanced converter, and a is connected to the second unbalanced balanced converter A conducting wire having three ends;
Providing
An electronic circuit characterized by

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