CN114446623A - Inductor assembly and integrated circuit - Google Patents

Inductor assembly and integrated circuit Download PDF

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Publication number
CN114446623A
CN114446623A CN202210121265.1A CN202210121265A CN114446623A CN 114446623 A CN114446623 A CN 114446623A CN 202210121265 A CN202210121265 A CN 202210121265A CN 114446623 A CN114446623 A CN 114446623A
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Prior art keywords
inductor
terminal
current
assembly
electrically connected
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CN202210121265.1A
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CN114446623B (en
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侯卫兵
雷伟龙
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Beijing Litong Communication Co ltd
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Beijing Litong Communication Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/58—Structural electrical arrangements for semiconductor devices not otherwise provided for, e.g. in combination with batteries
    • H01L23/64—Impedance arrangements
    • H01L23/645—Inductive arrangements

Abstract

The present disclosure provides an inductor assembly and an integrated circuit. The inductor assembly includes: the inductor comprises N inductor groups arranged along a preset direction, wherein each inductor group comprises a first inductor and a second inductor which are arranged along the preset direction and electrically connected in parallel, the first inductor and the second inductor are in the shape of an open ring, and N is a positive integer; in the case of current through the inductor assembly, the current passes through the first inductor in a first direction and the current passes through the second inductor in a second direction, the first and second directions being opposite. The electromagnetic radiation interference of the inductor to other circuits can be effectively eliminated.

Description

Inductor assembly and integrated circuit
Technical Field
The present disclosure relates to the field of integrated circuits, and more particularly, to an inductor assembly and an integrated circuit.
Background
A large number of passive devices are included in an integrated circuit, of which on-chip inductance is a very important one. On-chip inductors are one of the important components of radio frequency CMOS (Complementary Metal Oxide Semiconductor) integrated circuits. In a typical wireless product, the inductive element has a significant effect on the overall radio frequency performance, especially with respect to other circuits that may generate radiation effects. The design and analysis of these inductive components has also been extensively studied. The inductor serves as a core component of the radio frequency circuit, and generally can affect the overall performance of the whole circuit. At present, on-chip inductors with high quality factor are widely used in radio frequency circuit modules such as VCO (Voltage-Controlled Oscillator) and low noise amplifier. As the process nodes of CMOS technology become smaller, the impact of inductive radiation on other circuits becomes more and more critical.
Disclosure of Invention
The inventors have observed that in a radio frequency transceiver, multiple VCOs can interact and affect other circuits.
Accordingly, the present disclosure provides an inductor assembly that can effectively eliminate the influence of inductive radiation on other circuits, thereby improving the upper limit range of the operating frequency of the VCO.
According to a first aspect of embodiments of the present disclosure, there is provided an inductor assembly comprising: the inductor comprises N inductor groups arranged along a preset direction, wherein each inductor group comprises a first inductor and a second inductor which are arranged along the preset direction and electrically connected in parallel, the first inductor and the second inductor are in the shape of an open ring, and N is a positive integer; with current passing through the inductor assembly, current passes through the first inductor in a first direction and current passes through the second inductor in a second direction, the first and second directions being opposite.
In some embodiments, the first direction is one of a counterclockwise direction and a clockwise direction, and the second direction is the other of the counterclockwise direction and the clockwise direction.
In some embodiments, the inductor assembly further comprises: a current input for current into the inductor assembly; a current output for current to flow out of the inductor assembly.
In some embodiments, the first terminal of the first inductor and the second terminal of the second inductor are electrically connected to the current input terminal, respectively, and the second terminal of the first inductor and the first terminal of the second inductor are electrically connected to the current output terminal, respectively, such that the first direction is a counterclockwise direction and the second direction is a clockwise direction.
In some embodiments, the first terminal of the first inductor and the second terminal of the second inductor are electrically connected to the current output terminal, respectively, and the second terminal of the first inductor and the first terminal of the second inductor are electrically connected to the current input terminal, respectively, such that the first direction is clockwise and the second direction is counterclockwise.
In some embodiments, all of the N inductor groups have the same opening direction.
In some embodiments, the inner diameter of the split ring ranges from 10-80 microns.
In some embodiments, the split ring has an outer diameter in the range of 30-100 microns.
In some embodiments, the open end of the split ring is in the range of 5-80 microns.
In some embodiments, in the case of N >1, if a second inductor in an ith inductor group is adjacent to a first inductor in an (i + 1) th inductor group, the direction of current through the second inductor in the ith inductor group is opposite to the direction of current through the first inductor in the (i + 1) th inductor group, where 1 ≦ i < N.
In some embodiments, the N is 2.
According to a second aspect of embodiments of the present disclosure, there is provided an integrated circuit comprising an inductor assembly as described in any of the embodiments above.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings may be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic diagram of an inductor assembly according to one embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an inductor assembly according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an integrated circuit according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of an inductor assembly according to an embodiment of the present disclosure.
As shown in FIG. 1, the inductor assembly includes N inductor groups 1-N arranged in a predetermined direction，N is a positive integer. Each inductor group comprises a first inductor and a second inductor which are arranged along a preset direction and are electrically connected in parallel, and the first inductor and the second inductor are in the shape of an open ring. For example, inductor group 1 includes inductors H11, H12, and inductor group n includes inductors Hn1, Hn 2.
In the case of current through the inductor assembly, the current passes through the first inductor in a first direction and the current passes through the second inductor in a second direction, the first and second directions being opposite.
In some embodiments, the first direction is one of a counterclockwise direction and a clockwise direction and the second direction is the other of the counterclockwise direction and the clockwise direction.
For example, as shown in fig. 1, in the inductor group 1, the direction of current through the inductor H11 is counterclockwise, and the direction of current through the inductor H12 is clockwise.
It should be noted that, for each inductor group, a first direction of current passing through the first inductor is opposite to a second direction of current passing through the second inductor, thereby causing electromagnetic radiation generated by the first inductor and electromagnetic radiation generated by the second inductor to cancel each other, effectively reducing the influence of the inductors on other circuits, and being beneficial to improving the upper limit of the operating frequency of the VCO.
In some embodiments, the open ring shape of each inductor may be circular, elliptical, polygonal, or other shapes that are convenient to implement.
In some embodiments, all of the inductors in the N inductor groups have the same opening direction, as shown in fig. 1.
It should be noted that, by making all the inductors have the same opening direction, the electromagnetic radiation cancellation effect can be effectively improved. In addition, the same opening direction is also advantageous for the implementation of wiring.
In some embodiments, the open ring has an inner diameter in the range of 10-80 microns for the open ring shape assumed by each inductor.
In some embodiments, the open ring has an outer diameter in the range of 30-100 microns for the open ring shape assumed by each inductor.
In some embodiments, the open ring has an opening in the range of 5-80 microns for the open ring shape assumed by each inductor.
Fig. 2 is a schematic structural diagram of an inductor assembly according to another embodiment of the present disclosure. As shown in fig. 2, the inductor assembly includes a current input terminal 21 and a current output terminal 22. The current input 21 is for current to enter the inductor assembly and the current output 22 is for current to exit the inductor assembly.
For simplicity, only one inductor bank is shown in fig. 2.
As shown in fig. 2, a first terminal of the first inductor H11 and a second terminal of the second inductor H12 are electrically connected to the current input terminal 21, respectively, and a second terminal of the first inductor H11 and a first terminal of the second inductor H12 are electrically connected to the current output terminal 22, respectively. Thus, a first direction of current through the first inductor H11 is counter-clockwise and a second direction of current through the second inductor H12 is clockwise.
Fig. 3 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure. Fig. 3 differs from fig. 2 in that the connection relationship between the current input terminal 21 and the current output terminal 22 is changed.
As shown in fig. 3, a first terminal of the first inductor H11 and a second terminal of the second inductor H12 are electrically connected to the current output terminal 22, respectively, and a second terminal of the first inductor H11 and a first terminal of the second inductor H12 are electrically connected to the current input terminal 21, respectively. Thus, a first direction of current through the first inductor H11 is clockwise, and a second direction of current through the second inductor H12 is counter-clockwise.
In some embodiments, in the case of N >1, if the second inductor in the ith inductor group is adjacent to the first inductor in the (i + 1) th inductor group, the direction of current through the second inductor in the ith inductor group is opposite to the direction of current through the first inductor in the (i + 1) th inductor group, where 1 ≦ i < N.
That is, the inductors included in the inductor assembly are arranged in a predetermined direction, and the direction of current passing through any two adjacent inductors is different for the two adjacent inductors. Therefore, the effect of offsetting the electromagnetic radiation can be effectively improved.
In some embodiments, the inductor assembly includes 2 inductor groups arranged along a predetermined direction, i.e., N-2. The inventor finds that the inductor component has the best electromagnetic radiation cancellation effect when N is 2.
Fig. 4 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure.
As shown in fig. 4, the inductor assembly comprises 2 inductor groups 1, 2 arranged in a preset direction. Each inductor group comprises a first inductor and a second inductor which are arranged along a preset direction and are electrically connected in parallel, and the first inductor and the second inductor are in the shape of an open ring. For example, the inductor group 1 includes inductors H11 and H12 arranged in a predetermined direction and electrically connected in parallel, and the inductor group 2 includes inductors H21 and H22 arranged in a predetermined direction and electrically connected in parallel.
A first terminal of the inductor H11 and a second terminal of the inductor H12 are electrically connected to the current input terminal 21, respectively, and a second terminal of the inductor H11 and a first terminal of the inductor H12 are electrically connected to the current output terminal 22, respectively. Thus, the direction of current through inductor H11 is counterclockwise and the direction of current through inductor H12 is clockwise.
Further, a first terminal of the inductor H21 and a second terminal of the inductor H22 are electrically connected to the current input terminal 21, respectively, and a second terminal of the inductor H21 and a first terminal of the inductor H22 are electrically connected to the current output terminal 22, respectively. Thus, the direction of current through inductor H21 is counterclockwise and the direction of current through inductor H12 is clockwise.
It can be seen that for two inductors located in the same inductor group, for example H11 and H12, or H21 and H22, the directions of current flow are opposite. Furthermore, the direction of current flow is also reversed for two adjacent inductors located in different inductor groups, e.g. H12 and H21. Whereby the effect of electromagnetic radiation cancellation can be ensured.
Fig. 5 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure. Fig. 5 differs from fig. 4 in that the connection relationship between the current input terminal 21 and the current output terminal 22 is changed.
As shown in fig. 5, the first terminal of the inductor H11 and the second terminal of the inductor H12 are electrically connected to the current output terminal 22, and the second terminal of the inductor H11 and the first terminal of the inductor H12 are electrically connected to the current input terminal 21, respectively. Thus, the direction of current through inductor H11 is clockwise and the direction of current through inductor H12 is counter-clockwise.
Further, a first terminal of the inductor H21 and a second terminal of the inductor H22 are electrically connected to the current output terminal 22, respectively, and a second terminal of the inductor H21 and a first terminal of the inductor H22 are electrically connected to the current input terminal 21, respectively. Thus, the direction of current through inductor H21 is clockwise and the direction of current through inductor H12 is counter-clockwise.
It can be seen that for two inductors located in the same inductor group, for example H11 and H12, or H21 and H22, the directions of current flow are opposite. Furthermore, the direction of current flow is also reversed for two adjacent inductors located in different inductor groups, e.g. H12 and H21. Whereby the effect of electromagnetic radiation cancellation can be ensured.
In some embodiments, the preset direction may be a horizontal direction, a vertical direction, or other desired directions. That is, the inductors included in the inductor assembly may be arranged in a desired direction. For example, in the embodiments shown in fig. 1-5, the inductors included in the inductor assembly are arranged in a horizontal direction.
Fig. 6 is a schematic structural diagram of an inductor assembly according to yet another embodiment of the present disclosure. Fig. 6 differs from fig. 4 in that in the embodiment shown in fig. 6 the inductors comprised in the inductor assembly are arranged in a vertical direction.
Fig. 7 is a schematic structural diagram of an integrated circuit according to an embodiment of the disclosure. As shown in fig. 7, the integrated circuit 71 includes an inductor component 72. Inductor assembly 72 is an inductor assembly according to any of the embodiments of fig. 1-6.
By implementing the embodiment of the disclosure, the influence of inductive radiation on other circuits can be effectively eliminated, so that the upper limit range of the working frequency of the VCO is improved.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (12)

1. An inductor assembly comprising:
the inductor comprises N inductor groups arranged along a preset direction, wherein each inductor group comprises a first inductor and a second inductor which are arranged along the preset direction and electrically connected in parallel, the first inductor and the second inductor are in the shape of an open ring, and N is a positive integer;
with current passing through the inductor assembly, current passes through the first inductor in a first direction and current passes through the second inductor in a second direction, the first and second directions being opposite.
2. The inductor assembly of claim 1,
the first direction is one of a counterclockwise direction and a clockwise direction, and the second direction is the other of the counterclockwise direction and the clockwise direction.
3. The inductor assembly of claim 2, further comprising:
a current input for current into the inductor assembly;
a current output for current to flow out of the inductor assembly.
4. The inductor assembly of claim 3,
the first terminal of the first inductor and the second terminal of the second inductor are electrically connected to the current input terminal, respectively, and the second terminal of the first inductor and the first terminal of the second inductor are electrically connected to the current output terminal, respectively, so that the first direction is counterclockwise and the second direction is clockwise.
5. The inductor assembly of claim 3,
the first terminal of the first inductor and the second terminal of the second inductor are electrically connected to the current output terminal, respectively, and the second terminal of the first inductor and the first terminal of the second inductor are electrically connected to the current input terminal, respectively, so that the first direction is clockwise and the second direction is counterclockwise.
6. The inductor assembly of claim 1,
all inductors of the N inductor groups have the same opening direction.
7. The inductor assembly of claim 1,
the inner diameter of the split ring ranges from 10 to 80 microns.
8. The inductor assembly of claim 7,
the outer diameter of the split ring ranges from 30 to 100 microns.
9. The inductor assembly of claim 8,
the opening range of the split ring is 5-80 microns.
10. The inductor assembly of any one of claims 1-9,
in the case of N >1, if the second inductor in the ith inductor group is adjacent to the first inductor in the (i + 1) th inductor group, the direction of current passing through the second inductor in the ith inductor group is opposite to the direction of current passing through the first inductor in the (i + 1) th inductor group, wherein 1 ≦ i < N.
11. The inductor assembly of any one of claim 10,
and the N is 2.
12. An integrated circuit comprising the inductor assembly of any one of claims 1-11.
CN202210121265.1A 2022-02-09 2022-02-09 Inductor assembly and integrated circuit Active CN114446623B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050231303A1 (en) * 2004-04-16 2005-10-20 Chao-Liang Chang Tunable passive device
CN103782355A (en) * 2011-09-13 2014-05-07 丹麦科技大学 Integrated magnetic component
CN106030730A (en) * 2014-01-17 2016-10-12 马维尔国际贸易有限公司 Pseudo-8-shaped inductor
CN207116197U (en) * 2017-06-21 2018-03-16 联合汽车电子有限公司 Inductor
CN110120808A (en) * 2018-02-07 2019-08-13 联发科技股份有限公司 Switchable inductor device and oscillator arrangement
US20200343037A1 (en) * 2019-04-26 2020-10-29 Analog Devices International Unlimited Company Micro-scale planar-coil transformer with shield
CN112002539A (en) * 2020-08-31 2020-11-27 北京力通通信有限公司 Integrated inductor and integrated circuit capable of reducing far-end electromagnetic radiation
CN113012912A (en) * 2019-12-20 2021-06-22 株式会社索思未来 Inductor device and I/Q circuit or integrated circuit comprising same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050231303A1 (en) * 2004-04-16 2005-10-20 Chao-Liang Chang Tunable passive device
CN103782355A (en) * 2011-09-13 2014-05-07 丹麦科技大学 Integrated magnetic component
CN106030730A (en) * 2014-01-17 2016-10-12 马维尔国际贸易有限公司 Pseudo-8-shaped inductor
CN207116197U (en) * 2017-06-21 2018-03-16 联合汽车电子有限公司 Inductor
CN110120808A (en) * 2018-02-07 2019-08-13 联发科技股份有限公司 Switchable inductor device and oscillator arrangement
US20200343037A1 (en) * 2019-04-26 2020-10-29 Analog Devices International Unlimited Company Micro-scale planar-coil transformer with shield
CN113012912A (en) * 2019-12-20 2021-06-22 株式会社索思未来 Inductor device and I/Q circuit or integrated circuit comprising same
CN112002539A (en) * 2020-08-31 2020-11-27 北京力通通信有限公司 Integrated inductor and integrated circuit capable of reducing far-end electromagnetic radiation

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