CN112489922B - Inductive device - Google Patents

Abstract

An inductive device includes a first wiring, a second wiring, a third wiring, a fourth wiring, a first capacitor and a second capacitor. The first trace includes at least two sub traces, and one ends of the at least two sub traces are coupled to the first node. The second trace includes at least two sub traces, and one ends of the at least two sub traces are coupled to the second node. One end of the third wire is coupled to the second wire, and the other end of the third wire is coupled to the first input and output terminals. One end of the fourth wire is coupled to the first wire, and the other end of the fourth wire is coupled to the second input and output end. The first capacitor is coupled between the first node and the second node. The second capacitor is coupled between the first node and the first input-output terminal, or between the first node and the second input-output terminal, or between the first input-output terminal and the second input-output terminal.

Description

Inductive device

technical field

The present disclosure relates to an electronic device, and in particular, to an inductive device.

Background technique

Radio frequency (RF) devices will generate double harmonics (harmonic), triple harmonics, etc. during operation, and the above harmonics will have adverse effects on the rest of the circuit. For example, the double frequency harmonics of a 2.4GHz circuit will generate a 5GHz signal and have an adverse effect on the integrated circuit (SOC).

Generally, the way to solve the influence of the above harmonics on the circuit is to set up a filter outside the circuit to sense the high-frequency signal of the adjacent components and design and select the required frequency and the frequency that does not need to be filtered out. However, the filter provided outside the circuit will affect the performance of the circuit itself and additional costs, such as the cost of being provided on a printed circuit board (PCB).

SUMMARY OF THE INVENTION

A technical embodiment of the present disclosure relates to an inductive device including a first trace, a second trace, a third trace, a fourth trace, a first capacitor, and a second capacitor. The first trace includes at least two sub traces, and one ends of the at least two sub traces are coupled to the first node. The second trace includes at least two sub traces, and one ends of the at least two sub traces are coupled to the second node. The third trace and the first trace are disposed on the first side, one end of the third trace is coupled to one of the at least two sub traces of the second trace, and the other end of the third trace is coupled to the first trace input and output. The fourth trace and the second trace are arranged on the second side, one end of the fourth trace is coupled to one of the at least two sub traces of the first trace, and the other end of the fourth trace is coupled to the second trace input and output. The first capacitor is coupled between the first node and the second node. The second capacitor is coupled between the first node and the first input/output terminal, or between the first node and the second input/output terminal, or between the first input/output terminal and the second input/output terminal between.

Therefore, according to the technical content of the present disclosure, the capacitor in the inductive device shown in the embodiment of the present disclosure can form a low-frequency blocking function, so that the low-frequency signal induced by the inductive device cannot pass but the high-frequency signal can directly pass. For example, the low frequency signal, such as the main operating frequency of 2.4GHz, cancels the induced signal of the main operating frequency through the folded inductor structure of the inductor device, so the folded inductor structure does not affect the characteristics of the operating frequency of the inductor. And the signal induced on the zigzag second line will be cancelled due to the reverse direction. If the central inductor structure has high-frequency signals, such as 2 times the harmonic 5GHz, because the high-frequency signal capacitor is turned on, the high-frequency signal is caused by The zigzag inductance structure forms an inductive inductance around a circle through the capacitance, and then the inductive structure claimed in the present disclosure induces a 5GHz harmonic signal that is more than ten times corresponding to 2.4GHz. The user then applies the 5GHz signal in the circuit, for example, after amplifying the signal, cancels the 5GHz harmonics of the operating frequency, and the application of the amplifier circuit can be optimized and adjusted by a well-known circuit designer. In this way, the adverse effect on the 5GHz circuit can be reduced.

Furthermore, since the present disclosure disposes the filter in the inductive device, there is no need to dispose the filter outside the inductive device, so as to prevent the external filter from affecting the performance of the circuit itself or adding extra cost. In addition, the capacitors in the inductive device of the embodiments of the present disclosure can not only form a function of filtering out low frequency (for example, filtering out second-order harmonics), but also can configure a plurality of capacitors to filter higher-frequency signals (for example, filtering out second-order harmonics). Fourth-order harmonics) are guided and filtered out by means of a short circuit to avoid the adverse effects of the fourth-order harmonics of the original circuit.

Description of drawings

In order to make the above and other objects, features, advantages and embodiments of the present disclosure more clearly understood, the descriptions of the accompanying drawings are as follows:

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 present disclosure.

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

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

FIG. 5 is a schematic diagram illustrating an inductive device according to an embodiment of the present disclosure.

FIG. 6 is a schematic diagram illustrating an inductive device according to an embodiment of the present disclosure.

FIG. 7 is a schematic diagram illustrating experimental data of an inductive device according to an embodiment of the present disclosure.

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 disclosure. Furthermore, the same or similar reference numerals are used to refer to similar elements/components among the different drawings.

Symbol Description

1000, 1000A～1000D: Inductive device

1100, 1100A～1100C: the first wiring

1110, 1110A～1110C: The first sub-line

1120, 1120A～1120C: The second sub wiring

1200, 1200A～1200C: the second wiring

1210, 1210A～1210C: The third sub wiring

1220, 1220A～1220C: the fourth sub-line

1300, 1300A～1300C: the third wiring

1310, 1310A～1310C: Fifth sub-line

1320, 1320A～1320C: The sixth sub-line

1400, 1400A～1400C: the fourth wiring

1410, 1410A～1410C: the seventh sub-line

1420, 1420A～1420C: Eighth sub-line

1500, 1500A～1500C: Center tap end

5000C, 5000D: Inductance

C1, C2, C3: Capacitors

E1, E2: Curve

IO1, IO2: input and output terminals

N1: the first node

N2: second node

Detailed ways

FIG. 1 is a schematic diagram illustrating an inductive device 1000 according to an embodiment of the present disclosure. In order to make the inductance device 1000 in FIG. 1 easier to understand, the structural design diagram of the inductance device 1000 in FIG. 1 is simplified as a schematic diagram of the inductance device 1000 in FIG. 2 .

Please refer to FIG. 1 and FIG. 2 at the same time, the inductive device 1000 includes a first trace 1100 , a second trace 1200 , a third trace 1300 , a fourth trace 1400 , a first capacitor C1 and a second capacitor C2 . Furthermore, the first trace 1100 includes at least two sub traces 1110 and 1120 . The second trace 1200 includes at least two sub traces 1210 and 1220 .

In one embodiment, one end (the lower end) of the at least two sub-wires 1110 and 1120 is coupled to the first node N1. One end (the lower end) of the at least two sub-wires 1210 and 1220 is coupled to the second node N2. The first capacitor C is coupled between the first node N1 and the second node N2.

In addition, the first trace 1100 and the third trace 1300 are disposed on the first side of the inductance device 1000 . For example, the first trace 1100 and the third trace 1300 are both disposed on the left side of the inductive device 1000 , and the third trace 1300 is disposed outside the first trace 1100 . One end of the third trace 1300 is coupled to one of the at least two sub traces 1210 and 1220 of the second trace 1200 , and the other end of the third trace 1300 is coupled to the first input and output terminal IO1 .

In addition, the second trace 1200 and the fourth trace 1400 are disposed on the second side of the inductor device 1000 . For example, both the second trace 1200 and the fourth trace 1400 are disposed on the right side of the inductive device 1000 , and the fourth trace 1400 is disposed outside the second trace 1200 . In addition, one end of the fourth trace 1400 is coupled to one of the at least two sub traces 1110 and 1120 of the first trace 1100, and the other end of the fourth trace 1400 is coupled to the second input and output terminal IO2. In one embodiment, the first side and the second side are located on opposite sides of the inductor device 1000 .

Furthermore, the first capacitor C1 is coupled between the first node N1 and the second node N2. The second capacitor C2 is coupled between the first node N1 and the first input and output terminal IO1. In this way, when a low frequency signal is to be transmitted from the first node N1 to the second node N2, it will be blocked by the first capacitor C1, for example, a 2.4 GHz signal will be blocked by the first capacitor C1. In addition, when the high-frequency signal is to be transmitted from the first node N1 to the second node N2, it can be transmitted through the first capacitor C1. For example, a 5GHz signal can be transmitted from the first node N1 to the second node N2 through the first capacitor C1. . Furthermore, if a higher frequency signal is to be transmitted from the first node N1 to the second node N2, a short circuit will be formed through the second capacitor C2, and the higher frequency signal will be guided to the first input and output terminal IO1 for filtering. , for example, the 10GHz signal will be filtered out by the second capacitor C2.

In one embodiment, each of the at least two sub-traces 1110, 1120 of the first trace 1100 includes a U-shaped sub-trace. For example, the sub-lines 1110 and 1120 are both U-shaped sub-lines. In addition, each of the at least two sub-traces 1210, 1220 of the second trace 1200 also includes a U-shaped sub-trace. For example, the sub-lines 1210 and 1220 are both U-shaped sub-lines. In addition, the third wire 1300 includes a U-shaped wire, and the fourth wire 1400 includes a U-shaped wire. However, the present disclosure is not limited to the embodiment shown in FIG. 2 , and in other embodiments, the traces and sub-traces may also be in other appropriate shapes, depending on actual requirements.

In another embodiment, the first traces 1100 , the second traces 1200 , the third traces 1300 and the fourth traces 1400 are crossed on the third side (eg, the upper side). In one embodiment, the first capacitor C1 and the second capacitor C2 are located on the fourth side (the following side). In addition, the third side and the fourth side are located on opposite sides of the inductor device 1000 .

In one embodiment, as shown in FIG. 1 and FIG. 2 , the inductive device 1000 further includes a third capacitor C3 . The third capacitor C3 is coupled between the second node N2 and the second input and output terminal IO2. In this way, when the low frequency signal is to be transmitted from the second node N2 to the first node N1, it will be blocked by the first capacitor C1. When the high frequency signal is to be transmitted from the second node N2 to the first node N1, it can be transmitted through the first capacitor C1. Furthermore, if the higher frequency signal is to be transmitted from the second node N2 to the first node N1, a short circuit will be formed through the third capacitor C3, and the higher frequency signal will be guided to the second input and output terminal IO2 for filtering. , for example, the 10GHz signal will be filtered out by the third capacitor C3.

Please refer to FIG. 1 and FIG. 2 at the same time, the first wiring 1100 includes a first sub wiring 1110 and a second sub wiring 1120 . Furthermore, the first sub-line 1110 and the second sub-line 1120 both include a first end and a second end. As shown in the figure, the second end (the lower end) of the first sub-wire 1110 is coupled to the second end (the lower end) of the second sub-wire 1120 .

In addition, the second trace 1200 includes a third sub trace 1210 and a fourth sub trace 1220 . Furthermore, the third sub-line 1210 and the fourth sub-line 1220 both include a first end and a second end. As shown in the figure, the second end (lower end) of the third sub-wire 1210 is coupled to the second end (lower end) of the fourth sub-wire 1220 .

Please refer to FIG. 1 and FIG. 2 at the same time, the third wiring 1300 includes a fifth sub wiring 1310 and a sixth sub wiring 1320 . Furthermore, the fifth sub-line 1310 and the sixth sub-line 1320 both include a first end and a second end. As shown in the figure, the first end (eg, the upper end) of the fifth sub-wire 1310 is coupled to the first end (eg, the upper end) of the fourth sub-wire 1220 . The first end (eg, the upper end) of the sixth sub-wire 1320 is coupled to the first end (eg, the upper end) of the third sub-wire 1210 . In addition, the second end (the lower end) of the sixth sub-wire 1320 is coupled to the first input and output end IO1. Furthermore, the second end (the lower end) of the sixth sub-wire 1320 is coupled to the first node N1 through the second capacitor C2. In one embodiment, the first input/output terminal IO1 is not coupled to the fifth sub-wire 1310 .

Please refer to FIG. 1 and FIG. 2 at the same time, the fourth trace 1400 includes a seventh sub trace 1410 and an eighth sub trace 1420 . Furthermore, the seventh sub-line 1410 and the eighth sub-line 1420 both include a first end and a second end. As shown in the figure, the first end (such as the upper end) of the seventh sub-line 1410 is coupled to the first end (such as the upper end) of the second sub-line 1120, and the second end (such as the lower end) of the seventh sub-line 1410 ) is coupled to the second input and output terminal IO2. Furthermore, the second end (the lower end) of the seventh sub-wire 1410 is coupled to the second node N2 through the third capacitor C3. The first end (such as the upper end) of the eighth sub-line 1420 is coupled to the first end (such as the upper end) of the first sub-line 1110, and the second end (such as the lower end) of the eighth sub-line 1420 is coupled to the first end (such as the upper end) of the eighth sub-line 1420. The second end (the end below) of the five sub-wires 1310 . In one embodiment, the second input/output terminal IO2 is not coupled to the eighth sub-wire 1420 .

In another embodiment, the inductive device 1000 further includes a center tap terminal 1500 . The center tap terminal 1500 is disposed and coupled to the junction of the third trace 1300 and the fourth trace 1400 . It should be noted that the present disclosure is not limited to the structure shown in FIG. 2 , which is only used to illustrate one of the implementation manners of the present disclosure.

FIG. 3 is a schematic diagram illustrating an inductive device 1000A according to an embodiment of the present disclosure. Compared with the inductive device 1000 shown in FIG. 2 , the coupling manner of the second capacitor C2 and the third capacitor C3 of the inductive device 1000A of FIG. 3 is different. As shown in FIG. 3 , the second capacitor C2 is coupled between the first node N1 and the second input/output terminal IO2 , and the third capacitor C3 is coupled between the second node N2 and the first input/output terminal IO1 . It should be noted that, in the embodiment of FIG. 3 , the element numbers are similar to those in FIG. 2 , and have similar structural features, so that the description is not repeated here. In addition, the present disclosure is not limited to the structure shown in FIG. 3 , which is only used to exemplarily show one of the implementation manners of the present disclosure.

FIG. 4 is a schematic diagram illustrating an inductive device 1000B according to an embodiment of the present disclosure. Compared with the inductive device 1000 shown in FIG. 2 , the coupling manner of the second capacitor C2 of the inductive device 1000B in FIG. 4 is different. As shown in FIG. 4 , the second capacitor C2 is coupled between the first input/output terminal IO1 and the second input/output terminal IO2 . It should be noted that, in the embodiment of FIG. 4 , the component numbers are similar to the component numbers in FIG. 2 , and have similar structural features. For the sake of brevity of the description, details are not repeated here. In addition, the present disclosure is not limited to the structure shown in FIG. 4 , which is only used to exemplarily show one of the implementation manners of the present disclosure.

FIG. 5 is a schematic diagram illustrating an inductive device 1000C according to an embodiment of the present disclosure. Compared with the inductor device 1000 shown in FIG. 1 , an inductor 5000C can be configured inside the inductor device 1000C of FIG. 5 . It should be noted that, in the embodiment of FIG. 5 , the component numbers are similar to the component numbers in FIG. 1 , and have similar structural features. For the sake of brevity of the description, detailed descriptions are not repeated here. Furthermore, the present disclosure is not limited to the embodiment shown in FIG. 5 . In other embodiments, other forms and types of inductance devices can be configured inside the inductance device 1000C, depending on actual needs. In addition, the present disclosure is not limited to the structure shown in FIG. 5 , which is only used to illustrate one of the implementations of the present disclosure.

FIG. 6 is a schematic diagram illustrating an inductive device according to an embodiment of the present disclosure. Compared to FIG. 5 where the inductor 5000C is arranged inside the inductor device 1000C, the inductor device 1000D is arranged inside the inductor 5000D in FIG. 6 . It should be noted that, in the embodiment of FIG. 6 , the component numbers are similar to the component numbers in FIG. 5 , and have similar structural features. For the sake of brevity of the description, detailed descriptions are not repeated here. Furthermore, the present disclosure is not limited to the embodiment shown in FIG. 6 . In other embodiments, other types and types of inductance devices can be configured inside the inductor 5000D, such as the inductor devices 1000 to 1000B shown in FIGS. 1 to 4 . , depending on the actual needs. In addition, the present disclosure is not limited to the structure shown in FIG. 6 , which is only used to exemplarily show one of the implementation manners of the present disclosure.

FIG. 7 is a schematic diagram illustrating experimental data of an inductive device according to an embodiment of the present disclosure. As shown in the figure, using the structure configuration of the present disclosure, the experimental curves of the S parameters (scattering parameters) are E1 and E2, and the curve E1 is the experimental curve of the inductive device using capacitors with the same capacitance value. Capacitors, etc. are all used 330fF (farad). Curve E2 is an experimental curve of the inductive device using capacitors with different capacitance values. For example, part of the inductive device uses 330fF, and part of the capacitor uses 150fF. As can be seen from the figure, whether it is the curve E1 or the curve E2, the signal at 2.4GHz can be effectively filtered out, and the signal at 5GHz can be passed through. Furthermore, as shown in the figure, whether it is the curve E1 or the curve E2, the signals above 8 GHz all decrease. Therefore, the architecture configuration of the present disclosure can further filter out the signals above 8 GHz, for example, it can effectively filter out the signals above 10 GHz. Signal.

As can be seen from the above-described embodiments of the present disclosure, the application of the present disclosure has the following advantages. The inductance device shown in the embodiment of the present disclosure can induce high-frequency signals of a central inductor (such as the inductor 5000C in FIG. 5 ), such as second-order harmonics, after additional circuit amplification, so as to cancel the defects of the second-order harmonics of the original circuit influences. For example, the capacitance through the inductive device is mainly used for the technical effect of allowing high frequencies to pass through and blocking low frequencies. In this way, the same inductive device can have two different signal sensing methods relative to high and low frequencies.

Furthermore, since the present disclosure disposes the filter in an integrated circuit (IC), there is no need to dispose the filter outside the inductance device, so as to avoid the external filter affecting the performance of the circuit itself and its extra cost. In addition, the capacitors in the inductive device of the embodiments of the present disclosure can not only form a function of filtering out low frequency (for example, filtering out second-order harmonics), but also can configure a plurality of capacitors to filter higher-frequency signals (for example, filtering out second-order harmonics). Fourth-order harmonics) are guided and filtered out by means of a short circuit to avoid the adverse effects of the fourth-order harmonics of the original circuit.

Claims (10)

1. An inductive device comprising: a first trace, including at least two sub traces, wherein one end of the at least two sub traces is coupled to a first node; a second wiring, including at least two sub wirings, wherein one end of the at least two sub wirings is coupled to a second node; A third trace is disposed on a first side with the first trace, wherein one end of the third trace is coupled to one of the at least two sub traces of the second trace, the third trace The other end of the trace is coupled to a first input and output end; A fourth trace and the second trace are disposed on a second side, wherein one end of the fourth trace is coupled to one of the at least two sub traces of the first trace, the fourth trace is The other end of the trace is coupled to a second input and output end; a first capacitor coupled between the first node and the second node; and a second capacitor, coupled between the first node and the first input and output terminals, or between the first node and the second input and output terminals, or coupled to the first input and output terminals and between the second input and output terminals. 2. The inductive device of claim 1, further comprising: a third capacitor, coupled between the second node and the first input and output terminals, or between the second node and the second input and output terminals, wherein the second capacitor is coupled to the first input and output terminals between a node and the first input and output terminals, and the third capacitor is coupled between the second node and the second input and output terminals. 3. The inductive device of claim 2, wherein the at least two sub-traces of the first trace comprise: A first sub-trace, including: a first end; and a second end; and A second sub-trace, including: a first end; and a second end coupled to the first node with the second end of the first sub-wire; Wherein the at least two sub-lines of the second track include: A third sub-trace, including: a first end; and a second end; and A fourth sub-trace, including: a first end; and a second end coupled to the second node with the second end of the third sub-wire. 4. The inductive device of claim 3, wherein the third trace comprises: A fifth sub-line, including: a first end coupled to the first end of the fourth sub-wire; and a second end; and A sixth sub-line, including: a first end coupled to the first end of the third sub-wire; and a second end, coupled to the first input and output end, and coupled to the first node through the second capacitor; The at least two sub-lines of the fourth track include: A seventh sub-line, including: a first end coupled to the first end of the second sub-wire; and a second end, coupled to the second input and output end, and coupled to the second node through the third capacitor; and One and eighth sub-lines, including: a first end coupled to the first end of the first sub-wire; and a second end coupled to the second end of the five sub-wires. 5. The inductive device of claim 1, further comprising: a third capacitor coupled between the second node and the first input/output terminal, or between the second node and the second input/output terminal, wherein the second capacitor is coupled to the first input/output terminal between a node and the second input and output terminal, and the third capacitor is coupled between the second node and the first input and output terminal. 6. The inductive device of claim 5, wherein the at least two sub-traces of the first trace comprise: A first sub-trace, including: a first end; and a second end; and A second sub-trace, including: a first end; and a second end coupled to the first node with the second end of the first sub-wire; Wherein the at least two sub-lines of the second track include: A third sub-trace, including: a first end; and a second end; and A fourth sub-trace, including: a first end; and a second end coupled to the second node with the second end of the third sub-wire. 7. The inductive device of claim 6, wherein the third trace comprises: A fifth sub-line, including: a first end coupled to the first end of the fourth sub-wire; and a second end; and A sixth sub-line, including: a first end coupled to the first end of the third sub-wire; and a second terminal, coupled to the first input and output terminal, and coupled to the second node through the third capacitor; The at least two sub-lines of the fourth track include: A seventh sub-line, including: a first end coupled to the first end of the second sub-wire; and a second end coupled to the second input and output end and coupled to the first node through the second capacitor; and One and eighth sub-lines, including: a first end coupled to the first end of the first sub-wire; and a second end coupled to the second end of the five sub-wires. 8. The inductive device of claim 1, wherein each of the at least two sub-traces of the first trace comprises a U-shaped sub-trace, wherein the at least two sub-traces of the second trace Each of the wires includes a U-shaped sub-trace, wherein the third trace includes a U-shaped trace, and wherein the fourth trace includes a U-shaped trace. 9 . The inductive device of claim 1 , wherein the third trace is disposed outside the first trace, wherein the fourth trace is disposed outside the second trace, and the first side and the The second side is on opposite sides of the inductive device. 10. The inductive device of claim 1, wherein the first trace, the second trace, the third trace and the fourth trace are alternately coupled on a third side, wherein the first capacitor and the second capacitor is located on a fourth side, wherein the third side and the fourth side are located on opposite sides of the inductance device.

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