Power-off protection circuit for communication module

Abstract

The utility model provides a power-off protection circuit for a communication module. The power-off protection circuit comprises a communication module U1A, a network information module J3, a detection module J2 and a circuit protection module. Wherein the first end of the communication module U1A is connected with the main antenna, the second end of the communication module U1A is connected with the auxiliary antenna, the communication module U1A is used for communication, the network information module J3 is connected with the communication module U1A, the network information module J3 is used for providing network identity information for the communication module U1A, and the detection module J2 is connected with the communication module U1A. The communication module U1A can send a network connection state signal to the detection module J2, the detection module J2 is used for detecting the network connection state of the communication module U1A, the circuit protection module is electrically connected with the communication module U1A, the circuit protection module serves as a standby power supply of the communication module U1A, and when the communication module U1A is powered off, the circuit protection module supplies power to the communication module U1A. The service life of the circuit is prolonged, the failure rate is reduced, and the stability and reliability of the circuit are improved.

Description

Technical Field

[0001] The utility model relates to the field of power-off protection circuits, and more specifically, to a power-off protection circuit for a communication module. Background Art

[0002] Currently, in the prior art, the communication module faces a problem that cannot be ignored during operation: the power supply system that powers it is prone to sudden power outages. This unstable power supply situation not only seriously affects the continuous and stable operation of the communication module, but may also directly damage the internal components of the module, thereby causing communication failures or even equipment scrapping. In order to ensure the reliability and stability of the communication system, it is urgent to take effective measures to optimize the design to prevent irreversible damage to the communication module caused by sudden power outages. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the utility model provides a power-off protection circuit for a communication module.

[0005] In view of this, a first aspect of the utility model provides a power-off protection circuit for a communication module, including: a communication module U1A, a first end of the communication module U1A is connected to the main antenna, a second end of the communication module U1A is connected to the sub-antenna, and the communication module U1A is used for communication; a network information module J3, the network information module J3 is connected to the communication module U1A, and the network information module J3 is used to provide network identity information for the communication module U1A and perform network communication; a detection module J2, the detection module J2 is connected to the communication module U1A, the communication module U1A can send a network connection status signal to the detection module J2, and the detection module J2 is used to detect the network connection status of the communication module U1A; a circuit protection module, the circuit protection module is electrically connected to the communication module U1A, and the circuit protection module serves as a backup power supply for the communication module U1A. When the communication module U1A is powered off, the circuit protection module supplies power to the communication module U1A.

[0006] The present utility model provides a power-off protection circuit for a communication module, which includes a communication module U1A, a network information module J3, a detection module J2, and a circuit protection module. Among them, the first end of the communication module U1A is connected to the main antenna, the second end of the communication module U1A is connected to the secondary antenna, and the communication module U1A is used for communication. The network information module J3 is connected to the communication module U1A and is used to provide network identity information for the communication module U1A. The detection module J2 is connected to the communication module U1A, and the communication module U1A can send a network connection status signal to the detection module J2. The detection module J2 is used to detect the network connection status of the communication module U1A. The circuit protection module is electrically connected to the communication module U1A and serves as the backup power supply of the communication module U1A. When the communication module U1A loses power, the circuit protection module supplies power to the communication module U1A. When a sudden power outage occurs, the circuit protection module supplies power to the communication module U1A, enabling the communication module U1A to complete this shutdown based on the program, so as to avoid irreversible damage to the communication module U1A caused by a sudden power outage, extend the service life of the circuit, reduce the failure rate, and improve the stability and reliability of the circuit.

[0007] In addition, the power-off protection circuit for the communication module U1A in the above technical solution provided by the present utility model may further have the following additional technical features:

[0008] In some technical solutions of the present utility model, optionally, two first power pins USIM_VDD and two second power pins USB_VBUS are provided on the communication module U1A. The first end of the circuit protection module is connected to the power supply, the second end of the circuit protection module is star-connected to the two first power pins USIM_VDD, and the third end of the circuit protection module is star-connected to the two second power pins USB_VBUS.

[0009] In this technical solution, two first power pins USIM_VDD and two second power pins USB_VBUS are provided on the communication module U1A. The first end of the circuit protection module is connected to the power supply, the second end of the circuit protection module is star-connected to the two first power pins USIM_VDD, and the third end of the circuit protection module is connected to the two second power pins USB_VBUS. By connecting the communication module U1A and the circuit protection module in a star connection manner, the overall circuit risk of the system caused by a certain connection failure can be reduced, the fault isolation ability can be enhanced, thereby improving the stability and reliability of the system, and ensuring the independence of the main antenna and the secondary antenna.

[0010] In some technical solutions of the present utility model, optionally, the circuit protection module includes: a first inductance element L1, a first end of the first inductance element L1 is connected to a power supply, a second end of the first inductance element L1 is star-connected to two first battery pins VBAT_RF, and the first inductance element L1 is used to filter power supply interference; a second inductance element L2, a first end of the second inductance element L2 is connected to the power supply, a second end of the second inductance element L2 is star-connected to two second battery pins VBAT_BB, and the second inductance element L2 is used to filter power supply interference.

[0011] In this technical solution, the circuit protection module includes a first inductance element L1 and a second inductance element L2. Among them, a first end of the first inductance element L1 is connected to the power supply, a second end of the first inductance element L1 is star-connected to two first battery pins VBAT_RF, and the first inductance element L1 is used to filter power supply interference. A first end of the second inductance element L2 is connected to the power supply, a second end of the second inductance element L2 is star-connected to two second battery pins VBAT_BB, and the second inductance element L2 is used to filter power supply interference. By filtering the power supply signals transmitted to the communication module U1A through the first inductance element L1 and the second inductance element respectively, high-frequency noise and interference components in the power supply signals can be effectively filtered out, thereby improving the purity and stability of the power supply signals, enhancing their anti-interference ability, and improving the reliability and stability of communication.

[0012] In some technical solutions of the present utility model, optionally, the circuit protection module further includes: a first voltage regulator diode D3, an anode of the first voltage regulator diode D3 is connected to the first inductance element L1, and a cathode of the first voltage regulator diode D3 is connected to the ground electrode; a second voltage regulator diode D2, an anode of the second voltage regulator diode D2 is connected to the second inductance element L2, and a cathode of the first voltage regulator diode D3 is connected to the ground electrode.

[0013] In this technical solution, the circuit protection module further includes a first voltage regulator diode D3 and a second voltage regulator diode D2. An anode of the first voltage regulator diode D3 is connected to the first inductance element L1, a cathode of the first voltage regulator diode D3 is connected to the ground electrode, an anode of the second voltage regulator diode D2 is connected to the second inductance element L2, and a cathode of the first voltage regulator diode D3 is connected to the ground electrode. Through the first voltage regulator diode D3 and the second voltage regulator diode D2, it can be ensured that the communication module U1A obtains a stable working voltage, avoiding abnormal shutdown or module damage caused by power supply voltage fluctuations, protecting the communication module U1A from such damage, extending the service life, and enhancing the reliability and stability of the circuit.

[0014] In some technical solutions of the present utility model, optionally, the circuit protection module further includes: an electrostatic protection diode D1, an anode of the electrostatic protection diode D1 is connected to the power supply, and a cathode of the electrostatic protection diode D1 is connected to the ground electrode.

[0015] In this technical solution, the circuit protection module further includes an electrostatic protection diode D1. The anode of the electrostatic protection diode D1 is connected to the power supply, and the cathode of the electrostatic protection diode D1 is connected to the ground electrode. By directly connecting the electrostatic protection diode D1 to the power supply, the electrostatic protection diode D1 can filter the static electricity transmitted from the power supply, effectively reducing the impact of static electricity on the communication module U1A and other sensitive circuits, ensuring the stability of the signal transmitted from the power supply, and improving the stability and reliability of the circuit. Moreover, by directly connecting the anode of the electrostatic protection diode D1 to the power supply, the same technical effect can be achieved with a small number of components, simplifying the circuit design, reducing the cost, and making the circuit design more flexible and efficient.

[0016] In some technical solutions of the present utility model, optionally, the circuit protection module further includes: a first filter capacitor array, a first end of the first filter capacitor array is connected to the first inductance element L1, and a second end of the first filter capacitor array is connected to the ground electrode; a second filter capacitor array, a first end of the second filter capacitor array is connected to the second inductance element L2, and a second end of the second filter capacitor array is connected to the ground electrode.

[0017] In this technical solution, the circuit protection module further includes a first filter capacitor array and a second filter capacitor array. Among them, a first end of the first filter capacitor array is connected to the first inductance element L1, a second end of the first filter capacitor array is connected to the ground electrode, a first end of the second filter capacitor array is connected to the second inductance element L2, and a second end of the second filter capacitor array is connected to the ground electrode. Through the cooperation of the first filter capacitor array and the first inductance element L1, and the cooperation of the second filter capacitor array and the second inductance element L2, low-pass filtering of the power supply signal is achieved, effectively filtering out these high-frequency noises, making the power supply signal purer, maintaining the stability of the output voltage, and improving the reliability and stability of the circuit. Moreover, when a sudden power outage occurs, the first filter capacitor array and the second filter capacitor array can be used to achieve short-term power supply to the communication module U1A, so that the communication module U1A can complete this shutdown based on the program, avoiding irreversible damage to the communication module U1A due to sudden power outage, protecting the communication module U1A from the current impact at the moment of power outage, preventing damage caused by sudden voltage drop, and improving the reliability and stability of the entire circuit.

[0018] Specifically, the first filter capacitor array includes a first capacitor C14, a second capacitor C18, a third capacitor C19, and a fourth capacitor C20, and the second filter capacitor array includes a fifth capacitor C13, a sixth capacitor C15, a seventh capacitor C16, and an eighth capacitor C17.

[0019] In some technical solutions of the present utility model, optionally, one end of the detection module J2 is connected to the communication status pin NEW_SATAUS of the communication module U1A.

[0020] In this technical solution, one end of the detection module J2 is connected to the communication status pin NEW_SATAUS of the communication module U1A. By connecting the detection module J2 to the communication status pin NEW_SATAUS of the communication module U1A, the communication module U1A can be monitored in real time, which helps to detect communication failures or abnormal situations in a timely manner, ensuring the stable operation of the communication system. At the same time, through the data analysis of the communication status pin NEW_SATAUS, it can assist in fault diagnosis, providing accurate fault information and location for maintenance personnel, and improving the reliability and stability of the circuit.

[0021] In some technical solutions of the present utility model, optionally, the first end of the network information module J3 and the activation end PWRKEY of the communication module U1A are both connected to the controller; the second end of the network information module J3 and the reset end RESET of the communication module U1A are both connected to the controller.

[0022] In this technical solution, the first end of the network information module J3 and the activation end PWRKEY of the communication module U1A are both connected to the controller, and the second end of the network information module J3 and the reset end RESET of the communication module U1A are both connected to the controller. Then, during operation, a signal can be transmitted to the network information module J3 through the activation end PWRKEY to make the network information module J3 start working; a signal can be transmitted to the network information module J3 through the reset end RESET to reset the network information module J3. Through the activation end PWRKEY and the reset end RESET, the flexibility of the circuit is improved.

[0023] In some technical solutions of the present utility model, optionally, the fifth end of the network information module J3 and the first power supply pin USIM_VDD of the communication module U1A are both connected to the controller; the sixth end of the network information module J3 and the reset pin USIM_RST of the communication module U1A are both connected to the controller; the seventh end of the network information module J3 and the clock signal pin USIM_CLK of the communication module U1A are both connected to the controller; the eighth end of the network information module J3 and the serial communication pin USIM_DATA of the communication module U1A are both connected to the controller.

[0024] In this technical solution, the fifth terminal of the network information module J3 and the first power supply pin USIM_VDD of the communication module U1A are both connected to the controller. The sixth terminal of the network information module J3 and the reset pin USIM_RST of the communication module U1A are both connected to the controller. The seventh terminal of the network information module J3 and the clock signal pin USIM_CLK of the communication module U1A are both connected to the controller. The eighth terminal of the network information module J3 and the serial communication pin USIM_DATA of the communication module U1A are both connected to the controller. Through the above connections to the controller, the identity information of the network information module J3 can be transmitted to the communication module U1A, thereby enabling the communication module U1A to perform network communication, enhancing the scalability of the system and the user experience.

[0025] In some technical solutions of the present utility model, optionally, the ninth terminal of the network information module J3 and the positive data signal pin USB+ P of the communication module U1A are both connected to the controller; the tenth terminal of the network information module J3 and the negative data signal pin USB- N of the communication module U1A are both connected to the controller; the eleventh terminal of the network information module J3 and the second power supply pin USB_VBUS of the communication module U1A are both connected to the controller.

[0026] In this technical solution, the ninth terminal of the network information module J3 and the positive data signal pin USB+ P of the communication module U1A are both connected to the controller; the tenth terminal of the network information module J3 and the negative data signal pin USB- N of the communication module U1A are both connected to the controller, and the eleventh terminal of the network information module J3 and the second power supply pin USB_VBUS of the communication module U1A are both connected to the controller. Through the positive data signal pin USB+ P and the negative data signal pin USB- N, data upload and download can be performed, improving the stability and reliability of data transmission. Through this connection method, the network information module J3 can transmit data to the communication module U1A in the form of differential signals, realizing efficient and accurate data exchange.

[0027] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0028] The above and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0029] Figure 1 Figure 1 shows one of the schematic diagrams of a power-off protection circuit for a communication module according to an embodiment of the present utility model;

[0030] Figure 2Shows one of the schematic diagrams of a power-off protection circuit for a communication module according to an embodiment of the present invention;

[0031] Figure 3 Shows the schematic diagram of a communication module according to an embodiment of the present invention;

[0032] Figure 4 Shows the schematic diagram of a circuit protection module according to an embodiment of the present invention;

[0033] Figure 5 Shows the schematic diagram of a network information module according to an embodiment of the present invention;

[0034] Figure 6 Shows the schematic diagram of a detection module according to an embodiment of the present invention. Detailed implementation manners

[0035] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0036] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0037] Next, refer to Figures 1 to 6 Describe a power-off protection circuit for a communication module according to some embodiments of the present invention.

[0038] In an embodiment of the present invention, as Figure 1 and Figure 2 shown, a power-off protection circuit for a communication module is proposed, including: a communication module U1A, the first end of the communication module U1A is connected to the main antenna, the second end of the communication module U1A is connected to the sub-antenna, and the communication module U1A is used for communication; a network information module J3, the network information module J3 is connected to the communication module U1A, and the network information module J3 is used to provide network identity information for the communication module U1A; a detection module J2, the detection module J2 is connected to the communication module U1A, the communication module U1A can send a network connection status signal to the detection module J2, and the detection module J2 is used to detect the network connection status of the communication module U1A; a circuit protection module, the circuit protection module is electrically connected to the communication module U1A, and the circuit protection module serves as a backup power supply for the communication module U1A. When the communication module U1A loses power, the circuit protection module supplies power to the communication module U1A.

[0039] The present utility model proposes a power-off protection circuit for a communication module, comprising: a communication module U1A, a network information module J3, a detection module J2, and a circuit protection module. Among them, the first end of the communication module U1A is connected to the main antenna, the second end of the communication module U1A is connected to the secondary antenna, the communication module U1A is used for communication, the network information module J3 is connected to the communication module U1A, the network information module J3 is used to provide network identity information for the communication module U1A, the detection module J2 is connected to the communication module U1A, the communication module U1A can send a network connection status signal to the detection module J2, the detection module J2 is used to detect the network connection status of the communication module U1A, the circuit protection module is electrically connected to the communication module U1A, and the circuit protection module serves as a backup power supply for the communication module U1A. When the communication module U1A loses power, the circuit protection module supplies power to the communication module U1A. When a sudden power outage occurs, the circuit protection module supplies power to the communication module U1A, so that the communication module U1A can complete this shutdown based on the program, avoiding irreversible damage to the communication module U1A caused by a sudden power outage, extending the service life of the circuit, reducing the failure rate, and improving the stability and reliability of the circuit.

[0040] Preferably, the communication module U1A is used in the field of 4G (the 4th Generation mobile communication technology) or on a vehicle-mounted terminal.

[0041] Further, in some embodiments of the present utility model, there are two first power pins USIM_VDD and two second power pins USB_VBUS on the communication module U1A. The first end of the circuit protection module is connected to the power supply, the second end of the circuit protection module is star-connected to the two first power pins USIM_VDD, and the third end of the circuit protection module is star-connected to the two second power pins USB_VBUS.

[0042] In this embodiment, there are two first power pins USIM_VDD and two second power pins USB_VBUS on the communication module U1A. The first end of the circuit protection module is connected to the power supply, the second end of the circuit protection module is star-connected to the two first power pins USIM_VDD, and the third end of the circuit protection module is connected to the two second power pins USB_VBUS. By connecting the communication module U1A and the circuit protection module in a star connection manner, the overall circuit risk of the system caused by a certain connection failure can be reduced, the fault isolation ability can be enhanced, thereby improving the stability and reliability of the system, and ensuring the independence of the main antenna and the secondary antenna.

[0043] Further, in some embodiments of the present utility model, such as Figure 3 andFigure 4 As shown, the circuit protection module includes: a first inductance element L1, the first end of the first inductance element L1 is connected to a power supply, the second end of the first inductance element L1 is star-connected to two first battery pins VBAT_RF, and the first inductance element L1 is used to filter the power supply signal; a second inductance element L2, the first end of the second inductance element L2 is connected to the power supply, the second end of the second inductance element L2 is star-connected to two second battery pins VBAT_BB, and the second inductance element L2 is used to filter the power supply signal.

[0044] In this embodiment, the circuit protection module includes: a first inductance element L1 and a second inductance element L2. Among them, the first end of the first inductance element L1 is connected to the power supply, the second end of the first inductance element L1 is star-connected to two first battery pins VBAT_RF, the first inductance element L1 is used to filter the power supply signal, the first end of the second inductance element L2 is connected to the power supply, the second end of the second inductance element L2 is star-connected to two second battery pins VBAT_BB, and the second inductance element L2 is used to filter the power supply signal. By filtering the power supply signals transmitted to the communication module U1A through the first inductance element L1 and the second inductance element respectively, the high-frequency noise and interference components in the power supply signal can be effectively filtered out, thereby improving the purity and stability of the power supply signal, enhancing its anti-interference ability, and improving the reliability and stability of communication.

[0045] Furthermore, in some embodiments of the present utility model, the circuit protection module further includes: a first voltage regulator diode D3, the anode of the first voltage regulator diode D3 is connected to the first inductance element L1, and the cathode of the first voltage regulator diode D3 is connected to the ground; a second voltage regulator diode D2, the anode of the second voltage regulator diode D2 is connected to the second inductance element L2, and the cathode of the first voltage regulator diode D3 is connected to the ground.

[0046] In this embodiment, the circuit protection module further includes a first voltage regulator diode D3 and a second voltage regulator diode D2. The anode of the first voltage regulator diode D3 is connected to the first inductance element L1, the cathode of the first voltage regulator diode D3 is connected to the ground, the anode of the second voltage regulator diode D2 is connected to the second inductance element L2, and the cathode of the first voltage regulator diode D3 is connected to the ground. Through the first voltage regulator diode D3 and the second voltage regulator diode D2, it can be ensured that the communication module U1A obtains a stable operating voltage, avoiding abnormal shutdown or module damage caused by power supply voltage fluctuations, protecting the communication module U1A from such damage, extending the service life, and enhancing the reliability and stability of the circuit.

[0047] Furthermore, in some embodiments of the present utility model, the circuit protection module further includes: an electrostatic protection diode D1, the anode of the electrostatic protection diode D1 is connected to the power supply, and the cathode of the electrostatic protection diode D1 is connected to the ground.

[0048] In this embodiment, the circuit protection module further includes an electrostatic protection diode D1. The anode of the electrostatic protection diode D1 is connected to the power supply, and the cathode of the electrostatic protection diode D1 is connected to the ground electrode. By directly connecting the electrostatic protection diode D1 to the power supply, the electrostatic protection diode D1 can filter the static electricity transmitted from the power supply, effectively reducing the impact of static electricity on the communication module U1A and other sensitive circuits, ensuring the stability of the signal transmitted from the power supply, and improving the stability and reliability of the circuit. Moreover, by directly connecting the anode of the electrostatic protection diode D1 to the power supply, the same technical effect can be achieved with a small number of components, simplifying the circuit design, reducing the cost, and making the circuit design more flexible and efficient.

[0049] Further, in some embodiments of the present invention, the circuit protection module further includes: a first filter capacitor array, the first end of the first filter capacitor array is connected to the first inductive element L1, and the second end of the first filter capacitor array is connected to the ground electrode; a second filter capacitor array, the first end of the second filter capacitor array is connected to the second inductive element L2, and the second end of the second filter capacitor array is connected to the ground electrode.

[0050] In this embodiment, the circuit protection module further includes a first filter capacitor array and a second filter capacitor array. Among them, the first end of the first filter capacitor array is connected to the first inductive element L1, the second end of the first filter capacitor array is connected to the ground electrode, the first end of the second filter capacitor array is connected to the second inductive element L2, and the second end of the second filter capacitor array is connected to the ground electrode. Through the cooperation of the first filter capacitor array and the first inductive element L1, and the cooperation of the second filter capacitor array and the second inductive element L2, low-pass filtering of the power supply signal is achieved, effectively filtering out these high-frequency noises, making the power supply signal purer, maintaining the stability of the output voltage, and improving the reliability and stability of the circuit. Moreover, when a sudden power failure occurs, the first filter capacitor array and the second filter capacitor array can be used to provide short-term power supply to the communication module U1A, so that the communication module U1A can complete this shutdown based on the program, avoiding irreversible damage to the communication module U1A due to sudden power failure of the power supply, protecting the communication module U1A from the current impact at the moment of power failure, preventing damage caused by sudden voltage drop, and improving the reliability and stability of the entire circuit.

[0051] It should be understood that when the main power supply is powered off, the first filter capacitor array and the second filter capacitor array can provide short-term power supply to the communication module. When the communication module recognizes that it is not powered by the main power supply, it will execute the shutdown command, thereby achieving safe power-off.

[0052] Specifically, the first filter capacitor array includes a first capacitor C14, a second capacitor C18, a third capacitor C19, and a fourth capacitor C20, and the second filter capacitor array includes a fifth capacitor C13, a sixth capacitor C15, a seventh capacitor C16, and an eighth capacitor C17.

[0053] Further, in some embodiments of the present utility model, as Figure 6 shown, one end of the detection module J2 is connected to the communication status pin NEW_SATAUS of the communication module U1A.

[0054] In this embodiment, one end of the detection module J2 is connected to the communication status pin NEW_SATAUS of the communication module U1A. By connecting the detection module J2 to the communication status pin NEW_SATAUS of the communication module U1A, the communication module U1A can be monitored in real time, which helps to detect communication failures or abnormal conditions in a timely manner, ensuring the stable operation of the communication system. At the same time, through the data analysis of the communication status pin NEW_SATAUS, it can assist in fault diagnosis, providing accurate fault information and location for maintenance personnel, and improving the reliability and stability of the circuit.

[0055] Further, in some embodiments of the present utility model, as Figure 5 shown, the first end of the network information module J3 and the activation end PWRKEY of the communication module U1A are both connected to the controller; the second end of the network information module J3 and the reset end RESET of the communication module U1A are both connected to the controller.

[0056] In this embodiment, the first end of the network information module J3 and the activation end PWRKEY of the communication module U1A are both connected to the controller, and the second end of the network information module J3 and the reset end RESET of the communication module U1A are both connected to the controller. Then, during operation, the controller can transmit signals to the network information module J3 through the activation end PWRKEY to make the communication module U1A and the network information module J3 start working; the controller can reset the communication module U1A and the network information module J3 by transmitting signals to the reset end RESET and the network information module J3. Through the activation end PWRKEY and the reset end RESET, the flexibility of the circuit is improved.

[0057] Further, in some embodiments of the present utility model, the fifth end of the network information module J3 and the first power supply pin USIM_VDD of the communication module U1A are both connected to the controller; the sixth end of the network information module J3 and the reset pin USIM_RST of the communication module U1A are both connected to the controller; the seventh end of the network information module J3 and the clock signal pin USIM_CLK of the communication module U1A are both connected to the controller; the eighth end of the network information module J3 and the serial communication pin USIM_DATA of the communication module U1A are both connected to the controller.

[0058] In this embodiment, the fifth terminal of the network information module J3 and the first power supply pin USIM_VDD of the communication module U1A are both connected to the controller. The sixth terminal of the network information module J3 and the reset pin USIM_RST of the communication module U1A are both connected to the controller. The seventh terminal of the network information module J3 and the clock signal pin USIM_CLK of the communication module U1A are both connected to the controller. The eighth terminal of the network information module J3 and the serial communication pin USIM_DATA of the communication module U1A are both connected to the controller. By connecting to the controller through the above pins, the controller can send instructions to the network information module J3 and the communication module U1A, and then transfer the identity information of the network information module J3 to the communication module U1A, so as to perform network communication, enhancing the scalability of the system and the user experience.

[0059] Further, in some embodiments of the present invention, the ninth terminal of the network information module J3 and the data positive signal pin USB+P of the communication module U1A are both connected to the controller; the tenth terminal of the network information module J3 and the data negative signal pin USB-N of the communication module U1A are both connected to the controller; the eleventh terminal of the network information module J3 and the second power supply pin USB_VBUS of the communication module U1A are both connected to the controller.

[0060] In this embodiment, the ninth terminal of the network information module J3 and the data positive signal pin USB+P of the communication module U1A are both connected to the controller; the tenth terminal of the network information module J3 and the data negative signal pin USB-N of the communication module U1A are both connected to the controller, and the eleventh terminal of the network information module J3 and the second power supply pin USB_VBUS of the communication module U1A are both connected to the controller. Through the data positive signal pin USB+P and the data negative signal pin USB-N, based on the instruction, the controller enables the network information module J3 to upload and download data, improving the stability and reliability of data transmission. Through this connection method, the network information module J3 can transmit data to the communication module U1A in the form of differential signals, realizing efficient and accurate data exchange.

[0061] In the claims, the description and the drawings of the present utility model, the term "a plurality of" means two or more, unless otherwise explicitly defined. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. This is only for more conveniently describing the present utility model and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in the specific orientation. Therefore, these descriptions should not be construed as limitations on the present utility model; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances of the above data.

[0062] In the claims, the description and the drawings of the present utility model, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the claims, the description and the drawings of the present utility model, the schematic expression of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0063] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A power-off protection circuit for a communication module, characterized in that, Comprising: A communication module U1A, the first end of the communication module U1A is connected to the main antenna, the second end of the communication module U1A is connected to the sub-antenna, and the communication module U1A is used for communication; A network information module J3, the network information module J3 is connected to the communication module U1A, and the network information module J3 is used to provide network identity information for the communication module U1A and perform network communication; A detection module J2, the detection module J2 is connected to the communication module U1A, the communication module U1A can send a network connection status signal to the detection module J2, and the detection module J2 is used to detect the network connection status of the communication module U1A; A circuit protection module, the circuit protection module is electrically connected to the communication module U1A, the circuit protection module serves as a backup power supply for the communication module U1A, and when the communication module U1A is powered off, the circuit protection module supplies power to the communication module U1A.

2. The power-off protection circuit for a communication module according to claim 1, characterized in that There are two first battery pins VBAT_RF and two second battery pins VBAT_BB on the communication module U1A, the first end of the circuit protection module is connected to the power supply, the second end of the circuit protection module is star-connected to the two first battery pins VBAT_RF, and the third end of the circuit protection module is star-connected to the two second battery pins VBAT_BB.

3. The power-off protection circuit for a communication module according to claim 2, wherein, The circuit protection module includes: A first inductance element L1, the first end of the first inductance element L1 is connected to the power supply, the second end of the first inductance element L1 is star-connected to the two first battery pins VBAT_RF, and the first inductance element L1 is used to filter power interference; A second inductance element L2, the first end of the second inductance element L2 is connected to the power supply, the second end of the second inductance element L2 is star-connected to the two second battery pins VBAT_BB, and the second inductance element L2 is used to filter power interference.

4. The power-off protection circuit for a communication module according to claim 3, characterized in that, The circuit protection module further includes: A first voltage regulator diode D3, the anode of the first voltage regulator diode D3 is connected to the first inductance element L1, and the cathode of the first voltage regulator diode D3 is connected to the ground; A second voltage regulator diode D2, the anode of the second voltage regulator diode D2 is connected to the second inductance element L2, and the cathode of the first voltage regulator diode D3 is connected to the ground.

5. The power-off protection circuit for a communication module according to claim 4, characterized in that The circuit protection module further includes: An electrostatic protection diode D1, the anode of the electrostatic protection diode D1 is connected to the power supply, and the cathode of the electrostatic protection diode D1 is connected to the ground.

6. The power-off protection circuit for a communication module according to claim 5, wherein, The circuit protection module further includes: A first filter capacitor array, the first end of the first filter capacitor array is connected to the first inductance element L1, and the second end of the first filter capacitor array is connected to the ground; A second filter capacitor array, the first end of the second filter capacitor array is connected to the second inductance element L2, and the second end of the second filter capacitor array is connected to the ground.

7. The power-off protection circuit for a communication module according to claim 1, wherein one end of the detection module J2 is connected to the communication status pin NEW_SATAUS of the communication module U1A.

8. The power-off protection circuit for a communication module according to claim 1, wherein the first end of the network information module J3 and the activation end PWRKEY of the communication module U1A are both connected to the controller; the second end of the network information module J3 and the reset end RESET of the communication module U1A are both connected to the controller.

9. The power-off protection circuit for a communication module according to claim 8, wherein the fifth end of the network information module J3 and the first power supply pin USIM_VDD of the communication module U1A are both connected to the controller; the sixth end of the network information module J3 and the reset pin USIM_RST of the communication module U1A are both connected to the controller; the seventh end of the network information module J3 and the clock signal pin USIM_CLK of the communication module U1A are both connected to the controller; the eighth end of the network information module J3 and the serial communication pin USIM_DATA of the communication module U1A are both connected to the controller.

10. The power-off protection circuit for a communication module according to claim 9, wherein the ninth end of the network information module J3 and the data positive signal pin USB+P of the communication module U1A are both connected to the controller; the tenth end of the network information module J3 and the data negative signal pin USB-N of the communication module U1A are both connected to the controller; the eleventh end of the network information module J3 and the second power supply pin USB_VBUS of the communication module U1A are both connected to the controller.

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