CN209593381U - Network signal processing circuit - Google Patents

Abstract

The utility model relates to a kind of network signal processing circuits, include: network chip, network connector and is connected to network chip and a plurality of direct current high-pass filtering circuit of network connector, a circuit unit is formed per two adjacent direct current high-pass filtering circuits, is provided with a signal coupling module, two grounded inductors and an electromagnetic shield module on each circuit unit.Network signal processing circuit provided by the utility model, stable signal transmission, electromagnetism interference performance be excellent, long service life.

Description

Network signal processing circuit

technical field

The utility model relates to the technical field of network signal processing, in particular to a network signal processing circuit.

Background technique

With the development of economy and society, the network has covered almost all residential areas and office buildings. The development of the network drives the development of network communication technology. The dependence on the network signal also makes people put forward higher and higher requirements for the transmission speed, transmission efficiency and transmission stability of the network signal. However, most of the existing network signal processing circuits have unstable high-frequency signal transmission and poor anti-lightning performance. , serious electromagnetic interference and other phenomena.

Therefore, a new network signal processing circuit is needed.

Utility model content

In order to solve the shortcomings of the existing technology, the utility model provides a network signal processing circuit, including: a network chip, a network connector and a plurality of DC high-pass filter circuits connected to the network chip and the network connector, each adjacent two The DC high-pass filter circuits form a circuit unit, and each circuit unit is provided with a signal coupling module and two grounding inductances.

Wherein, the signal coupling module includes a group of network transformers and a group of coupling capacitors, wherein the coupling capacitors are arranged in series on each DC high-pass filter circuit, the coupling capacitors are connected in series with the network connector and the network chip, and the network transformers are arranged in parallel on each Between two DC high-pass filter circuits adjacent to each circuit unit.

Wherein, in each group of circuit units, one of the network transformers is connected to the ground terminal through a ground resistor, so that each group of coupling capacitors is indirectly connected to the ground terminal.

Wherein, in each group of circuit units, one of the network transformers is connected to the power supply, so that each group of coupling capacitors is indirectly connected to the ground terminal.

Wherein, the number of the plurality of grounding inductors is the same as the number of DC high-pass filter circuits, each DC high-pass filter circuit is provided with a grounding inductor, one end of the grounding inductor is connected to each DC high-pass filter circuit, and the other end is directly grounded .

Wherein, each circuit unit is also provided with an electromagnetic shielding module, the electromagnetic shielding module includes two anti-electromagnetic interference chips and two anti-electromagnetic interference capacitors, wherein each anti-electromagnetic interference chip is connected in series with each DC high-pass filter Between the network transformer and the network chip on the circuit, two anti-electromagnetic interference capacitors are arranged in parallel between two groups of adjacent DC high-pass filter circuits.

Wherein, the network transformer is electrically connected to each DC high-pass filter circuit through a plurality of terminal pins arranged on the first connection end thereof, and the network chip is electrically connected to each DC high-pass filter circuit through a plurality of chips arranged on the second connection end thereof. The pin realizes electrical connection with each DC high-pass filter circuit.

Wherein, each DC high-pass filter circuit is further provided with a wire-wound resistor in series.

The network signal processing circuit provided by the utility model has stable signal transmission, excellent anti-electromagnetic interference performance and long service life.

Description of drawings

Fig. 1: The logical circuit structure diagram of the network signal processing circuit of the present invention.

Explanation of reference signs

10-network chip, 11-chip pin, 20-network connector, 21-terminal pin;

30-DC high-pass filter circuit, 40-signal coupling module, 50-grounding inductance, 60-electromagnetic shielding module, 70-winding resistor;

41-network transformer, 42-coupling capacitor, 43-resistor, 44-power supply;

61-anti-electromagnetic interference chip, 62-two anti-electromagnetic interference capacitors.

Detailed ways

In order to have a further understanding of the technical solution and beneficial effects of the utility model, the technical solution of the utility model and its beneficial effects will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is the logic circuit structural diagram of the network signal processing circuit of the present utility model, as shown in Fig. 1, the network signal processing circuit provided by the present utility model comprises network chip 10, network connector 20 and is connected to network chip 10 and network A plurality of DC high-pass filter circuits 30 between the connectors 20, the network transformer 20 is electrically connected to each DC high-pass filter circuit 30 through a plurality of terminal pins 21 provided on the first connection end thereof, the The network chip 10 is electrically connected to each DC high-pass filter circuit 30 through a plurality of chip pins 11 provided on the second connection end.

Two adjacent DC high-pass filter circuits 30 form a circuit unit, and each circuit unit is provided with a signal coupling module 40 , two grounding inductors 50 , an electromagnetic shielding module 60 and two wire-wound resistors 70 .

The signal coupling module 40 includes a group of network transformers 41 and a group of coupling capacitors 42, wherein the coupling capacitors 42 are arranged in series on each DC high-pass filter circuit 30, the coupling capacitors 42 are connected in series with the network connector 20 and the network chip 10, and the network transformers 41 is arranged in parallel between two adjacent DC high-pass filter circuits 30 of each circuit unit.

The function of setting the signal coupling module in the utility model is to make up for the deficiency of the network transformer through the characteristic that the impedance of the capacitor is inversely proportional to the signal frequency; specifically, in the circuit, the inductance value of the circuit is proportional to the frequency of the circuit. In the process of signal transmission, the increase of inductive reactance will also increase the attenuation of high-frequency signals, resulting in unstable transmission of network signals and susceptibility to interference; and the charging and discharging effect of capacitors arranged in series on each circuit , which can buffer the increased inductance of the network transformer under the high-frequency network signal. Specifically, the capacitor can isolate the electric field induction to realize signal coupling. The characteristics of the capacitor itself will also improve the coupling effect of the high-frequency signal, and improve the transmission signal of the DC high-pass filter circuit. Speed, to avoid disconnection or slow transmission speed under high-frequency network signals.

In each group of circuit units of the present utility model, one of the network transformers 41 is connected to the ground terminal through a grounding resistance 43, so that each group of coupling capacitors 42 is indirectly connected to the ground terminal. In addition, in each group of circuit units, another network transformer 41 is connected to the ground terminal. The power supply 44 is connected so that each group of coupling capacitors 42 is indirectly connected to the ground terminal. In this way, when there is signal interference such as surge, noise or instantaneous high current and high voltage in the DC high-pass filter circuit, the network transformer 41 can pass through the resistor 43. , noise or instantaneous high current and high voltage signal interference is transmitted to the ground terminal for elimination, further protecting the network transformer 41 and preventing the network transformer 41 from malfunctioning.

Please continue to refer to shown in Figure 1, in the utility model, in order to further protect the network chip 10, the network connector 20 and the network transformer 41, the grounding inductor 50 is set on each DC high-pass filter circuit 30 in addition, the number of multiple grounding inductors 50 The number of DC high-pass filter circuits 30 is the same, and each DC high-pass filter circuit 30 is provided with a grounding inductance 50 , one end of the grounding inductance 50 is connected to each DC high-pass filter circuit 30 , and the other end is directly grounded. When the DC high-pass filter circuit is struck by lightning, the abnormally high voltage generated by the lightning strike will be transmitted to the network connector 20 through various circuit lines, and the first connection terminal electrically connected to the network connector 20 will receive the abnormally high voltage. The ground inductor 50 connects the abnormally high voltage to the ground terminal and removes it, so as to protect the network chip 10 , the network connector 20 and the network transformer 41 to ensure the service life of the network processing circuit.

Please continue to refer to shown in Figure 1, the electromagnetic shielding module 60 of the present utility model includes two anti-electromagnetic interference chips 61 and two anti-electromagnetic interference capacitors 62, wherein each anti-electromagnetic interference chip 61 is connected in series with each DC high-pass filter circuit Between the network transformer 20 on the 30 and the network chip 10 , two anti-electromagnetic interference capacitors 62 are arranged in parallel between two groups of adjacent DC high-pass filter circuits 30 . Moreover, one end of the anti-electromagnetic interference capacitor 62 away from the DC high-pass filter circuit 30 is grounded.

In the utility model, since the signal coupling module 40 capable of coupling high-frequency signals and avoiding signal attenuation is provided, the high-frequency signals on the DC high-pass filter circuit 30 are transmitted to the network chip 10 by the network connector 20 almost as original signals, but the network The signal will generate harmonics of different intensities at different frequencies. If the signal is not attenuated, the signal received by the network chip 10 will cause electromagnetic interference due to the radiation brought by the harmonics. The electromagnetic interference hinders the network chip 10. The normal operation of electronic components or electronic chips leads to its performance degradation; therefore, the setting of the anti-electromagnetic interference chip 61 can absorb the harmonics generated by the medium and high frequencies of the frequency band, and at the same time, the setting of the anti-electromagnetic interference capacitor 62 can absorb the low and medium frequencies of the frequency band The generated harmonics are eliminated through the ground terminal, so as to prevent the harmonics generated by signals of different frequencies from interfering with the network chip 10 and electronic components near the network chip 10 .

In the present invention, it is preferable to set the anti-electromagnetic interference chip 61 as an inductor, and use the characteristics of the inductor to absorb the harmonics generated in the high-frequency stage of the signal.

Please continue to refer to FIG. 1 , in the present invention, each DC high-pass filter circuit 30 is also provided with a wire-wound resistor 70 in series.

When the existing DC high-pass filter circuit is in use, the network connector is connected to the motherboard of the computer through a network cable. Specifically, the DC high-pass filter circuit and the network chip can be directly arranged on the circuit board, and the network connector is arranged on the circuit board. In addition, the network connector is connected to the network chip through the DC high-pass filter circuit; or, the DC high-pass filter circuit can be set on the circuit board in the network connector, and the network chip is connected to the network chip through the connection with the DC high-pass filter circuit. Connector connection; Regardless of the connection method, due to the existence of network cables, network chips, and circuit boards, there will be an unbalanced impedance difference between the network connector and the computer's motherboard, and the unbalanced impedance difference will interfere. Affect the network signal, causing the signal to be unstable and intermittent. Therefore, the utility model arranges wire-wound resistors on each DC high-pass filter circuit to balance the impedance difference between the network connector and the computer motherboard through the existence of the resistors, improve the inductive impedance effect of the processing circuit, and improve the overall impedance of the processing circuit. Integrates with the excessive resistance balance of the network connector to improve the stability of signal transmission.

The beneficial effects of the utility model are as follows:

1. By setting the signal coupling module, it can buffer the increased inductance of the network transformer under high-frequency network signals, and avoid the phenomenon of disconnection or slow transmission speed under high-frequency network signals.

2. By setting the grounding inductance, the abnormally high voltage generated by lightning can be eliminated to ensure the service life of the network processing circuit.

3. By setting the electromagnetic shielding module, it can absorb the harmonics generated by the low frequency and intermediate frequency in the frequency band, and eliminate them through the grounding terminal, so as to avoid the harmonics generated by different frequency signals from interfering with the network chip and electronic components near the network chip.

4. By setting the winding resistance, the existence of resistance balances the impedance difference between the network connector and the computer motherboard, improves the inductive impedance effect of the processing circuit, improves the overall impedance of the processing circuit, and balances with the excessive resistance of the network connector Fusion, improve the stability of signal transmission.

Although the utility model has been described using the above-mentioned preferred embodiments, it is not intended to limit the scope of protection of the utility model, and any person skilled in the art can carry out the above-mentioned embodiment without departing from the spirit and scope of the utility model. Various changes and modifications still belong to the protection scope of the utility model, so the protection scope of the utility model is defined by the claims as the criterion.

Claims (8)

1. A network signal processing circuit, characterized in that it comprises: a network chip, a network connector and a plurality of DC high-pass filter circuits connected to the network chip and the network connector, and every two adjacent DC high-pass filter circuits form a circuit unit , each circuit unit is provided with a signal coupling module and two grounding inductors. 2. The network signal processing circuit as claimed in claim 1, wherein the signal coupling module includes a group of network transformers and a group of coupling capacitors, wherein the coupling capacitors are arranged in series on each DC high-pass filter circuit, coupling The capacitor is connected in series with the network connector and the network chip, and the network transformer is arranged in parallel between two adjacent DC high-pass filter circuits of each circuit unit. 3. The network signal processing circuit according to claim 2, wherein in each group of circuit units, one of the network transformers is connected to the ground terminal through a ground resistor, so that each group of coupling capacitors is indirectly connected to the ground terminal. 4. The network signal processing circuit according to claim 2, wherein in each group of circuit units, one of the network transformers is connected to the power supply, so that each group of coupling capacitors is indirectly connected to the ground terminal. 5. The network signal processing circuit as claimed in claim 1, characterized in that: the number of said plurality of grounding inductors is the same as the number of DC high-pass filter circuits, and each DC high-pass filter circuit is provided with a grounding inductor, grounded One end of the inductor is connected to each DC high-pass filter circuit, and the other end is directly grounded. 6. The network signal processing circuit according to claim 1, characterized in that: each circuit unit is also provided with an electromagnetic shielding module, the electromagnetic shielding module includes two anti-electromagnetic interference chips and two anti-electromagnetic interference capacitors , wherein each anti-electromagnetic interference chip is connected in series between the network transformer and the network chip on each DC high-pass filter circuit, and two anti-electromagnetic interference capacitors are arranged in parallel between two groups of adjacent DC high-pass filter circuits. 7. The network signal processing circuit as claimed in claim 2, characterized in that: said network transformer realizes electrical connection with each DC high-pass filter circuit through a plurality of terminal pins arranged on the first connection end thereof, so The network chip is electrically connected to each DC high-pass filter circuit through a plurality of chip pins provided on the second connection end. 8. The network signal processing circuit according to claim 1, wherein a wire-wound resistor is arranged in series on each DC high-pass filter circuit.