EP0902443A2 - Planar coupled coil arrangement - Google Patents

Abstract

A planar coupled coils arrangement including a first coil (S1), in which a first conductor path section of the first coil (S1) is arranged in a first plane, and in which a conductor path section completing the first coil (S1) is arranged in a second plane, and is electrically connected by one or more connections to the first conductor path section. A second coil (S2) is used and its conductor path is completely or partly arranged in the second plane, and if the conductor path of the second coil (S2) is arranged partly in the second plane the part of the conductor path completing the second coil (S2) is arranged in the first or a third plane, and is electrically connected by one or more connections to the first conductor path section of the second coil (S2). Both coils (S1,S2) are arranged symmetrically to one another and the conductor paths of the coils are mutually arranged so that coupling takes place between the coils (S1,S2).

Description

The invention relates to a planar, coupled coil arrangement, which, for example, in an oscillator or Bandpass can be used. For example, it can also as a transformer, as an impedance converter, for coupling amplifier stages or serve for galvanic isolation.

A coil (induction coil) is a component that is electromagnetic Can store energy. The coil is made by constructive Coil data such as length, diameter, shape, number of turns, Core material and core shape specified.

So far, single or multi-layer cylindrical or ring coils uses a special ferromagnetic core in Can get rod, ring or shell shape.

However, these coils have the disadvantage that they are not or cannot be easily integrated into a chip. In addition they require a lot of space and are difficult to manufacture and represent an additional component, which is specifically must be assembled and checked.

An object of the invention is a planar, coupled Specify coil arrangement in which the disadvantages of the state of technology can be avoided.

The task is accomplished through a planar, coupled coil arrangement solved according to claim 1.

The planar, coupled coil arrangement according to the invention has a first coil in which a first conductor track portion the first coil is arranged in a first plane and the portion of the conductor track that completes the first coil is arranged in a second level and by an or several connections with the first conductor part electrically connected is. In addition, a second coil is provided in which the conductor track is completely or partially in the second Level is arranged at which if the second coil for Part is arranged in the second plane, which is the second coil complete part of the trace in the first or arranged on a third level and by one or more Connections to the first conductor part of the second coil is electrically connected. The coils are symmetrical to each other arranged and the conductor tracks of the coils to each other arranged that a coupling takes place between the coils.

Advantageous further developments result from the dependent ones Claims.

So a third coil can be provided, in which the conductor track arranged entirely or in part on the third level and, if the conductor path of the third coil to Part is arranged in the third level, which is the third coil complete part of the trace in the first or the second level and is arranged by one or more Connections to the first conductor part of the third coil is electrically connected.

Furthermore, the coil connection conductor tracks for tapping the coil have through one or more connections electrically connected to the conductor track of the corresponding coil are.

The coils can be round. This has the advantage that an optimal coupling between the coils can be achieved can.

The coils can also be made square. This has the The advantage of being easy to manufacture.

The coils are advantageously around a circuit arranged. This saves space.

There is also the possibility of the conductor tracks of the coils predominantly to be arranged one above the other.

The planar, coupled coil arrangement according to the invention is advantageously in an oscillator, in a bandpass, as Transformer, as an impedance converter, for coupling amplifier stages or usable for galvanic isolation.

Figur 1 zeigt eine erste Ausführungsform der erfindungsgemäßen Spulenanordnung mit einer ersten Ausführungsform der Widerstandsbeschaltung.

Figur 2 zeigt die erste Ausführungsform der erfindungsgemäßen Spulenanordnung mit einer zweiten Ausführungsform der Widerstandsbeschaltung.

Figur 3 zeigt eine erste Ebene einer zweiten Ausführungsform der erfindungsgemäßen Spulenanordnung.

Figur 4 zeigt die zweite Ebene der zweiten Ausführungsform der erfindungsgemäßen Spulenanordnung.

Figur 5 zeigt die dritte Ebene der zweiten Ausführungsform der erfindungsgemäßen Spulenanordnung.

Figur 6 zeigt eine dritte Ausführungsform der erfindungsgemäßen Spulenanordnung in der Draufsicht.

Figur 7 zeigt die dritte Ausführungsform der erfindungsgemäßen Spulenanordnung in einer dreidimensionalen Ansicht.

Figur 8 zeigt eine vierte Ausführungsform der erfindungsgemäßen Spulenanordnung in einer dreidimensionalen Ansicht.

Figur 9 zeigt eine fünfte Ausführungsform der erfindungsgemäßen Spulenanordnung in einer dreidimensionalen Ansicht.

Figur 10 zeigt eine sechste Ausführungsform der erfindungsgemäßen Spulenanordnung in einer dreidimensionalen Ansicht.

The invention is explained in more detail below with reference to 10 figures.

Figure 1 shows a first embodiment of the coil arrangement according to the invention with a first embodiment of the resistor circuit.

Figure 2 shows the first embodiment of the coil arrangement according to the invention with a second embodiment of the resistor circuit.

FIG. 3 shows a first level of a second embodiment of the coil arrangement according to the invention.

FIG. 4 shows the second level of the second embodiment of the coil arrangement according to the invention.

FIG. 5 shows the third level of the second embodiment of the coil arrangement according to the invention.

Figure 6 shows a third embodiment of the coil arrangement according to the invention in plan view.

FIG. 7 shows the third embodiment of the coil arrangement according to the invention in a three-dimensional view.

FIG. 8 shows a fourth embodiment of the coil arrangement according to the invention in a three-dimensional view.

FIG. 9 shows a fifth embodiment of the coil arrangement according to the invention in a three-dimensional view.

FIG. 10 shows a sixth embodiment of the coil arrangement according to the invention in a three-dimensional view.

In the first embodiment of the coil arrangement shown in FIG. 1 there are two coils S1 and S2, which over a resistor R1 is connected to a conductor track L1, which, for example, can have a reference potential. The black areas of the coils S1 and S2 yourself in a first level. The connections V1 and V2 (gray drawn) are on a second level and connect the conductor track ends A, B and A ', B' with each other. The Connections between the first level and the second level at points A, B, A 'and B' can, for example, by Vias are made. The coil connections of the coils S1 and S2 are labeled A1, A2 and A3.

The angular coil arrangement shown in FIG. 1 is also round realizable.

Instead of a common connection as shown in FIG. 1 A3 for the coils S1 and S2 can also have separate connections A3 and A4 for the coils S1 and S2 according to FIG. 2 be provided. The coils S1 and S2 are across the resistors R2 or R3 connected to the resistor R1.

Instead of the resistors R1, R2 and R3, others can also Circuit elements are connected to the coils S1 and S2.

In Figure 3 is the lowest level (Alu1), which is the substrate comes closest, shown. Above that is the figure 4 shown second level (Alu2) and above that again top level shown in Figure 5 (Alu3). As in the figures 1 and 2 can be the conductor track L1 with which the coils S1 and S2 are connected to a reference potential. The coils S1 and S2 according to FIGS. 4 and 5 have two connections A1 and A2, as well as a common connection A3. As already mentioned, as shown in FIGS. 4 and 5, the conductor track L1 can be connected to the connection A3. This is however not absolutely necessary. The A3 connection can also be connected to a circuit element. The conductor track ends A '' '', B '' '', and A '' ', B' '' in Figure 4 over a conductor track section, which is between the points A '' '', B '' '' or A '' ', B' '' according to Figure 5, and corresponding vias connected together. Likewise, the points A '', B '' and A, B in Figure 5 with the between the points A ″, B ″ or A, B according to FIG Conductor tracks and corresponding vias connected. The connecting element V, which is also a Represents conductor path and between the points A ', B' in Figure 4 is used to bridge the conductor track in Figure 3 runs between points A 'and B'. The conductor track V is part of the coils S3 and S4 according to FIG. 3. The coils S3 and S4 have a common connection A6, as well as a connection A5 or A4. Within this A circuit can be provided for coils. First, this has the advantage that space can be saved and secondly that to get from the circuit to terminals A4 and A5 no additional bridges to bridge the conductor tracks the coils S3 and S4 are necessary.

The coupling takes place in the respective one between the coils S1 and S2 Level. A coupling between the coils S1 and S2 with the coils S3 and S4, however, takes place across the planes.

In the third embodiment of the coil arrangement shown in FIG. 6 the two coils S1 and S2 are predominantly on top of each other. While the coil S1 is mainly in the is on the first level, the coil S2 is predominantly on the second level. The first level is gray, the second Drawn level black. The coil S1 has the connections A1 and A2 on. The connections A3 and A4 belong to the coil S2.

In Figure 7, the coils S1 and S2 are in three-dimensional view shown. The coil S2 is located directly below the coil S1. At points A and B of coil S1 there are connections provided in the second level (drawn in black), to bridge the gap between points A and B in the first level conductor track of the first coil S1 to serve. With coil S2 there is a connection in the first level provided between points A 'and B' to bridge the conductor track running between points A 'and B' serves on the second level. The connections are with corresponding plated-through holes with the respective conductor tracks of the coils connected. The coupling of the coils S1 and S2 takes place across the two levels. As from the 6 can be seen, the coils S1 and S2 symmetrical to each other.

In addition to the embodiment shown in Figure 7 the fourth embodiment of the coil arrangement shown in FIG a further coil S3, which is in a third Level. The coil S3 has the connections A5 and A6 on. The coil S3 is also transverse to the levels 1, 2 and 3 coupled to the coils S1 and S2. The coils S1 and S2 represent bifilar coils.

For example, as shown in FIG. 9, coil taps can be executed. For this purpose, connecting conductor tracks C, D and E are provided with the corresponding connections A7, A8 and A9. While the turns of the coils are on the top Level (drawn in gray) are the connecting conductor tracks C, D and E and the connections between points A, B and A ', B' provided on the lower level (drawn in black). The coupling takes place here within the level.

This takes place in the embodiment shown in FIG Coupling between the coils S1 (shown in gray) and S2 or the coils S3 (shown in gray) and S2 vertically, d. H. across to the levels (drawn in black) while coupling between the coils S1 and S3 in the plane. The coil S1 has the connections A1 and A2, the coil S2 the connections A3, A7 and A4, and the coil S3 the connections A5 and A6 The connection A7 provides a center tap of the coil S2 represents the connection between points A and B of the coil S2 is provided on a third level.

Basically, all embodiments of the invention Coil arrangement both angular and round executable.

The coil arrangement according to the invention is also optimized in that that the number of layers of metallization required are minimized in the integrated circuit.

Claims (8)

Planar, coupled coil arrangement, with a first coil (S1), in which a first conductor track part of the first coil (S1) is arranged in a first plane, in which a conductor track part completing the first coil (S1) is arranged in a second plane and is electrically connected to the first conductor track part by one or more connections, with a second coil (S2), in which the conductor track is arranged entirely or in part on the second level, in which, if the conductor track of the second coil (S2) is arranged in part in the second level, the part of the conductor track which completes the second coil (S2) is arranged in the first or a third level and by one or more connections to the first Conductor part of the second coil (S2) is electrically connected,
the coils (S1, S2) being arranged symmetrically to one another,
the conductor tracks of the coils (S1, S2) being arranged in relation to one another in such a way that a coupling between the coils (S1, S2) takes place. Coil arrangement according to claim 1, with a third coil (S3), in which the conductor track is arranged completely or partially in the third level, in which, if the third coil (S3) is arranged partly in the third level, the part of the conductor track which completes the conductor track of the third coil (S3) is arranged in the first or second plane and by one or more connections to the first conductor track part the third coil (S3) is electrically connected. Coil arrangement according to one of claims 1 or 2, are provided in the connecting conductor tracks (C, D, E) for tapping the coil, which are electrically connected to the conductor track of the corresponding coil by one or more connections. Coil arrangement according to one of claims 1 to 3, where the coils (S1, S2, S3) are round. Coil arrangement according to one of claims 1 to 3, where the coils (S1, S2, S3) are angular. Coil arrangement according to one of claims 1 to 5, in which the coils are arranged around a circuit. Coil arrangement according to one of claims 1 to 6, in which the conductor tracks of the coils are mainly arranged one above the other. Use of the coil arrangement according to one of claims 1 to 7, in an oscillator, in a bandpass, as a transformer, as an impedance converter, for coupling amplifier stages or for electrical isolation.

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