Signal conversion circuit

Abstract

The utility model relates to the technical field of communication equipment, in particular to a signal conversion circuit, which comprises a 5G cellular module used for receiving base station signals, an Ethernet controller circuit, a power supply circuit, an SIM (subscriber identity module) card circuit and a WAN (wide area network) interface circuit. The power supply circuit is electrically connected with the 5G cellular module and the Ethernet controller circuit, and the 5G cellular module is connected with the Ethernet controller circuit through a PCIE interface; by integrating a 5G cellular module and an Ethernet controller circuit, efficient conversion from a 5G cellular signal received from a base station to a WAN format signal is realized. According to the design, high-speed mobile signals are allowed to be directly accessed into an existing network architecture, the data transmission rate as high as 1Gbps is supported, and the internet surfing experience of a user is greatly improved. By means of the design, efficient conversion from 5G cellular signals to WAN signals is achieved, the overall system performance is greatly improved in the modes of optimizing hardware design, improving compatibility and expansibility and the like, and the development difficulty and cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication equipment technical field, concretely relates to a signal conversion circuit. BACKGROUND

[0002] With the popularization of the fifth generation mobile communication technology (5G), this new generation of broadband mobile communication technology with high speed, low latency and large connection characteristics is gradually changing our way of life and work. 5G technology not only supports ultra-high-definition video transmission, virtual reality and augmented reality applications, but also shows great potential in the Internet of Things, intelligent transportation, remote medical care and other fields. In order to fully utilize the superior performance of 5G network, a series of online devices that convert 5G cellular signals into WiFi signals have emerged in the market. This kind of device receives signals from the base station through the built-in 5G cellular module, and converts it into WiFi signal available for users through the routing chip.

[0003] However, in the actual development process, the researchers face a key technical challenge: how to effectively improve the communication rate between 5G cellular module and routing chip. At present, the communication between the two is mainly based on PCIE interface, but the existing communication rate is far lower than the expected standard, only reaching two or three hundred Mbps, which is far from the promised gigabit per second data transmission capacity of 5G technology. The existence of this problem not only limits the performance of the terminal product, but also makes the software debugging process extremely complex, increasing the product development cycle and cost. UTILITY MODEL CONTENT

[0004] The utility model provides a signal conversion circuit that reduces design difficulty and improves communication rate to solve the defects and deficiencies of prior art.

[0005] To achieve the above purpose, the utility model takes the technical scheme that a signal conversion circuit, including 5G cellular module for receiving base station signal, ethernet controller circuit, power supply circuit, SIM card circuit and WAN interface circuit, the power supply circuit with the 5G cellular module, ethernet controller circuit electricity is connected, the 5G cellular module is connected with the ethernet controller circuit through PCIE interface, the ethernet controller circuit is connected with the WAN interface circuit through MDI interface electricity, the 5G cellular module is connected with the SIM card circuit electricity, the 5G cellular module is provided with antenna interface, the antenna interface is connected with antenna electricity.

[0006] Further; the 5G cellular module includes a 5G module signal interface, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first capacitor, a second capacitor, a first TVS protection diode, and a pad; one end of the first resistor is electrically connected to the pad, and the other end is electrically connected to the SIM card circuit; one end of the second resistor is grounded, and the other end is electrically connected to the seventh pin of the 5G module signal interface; one end of the first TVS protection diode is grounded, and the other end is electrically connected to the eighty-first pin of the 5G module signal interface. The pads are electrically connected to pin 81 of the 5G module signal interface; one end of the first capacitor is electrically connected to pin 44 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the second capacitor is electrically connected to pin 46 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the third resistor is electrically connected to pin 32 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the fourth resistor is electrically connected to pin 34 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; the first... One end of the fifth resistor is electrically connected to pin 38 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the sixth resistor is electrically connected to pin 40 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the seventh resistor is electrically connected to pin 36 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the eighth resistor is electrically connected to pin 39 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the ninth resistor is electrically connected to pin 30 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. The 10th and 11th resistors are electrically connected to the Ethernet controller circuit; one end of the 10th resistor is connected in series with the 36th pin of the 5G module signal interface, and the other end is connected to the 30th pin of the 5G module signal interface; one end of the 12th resistor is connected to the 39th pin of the 5G module signal interface, and the other end is connected to the common terminal of the 10th and 11th resistors, which is electrically connected to the SIM card circuit; pins 249, 244, 247, and 248 of the 5G module signal interface are all electrically connected to the SIM card circuit.

[0007] Further, the Ethernet controller circuit includes a routing chip PHY, a crystal oscillator, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, and a twenty-first resistor; one end of the thirteenth resistor is electrically connected to the twenty-fifth pin of the routing chip PHY, and the other end is connected to a 3.3V power supply; one end of the third capacitor is grounded, and the other end is electrically connected to the twenty-eighth pin of the routing chip PHY; the fourth capacitor and the fourteenth resistor are connected in series, one end is grounded, and the other end is connected to the routing chip PHY. The 29th pin of the PHY chip is electrically connected; one end of the crystal oscillator is electrically connected to the third capacitor, and the other end is electrically connected to the fourteenth resistor; one end of the fifteenth resistor is grounded, and the other end is electrically connected to the 31st pin of the routing chip PHY; the 33rd pin of the routing chip PHY is grounded; the first, second, fourth, fifth, sixth, seventh, ninth, and tenth pins of the routing chip PHY are all connected to the W... The AN interface circuit is electrically connected; pin 21 of the routing chip PHY is electrically connected to the ninth resistor, pin 19 of the routing chip PHY is electrically connected to the eighth resistor, one end of the fifth capacitor is electrically connected to pin 18 of the routing chip PHY, and the other end is electrically connected to the third resistor; one end of the sixth capacitor is electrically connected to pin 17 of the routing chip PHY, and the other end is electrically connected to the fourth resistor; one end of the sixteenth resistor is electrically connected to pin 15 of the routing chip PHY, and the other end is grounded; one end of the seventeenth resistor is electrically connected to pin 16 of the routing chip PHY, and the other end... One end of the eighteenth resistor is electrically connected to the sixteenth resistor; one end of the eighteenth resistor is electrically connected to the sixteenth pin of the routing chip PHY, and the other end is electrically connected to the fifth resistor; one end of the nineteenth resistor is electrically connected to the fifteenth pin of the routing chip PHY, and the other end is electrically connected to the sixth resistor; one end of the twentieth resistor is electrically connected to the fourteenth pin of the routing chip PHY, and the other end is electrically connected to the first capacitor; one end of the twenty-first resistor is electrically connected to the thirteenth pin of the routing chip PHY, and the other end is electrically connected to the second capacitor; and the twelfth pin of the routing chip PHY is electrically connected to the seventh resistor.

[0008] Further, the WAN interface circuit includes a WAN interface, a first common-mode filter, a second common-mode filter, a third common-mode filter, a fourth common-mode filter, a second TVS protection diode, a third TVS protection diode, a fourth TVS protection diode, a fifth TVS protection diode, a sixth TVS protection diode, a seventh TVS protection diode, an eighth TVS protection diode, and a ninth TVS protection diode; the second pin of the first common-mode filter is electrically connected to the eighth pin of the WAN interface, and the third pin of the first common-mode filter is electrically connected to the tenth pin of the routing chip PHY; the first pin of the first common-mode filter is electrically connected to the seventh pin of the WAN interface, and the fourth pin of the first common-mode filter is electrically connected to the ninth pin of the routing chip PHY; one end of the second TVS protection diode is grounded, and the other end is electrically connected to the third pin of the first common-mode filter; one end of the third TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the first common-mode filter.

[0009] The second pin of the second common-mode filter is electrically connected to the fifth pin of the WAN interface, and the third pin of the second common-mode filter is electrically connected to the seventh pin of the routing chip PHY; the first pin of the second common-mode filter is electrically connected to the fourth pin of the WAN interface, and the fourth pin of the second common-mode filter is electrically connected to the sixth pin of the routing chip PHY; one end of the fourth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the second common-mode filter; one end of the fifth TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the second common-mode filter.

[0010] The second pin of the third common-mode filter is electrically connected to the sixth pin of the WAN interface, and the third pin of the third common-mode filter is electrically connected to the fifth pin of the routing chip PHY; the first pin of the third common-mode filter is electrically connected to the third pin of the WAN interface, and the fourth pin of the third common-mode filter is electrically connected to the fourth pin of the routing chip PHY; one end of the sixth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the third common-mode filter; one end of the seventh TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the third common-mode filter.

[0011] The second pin of the fourth common-mode filter is electrically connected to the second pin of the WAN interface, and the third pin of the fourth common-mode filter is electrically connected to the second pin of the routing chip PHY; the first pin of the fourth common-mode filter is electrically connected to the first pin of the WAN interface, and the fourth pin of the fourth common-mode filter is electrically connected to the first pin of the routing chip PHY; one end of the eighth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the fourth common-mode filter; one end of the ninth TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the fourth common-mode filter.

[0012] Further, the SIM card circuit includes a SIM card interface, a 22nd resistor, a 23rd resistor, a 24th resistor, a 25th resistor, a 26th resistor, a 7th capacitor, an 8th capacitor, a 9th capacitor, a 10th capacitor, an 11th capacitor, a 10th TVS protection diode, an 11th TVS protection diode, a 12th TVS protection diode, a 13th TVS protection diode, and a 14th TVS protection diode; one end of the 7th capacitor is grounded, and the other end is electrically connected to the first C pin of the SIM card interface; one end of the 8th capacitor is grounded, and the other end is electrically connected to the first C pin of the SIM card interface; one end of the 10th TVS protection diode is grounded, and the other end is electrically connected to the first C pin of the SIM card interface; one end of the 22nd resistor is electrically connected to the second C pin of the SIM card interface, and the other end is electrically connected to the 244th pin of the 5G module signal interface; one end of the 23rd resistor is electrically connected to the third C pin of the SIM card interface, and the other end is electrically connected to the 247th pin of the 5G module signal interface; one end of the 24th resistor is electrically connected to the 7th C pin of the SIM card interface, and the other end is electrically connected to the 5G module signal interface. The 248th pin of the interface is electrically connected; the CD pin of the SIM card interface is electrically connected to the 249th pin of the 5G module signal interface; one end of the ninth capacitor is grounded and the other end is electrically connected to the 22nd resistor; one end of the tenth capacitor is grounded and the other end is electrically connected to the 23rd resistor; one end of the eleventh capacitor is grounded and the other end is electrically connected to the 24th resistor; one end of the 25th resistor is connected to the eleventh capacitor and the other end is connected to VDD; one end of the 26th resistor is electrically connected to the fourteenth TVS protection diode and the other end is electrically connected to the second resistor; one end of the fourteenth TVS protection diode is electrically connected to the CD pin of the SIM card interface and the other end is grounded; one end of the thirteenth TVS protection diode is grounded and the other end is electrically connected to the seventh C pin of the SIM card interface; one end of the twelfth TVS protection diode is grounded and the other end is electrically connected to the third C pin of the SIM card interface; one end of the eleventh TVS protection diode is grounded and the other end is electrically connected to the second C pin of the SIM card interface; the first, second, third, and fourth pins of the SIM card interface are all grounded.

[0013] The utility model discloses a beneficial effect has:

[0014] This invention provides a signal conversion circuit that integrates a 5G cellular module and an Ethernet controller circuit to achieve efficient conversion of 5G cellular signals received from a base station into WAN format signals. This design allows high-speed mobile signals to be directly integrated into existing network architectures, supporting data transmission rates up to 1Gbps, significantly improving the user's internet experience. This design not only achieves efficient conversion from 5G cellular signals to WAN signals but also significantly improves overall system performance and reduces development difficulty and cost through optimized hardware design, enhanced compatibility and scalability. Attached Figure Description

[0015] Fig. 1 This is a block diagram illustrating the working principle of a signal conversion circuit according to this utility model.

[0016] Fig. 2 This is a circuit diagram of a 5G cellular module in a signal conversion circuit according to the present invention.

[0017] Fig. 3 This is a circuit diagram of an Ethernet controller circuit in a signal conversion circuit according to the present invention.

[0018] Fig. 4 This is a circuit diagram of a WAN interface circuit in a signal conversion circuit according to the present invention.

[0019] Fig. 5 This is a circuit diagram of a SIM card circuit in a signal conversion circuit according to the present invention.

[0020] Fig. 6 This is a circuit diagram of the power supply circuit in a signal conversion circuit according to the present invention. Detailed Implementation

[0021] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0024] This invention proposes a signal conversion circuit.

[0025] In the embodiments of this utility model, such as Fig. 1-6 As shown, this signal conversion circuit includes a 5G cellular module for receiving base station signals, an Ethernet controller circuit, a power supply circuit, a SIM card circuit, and a WAN interface circuit. The power supply circuit is electrically connected to the 5G cellular module and the Ethernet controller circuit. The 5G cellular module is connected to the Ethernet controller circuit via a PCIe interface. The Ethernet controller circuit is electrically connected to the WAN interface circuit via an MDI interface. The 5G cellular module is electrically connected to the SIM card circuit. The 5G cellular module is provided with an antenna interface, and an antenna is electrically connected to the antenna interface.

[0026] In this embodiment, the 5G cellular module includes a 5G module signal interface, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first capacitor, a second capacitor, a first TVS protection diode, and a pad. One end of the first resistor is electrically connected to the pad, and the other end is electrically connected to the SIM card circuit. One end of the second resistor is grounded, and the other end is electrically connected to the seventh pin of the 5G module signal interface. One end of the first TVS protection diode is grounded, and the other end is electrically connected to the eighty-first pin of the 5G module signal interface. The pad is electrically connected to pin 81 of the 5G module signal interface; one end of the first capacitor is electrically connected to pin 44 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the second capacitor is electrically connected to pin 46 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the third resistor is electrically connected to pin 32 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the fourth resistor is electrically connected to pin 34 of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; One end of the fifth resistor is electrically connected to the thirty-eighth pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the sixth resistor is electrically connected to the fortieth pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the seventh resistor is electrically connected to the thirty-sixth pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the eighth resistor is electrically connected to the thirty-ninth pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the ninth resistor is electrically connected to the thirtieth pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. The 10th and 11th resistors are electrically connected to the Ethernet controller circuit; one end of the 10th resistor is connected in series with the 36th pin of the 5G module signal interface, and the other end is connected to the 30th pin of the 5G module signal interface; one end of the 12th resistor is connected to the 39th pin of the 5G module signal interface, and the other end is connected to the common terminal of the 10th and 11th resistors, which is electrically connected to the SIM card circuit; pins 249, 244, 247, and 248 of the 5G module signal interface are all electrically connected to the SIM card circuit.

[0027] In this embodiment, the Ethernet controller circuit includes a routing chip PHY, a crystal oscillator, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, and a twenty-first resistor. One end of the thirteenth resistor is electrically connected to the twenty-fifth pin of the routing chip PHY, and the other end is connected to a 3.3V power supply. One end of the third capacitor is grounded, and the other end is electrically connected to the twenty-eighth pin of the routing chip PHY. The fourth capacitor and the fourteenth resistor are connected in series, with one end grounded and the other end connected to the... The crystal oscillator is electrically connected to the 29th pin of the PHY chip. One end of the crystal oscillator is electrically connected to the third capacitor, and the other end is electrically connected to the fourteenth resistor. One end of the fifteenth resistor is grounded, and the other end is electrically connected to the 31st pin of the routing chip PHY. The 33rd pin of the routing chip PHY is grounded. The first, second, fourth, fifth, sixth, seventh, ninth, and tenth pins of the routing chip PHY are all connected to the... The WAN interface circuit is electrically connected as follows: Pin 21 of the routing chip PHY is electrically connected to the ninth resistor; pin 19 of the routing chip PHY is electrically connected to the eighth resistor; one end of the fifth capacitor is electrically connected to pin 18 of the routing chip PHY, and the other end is electrically connected to the third resistor; one end of the sixth capacitor is electrically connected to pin 17 of the routing chip PHY, and the other end is electrically connected to the fourth resistor; one end of the sixteenth resistor is electrically connected to pin 15 of the routing chip PHY, and the other end is grounded; one end of the seventeenth resistor is electrically connected to pin 16 of the routing chip PHY, and the other end... One end of the eighteenth resistor is electrically connected to the sixteenth resistor; one end of the eighteenth resistor is electrically connected to the sixteenth pin of the routing chip PHY, and the other end is electrically connected to the fifth resistor; one end of the nineteenth resistor is electrically connected to the fifteenth pin of the routing chip PHY, and the other end is electrically connected to the sixth resistor; one end of the twentieth resistor is electrically connected to the fourteenth pin of the routing chip PHY, and the other end is electrically connected to the first capacitor; one end of the twenty-first resistor is electrically connected to the thirteenth pin of the routing chip PHY, and the other end is electrically connected to the second capacitor; and the twelfth pin of the routing chip PHY is electrically connected to the seventh resistor.

[0028] In this embodiment, the WAN interface circuit includes a WAN interface, a first common-mode filter, a second common-mode filter, a third common-mode filter, a fourth common-mode filter, a second TVS protection diode, a third TVS protection diode, a fourth TVS protection diode, a fifth TVS protection diode, a sixth TVS protection diode, a seventh TVS protection diode, an eighth TVS protection diode, and a ninth TVS protection diode. The second pin of the first common-mode filter is electrically connected to the eighth pin of the WAN interface, and the third pin of the first common-mode filter is electrically connected to the tenth pin of the routing chip PHY. The first pin of the first common-mode filter is electrically connected to the seventh pin of the WAN interface, and the fourth pin of the first common-mode filter is electrically connected to the ninth pin of the routing chip PHY. One end of the second TVS protection diode is grounded, and the other end is electrically connected to the third pin of the first common-mode filter. One end of the third TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the first common-mode filter.

[0029] The second pin of the second common-mode filter is electrically connected to the fifth pin of the WAN interface, and the third pin of the second common-mode filter is electrically connected to the seventh pin of the routing chip PHY; the first pin of the second common-mode filter is electrically connected to the fourth pin of the WAN interface, and the fourth pin of the second common-mode filter is electrically connected to the sixth pin of the routing chip PHY; one end of the fourth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the second common-mode filter; one end of the fifth TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the second common-mode filter.

[0030] The second pin of the third common-mode filter is electrically connected to the sixth pin of the WAN interface, and the third pin of the third common-mode filter is electrically connected to the fifth pin of the routing chip PHY; the first pin of the third common-mode filter is electrically connected to the third pin of the WAN interface, and the fourth pin of the third common-mode filter is electrically connected to the fourth pin of the routing chip PHY; one end of the sixth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the third common-mode filter; one end of the seventh TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the third common-mode filter.

[0031] The second pin of the fourth common-mode filter is electrically connected to the second pin of the WAN interface, and the third pin of the fourth common-mode filter is electrically connected to the second pin of the routing chip PHY; the first pin of the fourth common-mode filter is electrically connected to the first pin of the WAN interface, and the fourth pin of the fourth common-mode filter is electrically connected to the first pin of the routing chip PHY; one end of the eighth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the fourth common-mode filter; one end of the ninth TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the fourth common-mode filter.

[0032] In this embodiment, the SIM card circuit includes a SIM card interface, a 22nd resistor, a 23rd resistor, a 24th resistor, a 25th resistor, a 26th resistor, a 7th capacitor, an 8th capacitor, a 9th capacitor, a 10th capacitor, an 11th capacitor, a 10th TVS protection diode, an 11th TVS protection diode, a 12th TVS protection diode, a 13th TVS protection diode, and a 14th TVS protection diode. One end of the 7th capacitor is grounded, and the other end is electrically connected to the first C pin of the SIM card interface. One end of the 8th capacitor is grounded, and the other end is electrically connected to the first C pin of the SIM card interface. One end of the 10th TVS protection diode is grounded, and the other end is electrically connected to the first C pin of the SIM card interface. One end of the 22nd resistor is electrically connected to the second C pin of the SIM card interface, and the other end is electrically connected to the 244th pin of the 5G module signal interface. One end of the 23rd resistor is electrically connected to the third C pin of the SIM card interface, and the other end is electrically connected to the 247th pin of the 5G module signal interface. One end of the 24th resistor is electrically connected to the 7th C pin of the SIM card interface, and the other end is electrically connected to the 5G module signal interface. The 248th pin of the SIM card interface is electrically connected; the CD pin of the SIM card interface is electrically connected to the 249th pin of the 5G module signal interface; one end of the ninth capacitor is grounded and the other end is electrically connected to the 22nd resistor; one end of the tenth capacitor is grounded and the other end is electrically connected to the 23rd resistor; one end of the eleventh capacitor is grounded and the other end is electrically connected to the 24th resistor; one end of the 25th resistor is connected to the eleventh capacitor and the other end is connected to VDD; one end of the 26th resistor is electrically connected to the fourteenth TVS protection diode and the other end is electrically connected to the second resistor; one end of the fourteenth TVS protection diode is electrically connected to the CD pin of the SIM card interface and the other end is grounded; one end of the thirteenth TVS protection diode is grounded and the other end is electrically connected to the seventh C pin of the SIM card interface; one end of the twelfth TVS protection diode is grounded and the other end is electrically connected to the third C pin of the SIM card interface; one end of the eleventh TVS protection diode is grounded and the other end is electrically connected to the second C pin of the SIM card interface; the first, second, third, and fourth pins of the SIM card interface are all grounded.

[0033] Specifically, the 5G cellular module is used to receive signals from the base station; the routing chip PHYRTL8111H is used to convert PCIe signals into WAN signals; in actual use, the user first needs to insert the SIM card into the SIM card interface, and then connect the power supply to the input terminal of the power supply circuit. At this time, the 3.3V and 3.8V are output normally, respectively to the routing chip PHYRTL8111H and the 5G cellular module. After the 5G cellular module is working normally, it will receive electromagnetic wave signals from the base station through the antenna.

[0034] This application achieves mobile internet access with a peak speed of 1Gbps by converting 5G cellular signals into WAN-compliant signals and then directly connecting them to the port of the router chip's PHY. This further reduces development costs and difficulty while effectively improving communication speed.

[0035] The power supply circuit provides stable power support for the entire system, including powering the 5G cellular module and Ethernet controller circuitry, ensuring the proper functioning of all components. Furthermore, the integrated SIM card circuitry allows users to easily access mobile networks by inserting a SIM card, eliminating the need for additional configuration, simplifying hardware design and reducing development costs.

[0036] The system employs a standard PCIe interface to connect the 5G cellular module and the Ethernet controller circuit, and uses an MDI interface to enable communication between the Ethernet controller circuit and the WAN interface circuit, enhancing system compatibility and scalability. This not only facilitates integration between different modules but also provides possibilities for future upgrades.

[0037] The design of the antenna interface and the antenna connected to it ensures that the 5G cellular module can effectively receive electromagnetic wave signals from the base station, improving the quality and stability of signal reception. This is crucial for maintaining a stable and fast network connection in various environments.

[0038] This application addresses the low communication rate issue inherent in traditional solutions through reasonable component selection and layout, significantly improving data processing efficiency and transmission speed. Simultaneously, it reduces the complexity of software debugging, shortens product development cycles, and provides users with a more stable and efficient solution to enjoy the convenience brought by 5G technology.

[0039] In summary, the technical solution proposed in this application not only achieves efficient conversion from 5G cellular signals to WAN signals, but also significantly improves overall system performance and reduces development difficulty and cost by optimizing hardware design, enhancing compatibility and scalability.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A signal conversion circuit, characterized in that, The device includes a 5G cellular module for receiving base station signals, an Ethernet controller circuit, a power supply circuit, a SIM card circuit, and a WAN interface circuit. The power supply circuit is electrically connected to the 5G cellular module and the Ethernet controller circuit. The 5G cellular module is connected to the Ethernet controller circuit via a PCIe interface. The Ethernet controller circuit is electrically connected to the WAN interface circuit via an MDI interface. The 5G cellular module is electrically connected to the SIM card circuit. The 5G cellular module is equipped with an antenna interface, and an antenna is electrically connected to the antenna interface.

2. The signal conversion circuit as described in claim 1, characterized in that, The 5G cellular module includes a 5G module signal interface, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first capacitor, a second capacitor, a first TVS protection diode, and a pad. One end of the first resistor is electrically connected to the pad, and the other end is electrically connected to the SIM card circuit. One end of the second resistor is grounded, and the other end is electrically connected to the seventh pin of the 5G module signal interface. One end of the first TVS protection diode is grounded, and the other end is electrically connected to the eighty-first pin of the 5G module signal interface. The pad and... The 81st pin of the 5G module signal interface is electrically connected; one end of the first capacitor is electrically connected to the 44th pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the second capacitor is electrically connected to the 46th pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the third resistor is electrically connected to the 32nd pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; one end of the fourth resistor is electrically connected to the 34th pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit; the fifth resistor... One end of the sixth resistor is electrically connected to the 38th pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the seventh resistor is electrically connected to the 36th pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the eighth resistor is electrically connected to the 39th pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. One end of the ninth resistor is electrically connected to the 30th pin of the 5G module signal interface, and the other end is electrically connected to the Ethernet controller circuit. The Ethernet controller circuit is electrically connected; the tenth resistor and the eleventh resistor are connected in series, with one end electrically connected to the thirty-sixth pin of the 5G module signal interface and the other end electrically connected to the thirtieth pin of the 5G module signal interface; one end of the twelfth resistor is electrically connected to the thirty-ninth pin of the 5G module signal interface, and the other end is connected to the common terminal of the tenth resistor and the eleventh resistor, which is electrically connected to the SIM card circuit; the two hundred and forty-ninth pin, the two hundred and forty-fourth pin, the two hundred and forty-seventh pin, and the two hundred and forty-eighth pin of the 5G module signal interface are all electrically connected to the SIM card circuit.

3. The signal conversion circuit as described in claim 2, characterized in that, The Ethernet controller circuit includes a routing chip PHY, a crystal oscillator, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, and a twenty-first resistor. One end of the thirteenth resistor is electrically connected to the twenty-fifth pin of the routing chip PHY, and the other end is connected to a 3.3V power supply. One end of the third capacitor is grounded, and the other end is electrically connected to the twenty-eighth pin of the routing chip PHY. The fourth capacitor and the fourteenth resistor are connected in series, with one end grounded and the other end connected to the routing chip PHY. The 29th pin is electrically connected, one end of the crystal oscillator is electrically connected to the third capacitor, and the other end is electrically connected to the fourteenth resistor; one end of the fifteenth resistor is grounded, and the other end is electrically connected to the 31st pin of the routing chip PHY, and the 33rd pin of the routing chip PHY is grounded; the first, second, fourth, fifth, sixth, seventh, ninth, and tenth pins of the routing chip PHY are all connected to the WAN connector. The circuit is electrically connected as follows: the 21st pin of the routing chip PHY is electrically connected to the 9th resistor; the 19th pin of the routing chip PHY is electrically connected to the 8th resistor; one end of the 5th capacitor is electrically connected to the 18th pin of the routing chip PHY, and the other end is electrically connected to the 3rd resistor; one end of the 6th capacitor is electrically connected to the 17th pin of the routing chip PHY, and the other end is electrically connected to the 4th resistor; one end of the 16th resistor is electrically connected to the 15th pin of the routing chip PHY, and the other end is grounded; one end of the 17th resistor is electrically connected to the 16th pin of the routing chip PHY, and the other end... The 18th resistor is electrically connected to the 16th resistor, one end of which is electrically connected to the 16th pin of the routing chip PHY, and the other end is electrically connected to the 5th resistor; the 19th resistor is electrically connected to the 15th pin of the routing chip PHY, and the other end is electrically connected to the 6th resistor; the 20th resistor is electrically connected to the 14th pin of the routing chip PHY, and the other end is electrically connected to the first capacitor; the 21st resistor is electrically connected to the 13th pin of the routing chip PHY, and the other end is electrically connected to the second capacitor; and the 12th pin of the routing chip PHY is electrically connected to the 7th resistor.

4. The signal conversion circuit as described in claim 3, characterized in that, The WAN interface circuit includes a WAN interface, a first common-mode filter, a second common-mode filter, a third common-mode filter, a fourth common-mode filter, a second TVS protection diode, a third TVS protection diode, a fourth TVS protection diode, a fifth TVS protection diode, a sixth TVS protection diode, a seventh TVS protection diode, an eighth TVS protection diode, and a ninth TVS protection diode. The second pin of the first common-mode filter is electrically connected to the eighth pin of the WAN interface, and the third pin of the first common-mode filter is electrically connected to the tenth pin of the routing chip PHY. The first pin of the first common-mode filter is electrically connected to the seventh pin of the WAN interface, and the fourth pin of the first common-mode filter is electrically connected to the ninth pin of the routing chip PHY. One end of the second TVS protection diode is grounded, and the other end is electrically connected to the third pin of the first common-mode filter. One end of the third TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the first common-mode filter. The second pin of the second common-mode filter is electrically connected to the fifth pin of the WAN interface, and the third pin of the second common-mode filter is electrically connected to the seventh pin of the routing chip PHY; the first pin of the second common-mode filter is electrically connected to the fourth pin of the WAN interface, and the fourth pin of the second common-mode filter is electrically connected to the sixth pin of the routing chip PHY; one end of the fourth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the second common-mode filter; one end of the fifth TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the second common-mode filter. The second pin of the third common-mode filter is electrically connected to the sixth pin of the WAN interface, and the third pin of the third common-mode filter is electrically connected to the fifth pin of the routing chip PHY; the first pin of the third common-mode filter is electrically connected to the third pin of the WAN interface, and the fourth pin of the third common-mode filter is electrically connected to the fourth pin of the routing chip PHY; one end of the sixth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the third common-mode filter; one end of the seventh TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the third common-mode filter. The second pin of the fourth common-mode filter is electrically connected to the second pin of the WAN interface, and the third pin of the fourth common-mode filter is electrically connected to the second pin of the routing chip PHY; the first pin of the fourth common-mode filter is electrically connected to the first pin of the WAN interface, and the fourth pin of the fourth common-mode filter is electrically connected to the first pin of the routing chip PHY. One end of the eighth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the fourth common-mode filter. One end of the ninth TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the fourth common-mode filter.

5. The signal conversion circuit as described in claim 2, characterized in that, The SIM card circuit includes a SIM card interface, resistors 22, 23, 24, 25, and 26, capacitors 7, 8, 9, 10, and 11, a TVS protection diode 10, 11, 12, 13, and 14. One end of the 7th capacitor is grounded, and the other end is electrically connected to the first C pin of the SIM card interface. One end of the 8th capacitor is grounded, and the other end is electrically connected to the first C pin of the SIM card interface. One end of the 10th TVS protection diode is grounded, and the other end is electrically connected to the first C pin of the SIM card interface. One end of the 22nd resistor is electrically connected to the second C pin of the SIM card interface, and the other end is electrically connected to the 244th pin of the 5G module signal interface. One end of the 23rd resistor is electrically connected to the third C pin of the SIM card interface, and the other end is electrically connected to the 247th pin of the 5G module signal interface. One end of the 24th resistor is electrically connected to the seventh C pin of the SIM card interface, and the other end is electrically connected to the 5G module signal interface. The 248th pin of the SIM card interface is electrically connected; the CD pin of the SIM card interface is electrically connected to the 249th pin of the 5G module signal interface; one end of the ninth capacitor is grounded and the other end is electrically connected to the 22nd resistor; one end of the tenth capacitor is grounded and the other end is electrically connected to the 23rd resistor; one end of the eleventh capacitor is grounded and the other end is electrically connected to the 24th resistor; one end of the 25th resistor is connected to the eleventh capacitor and the other end is connected to VDD; one end of the 26th resistor is electrically connected to the fourteenth TVS protection diode and the other end is electrically connected to the second resistor; one end of the fourteenth TVS protection diode is electrically connected to the CD pin of the SIM card interface and the other end is grounded; one end of the thirteenth TVS protection diode is grounded and the other end is electrically connected to the seventh C pin of the SIM card interface; one end of the twelfth TVS protection diode is grounded and the other end is electrically connected to the third C pin of the SIM card interface; one end of the eleventh TVS protection diode is grounded and the other end is electrically connected to the second C pin of the SIM card interface; the first, second, third, and fourth pins of the SIM card interface are all grounded.

Images