CN112466631A

CN112466631A - Inductance device

Info

Publication number: CN112466631A
Application number: CN201910865925.5A
Authority: CN
Inventors: 颜孝璁; 陈家源
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2021-03-09
Anticipated expiration: 2039-09-09
Also published as: CN112466631B

Abstract

An inductor device includes a first figure-eight inductor and a second figure-eight inductor. The second figure-eight inductor is arranged side by side with the first figure-eight inductor and is cross-coupled with the first figure-eight inductor.

Description

Inductance device

Technical Field

The present disclosure relates to an electronic device, and more particularly, to an inductive device.

Background

In the case of thinner, thinner and smaller electronic devices, the size of the inductor is also gradually reduced under the condition that the application frequency of the integrated circuit is higher and higher, such as millimeter wave (millimeter wave). At such small dimensions, the coupling phenomenon becomes more severe, which affects the quality factor (Q) of the integrated inductor.

Disclosure of Invention

This summary is provided to provide a simplified summary of the disclosure in order to provide a basic understanding to the reader. This summary is not an extensive overview of the disclosure and is intended to neither identify key/critical elements of the embodiments nor delineate the scope of the embodiments.

An object of the present invention is to provide an inductor device, which solves the problems of the prior art, and the solving means is as follows.

To achieve the above objective, one aspect of the present disclosure relates to an inductor device, which includes a first inductance shaped like a Chinese character 'ba' and a second inductance shaped like a Chinese character 'ba'. The second splayed inductor and the first splayed inductor are arranged side by side and are coupled with each other in a staggered manner.

Therefore, according to the technical content of the present application, the inductive device according to the embodiment of the present application can effectively reduce the influence of the coupling phenomenon in each direction (X, Y direction) on the quality factor of the inductive device.

The basic spirit and other objects of the present invention, as well as the technical means and embodiments adopted by the present invention, will be readily understood by those skilled in the art after considering the following embodiments.

Drawings

In order to make the aforementioned and other objects, features, advantages and embodiments of the present invention comprehensible, the following description is made with reference to the accompanying drawings:

fig. 1 is a schematic diagram illustrating an inductive device according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram illustrating an inductive device according to an embodiment of the disclosure.

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

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

In accordance with conventional practice, the various features and elements of the drawings are not drawn to scale in order to best illustrate the specific features and elements associated with the present disclosure. Moreover, the same or similar reference numbers are used throughout the different drawings to refer to similar elements/components.

Description of the symbols

1000. 1000A: inductance device

1100. 1100A: first inductor shaped like Chinese character' ba

1110. 1110A: first winding

1120. 1120A: second winding

1130. 1130A: first center tap

1140. 1140A: a first input terminal

1200. 1200A: second eight-shaped inductor

1210. 1210A: third winding

1220. 1220A: the fourth winding

1230. 1230A: second center tap

1240. 1240A: second input terminal

Detailed Description

In order to make the disclosure more thorough and complete, illustrative descriptions are provided below for embodiments and specific examples of the disclosure; it is not intended to be exhaustive or to limit the invention to the precise form disclosed. The embodiments are intended to cover the features of the various embodiments as well as the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and step sequences.

Unless defined otherwise herein, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Furthermore, as used herein, the singular tense of a noun, unless otherwise conflicting with context, encompasses the plural form of that noun; the use of plural nouns also covers the singular form of such nouns.

Fig. 1 is a schematic diagram illustrating an inductive device 1000 according to an embodiment of the present disclosure. As shown, the inductor device 1000 includes a first splayed inductor 1100 and a second splayed inductor 1200. The first splayed inductor 1100 and the second splayed inductor 1200 are arranged side by side, and the first splayed inductor 1100 and the second splayed inductor 1200 are coupled in a staggered manner.

In one embodiment, the first inductor 1100 includes a first winding 1110 and a second winding 1120, and the second inductor 1200 includes a third winding 1210 and a fourth winding 1220. Structurally, the first winding 1110 and the third winding 1210 are alternatively coupled to a first side (e.g., upper side/upper half) of the inductive device 1000, and the second winding 1120 and the fourth winding 1220 are alternatively coupled to a second side (e.g., lower side/lower half) of the inductive device 1000. In another embodiment, a first side (e.g., upper side/half) of the inductive device 1000 is opposite a second side (e.g., lower side/half) of the inductive device 1000.

In other embodiments, the first winding 1110 and the second winding 1120 of the first splayed inductor 1100 are alternatively coupled, and the third winding 1210 and the fourth winding 1220 of the second splayed inductor 1200 are alternatively coupled.

In one embodiment, the first splayed inductor 1100 further comprises a first center tap 1130, and the second splayed inductor 1200 further comprises a second center tap 1230. The first center tap 1130 of the first splayed inductor 1100 and the second center tap 1230 of the second splayed inductor 1200 are disposed on a first side (e.g., upper side). In another embodiment, the first center tap 1130 of the first splayed inductor 1100 is coupled to the inner side of the first winding 1110, and the second center tap 1230 of the second splayed inductor 1200 is coupled to the inner side of the third winding 1210. However, the present disclosure is not limited to this embodiment, the first and second splayed

inductors

1100 and 1200 may be configured according to actual requirements, and the center tap may be adjusted accordingly according to the above configuration.

In another embodiment, the first inductor 1100 further comprises a first input 1140, and the second inductor 1200 further comprises a second input 1240. The first input end 1140 of the first splayed inductor 1100 and the second input end 1240 of the second splayed inductor 1200 are disposed on a second side (e.g., lower side). In other embodiments, the first input 1140 of the first splayed inductor 1100 is disposed inside the second winding 1120, and the second input 1240 of the second splayed inductor 1200 is disposed inside the fourth winding 1220. However, the present disclosure is not limited to this embodiment, the first input terminal 1140 may be disposed at the left side of the second winding 1120, and the second input terminal 1240 may be disposed at the right side of the fourth winding 1220, depending on the actual requirement. In addition, the first inductor 1100 and the second inductor 1200 can be configured according to actual requirements, and the input end can be adjusted accordingly according to the configuration.

In one embodiment, the first winding 1110 and the second winding 1120 of the first inductor 1100 are 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 splayed inductor 1100. For example, the first winding 1110 and the second winding 1120 are wound in three turns, and the three turns are cross-coupled to each other. In another embodiment, the third winding 1210 and the fourth winding 1220 of the second splay inductor 1200 are respectively wound to form 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 v-shaped inductor 1200. For example, the third winding 1210 and the fourth winding 1220 are wound into three turns, and the three turns of coils are cross-coupled to each other.

In another embodiment, a portion of the first winding 1110 of the first wye inductor 1100 is cross-coupled to a portion of the third winding 1210 of the second wye inductor 1200. For example, the first winding 1110 and the third winding 1210 are wound by three turns, but only two of the turns are coupled to each other in a staggered manner. In other embodiments, a portion of the second winding 1120 of the first wye inductor 1100 is cross-coupled to a portion of the fourth winding 1220 of the second wye inductor 1200. For example, the second winding 1120 and the fourth winding 1220 are wound by three turns, but only two of the turns are cross-coupled.

In an embodiment, when a current enters the first and

second inductors

1100 and 1200 from the input end, the current flows through the first and

second windings

1110 and 1120 of the first inductor 1100 and the third and

fourth windings

1210 and 1220 of the second inductor 1200, and the current direction of the current is as described below, and the current direction of the current of the two windings on the same side of the first winding 1110, the second winding 1120, the third winding 1210 and the fourth winding 1220 is opposite. For example, the first winding 1110 and the second winding 1120, which are also located on the left side, have current directions opposite to each other. The third winding 1210, which is also on the right, has a current flow direction opposite to that of the fourth winding 1220. The first winding 1110 and the third winding 1210, which are also located on the upper side, have opposite current directions. The second winding 1120, which is also on the lower side, has a current flow direction opposite to that of the fourth winding 1220.

For example, the current flowing through the first winding 1110 is in a counterclockwise direction, the current flowing through the second winding 1120 is in a clockwise direction, the current flowing through the third winding 1210 is in a clockwise direction, and the current flowing through the fourth winding 1220 is in a counterclockwise direction, so that the current flowing through the first winding 1110 and the second winding 1120 are in opposite directions, and the current flowing through the third winding 1210 and the fourth winding 1220 are in opposite directions. In addition, from another perspective, 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 current directions.

As described above, since the inductance device 1000 shown in fig. 1 adopts the double-splayed inductor design, and the two splayed inductors are arranged side by side, the influence of the coupling phenomenon from each direction on the quality factor of the inductance device 1000 can be effectively reduced, and the positions of the input end and the center tap in the inductance device 1000 can be flexibly arranged, thereby facilitating 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 disclosure. Compared to the inductive device 1000 shown in fig. 1, the first center tap 1130A and the first input terminal 1140A of the first inductance type 1100A of the inductive device 1000A are disposed on the same side, and the second center tap 1230A and the second input terminal 1240A of the second inductance type 1200A are disposed on the same side. In other words, the first center tap 1130A and the first input end 1140A of the first splayed inductor 1100A, and the second center tap 1230A and the second input end 1240A of the second splayed inductor 1200A are disposed on the same side. The difference between the inductor apparatus 1000A and the inductor apparatus 1000 in fig. 1 is that the first input end 1140A of the first inductor 1100A is disposed outside the second winding 1120A, and the second input end 1240A of the second inductor 1210A is disposed outside the fourth winding 1220A. In addition, the first center tap 1130A of the first inductance eight 1100A is disposed outside the second winding 1120A, and the second center tap 1230A of the second inductance eight 1210A is disposed outside the fourth winding 1220A. As described above, since the inductance device 1000A shown in fig. 2 is designed as a double-splayed inductance, and two splayed inductances 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 the inductive device 1000 shown in fig. 1 according to an embodiment of the present disclosure. As shown in the figure, with the configuration of the present disclosure, the experimental curve of the quality factor is C1, and the experimental curve of the inductance value is L1. As can be seen, the inductance device 1000 using the present invention has a better quality factor (Q). For example, the best quality factor of the inductor 1000 is about 9, and at a frequency of 5GHz, the quality factor of the curve C1 comparison is about 7, and the inductance value of the curve L1 comparison 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 disclosure. As shown in the figure, with the configuration of the present disclosure, the experimental curve of the quality factor is C2, and the experimental curve of the inductance value is L2. As can be seen, the inductive device 1000A using the present invention has a better quality factor (Q). For example, the best quality factor of the inductor 1000 is close to 10, and at a frequency of 5GHz, the quality factor of the curve C2 comparison is about 7, and the inductance value of the curve L2 comparison is about 0.9 nH.

According to the embodiments of the present invention, the following advantages can be obtained. The inductance device disclosed by the embodiment of the invention can effectively reduce the influence of the coupling phenomenon in each direction (X and Y directions) on the quality factor of the inductance device, and can flexibly set the positions of the input end and the center tap in the inductance device, thereby facilitating the design and production of the inductance device.

Although specific embodiments of the present disclosure have been described above, it should be understood that they have the ordinary skill in the art and various changes and modifications can be made therein without departing from the spirit and scope of the present disclosure, and therefore the scope of the present disclosure should be determined by the appended claims.

Claims

1. An inductive device comprising:

a first figure-eight inductor; and

A second figure-eight inductor is arranged side by side with the first figure-eight inductor, and is alternately coupled to the first figure-eight inductor.

2. The inductive device of claim 1, wherein the first figure-eight inductor comprises a first winding and a second winding, the second figure-eight inductor comprises a third winding and a fourth winding, wherein The first winding and the third winding are alternately coupled on a first side of the inductive device, and the second winding and the fourth winding are alternately coupled on a second side of the inductive device, wherein the first sides are opposite on the second side.

3 . The inductor device of claim 2 , wherein the first winding and the second winding of the first figure-eight inductor are alternately coupled, and the third winding and the fourth winding of the second figure-eight inductor are staggered. 4 . The windings are alternately coupled, wherein the first figure-eight inductor further includes a first center tap, the second figure-eight inductor further includes a second center tap, wherein the first center tap of the first figure-eight inductor and the second center tap of the second figure-eight inductor is disposed on the first side.

4. The inductance device of claim 3, wherein the first center tap of the first figure-eight inductor is coupled to the inner side of the first winding, and the second center tap of the second figure-eight inductor coupled to the inner side of the third winding; or the first center tap of the first figure-eight inductor is coupled to the outside of the second winding, and the second center tap of the second figure-eight inductor is coupled on the outside of the fourth winding.

5. The inductance device of claim 3, wherein the first figure-eight inductor further comprises a first input terminal, the second figure-eight inductor further comprises a second input terminal, wherein the first figure-eight type inductor further comprises a first input terminal. The first input end of the inductor and the second input end of the second figure-eight inductor are arranged on the second side, wherein the first input end of the first figure-eight inductor is arranged on the inner side of the second winding , and the second input end of the second figure-eight inductor is disposed inside the fourth winding; or the first input end of the first figure-eight inductor is disposed outside the second winding, and the first The second input end of the two-eight-shaped inductor is disposed outside the fourth winding.

6 . The inductance device of claim 5 , wherein the first input terminal and the first center tap of the first figure-eight inductor, the second input terminal and the second input terminal of the second figure-eight inductor. 7 . The center taps are all set on the same side.

7. The inductance device of claim 5, wherein the first winding and the second winding of the first figure-eight inductor are respectively wound into a plurality of coils, wherein the coils of the first winding and the second winding The coils of the winding are alternately coupled, wherein the third winding and the fourth winding of the second figure-eight inductor are respectively wound into a plurality of coils, wherein the coils of the third winding and the fourth winding are The coils are alternately coupled.

8 . The inductive device of claim 7 , wherein part of the first winding of the first figure-eight inductor and part of the third winding of the second figure-eight inductor are alternately coupled, wherein the first figure-eight inductor A part of the second winding of the type inductor is alternately coupled to a part of the fourth winding of the second figure-eight type inductor.

9 . The inductive device of claim 8 , wherein currents of the first winding, the second winding, the third winding and the fourth winding on the same side have opposite current directions. 10 .

10 . The inductive device of claim 9 , wherein the currents of the first winding and the second winding have opposite current directions, and the third winding and the fourth winding have opposite currents, wherein the first winding has opposite directions. 11 . The current direction of the current in the second winding is opposite to that of the current in the fourth winding.