TWI779865B - Inductor device - Google Patents

Abstract

An inductor device includes a first trace, a second trace, and a primary switch. The first trace includes a first sub-trace, a secondary switch and a second sub-trace. The first sub-trace includes a first line and a second line. The secondary switch is configured to switch the first sub-trace to the first line or switch the first sub-trace to the second line. The second sub-trace is coupled to one terminal of the first sub-trace at a first node. The second trace includes a third sub-trace and a fourth sub-trace. The fourth sub-trace is coupled to one terminal of the third sub-trace at a second node. The primary switch is coupled to the first node and the second node.

Description

Inductive device

This case relates to an electronic device, and in particular to an inductive device.

Radio frequency (RF) devices will generate double frequency harmonics (harmonic), triple frequency harmonics, etc. during operation, and the above harmonics will have adverse effects on other circuits. For example, the double-frequency harmonic of a 2.4GHz circuit will generate a signal of about 5GHz, which will adversely affect the 5GHz circuit.

Generally, the way to solve the influence of the above-mentioned harmonics on the circuit is to set a filter outside the circuit to filter out the above-mentioned harmonics or to improve the characteristics of the circuit and inductance. However, the filter provided outside the circuit will affect the performance of the circuit itself and generate additional costs.

One technical aspect of this case relates to an inductance device, which includes a first wiring, a second wiring and a second switch. The first wiring includes a first sub-wiring, a first switch and a second sub-wiring. The first sub-route includes a first circuit and a second circuit. The first switch is used for switching the first sub-wire to the first circuit or switching the first sub-wire to the second circuit. One end of the second sub-wire and the first sub-wire is coupled to the first node. The second routing includes a third sub-routing and a fourth sub-routing. One end of the fourth sub-wire and the third sub-wire is coupled to the second node. The second switch is coupled between the first node and the second node.

Therefore, according to the technical content of this case, the switch in the inductance device shown in the embodiment of this case can form a low-frequency filtering function, so that the low-frequency signal induced by the inductance device cannot pass through, and the high-frequency signal can directly pass through. For low-frequency signals, such as the main operating frequency of 2.4GHz, the folded inductor of the inductor device cancels the induction signal of the main operating frequency, so the folded inductor structure will not affect the operating frequency of the inductor. characteristics, and if there is a high-frequency signal in the central inductive structure, such as 2 times the harmonic 5GHz, because the high-frequency signal can be transmitted through the switch, the high-frequency signal passes through the switch through the tortuous inductive structure to form a circle. Inductive inductance, and then the inductive structure advocated in this case induces a 5GHz harmonic signal corresponding to ten times more than 2.4GHz. The user then applies the 5GHz signal to the circuit, such as amplifying the signal and then canceling the 5GHz harmonic of the operating frequency, and the application of the amplifying circuit can be optimized and adjusted by a familiar circuit designer. In this way, the adverse effect on the 5GHz circuit can be reduced. Furthermore, since the switching of the switch is used for filtering in this case, it is equivalent to setting the filter in the inductance device. Therefore, there is no need to install a filter outside the inductance device, so as to prevent the external filter from affecting the performance of the circuit itself or is an additional fee.

FIG. 1 is a schematic diagram illustrating an inductance device 1000 according to an embodiment of the present invention. As shown in the figure, the inductance device 1000 includes a first wire 1100 , a second wire 1200 and a switch SW1 . Moreover, the first wiring 1100 includes a first sub-wiring 1110 and a second sub-wiring 1120 . One end of the first sub-wire 1110 and one end of the second sub-wire 1120 are coupled to the first node N1. The second wire 1200 includes a third sub-wire 1210 and a fourth sub-wire 1220 . One end of the third sub-wire 1210 and one end of the fourth sub-wire 1220 are coupled to the second node N2. The switch SW1 is coupled between the first node N1 and the second node N2. In operation, when the low frequency signal is generated, the switch SW1 is closed, so that the low frequency signal cannot pass through. On the other hand, when the high-frequency signal is generated, the switch SW1 is turned on, so that the high-frequency signal passes through the switch SW1 from the inductance device 1000 to form an induction inductance around a circle. It should be noted that the present application is not limited to the structure shown in FIG. 1 , which is only used to illustrate one of the implementations of the present application.

FIG. 2 is a schematic diagram illustrating a partial structure 1900 of the inductance device 1000 shown in FIG. 1 according to an embodiment of the present invention. As shown in the figure, the first sub-wire 1110 includes a first line 1111 , a second line 1113 and a switch SW2 . The switch SW2 is used to switch the first sub-wire 1110 to the first line 1111 or switch the first sub-wire 1110 to the second line 1113 . In one embodiment, the length of the first line 1111 is greater than the length of the second line 1113 . Therefore, when the first sub-wire 1110 is switched to the first line 1111, the inductance of the first sub-wire 1110 is relatively large. Relatively speaking, when the first sub-route 1110 is switched to the second circuit 1113 , the inductance value of the first sub-route 1110 is relatively small.

In one embodiment, the first circuit 1111 includes a plurality of first coils 1111 , and the second circuit 1113 includes a second coil 1113 . In detail, the first circuit 1111 is wound into a plurality of first coils 1111, and the second circuit 1113 is the second coil 1113 referred to in the figure.

As shown in the figure, the switch SW2 is used to switch the first sub-wire 1110 to the plurality of first coils 1111 , or the switch SW2 is used to switch the first sub-wire 1110 to the second coil 1113 . Therefore, when the switch SW2 is closed, the signal will be transmitted through the plurality of first coils 1111 of the first sub-wire 1110 . On the contrary, when the switch SW2 is turned on, the signal will be transmitted through the second coil 1113 of the first sub-wire 1110 . In another embodiment, the plurality of first coils 1111 are located on the first layer and the second coils 1113 are located on the second layer. In one embodiment, the first layer and the second layer belong to different layers.

In one embodiment, the second sub-wire 1120 includes a third line 1121 , a fourth line 1123 and a switch SW3 . The switch SW3 is used to switch the second sub-wire 1120 to the third line 1121 or switch the second sub-wire 1120 to the fourth line 1123 . In one embodiment, the length of the third line 1121 is greater than the length of the fourth line 1123 . Therefore, when the second sub-wire 1120 is switched to the third line 1121 , the inductance of the second sub-wire 1120 is relatively large. Relatively speaking, when the second sub-wire 1120 is switched to the fourth line 1123 , the inductance value of the second sub-wire 1120 is relatively small.

In one embodiment, the third circuit 1121 includes a plurality of third coils 1121 , and the fourth circuit 1123 includes a fourth coil 1123 . In detail, the third circuit 1121 is wound into a plurality of third coils 1121, and the fourth circuit 1123 is the fourth coil 1123 referred to in the figure.

As shown in the figure, the switch SW3 is used to switch the second sub-wire 1120 to a plurality of third coils 1121 , or the switch SW3 is used to switch the second sub-wire 1120 to the fourth coil 1123 . Therefore, when the switch SW3 is turned off, the signal is transmitted through the plurality of third coils 1121 of the second sub-wire 1120 . On the contrary, when the switch SW3 is turned on, the signal will be transmitted through the fourth coil 1123 of the second sub-wire 1120 . In another embodiment, the plurality of third coils 1121 are located on the first layer and the fourth coils 1123 are located on the second layer. In one embodiment, the first layer and the second layer belong to different layers.

In one embodiment, the fourth coil 1123 partially overlaps the plurality of first coils 1111 . In another embodiment, the fourth coil 1123 partially overlaps the plurality of third coils 1121 . In yet another embodiment, the second coil 1113 does not overlap with the plurality of first coils 1111 and the plurality of third coils 1121 . In one embodiment, the plurality of first coils 1111 and the plurality of third coils 1121 are arranged alternately. For example, the arrangement order of the plurality of first coils 1111 and the plurality of third coils 1121 can be "first coil 1111, third coil 1121, first coil 1111, third coil 1121, first coil 1111."

Please refer to FIG. 1 , in one embodiment, both the first sub-trace 1110 and the second sub-trace 1120 include a first end and a second end. As shown in the figure, the first end (such as the upper end) of the first sub-trace 1110 and the first end (such as the upper end) of the second sub-trace 1120 are coupled to the first node N1. In addition, both the third sub-wire 1210 and the fourth sub-wire 1220 include a first end and a second end. As shown in the figure, the first end (such as the upper end) of the third sub-trace 1210 and the first end (such as the upper end) of the fourth sub-trace 1220 are coupled to the second node N2.

In one embodiment, the first sub-trace 1110 and the second sub-trace 1120 are disposed on the first side of the inductor device 1000 (the left side in the figure), and the third sub-trace 1210 and the fourth sub-trace 1220 are disposed On the second side of the inductive device 1000 (the right side in the figure). In another embodiment, the first side and the second side are located on opposite sides of the inductance device 1000 .

Please refer to FIG. 2 , in one embodiment, the inductive device 1000 further includes a first connecting member 1400 . The first connecting member 1400 includes a first end and a second end. As shown in the figure, the first end (the upper end in the figure) of the first connector 1400 is coupled to the node N4 and the node N5 with the first line 1111 and the second line 1113 respectively. The second end (the lower end in the figure) of the first connecting member 1400 is coupled to the first line 1111 of the first sub-trace 1110 . In another embodiment, the first connecting element 1400 is located on the second layer, and the first sub-trace 1110 is located on the first layer.

In one embodiment, the inductive device 1000 further includes a second connecting element 1500 . The second connecting member 1500 includes a first end and a second end. As shown in the figure, the first end (the upper end in the figure) of the second connecting member 1500 is coupled to the same point (N3 in the figure) with the third line 1121 and the fourth line 1123 . The second end (the lower end in the figure) of the second connecting member 1500 is coupled to the third line 1121 of the second sub-trace 1120 . In another embodiment, the second connecting element 1500 is located on the second layer, and the second sub-trace 1120 is located on the first layer. It should be noted that the second figure of this application only exemplarily shows the partial structure 1900 in the upper left corner of the inductive device 1000, however, the same structure 1900 can also be used in the lower left corner, upper right corner and lower right corner of the inductive device 1000, Furthermore, different circuits are generated by switching the switches of the structure 1900 . In addition, the present application is not limited to the structure shown in FIG. 2 , which is only used to illustrate one of the implementations of the present application.

FIG. 3 is a schematic diagram illustrating an inductance device 1000A according to an embodiment of the present application. Compared with the inductance device 1000 shown in FIG. 1 , the inductance device 1000A in FIG. 3 further includes a capacitor C. The capacitor C is coupled between the first node N1 and the second node N2. In one embodiment, the capacitor C is connected in parallel with the switch SW1. It should be noted that, in the embodiment in FIG. 3 , the component numbers are similar to the component numbers in FIG. 1 , and have similar structural features. For the sake of brevity, details are not repeated here. In addition, the present application is not limited to the structure shown in FIG. 3 , which is only used to illustrate one of the implementations of the present application.

FIG. 4 is a partial structural schematic diagram of an inductance device 1000A as shown in FIG. 3 according to an embodiment of the present application. As shown in the figure, the capacitor C and the switch SW1 are connected in parallel to the first terminal N1 and the second terminal N2. In operation, when the switch SW1 is closed, the capacitor C can be used as a filter to filter out low frequency signals and pass high frequency signals. It should be noted that the present application is not limited to the structure shown in FIG. 4 , which is only used to illustrate one of the implementations of the present application.

As can be seen from the implementation manner of the present case described above, the application of the present case has the following advantages. The inductance device shown in the embodiment of this case can sense the high-frequency signal of the central inductance, such as the second-order harmonic, and amplify it in an additional circuit to cancel the adverse effect of the original circuit's second-order harmonic. For example, the switch of the inductance device is mainly used to pass the high frequency and block the low frequency. In this way, the same inductance device can have two different signal induction methods for high and low frequencies. Furthermore, since the filter (such as capacitor C) is set in the integrated circuit (integrated circuit, IC) in this case, there is no need to set the filter outside the inductance device, so as to avoid the external filter from affecting the performance of the circuit itself and its additional cost.

1000, 1000A: inductance device 1100, 1100A: the first wiring 1110, 1110A, 1120, 1120A: sub wiring 1111: the first line 1113: Second line 1121: The third line 1123: The fourth line 1200, 1200A: the second wiring 1210, 1210A, 1220, 1220A: sub wiring 1300, 1300A, 1400, 1500: connectors 1900: partial structure C: Capacitance SW1, SW2, SW3: switch N1~N5: nodes

In order to make the above and other purposes, features, advantages and embodiments of this case more obvious and understandable, the accompanying drawings are explained as follows: FIG. 1 is a schematic diagram illustrating an inductance device according to an embodiment of the present invention. FIG. 2 is a partial structural schematic diagram of an inductance device as shown in FIG. 1 according to an embodiment of the present application. FIG. 3 is a schematic diagram illustrating an inductance device according to an embodiment of the present invention. FIG. 4 is a partial structural schematic diagram of an inductance device as shown in FIG. 3 according to an embodiment of the present application. In accordance with common practice, the various features and elements in the drawings are not drawn to scale, but are drawn in a manner to best present specific features and elements relevant to the case. In addition, the same or similar reference numerals refer to similar elements/components in different drawings.

Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none

1000: inductive device

1100: the first line

1110, 1120: sub wiring

1200: Second trace

1210, 1220: sub wiring

1300: connector

1900: partial structure

SW1: switch

N1: the first node

N2: second node

Claims (10)

An inductive device comprising: A first trace, including: A first sub-trace, including a first line and a second line, wherein the lengths of the first line and the second line are not equal; a first switch for switching the first sub-wire to the first line or switching the first sub-wire to the second line; and a second sub-wire, coupled with one end of the first sub-wire to a first node; A second trace, including: a third sub-trace; and a fourth sub-wire, coupled with one end of the third sub-wire to a second node; and A second switch is coupled between the first node and the second node. The inductance device as described in claim 1, wherein the first circuit includes a plurality of first coils, the second circuit includes a second coil, and the first switch is used to switch the first sub-wire to the first coils A coil or switch the first sub-wire to the second coil, wherein the first coils are located on a first layer and the second coil is located on a second layer. The inductive device as described in claim 2, wherein the second sub-wire includes a third wire and a fourth wire, wherein the length of the third wire and the fourth wire are not equal, and wherein the second wire includes : a third switch, for switching the second sub-wire to the third line or switching the second sub-wire to the fourth line; Wherein the third circuit includes a plurality of third coils, the fourth circuit includes a fourth coil, wherein the third switch is used to switch the second sub-wire to the third coils or switch the second sub-wire to the fourth coil, wherein the third coils are located on the first layer and the fourth coil is located on the second layer. The inductive device according to claim 3, wherein the fourth coil partially overlaps the third coils, wherein the fourth coil partially overlaps the first coils. The inductive device as claimed in claim 4, wherein the second coil does not overlap with the first coils and the third coils, wherein the first coils and the third coils are arranged alternately. The inductive device as described in claim 1, wherein the first sub-wiring includes: a first end; and a second end; Among them, the second sub-route includes: a first end; and a second end coupled to the first node with the second end of the first sub-wire; Wherein the third sub-trace includes: a first end; and a second end; Among them, the fourth sub-route includes: a first end; and A second end coupled to the second node with the second end of the third sub-wire. The inductive device according to claim 6, wherein the first sub-wire and the second sub-wire are arranged on a first side of the inductive device, and the third sub-wire and the fourth sub-wire are arranged On a second side of the inductive device, wherein the first side and the second side are located on opposite sides of the inductive device. The inductance device as described in Claim 7 further includes: A first connector, comprising: a first terminal coupled to the first line and the second line; and A second terminal is coupled to the first sub-wire, wherein the first connecting element is located on the second layer. The inductance device as described in Claim 8 further includes: A second connector, comprising: a first end, coupled to the third line and the fourth line at the same point; and A second terminal is coupled to the second sub-wire, wherein the second connecting element is located on the second layer. The inductance device as described in Claim 9 further includes: A capacitor is coupled between the first node and the second node, wherein the capacitor is connected in parallel with the second switch.

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