Adjustable integrated stereo inductor and LC filter

Abstract

The present invention provides an adjustable integrated stereo inductor and an LC filter, which is applied to the technical field of electronic components, including: the adjustable integrated stereo inductor is integrated in a circuit board, including: a basic inductor, a fine-tuning inductor and an adjustable line segment integrated on the circuit board; the fine-tuning inductor is connected to the basic inductor through the adjustable line segment with a preset connection structure. The adjustable integrated stereo inductor provided by the present invention can achieve fine-tuning of the stereo inductor, thereby eliminating the influence of the inductance value error of the stereo inductor on the actual circuit application.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic components, and more specifically, relates to an adjustable integrated three-dimensional inductor and an LC filter. Background Art

[0002] As one of the circuit components, inductors are widely used in various fields, and there are many forms such as lumped inductors, integrated planar inductors, and integrated three-dimensional inductors. Most of the existing known inductors are planar inductors, which are designed with the inductor pattern and the circuit pattern on the same plane. However, when the inductor and the circuit are on the same plane, the problem of parasitic capacitance must be overcome, which will make the chip size unable to be reduced. Therefore, the demand for three-dimensional inductors arises.

[0003] However, the errors generated in the actual production of three-dimensional inductors cannot meet the requirements of practical applications for the inductance value of three-dimensional inductors. Therefore, how to eliminate the impact of the inductance value error of three-dimensional inductors on actual circuit applications has become a problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable integrated three-dimensional inductor to solve the technical problem existing in the prior art of how to eliminate the influence of the inductance value error of the three-dimensional inductor on the actual circuit application.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] Provided is an adjustable integrated three-dimensional inductor, which is integrated in a circuit board and includes: a basic inductor and a fine-tuning inductor integrated on the circuit board;

[0007] The fine-tuning inductor is connected to the basic inductor in a preset connection structure.

[0008] Optionally, the preset connection structure includes an extended-range structure;

[0009] In the range-extending structure, at least one fine-tuning inductor is included, and the fine-tuning inductor in the range-extending structure is connected to the basic inductor for range extension.

[0010] Optionally, when the number of fine-tuning inductors in the range-extending structure is more than one, the fine-tuning inductors in the range-extending structure are connected to each other in an extended-range manner.

[0011] Optionally, the preset connection structure includes a parallel structure;

[0012] In the parallel structure, at least one fine-tuning inductor is included, and the fine-tuning inductor in the parallel structure is connected in parallel with the basic inductor.

[0013] Optionally, when the number of the fine-tuning inductors in the parallel structure is more than one, the fine-tuning inductors in the parallel structure are connected in parallel.

[0014] Optionally, the preset connection structure includes a hybrid structure;

[0015] The hybrid structure includes at least two fine-tuning inductors, each of which is connected to the other in an extended-range manner, and the fine-tuning inductor in the hybrid structure is connected in parallel with the basic inductor.

[0016] Optionally, the preset connection structure includes a hybrid structure;

[0017] The hybrid structure includes at least two fine-tuning inductors, each of which is connected in parallel, and the fine-tuning inductors in the hybrid structure are connected to the basic inductor in an extended-range manner.

[0018] Optionally, it further includes an adjustable line segment, wherein the adjustable line segment is a line segment formed by connecting a pad on the circuit board and an inductor on the circuit board;

[0019] The fine-tuning inductor is connected to the basic inductor through the pad and the adjustable line segment.

[0020] Optionally, the basic inductor is provided with a first lead-out terminal and a second lead-out terminal, and the fine-tuning inductor is provided with a third lead-out terminal and a fourth lead-out terminal;

[0021] The third lead-out terminal of the fine-tuning inductor is directly connected to the first lead-out terminal of the basic inductor;

[0022] The second lead-out terminal of the basic inductor is connected to the pad on the circuit board;

[0023] The fourth lead-out terminal of the fine-tuning inductor is connected to the pad on the circuit board;

[0024] Wherein, the line segment between the second lead-out terminal of the basic inductor and the pad, and the line segment between the fourth lead-out terminal of the fine-tuning inductor and the pad are both adjustable line segments.

[0025] A second aspect of the embodiments of the present invention provides an LC filter, comprising any one of the above-mentioned adjustable integrated three-dimensional inductors.

[0026] The beneficial effect of the adjustable integrated three-dimensional inductor provided by the present invention is that the adjustable integrated three-dimensional inductor provided by the embodiment of the present invention achieves fine-tuning of the basic inductance by adding adjustable line segments and fine-tuning inductors, thereby effectively eliminating the influence of the inductance value error of the three-dimensional inductor on the actual circuit application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of an adjustable integrated three-dimensional inductor provided by an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of a range-extending structure of an adjustable integrated three-dimensional inductor provided in one embodiment of the present invention;

[0030] Figure 3 A schematic diagram of a range-extending structure of an adjustable integrated three-dimensional inductor provided in another embodiment of the present invention;

[0031] Figure 4 A schematic diagram of a parallel structure of an adjustable integrated three-dimensional inductor provided in one embodiment of the present invention;

[0032] Figure 5 A schematic diagram of a parallel structure of an adjustable integrated three-dimensional inductor provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of an adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, Figure 1 In the figure, 101 represents a pad on a circuit board. The adjustable integrated three-dimensional inductor is integrated on a circuit board, and comprises: a basic inductor 200 and a fine-tuning inductor 300 integrated on the circuit board 100 .

[0036] The fine-tuning inductor 300 is connected to the basic inductor 200 in a predetermined connection structure.

[0037] In this embodiment, the preset connection structure includes but is not limited to an extended-range structure, a parallel structure, and a hybrid structure. The extended-range structure means that the connection mode of the inductor (basic inductor 200 and fine-tuning inductor 300) on the circuit board 100 is extended-range; the parallel structure means that the connection mode of the inductor (basic inductor 200 and fine-tuning inductor 300) on the circuit board 100 is parallel; the hybrid structure means that the connection mode of the inductor (basic inductor 200 and fine-tuning inductor 300) on the circuit board 100 includes both extended-range and parallel. Among them, the first end of the basic inductor 200 is connected to the first end of the fine-tuning inductor 300 through a connecting strip, and the second end of the basic inductor 200 is connected to the second end of the fine-tuning inductor 300 through a pad 101 and two branches (that is, adjustable line segments 400) extending from the pad 101.

[0038] In this embodiment, the adjustment of the three-dimensional inductance value can be achieved by cutting the adjustable line segment 400 .

[0039] In this embodiment, the difference between the extended-range structure and the parallel structure is that the principles of adjusting the inductance are different. In the extended-range structure, the inductance of the stereo inductor 300 is much smaller than the inductance of the basic inductor 200. After cutting off the adjustable line segment 400, it is equivalent to disconnecting the path with a smaller inductance, thereby increasing the inductance of the stereo inductor. In the parallel structure, the inductance of the stereo inductor 300 is basically the same as the inductance of the basic inductor 200. After cutting off the adjustable line segment 400, it is equivalent to disconnecting one of the two parallel paths, thereby increasing the inductance of the stereo inductor.

[0040] From the above description, it can be seen that the adjustable integrated three-dimensional inductor provided in the embodiment of the present invention achieves fine adjustment of the basic inductance by adding an adjustable line segment and a fine-tuning inductor, thereby effectively eliminating the influence of the inductance value error of the three-dimensional inductor on the actual circuit application. Furthermore, the inductance of various levels can be adjusted by selecting different inductor connection methods.

[0041] Optionally, refer to Figure 2 , as a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, the preset connection structure includes a range-extending structure 10;

[0042] The range-extending structure 10 includes at least one fine-tuning inductor 300 , and the fine-tuning inductor 300 in the range-extending structure is connected to the basic inductor 200 for range extension.

[0043] In this embodiment, the fine-tuning inductor 300 is connected to the basic inductor 200 through the pad 101 and two branches (i.e., two adjustable segments 400) extending from the pad 101, and the fine-tuning of the inductor can be achieved by interrupting any of the adjustable segments 400. The fine-tuning inductor 300 is connected to the basic inductor 200 for an extended range, and interrupting the adjustable segment 400 actually increases the distance that the current flows through the inductor, which belongs to the extended range adjustment.

[0044] Optionally, as a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, when the number of fine-tuning inductors in the range-extending structure is more than one, the fine-tuning inductors in the range-extending structure are connected to each other in an extended-range manner.

[0045] In this embodiment, in order to increase the adjustment order of the inductance in the range-extending structure, this can be achieved by increasing the number of fine-tuning inductors.

[0046] Among them, reference Figure 2 In the range-extending structure 10 , when there is a fine-tuning inductor 300 , the basic inductor 200 and the fine-tuning inductor 300 extend the range, that is, one end of the basic inductor 200 is directly connected to one end of the fine-tuning inductor 300 through a connecting strip, and the other end of the basic inductor 200 and the other end of the fine-tuning inductor 300 are located on the same pad 101 .

[0047] In the extended range structure 11, reference Figure 3 When there are two fine-tuning inductors 300, the basic inductor 200 and the fine-tuning inductor 300 are extended, that is, the first end of the basic inductor 200 is directly connected to the first end of the first fine-tuning inductor 301 through a connecting strip (this connection point is recorded as the first connection point), and the first end of the second fine-tuning inductor 302 is directly connected to the first end of the first fine-tuning inductor 31 through a connecting strip (this connection point is recorded as the second connection point). Among them, the first connection point and the second connection point can be the same or different. The second end of the basic inductor 200, the second end of the first fine-tuning inductor 301, and the second end of the second fine-tuning inductor 302 are all located on the same pad 101 (that is, the three are connected through the pad 101 and the branches extending from the pad 101).

[0048] Furthermore, in the range-extending structure, when there are more than two fine-tuning inductors 300, the range-extending method of the basic inductor 200 and the fine-tuning inductor 300 is similar to the range-extending method of the basic inductor 200 and the fine-tuning inductor 300 when there are two fine-tuning inductors 300, and will not be repeated here.

[0049] Optionally, refer to Figure 4 As a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, the preset connection structure includes a parallel structure.

[0050] The parallel structure 20 includes at least one fine-tuning inductor, and the fine-tuning inductor in the parallel structure is connected in parallel with the basic inductor.

[0051] In this embodiment, the fine-tuning inductor 300 is connected in parallel with the basic inductor 200 to achieve fine-tuning of the inductance.

[0052] Optionally, as a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, when the number of fine-tuning inductors in the parallel structure is more than one, the fine-tuning inductors in the parallel structure are connected in parallel.

[0053] In this embodiment, in order to reduce the adjustment order of the inductance in the parallel structure, it can be achieved by increasing the number of fine-tuning inductors.

[0054] Among them, reference Figure 4 In the parallel structure 20, when there is a fine-tuning inductor 300, the basic inductor 200 and the fine-tuning inductor 300 are connected in parallel, that is, the first end of the basic inductor 200 is directly connected to the first end of the fine-tuning inductor 300 through a connecting strip, and the second end of the basic inductor 200 is connected to the second end of the fine-tuning inductor 300 through a pad 101 and a branch extending from the pad 101. The branch extending from the pad 101 and connected to the inductor is also called an adjustable line segment 400.

[0055] In the parallel structure, reference Figure 5 In the parallel structure 21, when there are two fine-tuning inductors 300, the basic inductor 200 and the first fine-tuning inductor 301 are connected in parallel, that is, the first end of the basic inductor 200 is directly connected to the first end of the first fine-tuning inductor 301 through a connecting strip, the second end of the basic inductor 200 is directly connected to the second end of the first fine-tuning inductor 301 through an adjustable line segment 400 (the adjustable line segment 400 is a line segment formed by connecting the pad 101 and the inductor, which is essentially a line segment-shaped area on the pad that is connected to the inductor when the inductor is soldered on the pad), the first end of the second fine-tuning inductor 302 is directly connected to the first end of the first fine-tuning inductor 301 through a connecting strip, and the second end of the second fine-tuning inductor 302 is connected to the second end of the first fine-tuning inductor 301 through an adjustable line segment 400.

[0056] Furthermore, in the parallel structure, when there are more than two fine-tuning inductors 300, the parallel connection method of the basic inductor 200 and the fine-tuning inductor 300 is similar to the parallel connection method of the basic inductor 200 and the fine-tuning inductor 300 when there are two fine-tuning inductors 300, and will not be repeated here.

[0057] Optionally, as a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, the preset connection structure includes a hybrid structure.

[0058] The hybrid structure includes at least two fine-tuning inductors, each of which is connected to the other in an extended-range manner, and the fine-tuning inductor in the hybrid structure is connected in parallel with the basic inductor.

[0059] Alternatively, the fine-tuning inductors in the hybrid structure are connected in parallel, and the fine-tuning inductors in the hybrid structure are connected to the basic inductor for extended range.

[0060] In this embodiment, the inductance value can be adjusted by changing the range-increasing / parallel relationship between the basic inductance and a plurality of fine-tuning inductors.

[0061] Optionally, refer to Figure 1 As a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, the adjustable integrated three-dimensional inductor may also include an adjustable line segment 400, which is a line segment formed by connecting the pad 101 on the circuit board 100 with the inductor on the circuit board. The fine-tuning inductor 300 may also be connected to the basic inductor 200 through the adjustable line segment 400 and the pad 101.

[0062] In this embodiment, the pad 101 on the circuit board extends two branches to be connected to the fine-tuning inductor 300 , and the line segment connecting the pad 101 and the fine-tuning inductor 300 is the adjustable line segment 400 .

[0063] In this embodiment, if the adjustable integrated three-dimensional inductor includes only one fine-tuning inductor 300, the first end of the fine-tuning inductor 300 is directly connected to the first end of the basic inductor 200 through the connecting strip, the second end of the fine-tuning inductor 300 is connected to the soldering pad 101 on the circuit board 100, and the second end of the basic inductor 200 is also connected to the soldering pad 101 on the circuit board 100, that is, the second end of the fine-tuning inductor 300 is connected to the second end of the basic inductor 200 through the soldering pad 101 and the adjustable line segment 400.

[0064] In this embodiment, if the adjustable integrated three-dimensional inductor includes two or more fine-tuning inductors 300, the fine-tuning inductors 300 are connected to the basic inductor 200 through the adjustable line segment 400 in two connection modes:

[0065] First, the first ends of all the fine-tuning inductors 300 in the adjustable integrated stereo inductor are connected to the first end of the basic inductor 200 through the connecting strip, and the second ends of all the fine-tuning inductors 300 in the adjustable integrated stereo inductor are connected to the pad 101 on the circuit board 100, and the second ends of each fine-tuning inductor 300 are interconnected. For example, if three fine-tuning inductors 300 and one basic inductor 200 are provided in a certain adjustable integrated stereo inductor, the first ends of the three fine-tuning inductors 300 are connected to the first end of the basic inductor 200, and the second ends of the three fine-tuning inductors 300 are respectively connected to the 101a end, the 101b end, and the 101c end of the pad 101 on the circuit board 100, wherein the 101a end, the 101b end, and the 101c end of the pad 101 are interconnected.

[0066] Second, the first ends of all the fine-tuning inductors 300 in the adjustable integrated stereo inductor are connected to the first end of the basic inductor 200, and the second end of each fine-tuning inductor 300 in the adjustable integrated stereo inductor is connected to the pad 101 on the circuit board 100, and the second ends of each fine-tuning inductor 300 are not interconnected. For example, if three fine-tuning inductors 300 and one basic inductor 200 are provided in a certain adjustable integrated stereo inductor, the first ends of the three fine-tuning inductors 300 are connected to the first end of the basic inductor 200 through a connecting strip, and the second ends of the three fine-tuning inductors 300 are respectively connected to the 101a end, the 101b end, and the 101c end of the pad 101 on the circuit board 100, wherein the 101a end, the 101b end, and the 101c end of the pad 101 are not interconnected.

[0067] Optionally, as a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, the basic inductor is provided with a first lead-out terminal and a second lead-out terminal (i.e., the first end and the second end of the basic inductor), and the fine-tuning inductor is provided with a third lead-out terminal and a fourth lead-out terminal (i.e., the first end and the second end of the fine-tuning inductor).

[0068] The third lead-out terminal of the fine-tuning inductor is directly connected to the first lead-out terminal of the basic inductor (the direct connection of the two inductors described in the embodiment of the present invention means that the two inductors are directly connected through a connecting bar).

[0069] The second lead-out terminal of the basic inductor is connected to the pad 101 on the circuit board.

[0070] The fourth lead-out terminal of the fine-tuning inductor is connected to the soldering pad 101 on the circuit board.

[0071] The line segment between the second lead-out terminal of the basic inductor and the pad 101 and the line segment between the fourth lead-out terminal of the fine-tuning inductor and the pad 101 are both adjustable line segments 400 .

[0072] In this embodiment, the lead-out terminals can be located at the two poles of the inductor, or at any position on the inductor that can be connected to other circuit elements. Interrupting the adjustable line segment 400 can increase the inductance value of the three-dimensional inductor, so the basic inductance can be adjusted by interrupting the adjustable line segment 400.

[0073] Optionally, as a specific implementation of the adjustable integrated three-dimensional inductor provided in an embodiment of the present invention, the adjustable integrated three-dimensional inductor may further include a plurality of basic inductors and at least one fine-tuning inductor.

[0074] In this embodiment, the number and setting positions of the fine-tuning inductors can be flexibly selected according to the setting positions of the basic inductors in the adjustable integrated three-dimensional inductor.

[0075] A second aspect of the embodiments of the present invention provides an LC filter, comprising any one of the above-mentioned adjustable integrated three-dimensional inductors.

[0076] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An adjustable integrated three-dimensional inductor, It is characterized in that The adjustable integrated three-dimensional inductor is integrated on a circuit board, and includes: a basic inductor and a fine-tuning inductor integrated on the circuit board; The fine-tuning inductor is connected to the basic inductor by a preset connection structure; The preset connection structure includes one of an extended-range structure, a parallel structure and a hybrid structure; wherein the extended-range structure means that the basic inductor and the fine-tuning inductor are connected in an extended-range manner; the parallel structure means that the basic inductor and the fine-tuning inductor are connected in a parallel manner; and the hybrid structure means that the basic inductor and the fine-tuning inductor are connected in a parallel manner, both in an extended-range manner and in a parallel manner. The adjustable integrated three-dimensional inductor also includes an adjustable line segment, which is a line segment formed by connecting the pad on the circuit board and the inductor on the circuit board; the fine-tuning inductor is connected to the basic inductor through the pad and the adjustable line segment; The basic inductor is provided with a first lead-out terminal and a second lead-out terminal, and the fine-tuning inductor is provided with a third lead-out terminal and a fourth lead-out terminal; The third lead-out terminal of the fine-tuning inductor is directly connected to the first lead-out terminal of the basic inductor; The second lead-out terminal of the basic inductor is connected to the pad on the circuit board; The fourth lead-out terminal of the fine-tuning inductor is connected to the pad on the circuit board; Wherein, the line segment between the second lead-out terminal of the basic inductor and the pad, and the line segment between the fourth lead-out terminal of the fine-tuning inductor and the pad are both adjustable line segments.

2. The adjustable integrated three-dimensional inductor as claimed in claim 1, It is characterized in that The preset connection structure is a range-extending structure; In the range-extending structure, at least one fine-tuning inductor is included, and the fine-tuning inductor in the range-extending structure is connected to the basic inductor for range extension.

3. The adjustable integrated three-dimensional inductor as claimed in claim 2, It is characterized in that When the number of the fine-tuning inductors in the range-extending structure is more than one, the fine-tuning inductors in the range-extending structure are connected to each other in an extended-range manner.

4. The adjustable integrated three-dimensional inductor as claimed in claim 1, It is characterized in that The preset connection structure is a parallel structure; In the parallel structure, at least one fine-tuning inductor is included, and the fine-tuning inductor in the parallel structure is connected in parallel with the basic inductor.

5. The adjustable integrated three-dimensional inductor as claimed in claim 4, It is characterized in that When the number of the fine-tuning inductors in the parallel structure is more than one, the fine-tuning inductors in the parallel structure are connected in parallel.

6. The adjustable integrated three-dimensional inductor as claimed in claim 1, It is characterized in that The preset connection structure is a hybrid structure; The hybrid structure includes at least two fine-tuning inductors, each of which is connected to the other in an extended-range manner, and the fine-tuning inductor in the hybrid structure is connected in parallel with the basic inductor.

7. The adjustable integrated three-dimensional inductor as claimed in claim 1, It is characterized in that The preset connection structure is a hybrid structure; The hybrid structure includes at least two fine-tuning inductors, each of which is connected in parallel, and the fine-tuning inductors in the hybrid structure are connected to the basic inductor in an extended-range manner.

8. An LC filter, It is characterized in that The invention comprises the adjustable integrated three-dimensional inductor as described in any one of claims 1 to 7.

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