Network signal coupling circuit

Abstract

The present invention relates to a network signal coupling circuit, which is arranged on a circuit board and is a signal coupling circuit for coupling signals transmitted between a network connector and a network chip. The signal coupling circuit is provided with a plurality of channels respectively having two circuits , one or more channels are connected with a coupling module, and the coupling module is connected with a first capacitor in a circuit, or an equivalent resistance is connected in parallel at the two ends of the first capacitor, and then the other end of each equivalent resistance is electrically connected Connected to the signal equivalent ground terminal, the capacitive reactance will decrease with the higher the frequency, so that the attenuation of the signal will also become smaller, and the characteristics of the capacitive signal coupling will be better with the higher the frequency, so that the network The signal coupling circuit still has a good network signal coupling effect when used at a high network frequency, thereby achieving the purpose of improving signal coupling and transmission effects.

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 connected to one or more channels with the first capacitor of the coupling module , or equivalent resistors are respectively connected in parallel at the two ends of the first capacitor, and the characteristics of capacitive reactance decrease and strength increase when the frequency is higher, so as to improve the signal coupling effect. Background technique [0002] With the rapid development of today's computer technology, desktop computers or notebook computers have generally existed in every corner of society, and the computer development trend is also moving towards the direction of powerful computing functions, fast speed and small size. Due to network communication technology It is also developing rapidly and bringing people's life, study, work and leisur...

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 the electricity and couple the signal, 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 chart of the frequency and inductive reactance of a 350μH capacitor), but the increase in inductive reactance will increase the attenuation of the signal, so there will be a loss of network disconnection or slow network transmission speed, please also refer to Figure 9 It can be seen from the figure 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 working frequency of the transformer can only be in a certain 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 the 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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