Circuit board and electronic equipment

Abstract

The utility model relates to the technical field of electronic equipment, and discloses a circuit board and electronic equipment, the circuit board is provided with a differential signal hole group, and the hole group comprises a first signal hole pair and a second signal hole pair; wherein the two signal holes in the first signal hole pair are symmetrical about the first symmetry axis and located on different sides of the first symmetry axis, the first symmetry axis sequentially passes through the circle centers of the two signal holes in the second signal hole pair, and the first signal hole pair and the second signal hole pair are located on different sides of the first reference straight line respectively. The first reference straight line is perpendicular to the first symmetry axis. According to the circuit board and the electronic equipment provided by the invention, the crosstalk phenomenon between the differential hole pairs can be weakened, and the signal quality and the signal integrity are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a circuit board and electronic equipment. Background Art

[0002] Each update and iteration of consumer electronics products will develop towards high integration, miniaturization, high performance and high reliability.

[0003] In electronic products, such as high-depth-ratio via interconnect boards, package substrates, low-order high-speed PCBs (Printed Circuit Boards), and high-speed connectors, it is difficult to effectively isolate differential via pairs within a limited layout space. In particular, differential via pairs in PCBs are prone to crosstalk, which can affect the signal quality and signal integrity of electronic products. Utility Model Content

[0004] In view of this, the present application provides a circuit board and an electronic device, which can reduce the crosstalk phenomenon between differential hole pairs and ensure signal quality and signal integrity.

[0005] Specifically, this application includes the following technical solutions:

[0006] A first aspect of the present application provides a circuit board, wherein a differential signal hole group is provided on the circuit board, wherein the hole group includes a first signal hole pair and a second signal hole pair;

[0007] The two signal holes in the first signal hole pair are symmetrical about a first symmetry axis and are located on different sides of the first symmetry axis. The first symmetry axis passes through the centers of the two signal holes in the second signal hole pair in sequence. The first signal hole pair and the second signal hole pair are respectively located on different sides of a first reference straight line, and the first reference straight line is perpendicular to the first symmetry axis.

[0008] In one implementation of this application, the hole group further includes a third signal hole pair;

[0009] The third signal hole pair is located on a side of the second signal hole pair away from the first signal hole pair, and two signal holes in the third signal hole pair are symmetrical about the first symmetry axis and are located on different sides of the first symmetry axis.

[0010] In one implementation of this application, the hole group further includes a fourth signal hole pair;

[0011] The two signal holes in the fourth signal hole pair are symmetrical about the second axis of symmetry and are located on different sides of the second axis of symmetry. The second axis of symmetry passes through the centers of the two signal holes in the third signal hole pair in sequence. The fourth signal hole pair and the third signal hole pair are located on different sides of the second reference line, which is perpendicular to the second axis of symmetry.

[0012] In one implementation of this application, the hole group further includes a fifth signal hole pair;

[0013] The two signal holes in the fifth signal hole pair are symmetrical about the second axis of symmetry and located on different sides of the second axis of symmetry, and the fifth signal hole pair and the fourth signal hole pair are respectively located on opposite sides of the third signal hole pair; or,

[0014] The two signal holes in the fifth signal hole pair are symmetrical about the third axis of symmetry and are located on different sides of the third axis of symmetry. The third axis of symmetry passes through the centers of the two signal holes in the first signal hole pair in sequence, and the fifth signal hole pair and the fourth signal hole pair are located on different sides of the first axis of symmetry, respectively.

[0015] In one implementation of this application, a first ground hole is provided between the second signal hole pair and the first signal hole pair, and a second ground hole is provided between the second signal hole pair and the third signal hole pair. The first axis of symmetry passes through the center of the first ground hole and the center of the second ground hole in sequence.

[0016] The first distance between at least one of the fourth signal hole pair and the fifth signal hole pair and the two sides of the first signal hole pair that are close to each other is greater than the second distance between the two sides of the first ground hole and the second ground hole that are far apart from each other. The first distance and the second distance are distances along the direction of the first axis of symmetry.

[0017] In one implementation of this application, the distance between any signal hole pair in the hole group and the two adjacent signal hole pairs is equal, wherein the two adjacent signal hole pairs are symmetrical about a straight line passing through the center of the two signal holes in the signal hole pair.

[0018] In an implementation of the embodiment of the present application, at least one ground hole is further provided on the circuit board, and each of the ground holes is located between any two adjacent pairs of signal holes in the hole group.

[0019] In one implementation of this application, in each pair of adjacent signal holes corresponding to a ground hole, the axis of symmetry of the two signal holes in one of the signal hole pairs passes through the center of the ground hole.

[0020] In one implementation of this application, for a pair of signal holes whose centers are collinear with the center of the ground hole, the center-to-center distance between the two signal holes in the pair is less than the center-to-center distance from the first ground hole to any one of the signal holes in the pair.

[0021] A second aspect of this application provides an electronic device, characterized in that the electronic device includes the circuit board described above.

[0022] The beneficial effects of the technical solutions provided by the embodiments of the present application include at least:

[0023] In the circuit board and electronic device provided in this application embodiment, since the two signal holes in the first signal hole pair are symmetrical about the first axis of symmetry and are located on different sides of the first axis of symmetry, and the first axis of symmetry passes through the center of the two signal holes in the second signal hole pair in sequence, the distance between the two signal holes in the first signal hole pair and the same signal hole in the second signal hole pair is equal. Therefore, the magnetic field strength of the two signal holes in the second signal hole pair, which are differential signal holes, is approximately equal at any signal hole in the first signal hole pair, but their directions are opposite. Thus, the two interfering magnetic fields generated by the two signal holes in the second signal hole pair with opposite directions will cancel each other out at the first signal hole pair, thereby reducing the crosstalk between the second and first signal hole pairs. There is no need to increase the distance between the signal hole pairs to reduce crosstalk, reducing the arrangement space of the signal hole pairs and meeting the high integration and miniaturization requirements of circuit boards and electronic devices. Furthermore, the centers of the two signal holes in the second signal hole pair pass through the first axis of symmetry of the two signal holes in the first signal hole pair. That is, the two interfering magnetic fields emitted by the two signal holes in the second signal hole pair are also symmetrical about the first axis of symmetry. This avoids uneven magnetic field distribution after the two interfering magnetic fields cancel each other out at the first signal hole pair, which would lead to signal transmission distortion. This further reduces the crosstalk phenomenon and ensures the signal quality and signal integrity of the circuit board. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of the first type of circuit board provided in this application embodiment is shown;

[0026] Figure 2 A schematic diagram of the structure of the second type of circuit board provided in an embodiment of this application is shown;

[0027] Figure 3 A schematic structural diagram of a third circuit board provided in an embodiment of the present application is shown;

[0028] Figure 4 A schematic structural diagram of a fourth circuit board provided in an embodiment of the present application is shown;

[0029] Figure 5 A schematic structural diagram of a fifth circuit board provided in an embodiment of the present application is shown;

[0030] Figure 6 A schematic structural diagram of a sixth circuit board provided in an embodiment of the present application is shown;

[0031] Figure 7 A structural schematic diagram of the seventh circuit board provided in an embodiment of the present application is shown. Description of the drawings:

[0033] 100. Circuit board;

[0034] 1. First signal hole pair; 11. First symmetry axis; 12. First reference straight line;

[0035] 2. Second signal hole pair;

[0036] 3. The third signal hole pair; 31. The second reference straight line;

[0037] 4. Fourth signal hole pair; 41. Second axis of symmetry;

[0038] 5. Fifth signal hole pair; 51. Third axis of symmetry;

[0039] 6. Ground hole; 61. First ground hole; 62. Second ground hole; 63. Third ground hole; 64. Fourth ground hole.

[0040] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. To make the technical solutions and advantages of this application clearer, the circuit board and electronic equipment will be described in detail below with reference to the accompanying drawings.

[0042] In electronic products, such as high-aspect-ratio via interconnect boards, package substrates, low-order high-speed PCBs (Printed Circuit Boards), and high-speed connectors, it is difficult to effectively isolate differential via pairs within a limited layout space. In particular, crosstalk is prone to occur between differential via pairs in PCBs, which can affect the signal quality and signal integrity of electronic products.

[0043] In related art, PCBs typically minimize crosstalk by increasing the distance between differential via pairs. However, this arrangement increases the space required to arrange the differential via pairs, making it difficult to meet the high integration and miniaturization requirements of electronic devices.

[0044] In response, this application provides a circuit board 100, such as Figure 1 As shown, the circuit board 100 has a differential signal via group, which may include a first signal via pair 1 and a second signal via pair 2. That is, the two signal vias in the first signal via pair 1 are differential signal vias, and the two signal vias in the second signal via pair 2 are also differential signal vias. Furthermore, it is understood that the two signal vias in any of the following signal via pairs (including the third signal via pair 3, the fourth signal via pair 4, and the fifth signal via pair 5) included in the differential signal via group are also differential signal vias. The two signals transmitted by the two signal vias in a differential signal via pair have equal amplitudes and opposite polarities.

[0045] The two signal holes in the first signal hole pair 1 are symmetrical about the first symmetry axis 11 and are located on different sides of the first symmetry axis 11. The first symmetry axis 11 passes through the centers of the two signal holes in the second signal hole pair 2 in sequence. Figure 1 It can be seen that the arrangement direction of the two signal holes in the first signal hole pair 1 is perpendicular to the arrangement direction of the two signal holes in the second signal hole pair 2. In addition, the first signal hole pair 1 and the second signal hole pair 2 are located on different sides of the first reference straight line 12, and the first reference straight line 12 is perpendicular to the first symmetry axis 11. Figure 1 It can be seen that the area where the two signal holes in the first signal hole pair 1 are located does not overlap with the rectangular area where the two signal holes in the second signal hole pair 2 are located. For example, the long side of the rectangular area corresponding to any signal hole pair can be the distance between the two side edges of the two signal holes in the signal hole pair that are away from each other, and the long side of the rectangular area can be the diameter of the signal hole.

[0046] In the circuit board 100 provided in the embodiments of this application, since the two signal holes in the first signal hole pair 1 are symmetrical about the first axis of symmetry 11 and are located on different sides of the first axis of symmetry 11, and the first axis of symmetry 11 passes through the center of the two signal holes in the second signal hole pair 2 in sequence, the distance between the two signal holes in the first signal hole pair 1 and the same signal hole in the second signal hole pair 2 is equal. Therefore, the magnetic field strength of the two signal holes in the second signal hole pair 2, which are differential signal holes, is approximately equal at any signal hole in the first signal hole pair 1, but their directions are opposite. Thus, the two interfering magnetic fields generated by the two signal holes in the second signal hole pair 2, which have opposite directions, will cancel each other out at the first signal hole pair 1, thereby reducing the crosstalk between the second signal hole pair 2 and the first signal hole pair 1. There is no need to reduce crosstalk by increasing the distance between the signal hole pairs, reducing the arrangement space of the signal hole pairs and meeting the high integration and miniaturization requirements of the circuit board 100 and electronic devices. Furthermore, the centers of the two signal holes in the second signal hole pair 2 pass through the first axis of symmetry 11 of the two signal holes in the first signal hole pair 1. That is, the two interfering magnetic fields emitted by the two signal holes in the second signal hole pair 2 are also symmetrical about the first axis of symmetry 11. This avoids uneven magnetic field distribution after the two interfering magnetic fields cancel each other out at the first signal hole pair 1, which would lead to signal transmission distortion. This further reduces the crosstalk phenomenon and ensures the signal quality and signal integrity of the circuit board 100.

[0047] It should also be noted that, Figure 1 The two signal holes in the first signal hole pair 1 and the two signal holes in the second signal hole pair 2 are not distinguished. If the two signal holes in the differential hole pair are distinguished according to the polarity of the transmitted signal, one is hole A and the other is hole B, it can be divided into the following two cases.

[0048] In one example, such as Figure 1 As shown, holes A and B in the first signal hole pair 1 are located on both sides of the first axis of symmetry 11, and hole A in the second signal hole pair 2 is set closer to the first signal hole pair 1 than hole B.

[0049] In another example, holes A and B in the first signal hole pair 1 are located on opposite sides of the first axis of symmetry 11, and hole B in the second signal hole pair 2 is positioned closer to the first signal hole pair 1 than hole A.

[0050] The positions of holes A and B in the first signal hole pair 1 and the second signal hole pair 2 can be interchanged, with roughly the same effect in reducing crosstalk between the signal hole pairs. Therefore, those skilled in the art can select and adjust the positions of holes A and B in the first and second signal holes according to the actual situation.

[0051] When the distance between signal aperture pairs is close, although the magnetic field of the second signal aperture pair 2 can cancel out some of the interference, a relatively serious crosstalk phenomenon will still occur. Therefore, in some embodiments, such as Figure 1 As shown, there is a gap between the first signal aperture pair 1 and the second signal aperture pair 2. Exemplarily, the distance between the edges of the first signal aperture pair 1 and the second signal aperture pair 2 that are close to each other along the axial direction of the first axis of symmetry 11 can be greater than the diameter of the signal aperture to obtain a better crosstalk reduction effect.

[0052] Those skilled in the art can select and adjust the spacing between the first signal hole pair 1 and the second signal hole pair 2 according to actual needs.

[0053] It should also be noted that, Figure 1 The signal aperture pair is drawn with a rectangular frame outside. This rectangular frame does not represent a rectangular solid structure outside the signal aperture pair, but rather indicates that the two signal apertures inside the rectangular frame are a pair of differential signal apertures.

[0054] In one implementation of the embodiments of this application, such as Figure 2 As shown, the hole group may also include a third signal hole pair 3; the third signal hole pair 3 is located on the side of the second signal hole pair 2 away from the first signal hole pair 1, and the two signal holes in the third signal hole pair 3 are symmetrical about the first axis of symmetry 11 and are located on different sides of the first axis of symmetry 11.

[0055] To save space for the arrangement of signal hole pairs and improve the space utilization of the circuit board 100, in the circuit board 100 provided in this application embodiment, a third signal hole pair 3 can also be arranged on the side of the second signal hole pair 2 away from the first signal hole pair 1. The two interference magnetic fields generated by the two signal holes in the second signal hole pair 2 with opposite directions can also cancel each other at the third signal hole pair 3, which weakens the crosstalk phenomenon between the second signal hole pair 2 and the third signal hole pair 3. It is equivalent to the two first signal hole pairs 1 jointly weakening the crosstalk phenomenon through a second signal hole pair 2, and also saving the arrangement space of the signal hole pairs.

[0056] In some embodiments, as Figure 2 As shown, there is a gap between the first signal hole pair 1 and the second signal hole pair 2, and there is also a gap between the second signal hole pair 2 and the third signal hole pair 3. The gap distances between the second signal hole pair 2 and the first signal hole pair 1 and the third signal hole pair 3 are equal. That is, the third signal hole pair 3 and the first signal hole pair 1 are mirror symmetrical about the central axis of the two signal holes in the second signal hole pair 2. This makes the crosstalk between the first signal hole pair 1 and the second signal hole pair 2 about the same as the crosstalk between the third signal hole pair 3 and the second signal hole pair 2, ensuring that the signal quality of the transmitted signal is consistent for different signal holes.

[0057] In one implementation of the embodiment of the present application, Figure 3 As shown, the hole group also includes a fourth signal hole pair 4; the two signal holes in the fourth signal hole pair 4 are symmetrical about the second axis of symmetry 41 and are located on different sides of the second axis of symmetry 41. The second axis of symmetry 41 passes through the centers of the two signal holes in the third signal hole pair 3 in sequence, and the fourth signal hole pair 4 and the third signal hole pair 3 are located on different sides of the second reference line 31, which is perpendicular to the second axis of symmetry 41.

[0058] In order to save space for the arrangement of signal hole pairs and improve the space utilization of the circuit board 100, a fourth signal hole pair 4 can be provided on one side of the third signal hole pair 3 in the circuit board 100 provided in this application embodiment. This increases the number of signal hole pairs while reducing the crosstalk between the third signal hole pair 3 and the fourth signal hole pair 4.

[0059] In one implementation of the embodiment of the present application, Figure 4 As shown, the hole group also includes a fifth signal hole pair 5; the two signal holes in the fifth signal hole pair 5 are symmetrical about the second symmetry axis 41 and are located on different sides of the second symmetry axis 41, and the fifth signal hole pair 5 and the fourth signal hole pair 4 are respectively located on opposite sides of the third signal hole pair 3.

[0060] In the circuit board 100 provided in this application embodiment, a fifth signal hole pair 5 can also be arranged on the side of the third signal hole pair 3 away from the fourth signal hole pair 4. The two interference magnetic fields generated by the two signal holes in the third signal hole pair 3 with opposite directions can also cancel each other at the fifth signal hole pair 5, which weakens the crosstalk phenomenon between the third signal hole pair 3 and the fifth signal hole pair 5. Thus, a third signal hole pair 3 can maintain a low crosstalk effect on its adjacent fourth signal hole pair 4 and fifth signal hole pair 5, and saves the arrangement space of the signal hole pairs.

[0061] Since the first signal hole pair 1 and the third signal hole pair 3 are arranged on both sides of the second signal hole pair 2, the influence of the first signal hole pair 1 and the third signal hole pair 3 on the second signal hole pair 2 can be substantially equivalent. Therefore, the positions of the first signal hole pair 1 and the third signal hole pair 3 can be interchanged. Thus, the fourth signal hole pair 4 and the fifth signal hole pair 5 can also be arranged on opposite sides of the first signal hole pair 1.

[0062] For example, Figure 5 As shown, the hole group also includes a fourth signal hole pair 4; the two signal holes in the fourth signal hole pair 4 are symmetrical about the third axis of symmetry 51 and are located on different sides of the third axis of symmetry 51. The third axis of symmetry 51 passes through the centers of the two signal holes in the first signal hole pair 1 in sequence, and the fourth signal hole pair 4 and the first signal hole pair 1 are located on different sides of the second reference line 31, which is perpendicular to the third axis of symmetry 51.

[0063] In order to save space for arranging signal hole pairs and improve the space utilization of the circuit board 100, a fourth signal hole pair 4 can be provided on one side of the first signal hole pair 1 in the circuit board 100 provided in this application embodiment. This increases the number of signal hole pairs while reducing the crosstalk between the first signal hole pair 1 and the fourth signal hole pair 4.

[0064] In some embodiments, as Figure 5 As shown, the hole group may also include a fifth signal hole pair 5; the two signal holes in the fifth signal hole pair 5 are symmetrical about the third axis of symmetry 51 and are located on different sides of the third axis of symmetry 51, and the fifth signal hole pair 5 and the fourth signal hole pair 4 are located on opposite sides of the first signal hole pair 1 respectively.

[0065] A fifth signal hole pair 5 can also be arranged on the side of the first signal hole pair 1 away from the fourth signal hole pair 4. The two interference magnetic fields generated by the two signal holes in the first signal hole pair 1 with opposite directions can also cancel each other out at the fifth signal hole pair 5, which weakens the crosstalk phenomenon between the first signal hole pair 1 and the fifth signal hole pair 5. It is equivalent to the two fourth signal hole pairs 4 passing through a first signal hole pair 1 to weaken the crosstalk phenomenon, and also saves the arrangement space of the signal hole pairs.

[0066] It is understandable that Figure 5 The layout structure of the differential signal aperture group shown can be derived from... Figure 4 The layout structure of the differential signal hole group shown is obtained by rotating 180° clockwise or counterclockwise.

[0067] Furthermore, in some embodiments, such as Figure 4 and Figure 5 As shown, the five signal hole pairs in the differential signal hole group are symmetrically arranged about the first symmetry axis 11 .

[0068] In some embodiments, as Figure 6 As shown, when the hole group includes a fourth signal hole pair 4 symmetrical about a second axis of symmetry 41, the hole group may also include a fifth signal hole pair 5, in which the two signal holes are symmetrical about a third axis of symmetry 51 and located on different sides of the third axis of symmetry 51, which passes sequentially through the centers of the two signal holes in the first signal hole pair 1, and the fifth signal hole pair 5 and the fourth signal hole pair 4 are located on different sides of the first axis of symmetry 11. Based on Figure 6 It can be seen that the third symmetry axis 51 is parallel to the second symmetry axis 41 .

[0069] In the circuit board 100 provided in the embodiment of the present application, a fifth signal hole pair 5 can be set on one side of the first signal hole pair 1, and a fourth signal hole pair 4 can be set on one side of the third signal hole pair 3, thereby weakening the crosstalk phenomenon between the first signal hole pair 1 and the fifth signal hole pair 5, weakening the crosstalk phenomenon between the third signal hole pair 3 and the fourth signal hole pair 4, increasing the number of signal hole pairs while saving the arrangement space of the signal hole pairs, and improving the space utilization of the circuit board 100.

[0070] It should be noted that Figure 6 Only one scenario is shown. In another example, the two signal holes in the fifth signal hole pair 5 are symmetrical about the second axis of symmetry 41 and located on different sides of the second axis of symmetry 41, and the fifth signal hole pair 5 and the fourth signal hole pair 4 are located on different sides of the first axis of symmetry 11, respectively, and the third axis of symmetry 51 is parallel to the second axis of symmetry 41. This example is similar to... Figure 6 The schemes shown are the same and have the same effect. The only difference is the setting position of the fourth signal hole pair 4 and the fifth signal hole pair 5. This application will not go into too much detail here.

[0071] In one implementation of the embodiment of the present application, Figure 7 As shown, at least one ground hole 6 is also provided on the circuit board 100, and each ground hole 6 is located between any two adjacent signal hole pairs in the hole group.

[0072] In the circuit board 100 provided in the embodiments of this application, such as Figure 7 As shown, the presence of ground via 6 allows the circuit board 100 to be grounded more effectively, guiding the ground current between different conductors to the ground plane more efficiently, thereby reducing electromagnetic interference on the circuit board 100. Furthermore, the ground via 6 can reduce electromagnetic coupling between adjacent signal via pairs, reduce electromagnetic radiation, and thus weaken the impact of crosstalk between signal via pairs.

[0073] In addition, Figure 7 For example, a ground hole 6 is provided between the first signal hole pair 1 and the second signal hole pair 2. The interference magnetic field generated by the second signal hole pair 2 will first be partially reduced by the ground hole 6 before acting on the first signal hole pair 1. The weakened interference magnetic field has a lower impact on the first signal hole pair 1. Therefore, the spacing distance between the first signal hole pair 1 and the second signal can be appropriately shortened, and the precision requirement for the spacing distance between the first signal hole pair 1 and the second signal hole pair 2 can be reduced, reducing the manufacturing difficulty.

[0074] It should be noted that "each ground hole 6 is located between two adjacent pairs of signal holes" means that a ground hole 6 is provided between two adjacent and perpendicular pairs of signal holes. In one example, such as Figure 7As shown, a first ground hole 61 is provided between the first signal hole pair 1 and the second signal hole pair 2, a second ground hole 62 is provided between the second signal hole pair 2 and the third signal hole pair 3, a third ground hole 63 is provided between the third signal hole pair 3 and the fourth signal hole pair 4, and a fourth ground hole 64 is provided between the third signal hole pair 3 and the fifth signal hole pair 5.

[0075] In one implementation of the embodiments of this application, such as Figure 7 As shown, when there is a first ground hole 61 between the second signal hole pair 2 and the first signal hole pair 1, and a second ground hole 62 between the second signal hole pair 2 and the third signal hole pair 3, the first axis of symmetry 11 passes through the center of the first ground hole 61 and the center of the second ground hole 62 in sequence; the first distance between at least one of the fourth signal hole pair 4 and the fifth signal hole pair 5 and the two sides that are close to each other with the first signal hole pair 1 is greater than the second distance between the two sides that are far away from each other with the first ground hole 61 and the second ground hole 62, and the first distance and the second distance are respectively the distance along the direction of the first axis of symmetry 11.

[0076] In the circuit board 100 provided in this application embodiment, the first distance 'a' between the first signal hole pair 1 and the fourth signal hole pair 4 is greater than the second distance 'b'. That is, there is at least a pair of signal holes and the distance between two adjacent ground holes 6 between the signal holes in the first signal hole pair 1 and the signal holes in the fourth signal hole pair 4 that are close to the second signal hole pair 2. This avoids excessive crosstalk when the interval between the first signal hole pair 1 and the fourth signal hole pair 4 is too close. While increasing the number of signal hole pairs and saving arrangement space, the crosstalk between the first signal hole pair 1 and the fourth signal hole pair 4 is taken into account, so that the crosstalk between any pair of signal hole pairs on the circuit board 100 can meet the design requirements. The distance between the first signal hole pair 1 and the fifth signal hole pair 5 is equal to the first distance 'a' and is also greater than the second distance 'b', which will not be described in detail here.

[0077] It should be noted that when the fourth signal hole pair 4 and the fifth signal hole pair 5 are located on either side of the first signal hole pair 1, the distance between the fourth signal hole pair 4 and the third signal hole pair 3 is equal to the first distance a and greater than the second distance b. The same applies to the fifth signal hole pair 5, which will not be elaborated further here.

[0078] In one implementation of the embodiments of this application, such as Figure 7 As shown, the distance between any signal hole pair in the hole group and the two adjacent signal hole pairs is equal, wherein the two adjacent signal hole pairs are symmetrical about the straight line passing through the center of the two signal holes in the signal hole pair.

[0079] It should be noted that two adjacent signal aperture pairs refer to two signal aperture pairs that are adjacent in position and perpendicular to each other. For example, Figure 4The first signal hole pair 1 and the second signal hole pair 2, the second signal hole pair 2 and the third signal hole pair 3, the third signal hole pair 3 and the fourth signal hole pair 4, and the third signal hole pair 3 and the fifth signal hole pair 5.

[0080] In one example, such as Figure 4 As shown, the distance between the first signal hole pair 1 and the second signal hole pair 2, the distance between the second signal hole pair 2 and the third signal hole pair 3, the distance between the third signal hole pair 3 and the fourth signal hole pair 4, and the distance between the third signal hole pair 3 and the fifth signal hole pair 5 are all equal; so that the degree of crosstalk between any pair of adjacent signal hole pairs is roughly the same, ensuring that the signal quality of signals transmitted by different signal hole pairs is consistent.

[0081] In one implementation of the embodiments of this application, such as Figure 7 As shown, the two adjacent signal holes corresponding to each ground hole 6 are aligned, and the symmetry axis of the two signal holes in one signal hole pair passes through the center of the ground hole 6 .

[0082] The centers of the two signal holes in the ground hole 6 and its adjacent signal hole pair are located on the same straight line, so that the interference magnetic field generated by the two signal holes can be symmetrical about the straight line at the ground hole 6. Thus, the ground hole 6 can better reduce the electromagnetic radiation generated by the signal hole pair, thereby weakening the crosstalk phenomenon between the signal hole pair.

[0083] It should be noted that "the two adjacent signal hole pairs corresponding to each ground borehole 6" refers to two signal hole pairs that are adjacent to and perpendicular to each other. Figure 7 For example, the two signal hole pairs corresponding to the first ground hole 61 are the first signal hole pair 1 and the second signal hole pair 2; the two signal hole pairs corresponding to the second ground hole 62 are the second signal hole pair 2 and the third signal hole pair 3; the two signal hole pairs corresponding to the third ground hole 63 are the third signal hole pair 3 and the fourth signal hole pair 4; and the two signal hole pairs corresponding to the fourth ground hole 64 are the third signal hole pair 3 and the fifth signal hole pair 5.

[0084] When the differential signal via and ground via 6 are close together, the electromagnetic coupling effect between them will be enhanced. The stronger electromagnetic coupling effect will cause a common-mode current to appear on ground via 6, which will generate some common-mode interference to the differential signal via.

[0085] Therefore, in one implementation of this application, for a pair of signal holes whose centers are collinear with the center of the ground hole 6, the center-to-center distance between the two signal holes in the pair is less than the center-to-center distance from the first ground hole 61 to any one of the signal holes in the pair.

[0086] The center distance between ground hole 6 and any signal hole in the signal hole pair should be greater than the center distance between the two signal holes in the signal hole pair. This increases the distance between ground hole 6 and the signal hole, avoids common-mode current on ground hole 6, and avoids common-mode interference between ground hole 6 and the signal hole pair.

[0087] For example, such as Figure 7 As shown, the centers of the two signal holes in the second signal hole pair 2 are collinear with the center of the first ground hole 61. The center distance between the first ground hole 61 and the signal hole in the second signal hole pair 2 closest to the first ground hole 61 is c, and the center distance between the two signal holes in the second signal hole pair 2 is d, where c is greater than d. Furthermore, the centers of the two signal holes in the second signal hole pair 2 are also collinear with the center of the second ground hole 62. The center distance between the second ground hole 62 and the signal hole in the second signal hole pair 2 closest to the second ground hole 62 is also c, where c is greater than d. The distances between the remaining ground holes 6 and the signal holes also follow this pattern. For example, the center distance between the third ground hole 63 and the signal hole in the third signal hole pair 3 closest to the third ground hole 63 is also c, and the center distance between the two signal holes in the third signal hole pair 3 is d, where c is greater than d. Further details are omitted here.

[0088] This application also provides an electronic device, characterized in that the electronic device includes the circuit board 100 described above.

[0089] The first signal hole pair 1 and the second signal hole pair 2 are perpendicular to each other. Since both the first signal hole pair 1 and the second signal hole pair 2 are differential signal hole groups, the magnetic field strength of the electromagnetic field at any signal hole in the first signal hole pair 1 is approximately equal and the magnetic field direction is opposite. Therefore, the two signal holes in the second signal hole pair 2 will cancel out the two opposing magnetic field directions of the first signal hole pair 1, thereby reducing the crosstalk phenomenon between the second signal hole pair 2 and the first signal hole pair 1. There is no need to increase the distance between the signal hole pairs to reduce crosstalk, reducing the arrangement space of the signal hole pairs and meeting the high integration and miniaturization requirements of the circuit board 100 and electronic devices. Furthermore, the centers of the two signal holes in the second signal hole pair 2 pass through the first axis of symmetry 11 of the two signal holes in the first signal hole pair 1. That is, the two interfering magnetic fields emitted by the two signal holes in the second signal hole pair 2 are also symmetrical about the first axis of symmetry 11. This avoids the uneven magnetic field distribution caused by the two interfering magnetic fields canceling out at the first signal hole pair 1, which leads to signal transmission distortion. This further reduces the crosstalk phenomenon and ensures the signal quality and signal integrity of the circuit board 100.

[0090] Furthermore, since the electronic device uses the aforementioned circuit board 100, it can save some layout space to install other components, or reduce the overall layout space, resulting in higher integration.

[0091] Optionally, the electronic device in this application embodiment can be any one of a mobile phone, tablet computer, laptop computer, wearable device, etc.

[0092] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0093] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0094] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A circuit board (100), characterized in that: The circuit board (100) is provided with a differential signal hole group, the hole group comprising a first signal hole pair (1) and a second signal hole pair (2); The two signal holes in the first signal hole pair (1) are symmetrical about a first symmetry axis (11) and are located on different sides of the first symmetry axis (11); the first symmetry axis (11) passes through the centers of the two signal holes in the second signal hole pair (2) in sequence; and the first signal hole pair (1) and the second signal hole pair (2) are respectively located on different sides of a first reference straight line (12); and the first reference straight line (12) is perpendicular to the first symmetry axis (11).

2. The circuit board (100) according to claim 1, characterized in that: The hole group also includes a third signal hole pair (3); The third signal hole pair (3) is located on a side of the second signal hole pair (2) away from the first signal hole pair (1), and the two signal holes in the third signal hole pair (3) are symmetrical about the first symmetry axis (11) and are located on different sides of the first symmetry axis (11).

3. The circuit board (100) according to claim 2, characterized in that: The hole group also includes a fourth signal hole pair (4); The two signal holes in the fourth signal hole pair (4) are symmetrical about a second symmetry axis (41) and are located on different sides of the second symmetry axis (41); the second symmetry axis (41) passes through the centers of the two signal holes in the third signal hole pair (3) in sequence; and the fourth signal hole pair (4) and the third signal hole pair (3) are respectively located on different sides of a second reference straight line (31); the second reference straight line (31) is perpendicular to the second symmetry axis (41).

4. The circuit board (100) according to claim 3, characterized in that: The hole group also includes a fifth signal hole pair (5); The two signal holes in the fifth signal hole pair (5) are symmetrical about the second symmetry axis (41) and are located on different sides of the second symmetry axis, and the fifth signal hole pair (5) and the fourth signal hole pair (4) are respectively located on opposite sides of the third signal hole pair (3); or, The two signal holes in the fifth signal hole pair (5) are symmetrical about a third symmetry axis (51) and are located on different sides of the third symmetry axis (51); the third symmetry axis (51) passes through the centers of the two signal holes in the first signal hole pair (1) in sequence; and the fifth signal hole pair (5) and the fourth signal hole pair (4) are respectively located on different sides of the first symmetry axis (11).

5. The circuit board (100) according to claim 4, characterized in that: A first ground hole (61) is provided between the second signal hole pair (2) and the first signal hole pair (1), a second ground hole (62) is provided between the second signal hole pair (2) and the third signal hole pair (3), and the first symmetry axis (11) passes through the center of the first ground hole (61) and the center of the second ground hole (62) in sequence; A first distance between two side edges of at least one of the fourth signal hole pair (4) and the fifth signal hole pair (5) close to the first signal hole pair (1) is greater than a second distance between two side edges of the first ground hole (61) and the second ground hole (62) far away from each other, and the first distance and the second distance are respectively distances along the direction of the first symmetry axis (11).

6. The circuit board (100) according to any one of claims 2 to 5, characterized in that: The distances between any signal hole pair in the hole group and two adjacent signal hole pairs are equal, wherein the two adjacent signal hole pairs are symmetrical about a straight line passing through the centers of the two signal holes in the signal hole pair.

7. The circuit board (100) according to any one of claims 1 to 4, characterized in that: At least one ground hole (6) is also provided on the circuit board (100), and each ground hole (6) is located between any two adjacent pairs of signal holes in the hole group.

8. The circuit board (100) according to claim 7, characterized in that: Two adjacent signal holes corresponding to each of the ground holes (6) are centered, and the symmetry axis of the two signal holes in one of the signal hole pairs passes through the center of the ground hole (6).

9. The circuit board (100) according to claim 7, characterized in that: For a signal hole pair in which the centers of the two signal holes are colinear with the center of the ground hole (6), the center distance between the two signal holes in the signal hole pair (2) is smaller than the center distance from the first ground hole (61) to any one of the signal holes in the signal hole pair (2).

10. An electronic device, characterized in that: The electronic device comprises the circuit board (100) according to any one of claims 1 to 9.

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