CN211879159U - Inductance for improving self-resonant frequency - Google Patents
Inductance for improving self-resonant frequency Download PDFInfo
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- CN211879159U CN211879159U CN202020456492.6U CN202020456492U CN211879159U CN 211879159 U CN211879159 U CN 211879159U CN 202020456492 U CN202020456492 U CN 202020456492U CN 211879159 U CN211879159 U CN 211879159U
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Abstract
The utility model discloses an inductance for improving self-resonant frequency, which comprises N circles of cables, 2N cable units and a plurality of connecting cables; the N coils of cables are arranged in a winding area, and the winding area comprises a first winding area and a second winding area; the first winding area comprises a first outer area and a first inner area; the second winding area comprises a second outer area and a second inner area; in the first winding area, the first-winding set part of the cable units is positioned in a first outer area of the first winding area, and the second-winding set part of the cable units is positioned in a first inner area of the first winding area; in the second winding area, the cable unit of the set part which is wound firstly is positioned in the second inner area of the second winding area, and the cable unit of the set part which is wound later is positioned in the second outer area of the second winding area. The utility model discloses can show the self-resonant frequency who improves the inductance under the condition is worth not changing inductance value, inductance area and inductance Q completely, can reduce the consumption and improve phase noise simultaneously.
Description
Technical Field
The utility model belongs to the technical field of communication system, a inductance is related to, especially, relate to an improve inductance from resonant frequency.
Background
Modern communication systems have increasingly high demands on frequency resources, particularly in terms of increasingly wide frequency range requirements and increasingly high phase noise requirements. The self-resonant frequency, which is an important parameter of the inductance, affects the magnitude of the change in inductance in the useful frequency range. In particular, the higher the self-resonant frequency, the smaller the change in inductance value in the useful frequency range. And the variation in inductance values needs to be compensated for by the variable range of the capacitor array. Therefore, the minimum inductance variation range is desired for the advanced frequency synthesizer.
The winding method of the conventional differential inductor uses 4-turn inductor as an example. As shown in fig. 1, in the conventional winding method for 4-turn differential inductor, a thick solid portion is generally wound by using the thickest metal layer in the process, and then a thick dotted portion is wound by using a metal layer with a second equal thickness. The capacitance portion in the figure is the parasitic capacitance between the inductor coils. From the physical properties of the capacitor, the magnitude is only related to the length of the wires, the distance between the wires and the dielectric constant of the material between the wires. In the course of this patent's principle, the material of all the exemplary wires, the distance between the wires and the dielectric constant of the material between the wires are the same.
Fig. 2 is a simplified model of a conventional 4-turn differential inductor in a segmented manner. The trend of the voltage signal change from left to right is shown in fig. 3. For parasitic capacitance C0, the voltage across it is + -Vin/2, as can be derived from the well-known Miller effect in circuit analysis, and the equivalent capacitance across the inductor is 2C0. In the analysis method of the document 1, Behzad razavi, radio frequency microelectronics (second edition), english edition, page 462, assuming that the inductor in fig. 1 is equally divided into 8 segments, the voltage signal thereon is equally divided into 8 segments from left to right, and the capacitances between the lines are also assumed to be equal in capacitance value and are all C, according to the analysis method in the document 1, the equivalent capacitance obtained by the traditional 4-turn inductor is C
The fundamental reason for this analysis method is that the larger the difference between the voltage signals at the two ends of the capacitor, the larger the proportion of the voltage signals in the whole system (the capacitor with the same capacitance value).
In view of the above, there is a need to design a new inductor structure to overcome at least some of the above-mentioned drawbacks of the existing inductor structures.
SUMMERY OF THE UTILITY MODEL
The utility model provides an improve self-resonant frequency's inductance can be under the condition of not changing inductance value (Ls) completely, inductance area and inductance Q are worth the circumstances, are showing the self-resonant frequency who improves the inductance.
For solving the technical problem, according to the utility model discloses an aspect adopts following technical scheme:
an inductor for improving self-resonant frequency comprises N circles of cables, 2N cable units and a plurality of connecting cables are formed; the N coils of cables are arranged in a winding area, and the winding area comprises a first winding area and a second winding area;
the first winding area comprises a first outer area and a first inner area, the first outer area is close to the outer side of the first winding area, and the first inner area is close to the outer side of the first winding area;
the second winding area comprises a second outer area and a second inner area; the second outer area is close to the outer side of the second winding area, and the second inner area is close to the outer side of the second winding area;
in the first winding area, the first-winding set part of the cable units is positioned in a first outer area of the first winding area, and the second-winding set part of the cable units is positioned in a first inner area of the first winding area;
in the second winding area, the cable unit of the set part which is wound firstly is positioned in the second inner area of the second winding area, and the cable unit of the set part which is wound later is positioned in the second outer area of the second winding area.
As an embodiment of the present invention, in the first winding area, half of the cable units that are wound first are located in the first outer area of the first winding area, and half of the cable units that are wound later are located in the first inner area of the first winding area;
in the second winding area, half of the cable units that are wound first are located in a second inner area of the second winding area, and half of the cable units that are wound later are located in a second outer area of the second winding area.
As an embodiment of the present invention, the inductor includes four turns of inductor cables, forming eight cable units and a plurality of connection cables; the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit;
the first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are sequentially connected through connecting cables;
the first cable unit, the third cable unit, the fifth cable unit and the seventh cable unit are sequentially arranged from outside to inside, and the second cable unit, the fourth cable unit, the sixth cable unit and the eighth cable unit are sequentially arranged from inside to outside.
As an embodiment of the present invention, the first cable unit is connected to a positive power supply, and the eighth cable unit is connected to a negative power supply;
the first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the fifth cable unit and the fourth cable unit form a secondary inner ring, and the seventh cable unit and the second cable unit form an innermost ring;
the first cable unit and the eighth cable unit are symmetrically arranged, and the third cable unit and the sixth cable unit are symmetrically arranged; the fifth cable unit and the fourth cable unit are symmetrically arranged, and the seventh cable unit and the second cable unit are symmetrically arranged.
As an embodiment of the present invention, the inductor includes four turns of inductor cables, forming eight cable units and a plurality of connection cables; the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit;
the first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are sequentially connected through connecting cables;
the first cable unit, the third cable unit, the seventh cable unit and the fifth cable unit are sequentially arranged from outside to inside, and the fourth cable unit, the second cable unit, the sixth cable unit and the eighth cable unit are sequentially arranged from inside to outside.
As an embodiment of the present invention, the first cable unit is connected to a positive power supply, and the eighth cable unit is connected to a negative power supply;
the first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the seventh cable unit and the second cable unit form a secondary inner ring, and the fifth cable unit and the fourth cable unit form an innermost ring;
the first cable unit and the eighth cable unit are symmetrically arranged, and the third cable unit and the sixth cable unit are symmetrically arranged; the seventh cable unit and the second cable unit are symmetrically arranged, and the fifth cable unit and the fourth cable unit are symmetrically arranged.
The beneficial effects of the utility model reside in that: the utility model provides an improvement self-resonant frequency's inductance can be under the condition of not changing inductance value (Ls) completely, and inductance area and inductance Q are worth the circumstances, are showing the self-resonant frequency who improves the inductance. The utility model discloses a reduce capacitor array's coverage and remove the Q value that improves capacitor array to realize reducing the consumption and improve the phase noise.
Drawings
Fig. 1 is a schematic diagram of a conventional winding method for 4-turn differential inductor.
Fig. 2 is a schematic diagram of a conventional 4-turn differential inductance section model (without considering resistance effect).
Fig. 3 is a schematic diagram illustrating a voltage variation trend of the inductor signal.
Fig. 4 is a schematic diagram of a winding method for four differential inductors according to an embodiment of the present invention.
Fig. 5 is a diagram illustrating a corresponding differential inductance segment model of fig. 4 (without considering the resistance effect).
Fig. 6 is a schematic diagram of a winding method of a four-turn differential inductor according to another embodiment of the present invention.
Fig. 7 is a diagram illustrating a corresponding differential inductance segment model of fig. 6 (without considering the resistance effect).
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For further understanding of the present invention, preferred embodiments of the present invention will be described below with reference to examples, but it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the claims of the present invention.
The description in this section is for exemplary embodiments only, and the present invention is not limited to the scope of the embodiments described. The same or similar prior art means and some technical features of the embodiments are mutually replaced and are also within the scope of the description and the protection of the invention.
In the specification, the cable enclosing a circle means that the cable is substantially a circle and is not limited to a complete circle.
The utility model discloses an inductance for improving self-resonant frequency, which comprises N circles of cables, and 2N cable units and a plurality of connecting cables are formed; the N-coil cable is arranged in a winding area, and the winding area comprises a first winding area and a second winding area. The first winding area comprises a first outer area and a first inner area, the first outer area is close to the outer side of the first winding area, and the first inner area is close to the outer side of the first winding area; the second winding area comprises a second outer area and a second inner area; the second outer region is adjacent to the outside of the second winding region, and the second inner region is adjacent to the outside of the second winding region. In the first winding area, the first-winding set part of the cable units is positioned in a first outer area of the first winding area, and the second-winding set part of the cable units is positioned in a first inner area of the first winding area; in the second winding area, the cable unit of the set part which is wound firstly is positioned in the second inner area of the second winding area, and the cable unit of the set part which is wound later is positioned in the second outer area of the second winding area.
In an embodiment of the present invention, in the first winding area, half of the cable units that are wound first are located in a first outer area of the first winding area, and half of the cable units that are wound later are located in a first inner area of the first winding area; in the second winding area, half of the cable units that are wound first are located in a second inner area of the second winding area, and half of the cable units that are wound later are located in a second outer area of the second winding area. In one embodiment, half of this means a rounding of N/2.
Fig. 6 is a schematic diagram of a winding method for four differential inductors according to another embodiment of the present invention; referring to fig. 6, in an embodiment of the present invention, the inductor includes four turns of inductor cables, forming eight cable units and a plurality of connection cables; the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit.
The first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are sequentially connected through connecting cables; the first cable unit, the third cable unit, the fifth cable unit and the seventh cable unit are sequentially arranged from outside to inside, and the second cable unit, the fourth cable unit, the sixth cable unit and the eighth cable unit are sequentially arranged from inside to outside.
In an embodiment of the present invention, the first cable unit is connected to the positive power supply, and the eighth cable unit is connected to the negative power supply. The first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the fifth cable unit and the fourth cable unit form a secondary inner ring, and the seventh cable unit and the second cable unit form an innermost ring. The first cable unit and the eighth cable unit are symmetrically arranged, and the third cable unit and the sixth cable unit are symmetrically arranged; the fifth cable unit and the fourth cable unit are symmetrically arranged, and the seventh cable unit and the second cable unit are symmetrically arranged.
Fig. 4 is a schematic diagram of a winding method for four differential inductors according to an embodiment of the present invention; referring to fig. 4, in an embodiment of the present invention, the inductor includes four turns of inductor cables, forming eight cable units and a plurality of connection cables; the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit. The first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are sequentially connected through connecting cables; the first cable unit, the third cable unit, the seventh cable unit and the fifth cable unit are sequentially arranged from outside to inside, and the fourth cable unit, the second cable unit, the sixth cable unit and the eighth cable unit are sequentially arranged from inside to outside.
In one embodiment, the first cable unit is connected with a positive power supply pole, and the eighth cable unit is connected with a negative power supply pole; the first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the seventh cable unit and the second cable unit form a secondary inner ring, and the fifth cable unit and the fourth cable unit form an innermost ring. The first cable unit and the eighth cable unit are symmetrically arranged, and the third cable unit and the sixth cable unit are symmetrically arranged; the seventh cable unit and the second cable unit are symmetrically arranged, and the fifth cable unit and the fourth cable unit are symmetrically arranged.
The utility model discloses an improve self-resonant frequency's inductance wire winding method, with the inductance cable at setting for the regional N circle of winding of wire winding, form 2N cable units and a plurality of connecting cable, each cable unit connects gradually through the connecting cable that corresponds. The winding area comprises a first winding area and a second winding area; in the first winding area, half of the cable units that are wound first are located in the outer area of the first winding area, and half of the cable units that are wound later are located in the inner area of the first winding area. In the second winding area, half of the cable units which are firstly wound are positioned in the inner area of the second winding area, and half of the cable units which are secondly wound are positioned in the outer area of the second winding area.
Fig. 4 is a schematic diagram of a winding method for four differential inductors according to an embodiment of the present invention; referring to fig. 4, in an embodiment of the present invention, the inductance winding method includes: winding the inductance cable into four circles to form eight cable units and a plurality of connecting cables, wherein the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit; the first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are connected through connecting cables in sequence. Winding the wire in the first winding area to form a first cable unit; winding the wire in the second winding area to form a second cable unit; winding the inner side of the first cable unit in the first winding area to form a third cable unit; winding the inner side of the second cable unit in the second winding region to form a fourth cable unit; winding the inner side of the third cable unit in the first winding area to form a fifth cable unit; winding the outer side of the second cable unit in the second winding area to form a sixth cable unit; winding wires between the third cable unit and the fifth cable unit in the first winding area to form a seventh cable unit; and winding the wire outside the sixth cable unit in the second winding area to form an eighth cable unit.
Referring to fig. 4, in an embodiment of the present invention, the first cable unit is connected to a positive electrode of a power supply, and the eighth cable unit is connected to a negative electrode of the power supply; the first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the seventh cable unit and the second cable unit form a secondary inner ring, and the fifth cable unit and the fourth cable unit form an innermost ring; the first cable unit, the third cable unit, the seventh cable unit and the fifth cable unit are sequentially arranged from outside to inside; and the eighth cable unit, the sixth cable unit, the second cable unit and the fourth cable unit are sequentially arranged from outside to inside.
In an embodiment of the present invention, the first cable unit and the eighth cable unit may be symmetrically disposed, and the third cable unit and the sixth cable unit may be symmetrically disposed; the seventh cable unit and the second cable unit may be symmetrically disposed, and the fifth cable unit and the fourth cable unit may be symmetrically disposed.
The utility model discloses the same wire winding area of aim at, almost equal length, under same line width and the distance between same line and the line, guarantee under the almost unchangeable condition of inductance Q value, show to improve self-resonant frequency. FIG. 4 is a simplified equivalent model of the corresponding winding method shown in FIG. 5; the voltage variation trend of the inductive signal is the same as that of the inductor of the traditional winding method. Since each item parameter of inductance coils is the same with traditional inductance winding method, therefore all assumptions in the first section are in the utility model discloses in the same true. Therefore, according to the method described in reference [ 1 ], the equivalent capacitance obtained by 4-turn inductors in an embodiment of the present invention is
Of course, in practical situations, the capacitance reduction is not so obvious, but the trend is indeed that the new winding method can obtain smaller parallel equivalent capacitance, and thus higher self-resonant frequency. A specific numerical comparison of the self-resonant frequencies will be detailed in the figures. Compared with the traditional inductance winding method, the inductance winding method has the following characteristics:
(1) the area, the winding resource, the line width and the distance between the connecting lines are the same as those of the traditional differential inductance winding method. The traditional differential inductor can be perfectly replaced in physics, and the original layout design can be seamlessly butted.
(2) The inductance (Ls) and the Q of the inductor are almost identical to those of the conventional differential winding method. The frequency synthesizer is perfectly compatible with the frequency synthesizer with the traditional design.
(3) The inductance results from the resonance frequency being significantly higher than the inductance that is wound out by the conventional differential inductance winding method. Under the condition of not changing the original design, the frequency coverage of the frequency synthesizer is further expanded, and the robustness of the original design is enhanced. If the coverage range of the original frequency is kept unchanged, the coverage range of the capacitor array of the original frequency synthesizer can be reduced, a higher Q value of the resonant network can be obtained generally, and therefore phase noise of the frequency synthesizer is improved, and power consumption of the whole frequency synthesizer is reduced.
Fig. 6 is a schematic diagram of a winding method for four differential inductors according to another embodiment of the present invention; referring to fig. 6, in an embodiment of the present invention, the inductance winding method includes: winding the inductance cable into four circles to form eight cable units and a plurality of connecting cables, wherein the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit; the first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are connected through connecting cables in sequence.
Winding the wire in the first winding area to form a first cable unit; and winding the wire in the second winding area to form a second cable unit. Winding the inner side of the first cable unit in the first winding area to form a third cable unit; the outer side of the second cable unit is wound in the second winding region to form a fourth cable unit. Winding the inner side of the third cable unit in the first winding area to form a fifth cable unit; and winding the outer side of the second cable unit in the second winding area to form a sixth cable unit. Winding the inner side of the fifth cable unit in the first winding area to form a seventh cable unit; and winding the outer side of the sixth cable unit in the second winding area to form an eighth cable unit.
In an embodiment of the present invention, the first cable unit is connected to a positive power supply, and the eighth cable unit is connected to a negative power supply; the first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the fifth cable unit and the fourth cable unit form a secondary inner ring, and the seventh cable unit and the second cable unit form an innermost ring; the first cable unit, the third cable unit, the fifth cable unit and the seventh cable unit are sequentially arranged from outside to inside; and the eighth cable unit, the sixth cable unit, the fourth cable unit and the second cable unit are sequentially arranged from outside to inside.
In an embodiment of the present invention, the first cable unit and the eighth cable unit are symmetrically disposed, and the third cable unit and the sixth cable unit are symmetrically disposed; the fifth cable unit and the fourth cable unit are symmetrically arranged, and the seventh cable unit and the second cable unit are symmetrically arranged.
Obey the principle of the utility model, can see that the way of figure 6 is more radical, can bypass out the inductance that self-resonance frequency is higher. According to the inductance shown in fig. 3, the equivalent parallel capacitance can be calculated as the value of the parallel capacitance by the method described in the reference [ 1 ]
Therefore, the winding method necessarily has higher self-resonant frequency. The thicknesses are different in figure 6 of the drawings,the different line types are all regarded as different metal layers.
To sum up, the utility model provides an improve self-resonant frequency's inductance can be showing the self-resonant frequency who improves the inductance under the condition of not changing inductance value (Ls) completely, inductance area and inductance Q are worth the condition. The utility model discloses a reduce capacitor array's coverage and remove the Q value that improves capacitor array to realize reducing the consumption and improve the phase noise.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the present invention are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Effects or advantages referred to in the embodiments may not be reflected in the embodiments due to interference of various factors, and the description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the present invention.
Claims (6)
1. An inductor for improving self-resonant frequency is characterized by comprising N circles of cables, 2N cable units and a plurality of connecting cables are formed; the N coils of cables are arranged in a winding area, and the winding area comprises a first winding area and a second winding area;
the first winding area comprises a first outer area and a first inner area, the first outer area is close to the outer side of the first winding area, and the first inner area is close to the outer side of the first winding area;
the second winding area comprises a second outer area and a second inner area; the second outer area is close to the outer side of the second winding area, and the second inner area is close to the outer side of the second winding area;
in the first winding area, the first-winding set part of the cable units is positioned in a first outer area of the first winding area, and the second-winding set part of the cable units is positioned in a first inner area of the first winding area;
in the second winding area, the cable unit of the set part which is wound firstly is positioned in the second inner area of the second winding area, and the cable unit of the set part which is wound later is positioned in the second outer area of the second winding area.
2. The inductor of claim 1, wherein:
in the first winding area, half of the cable units which are firstly wound are positioned in a first outer area of the first winding area, and half of the cable units which are secondly wound are positioned in a first inner area of the first winding area;
in the second winding area, half of the cable units that are wound first are located in a second inner area of the second winding area, and half of the cable units that are wound later are located in a second outer area of the second winding area.
3. The inductor of claim 1, wherein:
the inductor comprises four turns of inductor cables to form eight cable units and a plurality of connecting cables; the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit;
the first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are sequentially connected through connecting cables;
the first cable unit, the third cable unit, the fifth cable unit and the seventh cable unit are sequentially arranged from outside to inside, and the second cable unit, the fourth cable unit, the sixth cable unit and the eighth cable unit are sequentially arranged from inside to outside.
4. An inductor according to claim 3, wherein:
the first cable unit is connected with the positive pole of a power supply, and the eighth cable unit is connected with the negative pole of the power supply;
the first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the fifth cable unit and the fourth cable unit form a secondary inner ring, and the seventh cable unit and the second cable unit form an innermost ring;
the first cable unit and the eighth cable unit are symmetrically arranged, and the third cable unit and the sixth cable unit are symmetrically arranged; the fifth cable unit and the fourth cable unit are symmetrically arranged, and the seventh cable unit and the second cable unit are symmetrically arranged.
5. The inductor of claim 1, wherein:
the inductor comprises four turns of inductor cables to form eight cable units and a plurality of connecting cables; the eight cable units are respectively a first cable unit, a second cable unit, a third cable unit, a fourth cable unit, a fifth cable unit, a sixth cable unit, a seventh cable unit and an eighth cable unit;
the first cable unit, the second cable unit, the third cable unit, the fourth cable unit, the fifth cable unit, the sixth cable unit, the seventh cable unit and the eighth cable unit are sequentially connected through connecting cables;
the first cable unit, the third cable unit, the seventh cable unit and the fifth cable unit are sequentially arranged from outside to inside, and the fourth cable unit, the second cable unit, the sixth cable unit and the eighth cable unit are sequentially arranged from inside to outside.
6. An inductor according to claim 5, wherein:
the first cable unit is connected with the positive pole of a power supply, and the eighth cable unit is connected with the negative pole of the power supply;
the first cable unit and the eighth cable unit form an outermost ring, the third cable unit and the sixth cable unit form a secondary outer ring, the seventh cable unit and the second cable unit form a secondary inner ring, and the fifth cable unit and the fourth cable unit form an innermost ring;
the first cable unit and the eighth cable unit are symmetrically arranged, and the third cable unit and the sixth cable unit are symmetrically arranged; the seventh cable unit and the second cable unit are symmetrically arranged, and the fifth cable unit and the fourth cable unit are symmetrically arranged.
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| CN202020456492.6U CN211879159U (en) | 2020-04-01 | 2020-04-01 | Inductance for improving self-resonant frequency |
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| CN202020456492.6U CN211879159U (en) | 2020-04-01 | 2020-04-01 | Inductance for improving self-resonant frequency |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |