Inductance device with dynamic inductance value adjustment mechanism
By introducing a switching circuit into the inductor device, the coupling state between the secondary coil and the main coil is changed, thereby dynamically adjusting the inductor value, solving the problem of increasing circuit area caused by inductance diversity in the prior art.
Patent Information
- Application Number
- CN202311541064.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-17
- Publication Date
- 2025-05-20
AI Technical Summary
In the prior art, in order to respond to the needs of different circuits, different inductors need to be set, resulting in an increase in the circuit area.
An inductor device with a dynamic inductance value adjustment mechanism is designed. The secondary coil is selectively isolated or electrically coupled to the main coil through a switching circuit, changing the equivalent coil width, thereby switching different equivalent coil inductance values.
Dynamic adjustment of inductance value is realized, reducing the circuit area occupation, and switching different inductance values according to different needs.
Smart Images
Figure CN120020976A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to inductance technology, and more particularly to an inductance device having a dynamic inductance value adjustment mechanism. Background Art
[0002] An inductor is an electronic component that generates an electromotive force against current changes according to the flowing current. In current integrated circuit designs, different circuits operating in multiple frequency bands are often integrated on a single chip. To meet the requirements of these different circuits, different inductors are often required to be configured to match these circuits, resulting in an increase in circuit area. Summary of the Invention
[0003] In view of the problems of the prior art, an object of the present invention is to provide an inductance device having a dynamic inductance value adjustment mechanism to improve the prior art.
[0004] The present invention includes an inductance device having a dynamic inductance value adjustment mechanism, including: a main coil, a secondary coil, and a pair of switching circuits. The main coil has a main coil body and a pair of main terminals, and the pair of main terminals are electrically coupled to an external circuit. The secondary coil has a secondary coil body electrically coupled to the main coil body and a pair of secondary terminals, wherein the first of the main coil body and the secondary coil body surrounds the second of the main coil body and the secondary coil body. The switching circuit is configured to float the pair of secondary terminals in a first mode and electrically couple the pair of secondary terminals to the pair of main terminals in a second mode.
[0005] The features, embodiments, and effects of the present application are described in detail in the following preferred embodiments in conjunction with the accompanying drawings. Brief Description of the Drawings
[0006] Figure 1A And Figure 1B Respectively show a schematic diagram of an inductance device having a dynamic inductance value adjustment mechanism in an embodiment of the present invention;
[0007] Figure 2 Show a relationship diagram of the operating frequency and inductance value of the inductance device when the switching circuit operates in the first mode and the second mode in an embodiment of the present invention;
[0008] Figure 3 Show a schematic diagram of an inductance device having a dynamic inductance value adjustment mechanism in an embodiment of the present invention;
[0009] Figure 4 Show a relationship diagram of the operating frequency and inductance value of the inductance device when the switching circuit operates in the first mode and the second mode in an embodiment of the present invention; and
[0010] Figures 5A to 5CSchematic diagrams showing an inductor device with a dynamic inductance value adjustment mechanism in an embodiment of the present invention are respectively shown. Detailed implementation manners
[0011] An object of the present invention is to provide an inductor device with a dynamic inductance value adjustment mechanism. By the operation of a switching circuit, the secondary coil is selectively electrically isolated or electrically coupled to the primary coil, resulting in a change in the equivalent coil width, and further achieving the purpose of switching different equivalent coil inductance values.
[0012] Please refer to Figure 1A and Figure 1B . Figure 1A and Figure 1B Schematic diagrams showing an inductor device 100 with a dynamic inductance value adjustment mechanism in an embodiment of the present invention are respectively shown.
[0013] The inductor device 100 includes: a primary coil 110, a secondary coil 120, and a pair of switching circuits 130A and 130B.
[0014] The primary coil 110 has a primary coil body 140 and a pair of primary terminals TPA and TPB. The primary terminals TPA and TPB are electrically coupled to an external circuit (not shown). In an embodiment, the inductor device 100 can be disposed in a voltage controlled oscillator (not shown) to be electrically coupled to other circuit components of the voltage controlled oscillator, so as to achieve the purpose of generating oscillations according to a control voltage. However, the present invention is not limited thereto.
[0015] In an embodiment, the secondary coil 120 and the primary coil 110 are disposed on the same circuit layer. The secondary coil 120 has a secondary coil body 150 electrically coupled to the primary coil body 140 and a pair of secondary terminals TSA and TSB. In Figure 1A and Figure 1B 's embodiments, the secondary coil body 150 and the primary coil body 140 are electrically coupled through a coupling structure 160. In an embodiment, the coupling structure 160 can serve as a central tap of the primary coil 110 and the secondary coil 120.
[0016] The first of the primary coil body 140 and the secondary coil body 150 surrounds the second of the primary coil body 140 and the secondary coil body 150. In Figure 1A and Figure 1B 's embodiments, the secondary coil body 150 surrounds the primary coil body 140. It should be noted that in Figure 1A and Figure 1BIn an embodiment, both the main coil body 140 and the secondary coil body 150 are single-turn coils. However, the present invention is not limited to coils with a specific number of turns. When the secondary coil body 150 is a multi-turn coil, the coil structures of these turns are arranged to surround the main coil body 140.
[0017] The switch circuits 130A, 130B are configured to Figure 1A float the pair of secondary terminals TSA, TSB in the first mode shown, and Figure 1B electrically couple the pair of secondary terminals TSA, TSB to the pair of primary terminals TPA, TPB in the second mode shown. In one embodiment, the switch circuits 130A, 130B can operate in the first mode or the second mode according to the control of the control signal CS in different states (such as logic high state and logic low state).
[0018] When the switch circuits 130A, 130B operate in the second mode, the equivalent coil width of the inductance device 100 increases compared to when the switch circuits 130A, 130B operate in the first mode, and further causes the equivalent coil inductance value of the inductance device 100 to decrease relative to when the switch circuits 130A, 130B operate in the first mode.
[0019] More specifically, when the switch circuits 130A, 130B operate in the first mode, the equivalent coil width of the inductance device 100 is the width of the main coil body 140 of the main coil 110. When the switch circuits 130A, 130B operate in the second mode, the equivalent coil width of the inductance device 100 is the sum of the width (wire diameter) of the main coil body 140 of the main coil 110 and the width of the secondary coil body 150 of the secondary coil 120.
[0020] Since the larger the equivalent coil width of the inductance device 100, the smaller the equivalent coil inductance value, the equivalent coil inductance value of the inductance device 100 when the switch circuits 130A, 130B operate in the second mode will be smaller than the equivalent coil inductance value of the inductance device 100 when the switch circuits 130A, 130B operate in the first mode. Regarding the calculation methods of the equivalent coil width and the equivalent coil inductance value, reference can be made to the paper "Simple Accurate Expressions for Planar Spiral Inductances" in the journal IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL.34, NO.10, OCTOBER 1999, which will not be elaborated here.
[0021] Please refer to Figure 2 . Figure 2Displays a graph showing the relationship between the operating frequency and the inductance value of the inductance device 100 when the switching circuits 130A and 130B operate in the first mode and the second mode in an embodiment of the present invention.
[0022] In Figure 2 , the horizontal axis represents the frequency in gigahertz (GHz), and the vertical axis represents the inductance value in nanohenries (nH). The line segment L1 drawn in solid line corresponds to the performance of the inductance device 100 when the switching circuits 130A and 130B operate in the first mode, and the line segment L2 drawn in dashed line corresponds to the performance of the inductance device 100 when the switching circuits 130A and 130B operate in the second mode.
[0023] As Figure 2 shown, taking the operating frequency of 5 GHz as an example, the inductance value (0.2771 nanohenry) of the inductance device 100 when the switching circuits 130A and 130B operate in the first mode is larger than the inductance value (0.2593 nanohenry) when the switching circuits 130A and 130B operate in the second mode.
[0024] Therefore, the inductance device of the present invention can, through the operation of the switching circuit, selectively electrically isolate or electrically couple the secondary coil from the primary coil, resulting in a change in the equivalent coil width, and further achieving the purpose of switching different equivalent coil inductance values. In an embodiment, when the inductance device 100 is disposed in the above-mentioned voltage-controlled oscillator, the control signal CS can be generated according to the required oscillation frequency of the voltage-controlled oscillator to control the operating mode of the switching circuits 130A and 130B, and then change the oscillation frequency to the required frequency value according to different equivalent coil inductance values.
[0025] Please refer to Figure 3 . Figure 3 Displays a schematic diagram of an inductance device 300 having a dynamic inductance value adjustment mechanism in an embodiment of the present invention.
[0026] The inductance device 300 is similar to the inductance device 100 and includes: a primary coil 110, a secondary coil 120, and switching circuits 130A and 130B. However, in this embodiment, the secondary coil body 150 of the secondary coil 120 is surrounded by the primary coil body 140 of the primary coil 110.
[0027] Please refer to Figure 4 . Figure 4 Displays a graph showing the relationship between the resonance frequency and the inductance value of the inductance device 300 when the switching circuits 130A and 130B operate in the first mode and the second mode in an embodiment of the present invention.
[0028] In Figure 4In this figure, the horizontal axis represents the frequency in gigahertz (GHz), and the vertical axis represents the inductance value in nanohenries (nH). The line segment L1 drawn in solid line corresponds to the performance of the inductance device 300 when the switching circuits 130A and 130B operate in the first mode, and the line segment L2 drawn in dashed line corresponds to the performance of the inductance device 300 when the switching circuits 130A and 130B operate in the second mode.
[0029] As Figure 4 shown, taking the operating frequency of 10 GHz as an example, the inductance value (0.2571 nanohenry) of the inductance device 300 when the switching circuits 130A and 130B operate in the first mode is larger than the inductance value (0.2242 nanohenry) when the switching circuits 130A and 130B operate in the second mode.
[0030] In the above embodiments, the number of secondary coils is taken as an example for illustration. In other embodiments, the number of secondary coils can be multiple and can be arranged relative to the primary coil in different ways.
[0031] Please refer to Figures 5A to 5C . Figures 5A to 5C Schematic diagrams showing an inductance device 500 with a dynamic inductance value adjustment mechanism in an embodiment of the present invention.
[0032] The inductance device 500 includes: a primary coil 510, secondary coils 520, 530, a pair of switching circuits 540A, 540B, and a pair of switching circuits 550A, 550B. The switching circuits 540A, 540B correspond to the secondary coil 520 to operate in the first mode or the second mode. The switching circuits 550A, 550B correspond to the secondary coil 530 to operate in the first mode or the second mode.
[0033] In Figure 5A the example, the secondary coil bodies (not labeled) of the secondary coils 520, 530 surround the primary coil body (not labeled) of the primary coil 510 from large to small. In Figure 5B the example, the secondary coil bodies (not labeled) of the secondary coils 520, 530 are surrounded by the primary coil body (not labeled) of the primary coil 510 from large to small. And in Figure 5C the example, the secondary coil body (not labeled) of the first part (such as the secondary coil 520) of the secondary coils 520, 530 surrounds the primary coil body (not labeled) of the primary coil 510, and the secondary coil body (not labeled) of the second part (such as the secondary coil 530) of the secondary coils 520, 530 is surrounded by the primary coil body (not labeled) of the primary coil 510.
[0034] The above embodiments take two secondary coils as examples. In other embodiments, the number of secondary coils can also be greater than two, and the number arranged to surround the primary coil or surrounded by the primary coil can be configured according to actual needs. When the number of secondary coils is larger, the number of equivalent coil inductance values that the inductance device can adjust can also increase.
[0035] It should be noted that the above implementation manners are only examples. In other embodiments, those with ordinary knowledge in the art can make changes without departing from the spirit of the present invention.
[0036] In summary, the inductance device in the present invention can, by the operation of the switching circuit, selectively electrically isolate or electrically couple the secondary coil from the primary coil, resulting in a change in the equivalent coil width, and further achieving the purpose of switching different equivalent coil inductance values.
[0037] Although the embodiments of the present application are as described above, the embodiments are not used to limit the present application. Those with ordinary knowledge in the technical field can make changes to the technical features of the present application based on the explicit or implicit content of the present application. All such changes may fall within the scope of patent protection sought by the present application. In other words, the scope of patent protection of the present application shall be determined by what is defined in the claims of this specification.
Symbol Description
Claims
1. An inductor device with a dynamic inductance adjustment mechanism, characterized in that: Include: a primary coil having a primary coil body and a pair of primary terminals electrically coupled to an external circuit; a secondary coil having a secondary coil body electrically coupled to the primary coil body and a pair of secondary terminals, wherein a first one of the primary coil body and the secondary coil body surrounds a second one of the primary coil body and the secondary coil body; and A pair of switch circuits are configured to float the pair of secondary terminals in a first mode and electrically couple the pair of secondary terminals to the pair of primary terminals in a second mode.
2. The inductive device according to claim 1, wherein: The secondary coil body surrounds the primary coil body.
3. The inductive device according to claim 1, wherein: The secondary coil body is surrounded by the primary coil body.
4. The inductive device according to claim 1, wherein: The inductive device includes N secondary coils of different sizes and N pairs of switch circuits corresponding to the N secondary coils to work in the first mode or the second mode.
5. The inductive device according to claim 4, characterized in that The secondary coil bodies of the N secondary coils surround the main coil body from large to small.
6. The inductive device according to claim 4, characterized in that The secondary coil bodies of the N secondary coils are surrounded by the main coil body from largest to smallest.
7. The inductive device according to claim 4, wherein: A first portion of the secondary coil bodies among the N secondary coils surrounds the primary coil body from large to small, and a second portion of the secondary coil bodies among the N secondary coils are surrounded by the primary coil body from large to small.
8. The inductive device according to claim 1, wherein: When the pair of switch circuits operates in the second mode, an equivalent coil width of the inductor device increases compared to when the pair of switch circuits operates in the first mode, and further an equivalent coil inductance value of the inductor device decreases compared to when the pair of switch circuits operates in the first mode.
9. The inductive device according to claim 1, wherein: The primary coil and the secondary coil are arranged on a same circuit layer.
10. The inductive device according to claim 1, wherein: The inductor device is arranged in a voltage controlled oscillator to control the pair of switch circuits according to a control signal generated by the voltage controlled oscillator at a required oscillation frequency.