CN112466631B - Inductive device - Google Patents

Abstract

An inductor device comprises a first splayed inductor and a second splayed inductor. The second splayed inductor and the first splayed inductor are arranged side by side and are coupled with each other in a staggered manner.

Description

Inductive device

technical field

This case is about an electronic device, and especially an inductive device.

Background technique

As electronic devices become lighter, thinner and shorter, and integrated circuits are used at higher and higher frequencies, such as millimeter waves, the size of inductors is also gradually reduced. At such a small size, the coupling phenomenon becomes more severe and affects the quality factor (Q) of the integrated inductor.

SUMMARY OF THE INVENTION

SUMMARY The purpose of this summary is to provide a simplified summary of the disclosure to give the reader a basic understanding of the disclosure. This summary is not an exhaustive overview of the disclosure, and it is not intended to identify key/critical elements of the present embodiments or to delimit the scope of the present disclosure.

One purpose of the content of this case is to provide an inductive device, thereby solving the problems existing in the prior art, and the means for solving the problem are as described later.

In order to achieve the above-mentioned purpose, a technical aspect of the content of the present application relates to an inductor device, which includes a first figure-eight inductor and a second figure-eight inductor. The second figure-eight inductors are arranged side by side with the first figure-eight inductors, and are alternately coupled to the first figure-eight inductors.

Therefore, according to the technical content of this case, the inductance device shown in the embodiment of this case can effectively reduce the influence of the coupling phenomenon in various directions (X, Y directions) on the quality factor of the inductance device.

After referring to the following embodiments, a person with ordinary knowledge in the technical field to which this case belongs can easily understand the basic spirit and other inventive purposes of this case, as well as the technical means and implementation forms adopted in this case.

Description of drawings

In order to make the above-mentioned and other purposes, features, advantages and embodiments of this case more obvious and easy to understand, the descriptions of the accompanying drawings are as follows:

FIG. 1 is a schematic diagram illustrating an inductor device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating an inductor device according to an embodiment of the present invention.

FIG. 3 is a schematic diagram illustrating experimental data of an inductive device according to an embodiment of the present application.

FIG. 4 is a schematic diagram illustrating experimental data of an inductive device according to an embodiment of the present invention.

In accordance with common practice, the various features and elements in the figures are not drawn to scale, but are drawn in a manner that best represents the specific features and elements relevant to the present case. Furthermore, the same or similar reference numerals are used to refer to similar elements/components among the different drawings.

Symbol Description

1000, 1000A: Inductive device

1100, 1100A: The first figure-eight inductor

1110, 1110A: first winding

1120, 1120A: Second winding

1130, 1130A: 1st center tap

1140, 1140A: the first input terminal

1200, 1200A: The second figure-eight inductor

1210, 1210A: Tertiary winding

1220, 1220A: Fourth winding

1230, 1230A: Second center tap

1240, 1240A: the second input

Detailed ways

In order to make the description of the present disclosure more detailed and complete, the following provides an illustrative description for the implementation aspects and specific embodiments of the present case; but this is not the only form of implementing or using the specific embodiments of the present case. The features of various specific embodiments as well as method steps and sequences for constructing and operating these specific embodiments are encompassed in the detailed description. However, other embodiments may also be utilized to achieve the same or equivalent function and sequence of steps.

Unless otherwise defined in this specification, the scientific and technical terms used herein have the same meanings as understood and commonly used by those of ordinary skill in the technical field to which this case belongs. In addition, unless contradicting the context, the singular noun used in this specification covers the plural form of the noun; and the plural noun used also covers the singular form of the noun.

FIG. 1 is a schematic diagram illustrating an inductive device 1000 according to an embodiment of the present invention. As shown in FIG. 1 , the inductor device 1000 includes a first figure-eight inductor 1100 and a second figure-eight inductor 1200 . The first figure-8 inductors 1100 and the second figure-8 inductors 1200 are arranged side by side, and the first figure-8 inductors 1100 and the second figure-8 inductors 1200 are alternately coupled.

In one embodiment, the first figure-eight inductor 1100 includes a first winding 1110 and a second winding 1120 , and the second figure-eight inductor 1200 includes a third winding 1210 and a fourth winding 1220 . Structurally, the first winding 1110 and the third winding 1210 are alternately coupled on the first side (eg, the upper side/upper half) of the inductor device 1000 , and the second winding 1120 and the fourth winding 1220 are on the second side of the inductor device 1000 . (lower side/lower half) staggered coupling. In another embodiment, the first side (eg, the upper side/top half) of the inductive device 1000 is opposite to the second side (eg, the lower side/lower half) of the inductive device 1000 .

In other embodiments, the first winding 1110 and the second winding 1120 of the first figure-eight inductor 1100 are alternately coupled, and the third winding 1210 and the fourth winding 1220 of the second figure-eight inductor 1200 are alternately coupled.

In one embodiment, the first figure-eight inductor 1100 further includes a first center tap 1130 , and the second figure-eight inductor 1200 further includes a second center tap 1230 . The first center tap 1130 of the first figure-eight inductor 1100 and the second center tap 1230 of the second figure-eight inductor 1200 are disposed on the first side (eg, the upper side). In another embodiment, the first center tap 1130 of the first figure-eight inductor 1100 is coupled to the inner side of the first winding 1110 , and the second center tap 1230 of the second figure-eight inductor 1200 is coupled to the third winding 1210 inside of . However, the present application is not limited to this embodiment, the structures of the first figure-eight inductor 1100 and the second figure-eight inductor 1200 can be configured according to actual requirements, and the center tap can be adjusted accordingly according to the above configuration.

In yet another embodiment, the first figure-eight inductor 1100 further includes a first input terminal 1140 , and the second figure-eight type inductor 1200 further includes a second input terminal 1240 . The first input terminal 1140 of the first figure-eight inductor 1100 and the second input terminal 1240 of the second figure-eight inductor 1200 are disposed on the second side (the following side). In other embodiments, the first input terminal 1140 of the first figure-eight inductor 1100 is disposed inside the second winding 1120 , and the second input terminal 1240 of the second figure-eight inductor 1200 is disposed inside the fourth winding 1220 . However, the present application is not limited to this embodiment, the first input terminal 1140 can be disposed on the left side of the second winding 1120, and the second input terminal 1240 can be disposed on the right side of the fourth winding 1220, depending on actual requirements. In addition, the structures of the first figure-eight inductor 1100 and the second figure-eight inductor 1200 can be configured according to actual needs, and the input terminals can be adjusted accordingly according to the above configuration.

In one embodiment, the first winding 1110 and the second winding 1120 of the first figure-eight inductor 1100 are respectively wound into a plurality of coils. The coils of the first winding 1110 and the coils of the second winding 1120 are alternately coupled at about the middle of the first figure-eight inductor 1100 . For example, the first winding 1110 and the second winding 1120 are both wound in three turns, and the three turns of the coils are alternately coupled to each other. In another embodiment, the third winding 1210 and the fourth winding 1220 of the second figure-eight inductor 1200 are respectively wound into a plurality of coils. The coils of the third winding 1210 and the coils of the fourth winding 1220 are alternately coupled at about the middle of the second figure-eight inductor 1200 . For example, the third winding 1210 and the fourth winding 1220 are both wound in three turns, and the three turns of the coils are alternately coupled to each other.

In another embodiment, part of the first windings 1110 of the first figure-eight inductor 1100 and part of the third windings 1210 of the second figure-eight inductor 1200 are alternately coupled. For example, the first winding 1110 and the third winding 1210 are both wound in three turns, but only two turns of the windings are alternately coupled to each other. In other embodiments, part of the second winding 1120 of the first figure-8 inductor 1100 and part of the fourth winding 1220 of the second figure-8 inductor 1200 are alternately coupled. For example, the second winding 1120 and the fourth winding 1220 are both wound with three turns, but only two turns of the windings are coupled to each other in a staggered manner.

In one embodiment, when the current enters the first figure-8 inductor 1100 and the second figure-8 inductor 1200 from the input end, the first and second windings 1110 , 1120 and the first windings 1110 , 1120 of the first figure-8 inductor 1100 and the The third and fourth windings 1210 and 1220 of the two-eight-shaped inductor 1200 flow in the direction of the current. The current direction of the current will be described later. The current directions of the two currents on the same side are opposite. For example, the current directions of the currents of the first winding 1110 and the second winding 1120 also located on the left side are opposite. The currents of the third winding 1210 and the fourth winding 1220, also located on the right, have opposite current directions. The current directions of the first winding 1110 and the third winding 1210 also located on the upper side are opposite to each other. The current directions of the currents of the second winding 1120 and the fourth winding 1220, which are also located on the lower side, are opposite.

For example, the current direction of the current on the first winding 1110 is counterclockwise, the current direction of the current on the second winding 1120 is clockwise, the current direction of the current on the third winding 1210 is clockwise, and the current direction of the current on the second winding 1120 is clockwise. The current direction of the current on the four windings 1220 is counterclockwise, therefore, the current directions of the first winding 1110 and the second winding 1120 are opposite, and the current directions of the third winding 1210 and the fourth winding 1220 are opposite. In addition, from another perspective, the currents of the first winding 1110 and the third winding 1210 have opposite current directions, and the second winding 1120 and the fourth winding 1220 have opposite currents.

As described above, since the inductance device 1000 shown in FIG. 1 adopts the design of double figure-eight inductors, and the two figure-eight inductors are arranged side by side, the influence of coupling phenomena from various directions on the quality factor of the inductance device 1000 can be effectively reduced, In addition, the position of the input end and the central tap in the inductance device 1000 can be flexibly set, so as to facilitate the design and production of the inductance device.

FIG. 2 is a schematic diagram illustrating an inductive device 1000A according to an embodiment of the present invention. Compared with the inductance device 1000 shown in FIG. 1 , the first center tap 1130A and the first input end 1140A of the first figure-eight inductor 1100A of the inductance device 1000A herein are disposed on the same side. The second center tap 1230A of the inductor 1200A is disposed on the same side as the second input terminal 1240A. In other words, the first center tap 1130A and the first input terminal 1140A of the first figure-eight inductor 1100A, and the second center tap 1230A and the second input terminal 1240A of the second figure-eight inductor 1200A are disposed on the same side. In addition, the difference between the inductor device 1000A and the inductor device 1000 of FIG. 1 is that the first input terminal 1140A of the first figure-eight inductor 1100A is disposed outside the second winding 1120A, and the second input terminal of the second figure-eight inductor 1200A 1240A is disposed outside the fourth winding 1220A. In addition, the first center tap 1130A of the first figure-eight inductor 1100A is disposed outside the second winding 1120A, and the second center tap 1230A of the second figure-eight inductor 1200A is disposed outside the fourth winding 1220A. As shown above, since the inductance device 1000A shown in FIG. 2 adopts the design of double figure-eight inductors, and the two figure-eight inductors are arranged side by side, the influence of coupling phenomena from various directions on the quality factor of the inductance device 1000A can be effectively reduced.

FIG. 3 is a schematic diagram illustrating experimental data of an inductor device 1000 shown in FIG. 1 according to an embodiment of the present application. As shown in Figure 3, using the architecture configuration of this case, the experimental curve of the quality factor is C1, and the experimental curve of the inductance value is L1. It can be seen from FIG. 3 that the inductor device 1000 using the structure of the present invention has a better quality factor (Q). For example, the optimum quality factor of the inductance device 1000 is about 9. In addition, at a frequency of 5 GHz, the quality factor of the curve C1 is about 7, and the inductance value of the curve L1 is about 0.9 nH.

FIG. 4 is a schematic diagram illustrating experimental data of an inductive device 1000A shown in FIG. 2 according to an embodiment of the present application. As shown in Figure 4, using the architecture configuration of this case, the experimental curve of the quality factor is C2, and the experimental curve of the inductance value is L2. It can be seen from FIG. 4 that the inductance device 1000A using the structure of the present invention has a better quality factor (Q). For example, the best quality factor of the inductance device 1000 is close to 10. In addition, at a frequency of 5 GHz, the quality factor of the curve C2 is about 7, and the inductance value of the curve L2 is about 0.9nH.

It can be seen from the above embodiments of the present case that the application of the present case has the following advantages. The inductance device shown in the embodiment of this case can effectively reduce the influence of the coupling phenomenon in various directions (X, Y directions) on the quality factor of the inductance device, and can flexibly set the position of the input end and the center tap in the inductance device, Facilitate the design and production of inductive devices.

Although the above embodiments disclose specific examples of this case, they are not intended to limit this case. Those with ordinary knowledge in the technical field to which this case belongs can, without departing from the principles and spirit of this case, carry out Various changes and modifications, therefore, the scope of protection in this case should be defined by the scope of the patent application attached hereto.

Claims (8)

1. An inductive device, comprising:

a first inductance shaped like Chinese character 'ba'; and

a second inductance shaped like Chinese character 'ba' arranged in parallel with the first inductance shaped like Chinese character 'ba', and cross-coupled with the first inductance shaped like Chinese character 'ba',

wherein the first inductance comprises a first winding and a second winding, the second inductance comprises a third winding and a fourth winding, wherein the first winding and the third winding are coupled at a first side of the inductance device in a staggered manner, the second winding and the fourth winding are coupled at a second side of the inductance device in a staggered manner, the first side is opposite to the second side,

wherein the first winding and the second winding of the first inductance in a shape like Chinese character 'ba' are cross-coupled, the third winding and the fourth winding of the second inductance in a shape like Chinese character 'ba', wherein the first inductance in a shape like Chinese character 'ba' further comprises a first center tap, the second inductance in a shape like Chinese character 'ba' further comprises a second center tap, wherein the first center tap of the first inductance in a shape like Chinese character 'ba' and the second center tap of the second inductance in a shape like Chinese character 'ba' are disposed at the first side,

the first splayed inductor further comprises a first input end, the second splayed inductor further comprises a second input end, and the first input end of the first splayed inductor and the second input end of the second splayed inductor are arranged on the second side.

2. The inductive device of claim 1, wherein the first center tap of the first inductor is coupled to an inner side of the first winding, and the second center tap of the second inductor is coupled to an inner side of the third winding; or the first center tap of the first splayed inductor is coupled to the outer side of the second winding, and the second center tap of the second splayed inductor is coupled to the outer side of the fourth winding.

3. The inductor apparatus according to claim 1, wherein the first input terminal of the first inductor is disposed inside the second winding, and the second input terminal of the second inductor is disposed inside the fourth winding; or the first input end of the first splayed inductor is arranged at the outer side of the second winding, and the second input end of the second splayed inductor is arranged at the outer side of the fourth winding.

4. The inductor apparatus according to claim 3, wherein the first input terminal and the first center tap of the first inductance splay, and the second input terminal and the second center tap of the second inductance splay are disposed on the same side.

5. The inductive device of claim 3, wherein the first winding and the second winding of the first inductor are each wound into a plurality of coils, wherein the coils of the first winding are cross-coupled with the coils of the second winding, wherein the third winding and the fourth winding of the second inductor are each wound into a plurality of coils, wherein the coils of the third winding are cross-coupled with the coils of the fourth winding.

6. The inductive device of claim 5, wherein a portion of the first winding of the first inductance and a portion of the third winding of the second inductance are cross-coupled, and wherein a portion of the second winding of the first inductance and a portion of the fourth winding of the second inductance are cross-coupled.

7. The inductive device of claim 6, wherein the current directions of the currents in the first winding, the second winding, the third winding and the fourth winding are opposite.

8. The inductive device of claim 7, wherein the first winding and the second winding have currents in opposite directions and the third winding and the fourth winding have currents in opposite directions, wherein the first winding and the third winding have currents in opposite directions and the second winding and the fourth winding have currents in opposite directions.

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