Network signal coupling circuit

Abstract

The invention relates to a network signal coupling circuit. The network signal coupling circuit comprises a plurality of channels which are provided with two circuits respectively; at least one channel is provided with a coupling module in a connecting mode; the coupling module is connected with a first capacitor through the circuit; or two ends of the first capacitor are provided with an equivalent resistor respectively in a parallel connection mode; one end of each of the equivalent resistors is in electricity connection with a signal equivalent ground terminal. According to the network signal coupling circuit, the signal coupling circuit is arranged on a circuit board, coupling is performed on signals transmitted between a network connector and a network chip, the capacitive reactance of capacitors lowers along with the frequency getting higher and accordingly damping of signals is reduced, signal coupling performances of the capacitors get better along with the frequency getting higher and accordingly the network signal coupling circuit is good in network signal coupling effect when being used under a condition with high network frequency, and accordingly purposes of improving the signal coupling effect and the signal transmission effect are achieved.

Description

Technical field [0001] The present invention provides a network signal coupling circuit, especially a signal coupling circuit for coupling signals transmitted between a network connector and a network chip, which is a first capacitor of a coupling module connected to one or more channels , Or the two ends of the first capacitor are respectively connected in parallel with equivalent resistances, and the capacitive reactance decreases and the strength increases as the frequency is higher to enhance the signal coupling effect. Background technique [0002] With the rapid development of computer technology nowadays, desktop computers or notebook computers have been widely used in all corners of the society. The development trend of their computers is also moving towards strong computing functions, high speed and small size. Due to network communication technology It is also developing rapidly, bringing people's life, study, work and leisure into a new realm that is different from the...

AI Technical Summary

Problems solved by technology

[0006] In the above formula, f is the frequency, and the unit is Hertz (Hz); L is the inductance value, and the unit is Henry (H). Since the network connector uses the inductance characteristics of the transformer coil B to isolate electricity and couple signals, so in order To transmit the signal from the primary side to the secondary side, the transformer coil B must have a predetermined inductance value. From the above formula, it can be known that the inductance reactance is proportional to the operating frequency and inductance value, so when the signal frequency increases condition, its inductive reactance will also increase accordingly (see Figure 8 As shown, it is a comparison diagram of the frequency and inductive reactance of a 350μH capacitor), but the increase in inductive reactance will increase the attenuation of the signal, so it will cause the loss of network disconnection or slow network transmission speed, please also refer to Figure 9 As shown in the figure, we can know that when the insertion loss of the transformer is -3db, the frequency response is about 0.45MHz~240MHz, because the insertion loss will increase rapidly when it exceeds, so the operating frequency of the transformer can only be in a certain range. In addition, because the characteristics of transformer coil B are curves formed by low frequency and low intensity, medium frequency and high intensity, and high frequency and low intensity, when the network transmission speed is as high as 1Gbps, it will make the transformer The signal strength of pressure coil B is reduced, and it is difficult to meet the requirements of the product

[0007] Therefore, how to solve the problems and deficiencies of existing transformer coils such as poor quality, high cost, inability to automate production, and reduced strength at high network transmission speeds are the goals that the inventors and those engaged in this industry want to improve.

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