Suppression device

Abstract

The utility model discloses a suppressor which comprises a decoupling resistor, two ends of the decoupling resistor are respectively communicated with one end of a protection device, the other end of one protection device is communicated with an interface a on a protection end, and the other end of the other protection device is communicated with an interface b on an equipment end. The beneficial effects of the utility model are that the decoupling resistor is connected between the two protection devices, when the pulse voltage generated between the signal lines is higher than the starting voltage of the protection devices, the protection devices are changed from a high resistance state to a low resistance state, the pulse voltage is discharged, and meanwhile, decoupling is carried out through the decoupling resistor; therefore, the potential difference of the two protection devices can form current on the decoupling resistor, so that the residual voltage of the protection device at the rear end is reduced, and the equipment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of surge protection, in particular to a suppressor. Background Art

[0002] A high-altitude H explosion will generate a powerful HEMP within a range of several kilometers. In a network communication system, if HEMP protection is not carried out, HEMP will cause irreversible damage to communication equipment. Compared with other surge pulses, HEMP has the characteristics of high pulse amplitude and extremely short pulse rise time.

[0003] Traditional surge protection devices such as voltage-limiting devices like varistors and switching devices like gas discharge tubes have good protection effects when the rise time of the surge waveform is slow (generally, induced lightning strikes have waveforms similar to 8 / 20 μs, 10 / 350 μs) and the subsequent equipment is not sensitive to the residual voltage. However, for the HEMP protection of network communication equipment, due to the rapid rise time of the HEMP pulse (generally in the ns level) and the sensitivity of the subsequent equipment to the residual voltage (generally not higher than dozens of volts), if traditional protection devices such as varistors and gas discharge tubes are used for protection, the protection effect is not good, the residual voltage is very large, and as a switching device, the gas discharge tube will generate very large electromagnetic interference at the moment of startup, so it is not applicable. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a suppressor.

[0005] The purpose of the utility model is realized by the following technical solutions: A suppressor includes a decoupling resistor. The two ends of the decoupling resistor are respectively connected to one end of a protection device. The other end of one protection device is connected to interface a on the protection end, and the other end of the other protection device is connected to interface b on the equipment end.

[0006] Preferably, the protection device includes an ESD and a magnetic ring. One end of the decoupling resistor is connected to one end of the ESD, the other end of the ESD is connected to one end of the magnetic ring, and the other end of the magnetic ring is connected to the corresponding interface a and interface b.

[0007] Preferably, wires are also connected in parallel at both ends of the ESD.

[0008] Preferably, there are eight each of interface a and interface b.

[0009] The utility model has the following advantages: By connecting a decoupling resistor between the two protection devices, when the pulse voltage generated between the signal lines is higher than the starting voltage of the protection device, the protection device changes from a high-resistance state to a low-resistance state to discharge the pulse voltage. At the same time, decoupling is carried out through the decoupling resistor. In this way, the potential difference between the two protection devices will form a current on the decoupling resistor, thereby reducing the residual voltage of the protection device at the rear end, and further protecting the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of the suppressor circuit principle;

[0011] Figure 2 It is a schematic structural diagram of the outside of the suppressor;

[0012] In the figure, 1 - protection end, 2 - equipment end, 3 - interface a, 4 - interface b, 5 - decoupling resistor, 6 - protection device, 7 - ESD, 8 - magnetic ring, 9 - wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] To make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Usually, the components of the embodiments of the utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents the selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the utility model.

[0015] It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0016] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "install", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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 specific situations.

[0019] In this embodiment, as Figure 1 and Figure 2 shown, a suppressor includes a decoupling resistor 5. Both ends of the decoupling resistor 5 are respectively connected to one end of a protection device 6. The other end of one protection device 6 is connected to the interface a3 on the protection end 1, and the other end of the other protection device 6 is connected to the interface b4 on the device end 2. By connecting the decoupling resistor 5 between the two protection devices 6, when the pulse voltage generated between the signal lines is higher than the starting voltage of the protection device 6, the protection device 6 changes from a high-resistance state to a low-resistance state to discharge the pulse voltage. At the same time, decoupling is carried out through the decoupling resistor 5. In this way, the potential difference between the two protection devices 6 will form a current on the decoupling resistor 5, thereby reducing the residual voltage of the protection device 6 at the rear end, and further protecting the device. In this embodiment, the protection device 6 close to the device end 2 is the rear end, and the protection device 6 close to the protection end 1 is the front end.

[0020] Further, the protection device 6 includes an ESD 7 and a magnetic ring 8. One end of the decoupling resistor 5 is connected to one end of the ESD 7, the other end of the ESD 7 is connected to one end of the magnetic ring 8, and the other end of the magnetic ring 8 is connected to the corresponding interface a3 and interface b4. Specifically, after the signal lines are twisted in pairs, they are wound around the magnetic ring 8 for several turns to form an inductor, which inhibits high-frequency pulses. Further, a wire 9 is also connected in parallel at both ends of the ESD 7. Specifically, when the ESD 7 is not activated, the circuit is connected through the wire 9. When the pulse voltage generated between the signal lines is higher than the activation voltage of the ESD 7, the ESD 7 changes from a high-impedance state to a low-impedance state to discharge the pulse voltage. After the pulse surge passes through the front-end ESD 7, there will still be a relatively high residual voltage. Therefore, the residual voltage is further discharged through the back-end ESD 7 to reduce the residual voltage. However, there will be a potential difference between the front-end ESD 7 and the back-end ESD 7. If decoupling is not performed and the two-stage ESD 7s are directly connected in parallel, the voltages of the two-stage ESD 7s will be coupled to each other, resulting in a still relatively high final residual voltage. Therefore, decoupling is performed by connecting a decoupling resistor 5 between the two ESD 7s. In this way, the potential difference between the two ESD 7s will form a current on the decoupling resistor 5, thereby making the residual voltage of the back-end ESD 7 lower. In this embodiment, the decoupling resistor 5 is selected with a low resistance value in the ohm range. Since the characteristic impedance of the gigabit network is 100 Ω, the decoupling resistor 5 has a minimal impact on signal transmission. Four ESD 7s are packaged to form an ESD device. The ESD device is a voltage-limiting type pulse protection device. One device can protect two pairs of signal lines. The gigabit network cable has a total of four pairs of signal lines. Therefore, two ESD devices are required for the front end and the back end respectively, for a total of four ESD devices. The ESD device has the characteristics of fast response speed (can be as low as the ns level) and low parasitic capacitance, so it does not affect the normal transmission of gigabit network signals.

[0021] In this embodiment, both the interface a3 and the interface b4 have eight. Specifically, the interface a3 and the interface b4 adopt an aviation socket and an aviation plug, and each interface a3 is correspondingly connected to an interface b4. An ESD 7, a magnetic ring 8, and a decoupling resistor 5 are provided on each connection line.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A suppressor, characterized in that: It comprises a decoupling resistor (5), wherein two ends of the decoupling resistor (5) are respectively connected to one end of a protection device (6), the other end of one protection device (6) is connected to an interface a (3) on a protection end (1), and the other end of the other protection device (6) is connected to an interface b (4) on a device end (2).

2. The suppressor according to claim 1, characterized in that: The protective device (6) comprises an ESD (7) and a magnetic ring (8), one end of the decoupling resistor (5) is connected to one end of the ESD (7), the other end of the ESD (7) is connected to one end of the magnetic ring (8), and the other end of the magnetic ring (8) is connected to the corresponding interface a (3) and the interface b (4).

3. The suppressor according to claim 2, characterized in that: Both ends of the ESD (7) are also connected in parallel with wires (9).

4. The suppressor according to claim 3, characterized in that: There are eight interfaces a (3) and eight interfaces b (4).

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