CN112637089A

CN112637089A - Switch

Info

Publication number: CN112637089A
Application number: CN202011448220.2A
Authority: CN
Inventors: 卓美娟
Original assignee: Ruijie Networks Co Ltd
Current assignee: Ruijie Networks Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-04-09
Anticipated expiration: 2040-12-09
Also published as: CN112637089B

Abstract

The invention discloses a switch, which is used for solving the technical problem of larger volume of the existing switch. The arrangement mode of the network transformer in the embodiment of the invention can be as follows: an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module is located and a second plane where each RJ45 port included in the RJ45 network port module is located is larger than 0 degree; or, at least two network transformers in the network transformer module are arranged into at least two rows, a first plane where a primary coil of each network transformer is located is parallel to a second plane where each RJ45 port included in the RJ45 network port module is located, and a projection of any first network transformer in a direction perpendicular to the second plane is partially overlapped with a second network transformer adjacent to the first network transformer in the direction perpendicular to the second plane, so that the space occupied by at least two network transformers can be reduced, the size of the switch can be reduced, the manufacturing cost of the switch is reduced, and the user experience is improved.

Description

Switch

Technical Field

The invention relates to the technical field of electronic communication, in particular to a switch.

Background

A switch is a network device for electrical signal forwarding that provides an exclusive electrical signal path for any two network nodes accessing the switch. The switch usually includes a crystal plug (RJ45) port, a network transformer, a Physical Layer (PHY) chip, and the like, where the RJ45 port is a main port for signal transmission, and a network transformer is usually disposed between the RJ45 port and the PHY chip, the network transformer is also called a network isolation transformer, an ethernet transformer, and a network filter, and the network transformer mainly has functions of signal transmission, impedance matching, waveform restoration, signal noise suppression, and high-voltage isolation.

At least two network transformers are usually arranged in the switch, each network transformer comprises at least one group of isolation coils corresponding to RJ45 ports, one end where a primary coil is located in the isolation coil of each network transformer is connected with one corresponding RJ45 port, and the other end where a secondary coil is located in the isolation coil of each network transformer is connected with the PHY chip. Fig. 1 is a schematic structural diagram of a switch provided in the prior art, and as shown in fig. 1, at least two network transformers are usually arranged in a row in the prior art, and for each network transformer, a first plane where primary coils of the network transformers are located is parallel to a second plane where each RJ45 port included in the switch is located.

Therefore, a technical solution that can reduce the space occupied by at least two network transformers to reduce the size of the switch is needed.

Disclosure of Invention

The embodiment of the invention provides a switch, which is used for solving the technical problem of larger volume of the existing switch.

The present invention provides a switch, comprising: the system comprises a physical layer (PHY) chip, a network transformer module and a crystal plug RJ45 network port module, wherein the RJ45 network port module comprises an RJ45 port; the network transformer module comprises at least two network transformers, and each network transformer comprises at least one group of isolation coils;

an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module is located and a second plane where each RJ45 port included in the RJ45 network port module is located is greater than 0 degree; or the like, or, alternatively,

at least two network transformers in the network transformer module are arranged into at least two rows, a first plane where a primary coil of each network transformer is located is parallel to a second plane where each RJ45 port included in the RJ45 network port module is located, and a projection of any first network transformer in a direction perpendicular to the second plane is partially overlapped with a second network transformer adjacent to the first network transformer in the direction perpendicular to the second plane;

the number of the isolation coils included in the network transformer module is the same as that of RJ45 ports included in the RJ45 network port module, one end where a primary coil is located in the isolation coil of each network transformer is connected with one corresponding RJ45 port, and the other end where a secondary coil is located in the isolation coil of each network transformer is connected with the PHY chip.

Further, the switch further comprises: and at least one high-voltage capacitor is connected with at least two network transformers, wherein at least two network transformers connected with the same high-voltage capacitor share one filter circuit Bob Smith circuit.

Further, if an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module is located and a second plane where each RJ45 port included in the RJ45 network port module is located is greater than 0 degree, the network transformer module includes at least three network transformers, a plane where a primary coil of a third network transformer and a plane where a primary coil of a fourth network transformer are located in the at least three network transformers are both perpendicular to the second plane where each RJ45 port included in the RJ45 network port module is located, and a plane where a primary coil of a fifth network transformer in the at least three network transformers is located is parallel to the second plane where each RJ45 port included in the RJ45 network port module is located.

Further, the third network transformer and the fourth network transformer are disposed near the RJ45 network port module, and the fifth network transformer is disposed near the PHY chip.

Further, the third network transformer, the fourth network transformer and the fifth network transformer are connected to the same high voltage capacitor.

Further, the primary taps of each isolation coil included in the third network transformer, the fourth network transformer and the fifth network transformer are connected to the same high-voltage capacitor after being respectively connected to the corresponding capacitor and the corresponding resistor.

Further, connection signal lines between the third network transformer, the fourth network transformer and the fifth network transformer and corresponding RJ45 ports are arranged in a cavity structure formed by the third network transformer, the fourth network transformer and the fifth network transformer; and the connection signal lines among the third network transformer, the fourth network transformer, the fifth network transformer and the PHY chip are arranged at the outer sides of the third network transformer, the fourth network transformer and the fifth network transformer far away from the cavity structure.

Further, if an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module is located and a second plane where each RJ45 port included in the RJ45 network port module is located is greater than 0 degree, the network transformer module includes at least three network transformers, and a sixth network transformer, a seventh network transformer and an eighth network transformer of the at least three network transformers are connected end to form a triangular arrangement.

Further, if an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module is located and a second plane where each RJ45 port included in the RJ45 network port module is located is greater than 0 degree, the network transformer module includes at least two network transformers, and a plane where a primary coil of a ninth network transformer and a plane where a primary coil of a tenth network transformer of the at least two network transformers are located are perpendicular to the second plane where each RJ45 port included in the RJ45 network port module is located.

Further, each network transformer comprises two groups of isolation coils.

The arrangement mode of the network transformers in the embodiment of the invention can be as follows: an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module is located and a second plane where each RJ45 port included in the RJ45 network port module is located is larger than 0 degree; or at least two network transformers in the network transformer module are arranged into at least two rows, a first plane where a primary coil of each network transformer is located is parallel to a second plane where each RJ45 port included in the RJ45 network port module is located, and a projection of any first network transformer in a direction perpendicular to the second plane is partially overlapped with a second network transformer adjacent to the first network transformer in the direction perpendicular to the second plane. Compared with the existing arrangement mode that at least two network transformers are arranged in a row, and for each network transformer, a first plane where primary coils of the network transformers are located is parallel to a second plane where each RJ45 port included in the RJ45 network port module is located, the network transformer network interface module has the advantages that the occupied space of the at least two network transformers can be reduced, the size of the switch can be reduced, the manufacturing cost of the switch is reduced, and meanwhile, user experience is improved.

Drawings

Fig. 1 is a schematic structural diagram of a switch provided in the prior art;

fig. 2 is a schematic structural diagram of a first switch according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second switch according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a third switch according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fourth switch according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a fifth switch according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a first PCB board according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a sixth switch according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a second PCB board provided in the embodiment of the present invention;

fig. 10 is a schematic structural diagram of a seventh switch according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a power supply line pair and a filter capacitor according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an eighth switch according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a ninth switch according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a tenth switch according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of an eleventh switch according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of a twelfth switch according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to reduce the size of the switch, the embodiment of the invention provides the switch.

Example 1:

fig. 2 is a schematic structural diagram of a first switch according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of a second switch according to an embodiment of the present invention, as shown in fig. 2 and fig. 3, the switch includes: the system comprises a physical layer PHY chip 21, a network transformer module 22 and a crystal plug RJ45 network port module 23, wherein the RJ45 network port module 23 comprises an RJ45 port; the network transformer module 22 comprises at least two network transformers, each network transformer comprising at least one set of isolation coils;

an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port included in the RJ45 network port module 23 is located is greater than 0 degree; or the like, or, alternatively,

at least two network transformers in the network transformer module 22 are arranged in at least two rows, a first plane where a primary coil of each network transformer is located is parallel to a second plane where each RJ45 port included in the RJ45 network port module 23 is located, and a projection of any one first network transformer in a direction perpendicular to the second plane is partially overlapped with an adjacent second network transformer in the direction perpendicular to the second plane;

the number of the isolation coils included in the network transformer module 22 is the same as the number of the RJ45 ports included in the RJ45 network port module 23, one end where a primary coil is located in the isolation coil of each network transformer is connected with one corresponding RJ45 port, and the other end where a secondary coil is located in the isolation coil of each network transformer is connected with the PHY chip.

The switch provided in the embodiment of the present invention may be a local area network switch, a wide area network switch, or the like, and may be flexibly selected according to a requirement, which is not specifically limited in the embodiment of the present invention.

The switch may include a Physical Layer (PHY) chip 21, a network transformer module 22, and a crystal plug (RJ45) port module 23, where in general, the RJ45 port module 23 includes at least one RJ45 port, and the number and arrangement of RJ45 ports in the RJ45 port module 23 are not specifically limited in the embodiment of the present invention, and may be flexibly set according to requirements. The network transformer module 22 includes at least two network transformers, and each network transformer includes at least one set of isolation coils corresponding to one RJ45 port, that is, the isolation coils in the network transformer correspond to the RJ45 ports one to one. The embodiment of the invention does not specifically limit the specific model of the network transformer, for example, the network transformer can be an HST-48035DAR double-port POE network transformer and the like, and can be flexibly selected according to requirements.

In order to make the space occupied by the arrangement of at least two network transformers in the network transformer module 22 smaller, the embodiment of the present invention provides two different network transformer arrangement manners, which are described below.

The first arrangement is as follows: in order to reduce the space occupied by the arrangement of the at least two network transformers, an included angle formed by a first plane where the primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port included in the RJ45 network port module 23 is located is greater than 0 degree. Illustratively, as shown in FIG. 2: the angle formed by the first plane where the primary coil of at least one network transformer in the network transformer module 22 is located and the second plane where each RJ45 port included in the RJ45 network port module 23 is located is 90 degrees. In the embodiment of the present invention, if not specifically stated, the left-right direction shown in the drawing is a direction parallel to the second plane where each RJ45 port included in the RJ45 network port module 23 is located, and the up-down direction shown in the drawing is a direction perpendicular to the second plane where each RJ45 port included in the RJ45 network port module 23 is located.

For convenience of understanding, in the embodiment of the present invention, when a first plane on which the primary coil of the network transformer is located is parallel to a second plane on which each RJ45 port included in the RJ45 port module 23 is located, the discharging mode of the network transformer is referred to as lateral discharging; when a first plane on which primary coils of the network transformer are located is perpendicular to a second plane on which each RJ45 port included in the RJ45 network port module 23 is located, the discharge mode of the network transformer is referred to as vertical discharge.

The second arrangement is as follows: as shown in fig. 3: in order to reduce the space occupied by the arrangement of at least two network transformers, at least two network transformers in the network transformer module 22 are arranged in at least two rows, a first plane where primary coils of each network transformer are located is parallel to a second plane where each RJ45 port included in the RJ45 network port module 23 is located, that is, each network transformer is laterally arranged, and at least two network transformers in the network transformer module 22 are arranged in at least two rows, wherein a projection of any one first network transformer in the network transformer module 22 in a direction perpendicular to the second plane partially overlaps with an adjacent second network transformer in a direction perpendicular to the second plane. Illustratively, in fig. 3, the projection of the leftmost (left and right as shown) network transformers of the row of network transformer modules 22 near the PHY chip 21 in a direction perpendicular to the second plane partially overlaps the leftmost (left and right as shown) network transformers of the row near the RJ45 module.

Typically, each network transformer includes at least one set of isolation windings corresponding to one RJ45 port, and the isolation windings are in one-to-one correspondence with RJ45 ports. In the embodiment of the present invention, the number of isolation coils included in the network transformer module 22 is the same as the number of RJ45 ports included in the RJ45 network port module 23, one end where a primary coil in the isolation coil of each network transformer is located is connected to one corresponding RJ45 port, and the other end where a secondary coil in the isolation coil of each network transformer is located is connected to the PHY chip 21. Specifically, the specific connection manner between the isolation coil of the network transformer and the RJ45 port and the PHY chip 21 may be implemented by using the prior art, and is not described herein again.

Example 2:

in order to further reduce the size and manufacturing cost of the switch, on the basis of the above embodiment, in an embodiment of the present invention, the switch further includes: and at least one high-voltage capacitor is connected with at least two network transformers, wherein at least two network transformers connected with the same high-voltage capacitor share one filter circuit Bob Smith circuit.

Electromagnetic Compatibility (EMC) refers to the ability of a device or system to perform satisfactorily in its Electromagnetic environment and not to generate intolerable Electromagnetic interference with any device in its environment. EMC testing, which refers to the comprehensive evaluation of the Electromagnetic Interference (EMI) and the anti-Interference capability (EMS) of electronic products, is one of the most important indicators of product quality, and aims to detect the influence of Electromagnetic radiation generated by electrical products such as switches on human bodies, public power grids and other electrical products which normally work.

Taking a switch as an example, in order to ensure that the switch passes an EMC test, a filter circuit, i.e., a Bob Smith circuit, is usually disposed in a primary circuit connected between a network transformer in the switch and an RJ45 port, and the Bob Smith circuit is used to improve an impedance matching termination processing manner of the EMC, effectively filter out common mode interference, and reduce EMI radiation of about 10 DB.

Referring to fig. 1, in the prior art, at least two network transformers are arranged in a row, and for each network transformer, a first plane where primary coils of the network transformers are located is parallel to a second plane where each RJ45 port included in the switch is located, and generally, each network transformer corresponds to one Bob Smith circuit, and this arrangement not only makes the switch bulky, but also increases the manufacturing cost.

In order to reduce the size of the switch and reduce the cost, the embodiment of the invention can also comprise at least one high-voltage capacitor on the premise of ensuring that the switch can pass the EMC test, wherein the at least one high-voltage capacitor is connected with at least two network transformers, and the at least two network transformers connected with the same high-voltage capacitor share one Bob Smith circuit, so that the size of the switch can be reduced and the cost can be reduced on the premise of ensuring that the switch can pass the EMC test.

Example 3:

in order to reduce the size of the switch, on the basis of the above embodiments, in the embodiment of the present invention, if an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port included in the RJ45 network port module 23 is located is greater than 0 degree, and the network transformer module 22 includes at least three network transformers, the plane of the primary coil of the third network transformer and the plane of the primary coil of the fourth network transformer of the at least three network transformers are both perpendicular to the second plane of each RJ45 port included in the RJ45 network port module 23, a plane on which primary coils of a fifth network transformer of the at least three network transformers are located is parallel to a second plane on which each RJ45 port included in the RJ45 port module 23 is located.

If at least two network transformers in the network transformer module 22 are arranged in the first arrangement manner, that is, an included angle formed between a first plane where a primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port included in the RJ45 network port module 23 included in the RJ45 network port module 23 is located is greater than 0 degree, when the network transformer module 22 includes at least three network transformers, the arrangement manner of the network transformers included in the network transformer module 22 is as follows.

Fig. 4 is a schematic structural diagram of a third switch according to an embodiment of the present invention, and fig. 5 is a schematic structural diagram of a fourth switch according to an embodiment of the present invention, as shown in fig. 4 and fig. 5, a plane in which primary coils of a third network transformer and a plane in which primary coils of a fourth network transformer of the at least three network transformers are located are perpendicular to a second plane in which each RJ45 port included in the RJ45 network port module 23 is located, and meanwhile, a plane in which primary coils of a fifth network transformer of the at least three network transformers are located is parallel to a second plane in which each RJ45 port included in the RJ45 network port module 23 is located.

Specifically, referring to fig. 4, the network transformers in the network transformer module 22 may be arranged in such a manner that the third network transformer and the fourth network transformer are disposed near the RJ45 network port module 23, and the fifth network transformer is disposed near the PHY chip 21, that is, the network transformers in the network transformer module 22 are arranged in a pi shape.

Referring to fig. 5, the network transformers in the network transformer module 22 may also be arranged in a manner that a third network transformer and a fourth network transformer are disposed near the PHY chip 21, and a fifth network transformer is disposed near the RJ45 network port module 23, that is, arranged in an inverted pi shape.

In order to reduce the size of the switch, on the basis of the above embodiments, in an embodiment of the present invention, each network transformer includes two sets of the isolation coils.

In one possible embodiment, for each network transformer in the network transformer module 22, the network transformer includes two sets of isolation coils corresponding to one RJ45 port, and each set of isolation coils is connected to one RJ45 port in a one-to-one relationship, that is, the network transformer is a dual-port network transformer. Compared with a four-port network transformer, the double-port network transformer can further reduce the size of the exchanger.

In order to reduce the size of the switch, on the basis of the above embodiments, in an embodiment of the present invention, the third network transformer, the fourth network transformer, and the fifth network transformer are connected to the same high-voltage capacitor.

For convenience of understanding, the switch provided by the embodiment of the present invention is described below by using a specific embodiment. The structure of the switch provided in the embodiment of the present invention is described by taking an example that each network transformer in the network transformer module 22 is a dual-port network transformer, and at least three network transformers included in the network transformer module 22 are arranged in a pi-shaped arrangement.

Fig. 6 is a schematic structural diagram of a fifth switch according to an embodiment of the present invention, as shown in fig. 6: the third network transformer, the fourth network transformer and the fifth network transformer included in the network transformer module 22 are all connected with the same high-voltage capacitor, and the third network transformer, the fourth network transformer and the fifth network transformer share one Bob Smith circuit. For convenience of understanding, the switch provided in the embodiment of the present invention is explained below with reference to a Printed Circuit Board (PCB) diagram, and fig. 7 is a schematic diagram of a first PCB provided in the embodiment of the present invention, as shown in fig. 7, a third network transformer, a fourth network transformer, and a fifth network transformer are respectively connected to corresponding impedance matching resistors (75ohm resistors) and then connected to the same high-voltage capacitor, so as to form a Bob Smith Circuit.

In order to facilitate the arrangement of the connection signal lines between the network transformers and the RJ45 ports and between the network transformers and the PHY chip 21, on the basis of the foregoing embodiments, in an embodiment of the present invention, the connection signal lines between the third network transformer, the fourth network transformer, and the fifth network transformer and the corresponding RJ45 ports are arranged in a cavity structure formed by the third network transformer, the fourth network transformer, and the fifth network transformer; and the connection signal lines among the third network transformer, the fourth network transformer, the fifth network transformer and the PHY chip are arranged at the outer sides of the third network transformer, the fourth network transformer and the fifth network transformer far away from the cavity structure.

The connection between the network transformer and the RJ45 port is typically referred to as the primary circuit and the connection between the network transformer and the PHY chip 21 is referred to as the secondary circuit. In one possible embodiment, the connection signal lines between the third, fourth and fifth network transformers and the corresponding RJ45 ports, i.e. the connection signal lines of the primary circuit, may be arranged in a cavity structure formed by the third, fourth and fifth network transformers; the connection signal lines between the third, fourth and fifth network transformers and the PHY chip 21, i.e., the secondary circuit connection signal lines, may be disposed outside the third, fourth and fifth network transformers away from the cavity structure.

For convenience of understanding, fig. 8 is a schematic structural diagram of a sixth switch provided in the embodiment of the present invention, and fig. 9 is a schematic structural diagram of a second PCB provided in the embodiment of the present invention, as shown in fig. 8 and fig. 9: wiring areas of connecting signal lines among the third network transformer, the fourth network transformer and the fifth network transformer and corresponding RJ45 ports, namely, a primary circuit wiring area is positioned in a cavity structure formed by the third network transformer, the fourth network transformer and the fifth network transformer; the wiring areas of the connection signal lines between the third network transformer, the fourth network transformer, the fifth network transformer and the PHY chip 21, that is, the wiring areas of the secondary circuits, are located outside the cavity structure formed by the third network transformer, the fourth network transformer and the fifth network transformer.

In order to enable a third network transformer, a fourth network transformer and a fifth network transformer to share one Bob Smith circuit, on the basis of the foregoing embodiments, in an embodiment of the present invention, primary taps of each isolation coil included in the third network transformer, the fourth network transformer and the fifth network transformer are respectively connected to a corresponding capacitor and a corresponding resistor, and then connected to the same high-voltage capacitor.

Taking the third network transformer as an example of a dual port network transformer, fig. 10 is a schematic structural diagram of a seventh switch according to an embodiment of the present invention, as shown in fig. 10, one end of a first isolation coil of the third network transformer includes P1A + and P1A —; P1B +, P1B-; P1C +, P1C-; P1D +, P1D-the four pairs of primary differential line pairs (primary MDI line in the primary circuit), for a total of 8 primary differential lines. Similarly, one end of the second isolation coil of the third network transformer comprises P2A + and P2A-; P2B +, P2B-; P2C +, P2C-; and P2D +, P2D-the four pairs of primary differential line pairs (primary MDI lines), for a total of 8 primary differential lines. Each RJ45 port includes eight RJ45 port pins of 1, 2 … … 8, respectively. I.e. each set of coils comprises the same number of primary differential lines as the number of RJ45 port pins comprised by the corresponding RJ45 port, each primary differential line being connected to one corresponding RJ45 port pin.

In addition, the third network transformer, the fourth network transformer and the fifth network transformer share one Bob Smith circuit, which is formed as shown in fig. 10, for example, the third network transformer, the primary tap of the first isolation coil and the primary tap of the second isolation coil in the third network transformer are connected to a high-voltage capacitor C0 after connecting corresponding capacitors and corresponding resistors, wherein the capacitors may be dc blocking capacitors C1, C2, C3, C4 or C5 at the primary coil side of the network transformer, and the capacitors C1, C2, C3, C4 and C5 may be respectively connected to the primary taps P1-MCT, P2-MCT, NEG2, NEG1 and a power supply line POE-54V; the resistance may be an impedance matching resistance (75ohm resistance) R1, R2, R3, R4, or R5. The embodiment of the invention does not specifically limit the specific types and parameters of the tap blocking capacitor at the primary coil side of the network transformer and the impedance matching resistor, and can be flexibly selected according to requirements, for example, the tap blocking capacitor at the primary coil side of the network transformer can be a 0603 + 103J 50V capacitor, the error range of the impedance matching resistor can be +/-1%, the resistance value of the resistor is 75ohm, the 0603 packaging resistor and the like.

Accordingly, the primary tap of the third isolation winding and the primary tap of the fourth isolation winding in the fourth network transformer are also connected to the high-voltage capacitor C0 after connecting the corresponding capacitor and resistor (not shown). Similarly, after the primary tap of the fifth isolation coil and the primary tap of the sixth isolation coil in the fifth network transformer are connected with corresponding capacitors and resistors (not shown), the fifth network transformer and the sixth isolation coil are also connected with a high-voltage capacitor C0, so that the third network transformer, the fourth network transformer and the fifth network transformer share one Bob Smith circuit. In addition, one end of the high-voltage capacitor C0 is connected to the third, fourth and fifth network transformers, and the other end of the high-voltage capacitor C0 is connected to a Protection Ground (PGND). The embodiment of the invention does not specifically limit the specific model and parameters of the high-voltage capacitor, and can be flexibly set according to requirements. In one possible implementation, to reduce the switch area and cost, the high-voltage capacitor of 12061 nf can be selected, and specifically, the high-voltage capacitor of 1206-.

In addition, the other ends of the first isolation coils of the third network transformer include P1A + ', P1A-'; P1B + ', P1B-'; P1C + ', P1C-'; the four pairs of secondary differential line pairs (secondary MDI lines in the secondary circuit) P1D + ', P1D-' total 8 secondary differential lines. Likewise, the other ends of the second isolation windings of the third network transformer comprise P2A + ', P2A-'; P2B + ', P2B-'; P2C + ', P2C-'; P2D '+, P2D' -the four pairs of secondary differential line pairs (secondary MDI lines), for a total of 8 secondary differential lines. Each secondary differential line is connected with a corresponding resistor, namely a secondary MDI series resistor R6, R7 and R8 … … R21, one end of the secondary MDI series resistor is connected with the secondary differential line, the other end of the secondary MDI series resistor is connected with the PHY chip 21, and the secondary MDI series resistor is mainly used for lightning protection. The specific model and parameters of the secondary MDI series resistor can be flexibly set according to requirements, for example, the error range of the resistor can be +/-1%, the resistance value of the resistor is 1ohm, the resistor is packaged in 0402 and the like.

In addition, the secondary MDI line center taps of the third network transformer are connected to the corresponding secondary tap capacitors C6, C7, C8 … … C27, C28, and C29, one ends of the secondary tap capacitors are connected to the corresponding secondary MDI line center taps, and the other ends of the secondary tap capacitors are connected to the wire Ground (GND) of the PCB. The specific model and parameters of the secondary tap capacitor can be flexibly set according to requirements, and the embodiment of the invention is not particularly limited to this.

In a possible embodiment, the switch may be a Power Over Ethernet (POE) switch, and POE (Power Over Ethernet) refers to a technology that can provide dc Power for some IP-based terminals (such as IP phones, wireless lan access points AP, webcams, etc.) while transmitting data signals for such devices, without any modification to the existing Ethernet cat.5 wiring infrastructure, and is a switch that supports Power Over Ethernet.

The POE switch includes a power supply line pair POE-54V and POE-54VGND, fig. 11 is a schematic diagram illustrating connection between the power supply line pair and a filter capacitor provided in the embodiment of the present invention, as shown in fig. 11, the power supply line pair is disposed close to the RJ45 gateway module 23, and the power supply line pair is respectively connected to a corresponding filter capacitor C30, C31, and C32 … … C37, and in addition, a backup filter capacitor C38, C39, and C40 … … C43 may also be preset, and in a possible implementation, the power supply line pair may also be connected to a corresponding backup filter capacitor C38, C39, and C40 … … C43. The specific model and parameters of the filter capacitor and the specific model and parameters of the spare filter capacitor are not specifically limited, and can be flexibly set according to requirements, for example, the filter capacitor can be a capacitor packaged in 102/2KV 1206, and the spare filter capacitor can be a capacitor of 1812/10nf/2KV, and the like.

Fig. 12 is a schematic structural diagram of an eighth switch according to an embodiment of the present invention, and as shown in fig. 12, the pair of power supply lines POE-54V and POE-54VGND are respectively connected to the corresponding diodes D1, D2, D3 … … D12, one end of each diode is connected to the corresponding power supply line, and the other end of each diode is connected to the corresponding primary tap NEG1, NEG2, NEG3 … … NEG6 of the network transformer. The type of the diode can be flexibly set according to requirements, and for example, the type of the diode can be M7_ FM 4007.

In addition, the power supply line pair POE-54V and POE-54VGND are respectively connected with corresponding piezoresistors RV1 and RV2 … … RV6, one end of each piezoresistor is connected with the power supply line pair, and the other end of each piezoresistor is connected with PGND.

One end of a center tap of a non-power supply wire pair of the switch is connected with piezoresistors RV7, RV8, … … and RV12, the other end of the center tap is connected with PGND, one end of each piezoresistor is connected with the center tap of the non-power supply wire pair, and the other end of each piezoresistor is connected with primary taps P1_ MCT, P2_ MCT, P3_ MCT and … … P6_ MCT. The diode and the piezoresistor arranged in the switch are mainly used for forming a surge protection circuit and playing a role in preventing lightning for a power supply circuit in the switch. The specific model and parameters of the piezoresistor can be flexibly selected according to requirements, for example, the piezoresistors of 361KD14J, 360V and 4.5KA can be selected for RV1, RV2 and RV 3; RV4, RV5 and RV6 can adopt voltage dependent resistors of 431KD14J, 430V and 4.5 KA; RV7 and RV8 … … RV12 can be selected from 361KD10J piezoresistors and the like.

Fig. 13 is a schematic structural diagram of a ninth switch according to an embodiment of the present invention, and as shown in fig. 13, a surge protection circuit and a filter circuit, that is, a Bob Smith circuit, are provided in the switch, and the surge protection circuit and the filter circuit are combined to protect electronic components in the switch from being damaged and to perform better filtering on noise, so that the switch is guaranteed to operate safely and quality of an electrical signal is also guaranteed.

In a possible implementation, to reduce the cost, the PCB board of the switch may be a four-layer board including, from TOP to BOTTOM, a TOP layer (TOP layer), a reference layer (GND layer), a power layer (power layer), and a BOTTOM layer (BOTTOM layer), respectively. Wherein the TOP layer and the BOTTOM layer are layers in which signal lines are mainly arranged. In addition, in order to prevent signal crosstalk, the primary MDI signal lines at the top layer and the bottom layer need to be crossed and routed when the primary MDI signal lines are routed, and long-distance overlapping routing is avoided.

When the secondary MDI circuit is wired, the reference layer corresponding to the secondary MDI signal line is complete, the reference layer can isolate the signal lines of the top layer and the bottom layer, and when the secondary MDI signal line is wired, the secondary MDI signal lines of the top layer and the bottom layer can be wired without staggering, and the wiring is only required to pay attention to the ground.

In a possible implementation manner, fig. 14 is a schematic structural diagram of a tenth switch according to an embodiment of the present invention, as shown in fig. 14, the switch may include at least one PHY chip 21, and in order to prevent a filter loop from being formed, two screws may be disposed around the at least one PHY chip 21, one end of the two screws is connected to the PCB, and the other end of the two screws is connected to a switch housing (not shown), so that noise can be safely flowed into the ground. In addition, the connection mode between the PHY chip 21 and the network transformer port in the network transformer module 22 may adopt the prior art, which is not specifically limited in this embodiment of the present invention.

Example 4:

in order to reduce the size of the switch, on the basis of the above embodiments, in the embodiment of the present invention, if an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port included in the RJ45 network port module 23 is located is greater than 0 degree, and the network transformer module 22 includes at least three network transformers, a sixth network transformer, a seventh network transformer, and an eighth network transformer of the at least three network transformers are connected end to form a triangular arrangement.

Fig. 15 is a schematic structural diagram of an eleventh switch according to an embodiment of the present invention, as shown in fig. 15, if the network transformer module 22 includes at least two network transformers in the first arrangement, that is, an included angle formed between a first plane where a primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port in the RJ45 network port module 23 included in the RJ45 network port module 23 is located is greater than 0 degree, and the network transformer module 22 includes at least three network transformers, a sixth network transformer, a seventh network transformer, and an eighth network transformer of the at least three network transformers may also be arranged in a triangle shape by joining end to end, compared with the prior art that the sixth network transformer, the seventh network transformer, and the eighth network transformer are arranged in a row, and for each network transformer, the arrangement mode that the first plane that the primary coil of this network transformer belongs to is parallel with the second plane that every RJ45 port that includes in RJ45 net gape module 23 belongs to can reduce the space that the network transformer occupies to can reduce the switch volume, also improve user experience when reducing switch manufacturing cost.

In a possible embodiment, in order to reduce the switch area and cost, the sixth network transformer, the seventh network transformer and the eighth network transformer may be connected to the same high-voltage capacitor, i.e., share one Bob Smith circuit. The manner in which the sixth network transformer, the seventh network transformer, and the eighth network transformer are connected to the same high-voltage capacitor may be the same as in the above embodiments, and details are not repeated herein.

Example 5:

in order to reduce the size of the switch, on the basis of the above embodiments, in the embodiment of the present invention, if an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port included in the RJ45 network port module 23 is located is greater than 0 degree, and the network transformer module 22 includes at least two network transformers, a plane where a primary coil of a ninth network transformer of the at least two network transformers is located and a plane where a primary coil of a tenth network transformer is located are both perpendicular to the second plane where each RJ45 port included in the RJ45 network port module 23 is located.

Fig. 16 is a schematic structural diagram of a twelfth switch according to an embodiment of the present invention, as shown in fig. 16, if the network transformers adopt the first arrangement, that is, an included angle formed by a first plane where a primary coil of at least one network transformer in the network transformer module 22 is located and a second plane where each RJ45 port included in the RJ45 network port module 23 included in the RJ45 network port module 23 is located is greater than 0 degree, and when at least two network transformers are included in the network transformer module 22, a plane where a primary coil of a ninth network transformer and a plane where a primary coil of a tenth network transformer of the at least two network transformers are located are both perpendicular to a second plane where each RJ45 port included in the RJ45 network port module 23 is located, that is, that the ninth network transformer and the tenth network transformer are both vertically arranged, compared to the ninth network transformer and the tenth network transformer being arranged in a row, and for each network transformer, the arrangement mode that the first plane where the primary coil of the network transformer is located is parallel to the second plane where each RJ45 port included in the RJ45 network port module 23 is located.

In one possible embodiment, to reduce the switch area and cost, the ninth network transformer and the tenth network transformer may be connected to the same high-voltage capacitor, i.e., share one Bob Smith circuit. The connection modes of the ninth network transformer, the tenth network transformer and the same high-voltage capacitor can be flexibly set according to requirements, and the embodiment of the invention is not particularly limited to this.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A switch, characterized in that the switch comprises: the system comprises a physical layer (PHY) chip, a network transformer module and a crystal plug RJ45 network port module, wherein the RJ45 network port module comprises an RJ45 port; the network transformer module comprises at least two network transformers, and each network transformer comprises at least one group of isolation coils;

2. The switch of claim 1, further comprising: and at least one high-voltage capacitor is connected with at least two network transformers, wherein at least two network transformers connected with the same high-voltage capacitor share one filter circuit Bob Smith circuit.

3. The switch of claim 1, wherein if an included angle formed by a first plane on which a primary coil of at least one network transformer in the network transformer module is located and a second plane on which each RJ45 port included in the RJ45 network port module is located is greater than 0 degree, and the network transformer module includes at least three network transformers, a plane on which a primary coil of a third network transformer and a plane on which a primary coil of a fourth network transformer are located in the at least three network transformers are perpendicular to the second plane on which each RJ45 port included in the RJ45 network port module is located, a plane on which a primary coil of a fifth network transformer in the at least three network transformers is located is parallel to the second plane on which each RJ45 port included in the RJ45 network port module is located.

4. The switch of claim 3, wherein the third network transformer and the fourth network transformer are disposed proximate to the RJ45 portal module and the fifth network transformer is disposed proximate to the PHY chip.

5. The switch of claim 3, wherein the third network transformer, the fourth network transformer, and the fifth network transformer are connected to the same high voltage capacitor.

6. The switch of claim 5, wherein the primary taps of each isolation coil included in the third, fourth, and fifth network transformers are connected to the same high voltage capacitor after connecting to a corresponding capacitor and a corresponding resistor, respectively.

7. The switch of claim 5, wherein connection signal lines between the third, fourth, and fifth network transformers and corresponding RJ45 ports are disposed within a cavity structure formed by the third, fourth, and fifth network transformers; and the connection signal lines among the third network transformer, the fourth network transformer, the fifth network transformer and the PHY chip are arranged at the outer sides of the third network transformer, the fourth network transformer and the fifth network transformer far away from the cavity structure.

8. The switch of claim 1, wherein if an included angle formed by a first plane on which a primary coil of at least one network transformer in the network transformer module is located and a second plane on which each RJ45 port included in the RJ45 port module is located is greater than 0 degrees, and the network transformer module includes at least three network transformers, a sixth network transformer, a seventh network transformer, and an eighth network transformer of the at least three network transformers are connected end to end in a triangular arrangement.

9. The switch of claim 1, wherein if an included angle formed by a first plane on which a primary coil of at least one network transformer in the network transformer module is located and a second plane on which each RJ45 port included in the RJ45 network port module is located is greater than 0 degree, and the network transformer module includes at least two network transformers, a plane on which a primary coil of a ninth network transformer and a plane on which a primary coil of a tenth network transformer are located in the at least two network transformers are perpendicular to the second plane on which each RJ45 port included in the RJ45 network port module is located.

10. A switch according to any of claims 1-9, characterized in that each of said network transformers comprises two respective sets of said isolating coils.