Circuit board integrated with isolation transformer and isolation transformer integrated circuit

Abstract

The utility model discloses an isolation transformer integrated circuit board and isolation transformer integrated circuit, including isolation transformer, divider resistance module, internet access module, master control module and physical port layer module, wherein the isolation transformer is connected with the internet access module, the isolation transformer is also connected with divider resistance module; when the isolation transformer is a 100M isolation transformer supporting 10-100Mbps, the divider resistance module is connected with the main control module; when the isolation transformer is a gigabit isolation transformer supporting 10-1000 Mbps, the divider resistance module is connected with one end of the physical port layer module, and the physical port layer module is further connected with the main control module. The isolation transformer arranged on the circuit board can be a 100M isolation transformer or a gigabit isolation transformer, so that the isolation transformer can be arranged on the circuit board according to the needs of customers, and the compatibility of the circuit board is improved. By arranging the configuration detection module, the isolation transformer in the circuit is identified, the rate matching of the network equipment and the transformer is ensured, and the communication quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of isolation transformers, and more particularly to a circuit board and an integrated circuit for an integrated isolation transformer. Background Technology

[0002] With the increasing miniaturization of cloud computing devices, space-saving technologies in PCB (printed circuit board) design have become particularly important. As the cloud computing business rapidly develops, PCBs need to integrate more functions and components within a limited space. Based on cost and customer needs, cloud computing products typically have only one network port. However, with the miniaturization of cloud computing devices, different customers have different requirements for network port configurations.

[0003] Currently, in the design of 100Mbps and 1Gbps networks, one option is to choose either a 100Mbps module or a 1Gbps module, but this cannot meet the needs of different customers at the same time. The option can only be chosen based on the market research and customer demand in the early stage. Another option is to abandon the network port and choose to add a USB to network card cable as an accessory, which greatly increases the product cost. Summary of the Invention

[0004] This utility model provides a circuit board for integrating an isolation transformer and an integrated circuit for the isolation transformer, in order to solve the problem that current circuit boards are not compatible with 100 Mbps and 1 Gbps isolation transformers.

[0005] To achieve the above objectives, in one embodiment, a circuit board with an integrated isolation transformer is provided, including an isolation transformer, a voltage divider resistor module, a network port module, a main control module, and a physical port layer module, wherein one end of the isolation transformer is connected to the network port module, and the other end of the isolation transformer is connected to one end of the voltage divider resistor module;

[0006] When the isolation transformer is a 100Mbps isolation transformer supporting 10-100Mbps, the other end of the voltage divider resistor module is connected to the main control module;

[0007] When the isolation transformer is a gigabit isolation transformer supporting 10-1000Mbps, the other end of the voltage divider resistor module is connected to one end of the physical port layer module, and the other end of the physical port layer is connected to the main control module.

[0008] In one embodiment, the circuit board includes a first circuit board, on which the network port module, isolation transformer, voltage divider resistor module, main control module, physical port layer module, line connecting the network port module to the isolation transformer, and line connecting the isolation transformer to the voltage divider resistor module are disposed;

[0009] When the isolation transformer is the 100M isolation transformer, the first layer circuit board is also provided with a line connecting the voltage divider resistor module and the main control module.

[0010] In one embodiment, the circuit board further includes a second circuit board. When the isolation transformer is the gigabit isolation transformer, the second circuit board is provided with lines connecting the voltage divider resistor module to the physical port layer module and lines connecting the physical port layer module to the main control module.

[0011] In one embodiment, a configuration detection module is further included. This configuration detection module is disposed on the first layer circuit board and connected to the main control module.

[0012] When the isolation transformer is the 100M isolation transformer, the line connecting the configuration detection module and the main control module is set on the first layer circuit board;

[0013] When the isolation transformer is the 100M isolation transformer, the configuration detection module is also connected to the physical port layer module, and the line connecting the configuration detection module and the main control module is set on the second layer circuit board.

[0014] In one embodiment, an isolation transformer integrated circuit is provided, including an isolation transformer, a network port module, a voltage divider resistor module, a main control module, a configuration detection module, and a physical port layer module, wherein one end of the isolation transformer is connected to the network port module, the other end of the isolation transformer is connected to one end of the voltage divider resistor module, and the main control module is connected to the configuration detection module;

[0015] When the isolation transformer is a 100Mbps isolation transformer supporting 10-100Mbps, the other end of the voltage divider resistor module is connected to the main control module;

[0016] When the isolation transformer is a gigabit isolation transformer supporting 10-1000Mbps, the other end of the voltage divider resistor module is connected to one end of the physical port layer module, the other end of the physical port layer module is connected to the main control module, one end of the physical port layer is connected to one end of the configuration detection module, and the other end of the configuration detection module is connected to the main control module.

[0017] In one embodiment, a protection circuit module is also included, which includes a first protection circuit and a second protection circuit. One end of the first protection circuit is connected to one end of the isolation transformer, and the other end of the first protection circuit is grounded.

[0018] When the isolation transformer is the 100M isolation transformer, one end of the second protection circuit is connected to the network port module, and the other end of the second protection circuit is grounded.

[0019] The protection circuit module is used to filter the output signal of the network port module.

[0020] In one embodiment, when the isolation transformer is a gigabit isolation transformer, the integrated circuit further includes a driving circuit and a filtering circuit, wherein one end of the driving circuit is connected to the main control module, the other end of the driving circuit is connected to one end of the gigabit isolation transformer, the other end of the gigabit isolation transformer is connected to the network port module, one end of the filtering circuit is connected to one end of the gigabit isolation transformer, and the other end of the filtering circuit is grounded.

[0021] In one embodiment, the configuration detection module includes: a first resistor, a second resistor, a third resistor, and a first power supply, wherein one end of the first resistor is connected to the main control module, the other end of the first resistor is connected to one end of the second resistor and one end of the third resistor, the other end of the second resistor is grounded, and the other end of the third resistor is connected to the first power supply.

[0022] In one embodiment, when the circuit is configured as the gigabit isolation transformer, the other end of the third resistor is also connected to the physical port layer module.

[0023] In one embodiment, the 100 Mbps isolation transformer is model PSF-1626, and the gigabit isolation transformer is model PSF-2447.

[0024] The aforementioned integrated isolation transformer circuit board and isolation transformer integrated circuit allow for the installation of either a 100Mbps or 1Gbps isolation transformer on the circuit board. This enables the circuit board to be customized to meet customer needs, improving its compatibility. By configuring a detection module to identify the isolation transformer in the circuit, the speed of the network device and the transformer is matched, preventing data packet loss or delays caused by speed inconsistencies and improving communication quality. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic diagram of the circuit board modules integrating the isolation transformer in one embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram showing the connection between the 100M isolation transformer and each module on the circuit board in one embodiment of this utility model;

[0028] Figure 3 This is a schematic diagram showing the connection between the gigabit isolation transformer of the circuit board and each module in one embodiment of this utility model;

[0029] Figure 4 This is a schematic diagram of each module in the isolation transformer integrated circuit in one embodiment of this utility model;

[0030] Figure 5 This is a schematic diagram showing the connection between the 100M isolation transformer and each module in one embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram showing the connection between the gigabit isolation transformer and each module in one embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram showing the connection between the protection circuit module and the isolation transformer in one embodiment of this utility model;

[0033] Figure 8 This is a schematic diagram showing the connection between the drive circuit and the filter circuit and the isolation transformer in one embodiment of this utility model;

[0034] Figure 9 This is a schematic diagram of a configuration detection circuit for a 100 MHz isolation transformer in one embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of a configuration detection module and a physical port layer module for a gigabit isolation transformer in one embodiment of the present invention.

[0036] Reference numerals: 1. Isolation transformer; 2. Configuration detection module; 3. Voltage divider resistor module; 4. Drive circuit; 5. Network port module; 6. Protection circuit module; 601. First protection circuit; 602. Second protection circuit; 7. Main control module; 8. Filtering circuit; 9. Physical port layer module; 11. Circuit board with integrated isolation transformer. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0039] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0040] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0041] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0042] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0043] In one embodiment, such as Figure 1 As shown, a circuit board 11 with an integrated isolation transformer is provided, including an isolation transformer 1, a voltage divider resistor module 3, a network port module 5, a main control module 7, and a physical port layer module 9, wherein one end of the isolation transformer 1 is connected to the network port module 5, and the other end of the isolation transformer 1 is connected to one end of the voltage divider resistor module 3;

[0044] like Figure 2 As shown, when the isolation transformer 1 is a 100Mbps isolation transformer supporting 10-100Mbps, the other end of the voltage divider resistor module 3 is connected to the main control module 7;

[0045] like Figure 3 As shown, when the isolation transformer 1 is a gigabit isolation transformer supporting 10-1000Mbps, the other end of the voltage divider resistor module 3 is connected to one end of the physical port layer module 9, and the other end of the physical port layer 9 is connected to the main control module 7.

[0046] The isolation transformer, with no electrical connection and potential difference between its input and output windings, prevents contact accidents by avoiding contact loops and completely isolates the input and output electrical systems. The voltage divider resistor module adjusts the signal voltage level to meet the processing requirements of subsequent circuits while protecting other components. The network port module enables the circuit board to connect to a local area network (LAN) or a network security network, allowing for network communication with other devices, processing requests from clients, and sending responses. The main control module (CPU) executes stored instructions for computation and coordinates the various modules on the circuit board to achieve overall functionality. The physical port layer module (PHY) performs signal conversion, converting received analog signals into digital signals and amplifying, filtering, encoding, and decoding them for processing by other modules. Furthermore, because the PHY chip supports multiple communication standards and rates, the circuit board can adapt to different network environments and requirements.

[0047] In this embodiment, the isolation transformer on the circuit board integrating the isolation transformer can be a 100 Mbps isolation transformer or a 1 Gbps isolation transformer. Figure 2 and Figure 3 The 100Mbps and 1Gbps isolation transformers are staggered, occupying less circuit board area. The isolation transformer can be set to either a 100Mbps or 1Gbps isolation transformer according to customer needs, and the corresponding modules on the circuit board can be connected accordingly, improving the compatibility of the circuit board.

[0048] In one embodiment, such as Figure 1 As shown, the circuit board includes a first circuit board, on which the network port module 5, isolation transformer 1, voltage divider resistor module 3, main control module 7, physical port layer module 9, the line connecting the network port module 5 to the isolation transformer 1, and the line connecting the isolation transformer 1 to the voltage divider resistor module 3 are disposed.

[0049] like Figure 2 As shown, when the isolation transformer 1 is the 100M isolation transformer, the first layer circuit board is also provided with the line connecting the voltage divider resistor module 3 and the main control module 7.

[0050] The first layer of the circuit board refers to the top layer of the circuit board 11 with integrated isolation transformer. When the isolation transformer 1 is a 100M isolation transformer, all modules on the circuit board and the lines connecting the modules are set on the top layer.

[0051] In this embodiment, when the isolation transformer is a 100MHz isolation transformer, all modules and the connecting lines between modules are placed on the top layer. This reduces the mirroring operations and additional adjustment steps required for the bottom layer layout, improving layout design efficiency. Placing surface-mount devices on the top layer reduces the number of surface mount processes required, lowering manufacturing costs.

[0052] In one embodiment, such as Figure 3 As shown, the circuit board also includes a second circuit board. When the isolation transformer 1 is the gigabit isolation transformer, the second circuit board is provided with lines connecting the voltage divider resistor module 3 to the physical port layer module 9 and lines connecting the physical port layer module 9 to the main control module 7.

[0053] The second layer circuit board refers to the bottom layer of the integrated isolation transformer circuit board 11. When the isolation transformer 1 is a gigabit isolation transformer, the lines connecting the voltage divider resistor module 3 to the physical port layer module 9 and the lines connecting the physical port layer module 9 to the main control module 7 are set on the bottom layer, while the lines connecting other modules and other modules are set on the top layer.

[0054] In this embodiment, only the lines connecting the voltage divider resistor module and the physical port layer module, and the lines connecting the physical port layer module and the main control module are placed on the bottom layer. High-frequency signals can form an impedance loop, suppress common-mode noise and electromagnetic radiation, reduce electromagnetic interference, and at the same time avoid crossing or running parallel with other high-frequency signals on the bottom layer, reduce crosstalk, and improve signal quality.

[0055] In one embodiment, such as Figure 3 and Figure 4 As shown, it also includes a configuration detection module 2, which is mounted on the first layer circuit board and connected to the main control module 7.

[0056] When the isolation transformer 1 is the 100M isolation transformer, the line connecting the configuration detection module 2 and the main control module 7 is set on the first layer circuit board;

[0057] When the isolation transformer 1 is the 100M isolation transformer, the configuration detection module 2 is also connected to the physical port layer module 9, and the line connecting the configuration detection module 2 and the main control module 7 is set on the second layer circuit board.

[0058] The configuration detection module 2 is used to connect the circuit board to the device. The software identifies whether the isolation transformer 1 set in the circuit board is a 100M or 1G isolation transformer by recognizing the level of the main control module's I / O port, and then performs the corresponding drive. When the circuit board is set as a 100M isolation transformer, the main control module's I / O port is at a high level, and the software recognizes it as a 100M isolation transformer; when the circuit board is set as a 1G isolation transformer, the physical port layer module 9 pulls the voltage of the main control module's I / O port down to a low level of 0, and the software recognizes it as a 1G isolation transformer.

[0059] In this embodiment, by configuring the detection module to identify the level of the main control module's I / O port, the type of network transformer can be quickly determined, improving production efficiency, reducing reliance on external detection equipment, lowering production costs, and achieving more intelligent network management.

[0060] In one embodiment, such as Figure 4 As shown, an isolation transformer integrated circuit is provided, including an isolation transformer 1, a network port module 5, a voltage divider resistor module 3, a main control module 7, a configuration detection module 2, and a physical port layer module 9. One end of the isolation transformer 1 is connected to the network port module 5, and the other end of the isolation transformer 1 is connected to one end of the voltage divider resistor module 3. The main control module 7 is connected to the configuration detection module 2.

[0061] like Figure 5 As shown, when the isolation transformer 1 is a 100Mbps isolation transformer supporting 10-100Mbps, the other end of the voltage divider resistor module 3 is connected to the main control module 7;

[0062] like Figure 6 As shown, when the isolation transformer 1 is a gigabit isolation transformer supporting 10-1000Mbps, the other end of the voltage divider resistor module 3 is connected to one end of the physical port layer module 9, the other end of the physical port layer module 9 is connected to one end of the configuration detection module 2, and the other end of the configuration detection module 2 is connected to the main control module 7.

[0063] Since there is no electrical connection and potential difference between the input and output windings of isolation transformer 1, no contact loop is formed, thus preventing contact accidents. Isolation transformer 1 completely isolates the input and output electrical systems. Voltage divider module 3 adjusts the signal voltage level to meet the processing requirements of subsequent circuits while protecting other components. Network port module 5 enables the circuit board to connect to a local area network or network, achieving network communication with other devices, processing requests from clients, and sending responses. Main control module 7 (CPU) executes stored instructions for calculation and coordinates the various modules on the circuit board to achieve overall functionality. Physical port layer module 9 (PHY) handles signal processing, converting received analog signals into digital signals and amplifying, filtering, encoding, and decoding them for processing by other modules. Furthermore, because the PHY chip supports multiple communication standards and rates, the circuit board can adapt to different network environments and requirements.

[0064] The configuration detection module 2 is used to connect the circuit board to the device. The software identifies whether the isolation transformer 1 set in the circuit board is a 100M or 1G isolation transformer by recognizing the level of the main control module's I / O port, and then performs the corresponding drive. When the circuit board is set as a 100M isolation transformer, the main control module's I / O port is at a high level, and the software recognizes it as a 100M isolation transformer; when the circuit board is set as a 1G isolation transformer, the physical port layer module 9 pulls the voltage of the main control module's I / O port down to a low level of 0, and the software recognizes it as a 1G isolation transformer.

[0065] In this embodiment, the isolation transformer can be a 100Mbps or 1Gbps isolation transformer, which can be configured according to customer needs, improving circuit compatibility. By setting up a configuration detection module to identify the isolation transformer in the circuit, it is ensured that the network device and the transformer's speed match, avoiding data packet loss or delay due to speed inconsistency and improving communication quality.

[0066] In one embodiment, such as Figure 7 As shown, it also includes a protection circuit module 6, which includes a first protection circuit 601 and a second protection circuit 602. One end of the first protection circuit 601 is connected to one end of the isolation transformer, and the other end of the first protection circuit 601 is grounded.

[0067] When the isolation transformer 1 is the 100M isolation transformer, one end of the second protection circuit 602 is connected to the network port module 5, and the other end of the second protection circuit 602 is grounded.

[0068] The protection circuit module 6 is used to filter the output signal of the network port module 5.

[0069] When isolation transformer 1 is a gigabit isolation transformer, the second protection circuit 602 is not provided. The protection circuit module 6 is a Bob-Smith circuit composed of resistors and capacitors, which provides a low-impedance return path for common-mode noise on the signal line.

[0070] In this embodiment, a protection circuit module is set to reduce the impact of common-mode noise, achieve impedance matching between the signal line and the isolation transformer, reduce reflection and signal loss, protect other components in the circuit from surge impact, and improve signal transmission quality. The gigabit isolation transformer and the 100-megabit isolation transformer share the first protection circuit, which reduces the cost of the circuit.

[0071] In one embodiment, such as Figure 8As shown, when the isolation transformer 1 is the gigabit isolation transformer, the integrated circuit further includes a drive circuit 4 and a filter circuit 8. One end of the drive circuit 4 is connected to the main control module 7, and the other end of the drive circuit 4 is connected to one end of the gigabit isolation transformer 1. The other end of the gigabit isolation transformer 1 is connected to the network port module 5. One end of the filter circuit 8 is connected to one end of the gigabit isolation transformer 1, and the other end of the filter circuit 8 is grounded.

[0072] The driving circuit 4 includes four resistors: RL08, RL09, RL10, and RL11. The filter circuit 8 contains six capacitors: CL05, CL06, CL09, CL07, CL08, and CL10.

[0073] In this embodiment, a driving circuit is included to increase the driving capability of the circuit, ensure the stability of the circuit state, reduce input resistance, provide a discharge path, reduce the influence of classical and electromagnetic interference, and improve the stability of signal transmission. A filter capacitor is included to ensure the circuit obtains a stable signal, filter out electromagnetic interference such as common-mode noise, reduce signal distortion, protect other components in the circuit, extend the circuit's lifespan, and reduce costs to some extent.

[0074] In one embodiment, such as Figure 9 As shown, the configuration detection module 2 includes: a first resistor RE01, a second resistor RE02, a third resistor RE32, and a first power supply ETH_VCC33. One end of the first resistor RE01 is connected to the main control module 7, and the other end of the first resistor RE01 is connected to one end of the second resistor RE02 and one end of the third resistor RE32. The other end of the second resistor RE02 is grounded, and the other end of the third resistor RE32 is connected to the first power supply ETH_VCC33.

[0075] The first power supply ETH_VCC33 outputs a voltage of 3.3V. This voltage is divided by the second resistor RE02 and the third resistor RE32. The main control module's I / O port detects the voltage between the second resistor RE02 and the third resistor RE32. By setting the resistance of both the second resistor RE02 and the third resistor RE32 to 4.7KΩ, the voltage between them is approximately 1.25V. The main control module determines that this I / O port is at a high level, and the software then identifies it as a 100M isolation transformer.

[0076] In this embodiment, when the main control module determines that the IO port voltage is high, the software can identify that the circuit is set as a 100M isolation transformer, thereby quickly determining the type of network transformer, improving production efficiency, reducing reliance on external testing equipment, lowering production costs, and achieving more intelligent network management.

[0077] In one embodiment, such as Figure 10 As shown, when the circuit is configured as the gigabit isolation transformer, the other end of the third resistor RE32 is also connected to the physical port layer module 9.

[0078] Among them, such as Figure 10 As shown, when the isolation transformer 1 is a gigabit isolation transformer, the third resistor RE32 is connected to the physical port layer module 9. The physical port layer module 9 mainly includes a PHY chip, which converts and modulates signals.

[0079] In this embodiment, when the isolation transformer in the circuit is a gigabit isolation transformer, the configuration detection circuit 2 is connected to the physical port layer module 9. The physical port layer module 9 forces the voltage of the configuration detection circuit 2 down to 0V, so that the level detected by the IO port of the main control module 7 is low. Then the software judges it to be a gigabit isolation transformer, so as to quickly determine the type of network transformer, improve production efficiency, reduce dependence on external detection equipment, reduce production costs, and realize more intelligent network management.

[0080] In one embodiment, the 100 Mbps isolation transformer is model PSF-1626, and the gigabit isolation transformer is model PSF-2447.

[0081] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A circuit board for an integrated isolation transformer, characterized in that, It includes an isolation transformer, a voltage divider resistor module, a network port module, a main control module, and a physical port layer module, wherein one end of the isolation transformer is connected to the network port module, and the other end of the isolation transformer is connected to one end of the voltage divider resistor module; When the isolation transformer is a 100Mbps isolation transformer supporting 10-100Mbps, the other end of the voltage divider resistor module is connected to the main control module; When the isolation transformer is a gigabit isolation transformer supporting 10-1000Mbps, the other end of the voltage divider resistor module is connected to one end of the physical port layer module, and the other end of the physical port layer is connected to the main control module.

2. The circuit board according to claim 1, characterized in that, The circuit board includes a first circuit board, on which the network port module, isolation transformer, voltage divider resistor module, main control module, physical port layer module, line connecting the network port module to the isolation transformer, and line connecting the isolation transformer to the voltage divider resistor module are disposed; When the isolation transformer is the 100M isolation transformer, the first layer circuit board is also provided with a line connecting the voltage divider resistor module and the main control module.

3. The circuit board according to claim 2, characterized in that, The circuit board also includes a second circuit board. When the isolation transformer is the gigabit isolation transformer, the second circuit board is provided with lines connecting the voltage divider resistor module to the physical port layer module and lines connecting the physical port layer module to the main control module.

4. The circuit board according to claim 3, characterized in that, It also includes a configuration detection module, which is mounted on the first-layer circuit board and connected to the main control module. When the isolation transformer is the 100M isolation transformer, the line connecting the configuration detection module and the main control module is set on the first layer circuit board; When the isolation transformer is the 100M isolation transformer, the configuration detection module is also connected to the physical port layer module, and the line connecting the configuration detection module and the main control module is set on the second layer circuit board.

5. An isolation transformer integrated circuit, characterized in that, It includes an isolation transformer, a network port module, a voltage divider resistor module, a main control module, a configuration detection module, and a physical port layer module. One end of the isolation transformer is connected to the network port module, and the other end of the isolation transformer is connected to one end of the voltage divider resistor module. The main control module is connected to the configuration detection module. When the isolation transformer is a 100Mbps isolation transformer supporting 10-100Mbps, the other end of the voltage divider resistor module is connected to the main control module; When the isolation transformer is a gigabit isolation transformer supporting 10-1000Mbps, the other end of the voltage divider resistor module is connected to one end of the physical port layer module, the other end of the physical port layer is connected to the main control module, one end of the physical port layer is connected to one end of the configuration detection module, and the other end of the configuration detection module is connected to the main control module.

6. The integrated circuit according to claim 5, characterized in that, It also includes a protection circuit module, which includes a first protection circuit and a second protection circuit. One end of the first protection circuit is connected to one end of the isolation transformer, and the other end of the first protection circuit is grounded. When the isolation transformer is the 100M isolation transformer, one end of the second protection circuit is connected to the network port module, and the other end of the second protection circuit is grounded. The protection circuit module is used to filter the output signal of the network port module.

7. The circuit according to claim 6, characterized in that, When the isolation transformer is a gigabit isolation transformer, the integrated circuit further includes a drive circuit and a filter circuit, wherein one end of the drive circuit is connected to the main control module, the other end of the drive circuit is connected to one end of the gigabit isolation transformer, the other end of the gigabit isolation transformer is connected to the network port module, one end of the filter circuit is connected to one end of the gigabit isolation transformer, and the other end of the filter circuit is grounded.

8. The circuit according to claim 7, characterized in that, The configuration detection module includes a first resistor, a second resistor, a third resistor, and a first power supply. One end of the first resistor is connected to the main control module, the other end of the first resistor is connected to one end of the second resistor and one end of the third resistor, the other end of the second resistor is grounded, and the other end of the third resistor is connected to the first power supply.

9. The circuit according to claim 8, characterized in that, When the circuit is configured as the gigabit isolation transformer, the other end of the third resistor is also connected to the physical port layer module.

10. The circuit according to claim 9, characterized in that, The 100 Mbps isolation transformer is model PSF-1626, and the gigabit isolation transformer is model PSF-2447.

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