Graphics card docking station capable of switching and connecting input interfaces

Abstract

The invention discloses a graphics card docking station capable of switching and connecting input interfaces, which comprises a main board, and an OCuLink interface, a lightning interface, a PCIe signal multiplexing chipset, a selection switch and a PCIeX16 slot are integrated on the main board; the OCuLink interface and the thunder and lightning interface respectively output two groups of independent PCIe signals, the PCIe signals comprise a data signal, a clock signal and a control signal, the mainboard integrates the OCuLink interface and the thunder and lightning interface at the same time, free switching of the two interfaces is realized through a signal adaptation conversion function of the PCIe signal multiplexing chipset and a switching control function of the selection switch, and the conversion efficiency is improved. The method is suitable for all computer hosts with OCuLink interfaces or thunder and lightning interfaces in the market, a user does not need to purchase a display card docking station again due to the fact that the types of the host interfaces are changed, the use cost is reduced, and the application range is expanded.

Description

Technical Field

[0001] This invention relates to the field of graphics card expansion dock technology, and in particular to a graphics card expansion dock capable of switching the connection input interface. Background Technology

[0002] Existing graphics card expansion docks are divided into two types: OCuLink interface type and Thunderbolt interface type. Among them, OCuLink interface graphics card expansion docks can only be adapted to computer hosts with OCuLink interface, and Thunderbolt interface graphics card expansion docks can only be adapted to computer hosts with Thunderbolt interface. This has the problem of poor universality, which means that if users change to a computer host with a different interface type, they need to purchase a corresponding graphics card expansion dock. This results in high usage costs and insufficient convenience. At the same time, existing multi-interface devices lack a dedicated PCIe signal adaptation and transmission solution for graphics card expansion scenarios, making it difficult to meet the requirements of graphics card operation for signal stability and transmission efficiency. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as the poor versatility of OCuLink interface graphics card expansion docks (which can only be used with computer hosts with OCuLink interfaces and Thunderbolt interface graphics card expansion docks can only be used with computer hosts with Thunderbolt interfaces), which necessitates users to purchase new graphics card expansion docks when changing to computer hosts with different interface types. This results in high costs and inconvenience. Furthermore, existing multi-interface devices lack dedicated PCIe signal adaptation and transmission solutions for graphics card expansion scenarios, making it difficult to meet the requirements of graphics card operation for signal stability and transmission efficiency. Therefore, this invention proposes a graphics card expansion dock that can switch between connection input interfaces.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A graphics card expansion dock capable of switching connection input interfaces includes: a motherboard, the motherboard integrating an OCuLink interface, a Thunderbolt interface, a PCIe signal multiplexing chipset, a selection switch and a PCIe X16 slot; The OCuLink interface and Thunderbolt interface each output two independent sets of PCIe signals, which include data signals, clock signals and control signals; The input terminals of the PCIe signal multiplexing chipset are connected to the signal output terminals of the OCuLink interface and the Thunderbolt interface, respectively. The output terminal of the PCIe signal multiplexing chipset is connected to the PCIe X16 slot. The PCIe signal multiplexing chipset is used to realize the adaptation, conversion and transmission control of PCIe signals from different interfaces, so that both sets of interface signals can match the signal reception specifications of the PCIe X16 slot. The selection switch is electrically connected to the selection pin of the PCIe signal multiplexing chipset. By controlling the input voltage of the selection pin, the switching access and transmission path control of the two sets of interface PCIe signals can be realized, adapting to computer hosts with different interface types.

[0005] As a preferred embodiment of the graphics card expansion dock capable of switching connection input interfaces described in this invention, the data signal multiplexing chips in the PCIe signal multiplexing chipset include the TX data multiplexing chip PI3EQX16021ZLDEX and the RX data multiplexing chip PI3EQX16012ZLDEX. The input terminals of the PI3EQX16021ZLDEX are respectively connected to the PCIE_OCU_TXP0~TXP3, PCIE_OCU_TXN0~TXN3 signals of the OCuLink interface and the PCIE_TBT_TXP0~TXP3, PCIE_TBT_TXN0~TXN3 signals of the Thunderbolt interface. After signal adaptation processing, the output terminal is connected to the S_X4_TXP0~TXP3, S_X4_TXN0~TXN3 signals of the PCIeX16 slot. The input terminals of the PI3EQX16012ZLDEX are connected to the PCIE_OCU_RXP0~RXP3 and PCIE_OCU_RXN0~RXN3 signals of the OCuLink interface and the PCIE_TBT_RXP0~RXP3 and PCIE_TBT_RXN0~RXN3 signals of the Thunderbolt interface, respectively. The output terminal is connected to the S_X4_RXP0~RXP3 and S_X4_RXN0~RXN3 signals of the PCIeX16 slot.

[0006] As a preferred embodiment of the graphics card expansion dock capable of switching connection input interfaces described in this invention, wherein: the clock signal multiplexing chip in the PCIe signal multiplexing chipset is RC19202, the input terminals of the RC19202 are respectively connected to the PCIE_OCU_CLKP and PCIE_OCU_CLKN signals of the OCuLink interface and the CLK_PCIE_P and CLK_PCIE_N signals of the Thunderbolt interface, and the output terminal of the clock signal adapter synchronization control is connected to the REFCLK+ and REFCLK- signals of the PCIeX16 slot.

[0007] As a preferred embodiment of the graphics card expansion dock capable of switching connection input interfaces described in this invention, wherein: the control signal multiplexing chip in the PCIe signal multiplexing chipset is a BCT44603EGE-TR, the input terminals of the BCT44603EGE-TR are respectively connected to the PLTRST_N, WAKE#, PRSNT# signals of the OCuLink interface and the DG_BR_PERST#, DG_PCIE_WAKE_#_BR signals of the Thunderbolt interface, and the output terminals are connected to the corresponding control signal pins of the PCIeX16 slot after control signal adaptation and conversion control.

[0008] As a preferred embodiment of the graphics card expansion dock capable of switching input interfaces described in this invention, wherein: the selection switch controls the input voltage of the PCIe signal multiplexing chipset selection pin to be 3.3V or 0V; when the input voltage is 3.3V, the PCIe signal multiplexing chipset selects the PCIe signal of the Thunderbolt interface for connection; when the input voltage is 0V, the PCIe signal multiplexing chipset selects the PCIe signal of the OCuLink interface for connection.

[0009] As a preferred embodiment of the graphics card expansion dock capable of switching input interfaces described in this invention, the motherboard also integrates filter capacitors, which include 0.22uF_6.3V, 0.1uF_16V, and 10uF_6.3V specifications, respectively connected in parallel between the PCIe data signal, clock signal lines and ground, to help improve the stability of PCIe signal transmission and achieve high-quality signal transmission in conjunction with the PCIe signal multiplexing chipset.

[0010] As a preferred embodiment of the graphics card expansion dock capable of switching input interfaces described in this invention, TVS diodes, including DIODE_TVS type diodes and PESD0201-05 type diodes, are connected in parallel on the signal lines of the OCuLink interface and the Thunderbolt interface for surge protection, to prevent instantaneous high voltage from damaging circuit components on the signal transmission path and to ensure the continuity of interface signal transmission.

[0011] As a preferred embodiment of the graphics card expansion dock capable of switching input interfaces described in this invention, the motherboard also integrates resistor components, including 10K_5%, 4K7_5%, OR_5%, and 68K_1% specifications. The 10K_5% resistor is used for signal pull-up / pull-down, the 4K7_5% resistor is used for PCIe signal equalization adjustment, the OR_5% resistor is used for line continuity, and the 68K_1% resistor is used for signal matching, providing a stable circuit environment for the adapted transmission of PCIe signals.

[0012] Compared with the prior art, the beneficial effects of the present invention are: The motherboard integrates both OCuLink and Thunderbolt interfaces. Through the signal adaptation and conversion function of the PCIe signal multiplexing chipset and the switching control function of the selection switch, the two interfaces can be switched freely. It is compatible with all computer hosts on the market with OCuLink or Thunderbolt interfaces. Users do not need to purchase a new graphics card expansion dock due to changes in host interface type, reducing usage costs and expanding the scope of application.

[0013] By using dedicated TX / RX data multiplexing chips, clock multiplexing chips, and control signal multiplexing chips, the three types of PCIe signals are accurately adapted and transmitted. Combined with auxiliary components such as filter capacitors, TVS diodes, and special specification resistors, the integrity, synchronization, and stability of signal transmission are effectively guaranteed, avoiding abnormal graphics card operation caused by signal interference, surges, or timing disorders. Attached Figure Description

[0014] Figure 1 This is a perspective view of a graphics card expansion dock capable of switching connection input interfaces proposed in this invention; Figure 2 This is a circuit diagram of an Ocunlink interface for a graphics card expansion dock that can switch the input interface, as proposed in this invention. Figure 3 This is a circuit diagram of an Ocunlink interface for a graphics card expansion dock that can switch the input interface, as proposed in this invention. Figure 4 This is a circuit diagram of a PCIE16X slot for a graphics card expansion dock that can switch the connection input interface, as proposed in this invention. Figure 5 This is a circuit diagram of a PCIE16X slot for a graphics card expansion dock that can switch the connection input interface, as proposed in this invention. Figure 6 This is a circuit diagram of a PCIE16X slot for a graphics card expansion dock that can switch the connection input interface, as proposed in this invention. Figure 7 The circuit diagram of an Intel Thunderbolt 5 hub chip for a graphics card expansion dock capable of switching input interfaces is provided in this invention. Figure 8 The circuit diagram of an Intel Thunderbolt 5 hub chip for a graphics card expansion dock capable of switching input interfaces is provided in this invention. Figure 9 This is a circuit diagram of a PCIE clock generator for a graphics card expansion dock capable of switching input interfaces, as proposed in this invention. Figure 10 This is a circuit diagram of a signal level conversion chip for a graphics card expansion dock capable of switching connected input interfaces, as proposed in this invention. Figure 11 This invention presents a circuit diagram of a PCIE data transmission signal multiplexer for a graphics card expansion dock capable of switching input interfaces. Figure 12 This invention presents a circuit diagram of a PCIE data transmission signal multiplexer for a graphics card expansion dock capable of switching input interfaces. Figure 13 This invention presents a circuit diagram of a PCIE data transmission signal multiplexer for a graphics card expansion dock capable of switching input interfaces. Figure 14 This invention presents a circuit diagram of a PCIE data receiving signal multiplexer for a graphics card expansion dock capable of switching connected input interfaces. Figure 15 This invention presents a circuit diagram of a PCIE data receiving signal multiplexer for a graphics card expansion dock capable of switching connected input interfaces. Figure 16 This invention presents a circuit diagram of a PCIE data receiving signal multiplexer for a graphics card expansion dock capable of switching connected input interfaces. Figure 17 This invention presents a circuit diagram of a PCIE clock signal multiplexer for a graphics card expansion dock capable of switching input interfaces. Figure 18 This invention presents a circuit diagram of a PCIE signal switching switch for a graphics card expansion dock capable of switching the input interface. Figure 19 This invention presents a circuit diagram of a PCIE control signal multiplexer for a graphics card expansion dock capable of switching input interfaces. Figure 20 This invention presents a circuit diagram of a PCIE control signal multiplexer for a graphics card expansion dock capable of switching input interfaces. Detailed Implementation

[0015] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] Reference Figures 1-20 This is a graphics card expansion dock that can switch the connection input interface. Considering that existing graphics card expansion docks only integrate a single interface and cannot be adapted to computer hosts with different interface types, resulting in extremely poor versatility, this graphics card expansion dock includes a motherboard. The motherboard integrates an OCuLink interface, a Thunderbolt interface, a PCIe signal multiplexing chipset, a selection switch, and a PCIe X16 slot. The OCuLink interface and Thunderbolt interface each output two independent sets of PCIe signals, including data signals, clock signals, and control signals. The input terminals of the PCIe signal multiplexing chipset are connected to the signal output terminals of the OCuLink interface and the Thunderbolt interface, respectively. The output terminal of the PCIe signal multiplexing chipset is connected to the PCIe X16 slot. The PCIe signal multiplexing chipset is used to realize the adaptation, conversion and transmission control of PCIe signals of different interfaces, so that both sets of interface signals can match the signal reception specifications of the PCIe X16 slot. The selector switch is electrically connected to the selector pin of the PCIe signal multiplexing chipset. By controlling the input voltage of the selector pin, the switching access and transmission path control of the two sets of interface PCIe signals can be realized, adapting to computer hosts with different interface types.

[0018] Considering that PCIe data signals are divided into transmit and receive types, the TX and RX signals of the two sets of interfaces need to be switched independently and precisely to ensure the integrity of data transmission. The data signal multiplexing chips in the PCIe signal multiplexing chipset include the TX data multiplexing chip PI3EQX16021ZLDEX and the RX data multiplexing chip PI3EQX16012ZLDEX. The input terminals of PI3EQX16021ZLDEX are respectively connected to the PCIE_OCU_TXP0~TXP3, PCIE_OCU_TXN0~TXN3 signals of the OCuLink interface and the PCIE_TBT_TXP0~TXP3, PCIE_TBT_TXN0~TXN3 signals of the Thunderbolt interface. After signal adaptation processing, the output terminal is connected to the S_X4_TXP0~TXP3, S_X4_TXN0~TXN3 signals of the PCIeX16 slot. The input terminals of the PI3EQX16012ZLDEX are connected to the PCIE_OCU_RXP0~RXP3 and PCIE_OCU_RXN0~RXN3 signals of the OCuLink interface and the PCIE_TBT_RXP0~RXP3 and PCIE_TBT_RXN0~RXN3 signals of the Thunderbolt interface, respectively. The output terminals are connected to the S_X4_RXP0~RXP3 and S_X4_RXN0~RXN3 signals of the PCIe X16 slot. It is specifically responsible for switching the RX data signals to ensure that the data transmission is complete and error-free.

[0019] Furthermore, considering that the clock signal is the core of PCIe signal synchronization transmission, if the clock signals of the two sets of interfaces cannot be switched accurately, it will cause signal transmission timing disorder and affect the normal operation of the graphics card. Therefore, the clock signal multiplexing chip in the PCIe signal multiplexing chipset needs to be RC19202. The input terminals of RC19202 are respectively connected to the PCIE_OCU_CLKP and PCIE_OCU_CLKN signals of OCuLink interface and the CLK_PCIE_P and CLK_PCIE_N signals of Thunderbolt interface. The clock signal adapter synchronization control output terminal is connected to the REFCLK+ and REFCLK- signals of PCIeX16 slot. The dedicated clock multiplexing chip ensures the stability and synchronization of the clock signal after switching.

[0020] Furthermore, considering that control signals (such as reset, wake-up, and presence detection) directly affect the core functions of the graphics card expansion dock, such as start-up, shutdown, and status feedback, the control signals of the two sets of interfaces need to be switched accordingly to ensure that the expansion dock responds normally to host commands. Therefore, the control signal multiplexing chip in the PCIe signal multiplexing chipset is the BCT44603EGE-TR. The input terminals of the BCT44603EGE-TR are respectively connected to the PLTRST_N, WAKE#, and PRSNT# signals of the OCuLink interface and the DG_BR_PERST# and DG_PCIE_WAKE_#_BR signals of the Thunderbolt interface. After control signal adaptation and conversion, the output terminal is connected to the corresponding control signal pin of the PCIeX16 slot to achieve precise adaptation of control signals.

[0021] Furthermore, considering the need to provide a simple and reliable switching method so that users can complete interface adaptation without complicated operations, the input voltage of the PCIe signal multiplexing chipset selected by the switch control pin is 3.3V or 0V. When the input voltage is 3.3V, the PCIe signal multiplexing chipset selects the PCIe signal of the Thunderbolt interface for access; when the input voltage is 0V, the PCIe signal multiplexing chipset selects the PCIe signal of the OCuLink interface for access. The interface switching logic is clearly achieved through the high and low voltage, reducing the user's operating threshold.

[0022] The motherboard also integrates filter capacitors, including 0.22uF_6.3V, 0.1uF_16V, and 10uF_6.3V specifications, which are connected in parallel between the PCIe data signal, clock signal lines and ground, respectively, to help improve the stability of PCIe signal transmission and achieve high-quality signal transmission in conjunction with the PCIe signal multiplexing chipset.

[0023] Considering that electrostatic surges may occur during interface plugging and unplugging, and that instantaneous high voltage in the external environment may also damage circuit components, affecting the service life and reliability of the docking station, TVS diodes, including DIODE_TVS type diodes and PESD0201-05 type diodes, are connected in parallel on the signal lines of the OCuLink interface and the Thunderbolt interface for surge protection, to prevent instantaneous high voltage from damaging circuit components on the signal transmission path and to ensure the continuity of interface signal transmission.

[0024] The motherboard also integrates resistors, including 10K_5%, 4K7_5%, OR_5%, and 68K_1% resistors. The 10K_5% resistors are used for signal pull-up / pull-down, the 4K7_5% resistors are used for PCIe signal equalization, the OR_5% resistors are used for line continuity, and the 68K_1% resistors are used for signal matching, providing a stable circuit environment for the adaptation and transmission of PCIe signals.

[0025] In summary, the working process of this solution is as follows: If the computer host has a Thunderbolt interface, connect one end of the Thunderbolt cable to the Thunderbolt interface on the host and the other end to the Thunderbolt interface on the expansion dock. Then, toggle the selector switch to input 3.3V voltage to the select pins of the PCIe signal multiplexing chipset (PI3EQX16021ZLDEX, PI3EQX16012ZLDEX, RC19202, BCT44603EGE-TR). At this time, each multiplexing chip switches to the Thunderbolt interface signal channel, and the Thunderbolt interface outputs PCIE_TBT_TXP0~TXP3, PCIE_TBT_TX... The signals N0~TXN3 (TX data signals), PCIE_TBT_RXP0~RXP3, PCIE_TBT_RXN0~RXN3 (RX data signals), CLK_PCIE_P, CLK_PCIE_N (clock signals), and DG_BR_PERST#, DG_PCIE_WAKE_#_BR (control signals) are processed by the corresponding multiplexing chip and then transmitted to the PCIe X16 slot. After receiving the above signals, the discrete graphics card connected to the PCIe X16 slot can work normally and provide graphics processing capabilities to the computer host. If the computer host has an OCuLink interface, connect one end of the OCuLink cable to the host's OCuLink interface and the other end to the OCuLink interface of the expansion dock. Then, toggle the selection switch to input 0V voltage to the selection pin of the PCIe signal multiplexing chipset. At this time, each multiplexing chip switches to the OCuLink interface signal channel. The PCIE_OCU_TXP0~TXP3, PCIE_OCU_TXN0~TXN3 (TX data signals), PCIE_OCU_RXP0~RXP3, PCIE_OCU_RXN0~RXN3 (RX data signals), PCIE_OCU_CLKP, PCIE_OCU_CLKN (clock signals) and PLTRST_N, WAKE#, PRSNT# (control signals) output by the OCuLink interface are processed by the corresponding multiplexing chips and then transmitted to the PCIe X16 slot. After the discrete graphics card receives the signal, it can operate normally, realizing the expansion of graphics processing capabilities.

[0026] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0027] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A graphics card expansion dock capable of switching input interfaces, comprising: The motherboard is characterized in that it integrates an OCuLink interface, a Thunderbolt interface, a PCIe signal multiplexing chipset, a selection switch, and a PCIe X16 slot. The OCuLink interface and Thunderbolt interface each output two independent sets of PCIe signals, which include data signals, clock signals and control signals; The input terminals of the PCIe signal multiplexing chipset are connected to the signal output terminals of the OCuLink interface and the Thunderbolt interface, respectively. The output terminal of the PCIe signal multiplexing chipset is connected to the PCIe X16 slot. The PCIe signal multiplexing chipset is used to realize the adaptation, conversion and transmission control of PCIe signals from different interfaces, so that both sets of interface signals can match the signal reception specifications of the PCIe X16 slot. The selection switch is electrically connected to the selection pin of the PCIe signal multiplexing chipset. By controlling the input voltage of the selection pin, the switching access and transmission path control of the two sets of interface PCIe signals can be realized, adapting to computer hosts with different interface types.

2. The graphics card expansion dock capable of switching input interfaces according to claim 1, characterized in that: The data signal multiplexing chips in the PCIe signal multiplexing chipset include the TX data multiplexing chip PI3EQX16021ZLDEX and the RX data multiplexing chip PI3EQX16012ZLDEX. The input terminals of the PI3EQX16021ZLDEX are respectively connected to the PCIE_OCU_TXP0~TXP3, PCIE_OCU_TXN0~TXN3 signals of the OCuLink interface and the PCIE_TBT_TXP0~TXP3, PCIE_TBT_TXN0~TXN3 signals of the Thunderbolt interface. After signal adaptation processing, the output terminal is connected to the S_X4_TXP0~TXP3, S_X4_TXN0~TXN3 signals of the PCIe X16 slot. The input terminals of the PI3EQX16012ZLDEX are connected to the PCIE_OCU_RXP0~RXP3 and PCIE_OCU_RXN0~RXN3 signals of the OCuLink interface and the PCIE_TBT_RXP0~RXP3 and PCIE_TBT_RXN0~RXN3 signals of the Thunderbolt interface, respectively. The output terminal is connected to the S_X4_RXP0~RXP3 and S_X4_RXN0~RXN3 signals of the PCIeX16 slot.

3. The graphics card expansion dock capable of switching input interfaces according to claim 1, characterized in that: The clock signal multiplexing chip in the PCIe signal multiplexing chipset is RC19202. The input terminals of RC19202 are respectively connected to the PCIE_OCU_CLKP and PCIE_OCU_CLKN signals of the OCuLink interface and the CLK_PCIE_P and CLK_PCIE_N signals of the Thunderbolt interface. The output terminal of the clock signal adapter synchronization control is connected to the REFCLK+ and REFCLK- signals of the PCIeX16 slot.

4. The graphics card expansion dock capable of switching input interfaces according to claim 1, characterized in that: The control signal multiplexing chip in the PCIe signal multiplexing chipset is BCT44603EGE-TR. The input terminals of the BCT44603EGE-TR are respectively connected to the PLTRST_N, WAKE#, and PRSNT# signals of the OCuLink interface and the DG_BR_PERST# and DG_PCIE_WAKE_#_BR signals of the Thunderbolt interface. After control signal adapter conversion and control, the output terminal is connected to the corresponding control signal pin of the PCIe X16 slot.

5. The graphics card expansion dock capable of switching input interfaces according to claim 1, characterized in that: The selection switch controls the input voltage of the PCIe signal multiplexing chip group's selection pin to be 3.3V or 0V. When the input voltage is 3.3V, the PCIe signal multiplexing chip group selects the PCIe signal of the Thunderbolt interface for access. When the input voltage is 0V, the PCIe signal multiplexing chip group selects the PCIe signal of the OCuLink interface for access.

6. The graphics card expansion dock capable of switching input interfaces according to claim 1, characterized in that: The motherboard also integrates filter capacitors, which include 0.22uF_6.3V, 0.1uF_16V, and 10uF_6.3V specifications. These filter capacitors are connected in parallel between the PCIe data signal and clock signal lines and ground, respectively, to help improve the stability of PCIe signal transmission and achieve high-quality signal transmission in conjunction with the PCIe signal multiplexing chipset.

7. The graphics card expansion dock capable of switching input interfaces according to claim 1, characterized in that: TVS diodes, including DIODE_TVS type diodes and PESD0201-05 type diodes, are connected in parallel on the signal lines of the OCuLink interface and the Thunderbolt interface for surge protection. This prevents instantaneous high voltage from damaging circuit components on the signal transmission path and ensures the continuity of interface signal transmission.

8. The graphics card expansion dock capable of switching input interfaces according to claim 1, characterized in that: The motherboard also integrates resistors, including those with specifications of 10K_5%, 4K7_5%, OR_5%, and 68K_1%. The 10K_5% resistor is used for signal pull-up / pull-down, the 4K7_5% resistor is used for PCIe signal equalization, the OR_5% resistor is used for line continuity, and the 68K_1% resistor is used for signal matching, providing a stable circuit environment for the adapted transmission of PCIe signals.

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