KR20130006133U - Network signal coupling circuit - Google Patents

Abstract

The present invention relates to a network signal coupling circuit, comprising a coupling module installed on a circuit board, electrically connected between a network on-chip and a network connector, and installed in each two-wire channel, each coupling module. Is a first and a second capacitor connected in series to the two wires of each of the two-wire channels, respectively; first and second corresponding resistors connected in parallel to the first and second capacitors on one side, and the first on the opposite side. Third and fourth corresponding resistors connected in parallel to the first and second capacitors, and two signal grounds connected to opposite ends of the first and second corresponding resistors and opposite ends of the third and fourth corresponding resistors, respectively. Due to the characteristics of the terminal, and the strength of the capacitor increases with increasing frequency, the signal connection capability of the network signal coupling circuit may increase the applied network frequency. When it rises considerably.

Description

Network Signal Coupling Circuits {NETWORK SIGNAL COUPLING CIRCUIT}

The present invention relates to a network technology, and more particularly, to a network signal coupling circuit using a coupling module for improving signal coupling performance according to a characteristic of a capacitor whose strength increases as frequency increases.

Due to the rapid development of computer technology, desk computers and notebook computers have been developed and widely used in various fields. It is a market trend to provide computers with faster operating speeds and smaller sizes. Moreover, network communication technology brings people closer together and helps gather information about life, learning, work and hobbies. By network communication, people communicate with each other to send information, advertisements or emails in real time. Moreover, over the Internet, people collect information, send messages, or play online video games. Advances in computer technology make the relationship between people and the network firm and integral.

Connecting a computer or electronic device to a network for data transmission may be by cable connection technology or wireless transmission protocol. Cabling technology requires the installation of network connectors. Conventional network connectors incorporate a transformer module and a common mode suppression module. As shown in FIG. 5, the conventional network connector is composed of a circuit board A, multiple transformer coils B, and a filter coil C installed on the circuit board A. FIG. Each transformer coil (B) and filter coil (C) consists of a wire core (D), a lead wire (D1) wound around the wire core (D) with ends bonded to respective terminals on the circuit board (A). do. Since the winding of the transformer coil B and the filter coil C cannot be achieved by an automatic device and must be made by labor, the assembly efficiency of this kind of network connector becomes low. Moreover, the lead wire can easily break during winding, thereby increasing the cost. Moreover, the assembly by labor cannot precisely control the coil winding binding force and the number of windings, which affects the quality stability of production.

Moreover, with the development of network application technologies, network data transfer rates have increased significantly. To meet the demands of high data rates, network transmission speeds have increased from 10Mbps to 100Mbps or 1Gbps. Today, fiber optic network transmission rates can be high speeds of 10 Gbps and above. The transformer coil B is an inductor, the impedance Z of the inductor is an inductive reactance, and the unit is ohms. Inductive reactance is Z = 2π * f * L), where f is frequency, unit is hertz (Hz), L is inductance of inductor, and unit is Henry (H). The above-described network connector uses the characteristics of the inductance of the transformer coil B to electrically isolate and connect a signal. In order to transmit a signal from the first side to the second side, each transformer coil B must have a preset inductance. By the above equation, the inductive reactance is directly proportional to the inductance and working frequency of the inductor. As the signal frequency increases, the inductive reactance will increase significantly (see the inductive reactance and frequency comparison curves for the 350 μH capacitor shown in FIG. 6). However, increased inductive reactance increases signal dilution and causes a short circuit or a significant drop in network transmission speed. As shown in Fig. 7, when the insertion loss of the transformer reaches -3db, the reaction frequency is 0.45MHz to 240MHz. Beyond this range, insertion loss will increase considerably quickly. Therefore, the working frequency must be controlled within a fairly narrow bandwidth. Moreover, due to the characteristic curve of the low frequency with low intensity, the medium frequency with high intensity and the high frequency with high intensity transformer coil B, when the network transmission speed reaches 1 Gbps, the signal strength of the transformer coil B is Will be lowered and will not be able to meet product needs.

Therefore, there is a strong demand for a network signal coupling circuit that can overcome the shortcomings of low signal strength under unstable quality, high cost, non-automated production and high speed network transmission of conventional network connector designs.

The present invention is to overcome the above-mentioned conventional problems, an object of the present invention is to couple the network signal using a coupling module to improve the performance of the signal coupling according to the characteristics of the capacitor of increasing strength when the frequency increases To provide a ring circuit.

As an example of a network signal coupling circuit according to the present invention, it is installed on a circuit board and is electrically connected between a network on chip and a network connector. The network signal coupling circuit includes a coupling module installed in each two-wire channel. Each coupling module is electrically connected in parallel to the first capacitor and the second capacitor in the vicinity of the second connection end, the first capacitor and the second capacitor respectively connected in series to the two wires of the respective two-wire channel. A first corresponding resistor and a second corresponding resistor to be connected, a third corresponding resistor and a fourth corresponding resistor electrically connected in parallel to the first capacitor and the second capacitor in the vicinity of the first connection end, and the first corresponding resistor and And two signal ground terminals electrically connected to opposite ends of the second corresponding resistor and opposite ends of the third and fourth corresponding resistors, respectively. Due to the characteristic that the strength of the capacitor rises with increasing frequency, the signal connection capability of the network signal coupling circuit increases considerably as the applied network frequency rises.

Furthermore, in each of the two connected corresponding resistors and the circuit of each two wire channel, the capacitor constitutes each [pi] loop. This circuit design uses common electronic components that can be bonded directly to the circuit board by an automatic machine without wire winding by the operator.

In practical application, the present invention has the following advantages and features:

1. The network signal coupling circuit 1 is electrically connected between a plurality of two-wire channels 12, a first connection end 10 and a second connection end 11 of the network signal coupling circuit 1. Filter module 13 installed in each two-wire channel 12, and in each two-wire channel 12 between the filter module 13 and the second connection end 11 of the network signal coupling circuit 1; A coupling capacitor 14 installed, each coupling module 14 having a first capacitor 141 and a second capacitor electrically connected in series to the two wires of each two-wire channel 12, respectively. 142 and a first corresponding resistor 143 and a second corresponding resistor 144 electrically connected in parallel to the first capacitor 141 and the second capacitor 142 in the vicinity of the second connection terminal 11. And a third corresponding resistor 145 and a third electrically connected in parallel with the first capacitor 141 and the second capacitor 142 in the vicinity of the first connection terminal 10. Electrically connected to the fourth corresponding resistor 146 and the other end of the third corresponding resistor 145 and the fourth corresponding resistor 146 and the other ends of the first corresponding resistor 143 and the second corresponding resistor 144, respectively. Consisting of two signal ground terminals 147; Due to the characteristic that the strength of the capacitor rises with increasing frequency, the signal connection capability of the network signal coupling circuit 1 increases considerably when the applied network frequency increases.

2. The capacitors of each coupling module 14 in each of the two connected corresponding resistors and in each wire of each two wire channel 12 constitute a respective π loop. This circuit design uses electronic components that can be bonded directly to the circuit board by an automatic machine without wire winding by the operator.

In conclusion, the present invention is installed in a plurality of two-wire channels 12 and two-wire channels 12, respectively, between the first connection end 10 and the second connection end 11 of the network signal coupling circuit 1. A coupling module 14 installed respectively in the two-wire channel 12 between the filter module 13 electrically connected to the filter module 13 and the second connection end 11 and the filter module 13 of the network signal coupling circuit 1. And a network signal coupling circuit 1, each coupling module 14 having a first capacitor 141 electrically connected in series to each of the two wires of each two-wire channel 12, respectively. ) And a first corresponding resistor 143 and a second electrically connected in parallel to the first capacitor 141 and the second capacitor 142 in the vicinity of the second capacitor 142 and the second connection terminal 11. Electrically connected in parallel to the first capacitor 141 and the second capacitor 142 near the corresponding resistor 144, the first connection terminal 10. Third and fourth counterparts 145 and 146, and other ends of the third and fourth counterparts 145 and 146, and the first and second counterparts 143 and 144. And two signal ground terminals 147, each electrically connected to the other end of the < RTI ID = 0.0 > Furthermore, the capacitors of each coupling module 14 in each of the two connected corresponding resistors and in each wire of each of the two wire channels 12 constitute a respective? Loop. Due to the characteristic that the strength of the capacitor rises with increasing frequency, the signal connection capability of the network signal coupling circuit 1 increases considerably when the applied network frequency increases.

1 is a block diagram of the present invention
2 is a circuit diagram of a network signal coupling circuit according to the present invention;
3 is a comparative curve of capacitive reactance and frequency of the present invention
4 is a block diagram of another example of the present invention.
5 is an exemplary view of a filter coil and a transformer coil on a circuit board according to the prior art.
6 is a comparative curve diagram of inductive reactance and frequency of a prior art design;
7 is a frequency response curve of a conventional transformer

1, 2 and 3, a block diagram, a circuit diagram of a network signal coupling circuit, and a comparison chart of capacitive reactance and frequency of the present invention are shown. As shown, the network signal coupling circuit 1 is provided on the circuit board 4 and has two opposing ends electrically connected to the network connector 2 and the network on chip 3, respectively. The network signal coupling circuit 1 includes a first connection end 10 electrically connected to the network connector 2, a second connection end 11 electrically connected to the network on-chip 3, and a first connection end ( The first and second connection ends 10 and 11 are respectively provided in the plurality of two-wire channels 12 and the two-wire channels 12 electrically connected between the second connection end 11 and the second connection end 11. A plurality of filter modules 13 electrically connected to each other, and a plurality of coupling modules respectively installed in the two-wire channel 12 and electrically connected between the filter module 13 and the second connection end 11. 14). Each two-wire channel 12 consists of two wires. Each filter module 13 consists of a first coil 131 and a second coil 132 that are each electrically connected in series to the two wires of each two-wire channel 12. Each coupling module 14 is adjacent to a first capacitor 141, a second capacitor 142, and a second connection terminal 11, each electrically connected to two wires of each two-wire channel 12. Where the first corresponding resistor 143 and the second corresponding resistor 144, which are electrically connected in parallel to the first capacitor 141 and the second capacitor 142, in the vicinity of the first connecting terminal 10. A third corresponding resistor 145 and a fourth corresponding resistor 146 electrically connected to the first capacitor 141 and the second capacitor 142 in parallel, and a third corresponding resistor 145 and a fourth corresponding resistor 146 And two signal ground terminals 147 that are electrically connected to the other end of each of < RTI ID = 0.0 >) < / RTI >

The first coil 131 and the second coil 132 of each filter module 13, which are each connected to two wires of each two-wire channel 12, are arranged in order to filter the signal. The signal ground terminal 147 electrically connected to the third corresponding resistor 145 and the fourth corresponding resistor 146 of the coupling module 14 near the first connection terminal 10 is a ground terminal 1471. to be. The signal ground terminal 147 electrically connected to the first corresponding resistor 143 and the second corresponding resistor 144 of the coupling module 14 near the second connection terminal 11 is a power source 1472. .

The first connection end 10 and the second connection end 11 of the network signal coupling circuit 1 are electrically connected to the conductive pins of the network connector 2 and the conductive pins of the network on chip 3, respectively. The circuit of the two wire channel 12 of the signal coupling circuit 1 is MD0 + / MX0 +; MD0- / MX0-; MD1 + / MX1 +; MD1- / MX1-; MD2 + / MX2 +; MD2- / MX2-; MD3 + / MX3 +; It is indicated to be MD3- / MX3-RK. However, this display form can be changed to meet other design requirements.

Moreover, the capacitors (first corresponding resistor 143 and third corresponding resistor 145) of each coupling module 14 in each of the two connected corresponding resistors and in each wire of each of the two wire channels 12. The first capacitor 141 having a second capacitor 142 or the second capacitor 142 having the second corresponding resistor 144 and the fourth corresponding resistor 146 constitutes a π loop. Two π loops in each two-wire channel 12 are symmetrical. By using a capacitor to connect two parallel corresponding resistors and two circuits at the ends of the capacitor to achieve impedance matching, the network signal coupling circuit can meet different specification requirements. After matching, the first capacitor 141 and the second capacitor 142 are 0.1 μfarad; The first corresponding resistor 141 and the second corresponding resistor 144 located adjacent to the network on chip 3 are 49.9? The third corresponding resistor 145 and the fourth corresponding resistor 146 located adjacent to the network connector 2 are 75 Ω; The impedance (Z) of a capacitor is a capacitive reactance in ohms. The capacitive reactance is measured by the formula Z = 1/2 (2π * f * C) where f is frequency, unit is hertz (Hz), C is capacitance, and unit is farad (F). The invention takes advantage of the characteristics of capacitors to isolate and connect signals. By the above formula, it can be seen that the capacitive reactance is indirectly proportional to the operating frequency and the capacitance. As the signal frequency increases, the capacitive reactance will be significantly reduced (see the frequency and capacitive reactance comparison chart of the 0.01 μF capacitor shown in Figure 3) and the signal dilution will be significantly reduced, resulting in better link performance. And achieve a high transmission speed. Due to the characteristic that the strength of the capacitor rises with increasing frequency, the capacitor is effective for use in high frequency (wideband) networks (1 Gbps and above) and isolating in generating electric field induction to connect signals. Moreover, the characteristics of the capacitor can improve the connection of high frequency network signals.

Referring again to FIGS. 4 and 1, the network signal coupling circuit 1 and the network on chip 3 are directly installed in the circuit board 4 and electrically connected to the network connector 2. Alternatively, the network signal coupling circuit 1 may be installed in the circuit board 4, installed in the network connector 2 as the circuit board 4, and the network connector 2 in the external circuit board. And may be electrically connected to the network-on-chip 3 from an external circuit board. In any of the alternative arrangements described above, the network signal coupling circuit 1 can effectively connect signals between the network connector 2 and the network on chip 3 and can provide a filtration effect. The arrangement of the network connector 2 and the network on chip 3 is a prior art and is not within the spirit and scope of the present invention. Therefore, a more detailed description is unnecessary at this point. Moreover, for use in a network of 10 Mbps to 100 Mbps transmission speed, the network signal coupling circuit 1 only needs to provide two two wire channels 12; For use in networks of 100 Mbps or higher (eg 1 Gbps to 10 Gbps) transmission rates, the network signal coupling circuit 1 must have four two wire channels 12. Moreover, the arrangement of the network connector 2 and the network on chip 3 are prior art and are not within the spirit and scope of the present invention. Therefore, a more detailed description is unnecessary at this point.

What has been described herein is just one embodiment for implementing the network signal coupling circuit according to the present invention, and the present invention is not limited to the following embodiments, as claimed in the following utility model registration claims. Without departing from the gist of the present invention, anyone with ordinary knowledge in the field to which the present invention belongs will have a technical spirit of the present invention to the extent that various modifications can be made.

1: network signal coupling circuit 2: network connector
3: network on chip 4: circuit board
10: first connection end 11: second connection end
12: 2-wire channel 13: filter module
14 coupling module 131 first coil
132: second coil 141: first capacitor
142: second capacitor 143: first corresponding resistor
144: second corresponding resistor 145: third corresponding resistor
146: fourth corresponding resistor 147: signal ground terminal
1471 ground terminal 1472 power

Claims (8)

Installed on a circuit board, the circuit board including a network on chip and electrically connected to a network connector,
Consists of opposing first and second connecting ends, a plurality of two-wire channels electrically connected between the first and second connecting ends, and a coupling module provided in each of the two-wire channels; ,
Each coupling module comprises a first capacitor and a second capacitor, each electrically connected in series to two wires of a respective two-wire channel, the first capacitor and the second capacitor adjacent to the second connection end. A first corresponding resistor and a second corresponding resistor electrically connected in parallel to the third resistor; a third corresponding resistor and a fourth corresponding resistor electrically connected in parallel to the first capacitor and the second capacitor at opposing surfaces adjacent the first connection end; And a corresponding resistor, and two signal ground terminals electrically connected to opposite ends of the first and second corresponding resistors and opposite ends of the third and fourth corresponding resistors, respectively. Signal coupling circuit.
The method of claim 1,
A filter module installed in each of the two-wire channels, the filter module being electrically connected between a first connection end of the network signal coupling circuit and a coupling module in each two-wire channel, each of the filter modules respectively; A network signal coupling circuit comprising: a first coil and a second coil electrically connected in series to two wires of a two-wire channel of the circuit.
The method of claim 1,
In each of the two connected corresponding resistors and in each wire of each two wire channel, the capacitor of each coupling module constitutes each π loop, and the two π loops in each two wire channel are symmetrical. ; One of the two signal ground terminals that electrically connects with the corresponding resistors of each coupling module at each end of the capacitor of each coupling module adjacent to the first connection terminal is a ground terminal, and the second connection terminal A network signal coupling circuit characterized in that the other of the two signal ground terminals electrically connected to the corresponding resistors of each coupling module at each opposite end of the capacitor of each coupling module in the vicinity of is a power source. .
The method of claim 1,
After circuit matching, the first capacitor and the second capacitor of the coupling module are 0.1 μfarad; A first corresponding resistor and a second corresponding resistor of the coupling module located adjacent to the network on chip are 49.9? And the third and fourth corresponding resistors of the coupling module located adjacent to the network connector are 75 Ω.
It is installed on the circuit board of the network connector which is electrically connected to the network on chip.
Consists of opposing first and second connecting ends, a plurality of two-wire channels electrically connected between the first and second connecting ends, and a coupling module provided in each of the two-wire channels; ,
Each coupling module comprises a first capacitor and a second capacitor, each electrically connected in series to two wires of a respective two-wire channel, the first capacitor and the second capacitor adjacent to the second connection end. A first corresponding resistor and a second corresponding resistor electrically connected in parallel to the third resistor; a third corresponding resistor and a fourth corresponding resistor electrically connected in parallel to the first capacitor and the second capacitor at opposing surfaces adjacent the first connection end; And a corresponding resistor, and two signal ground terminals electrically connected to opposite ends of the first and second corresponding resistors and opposite ends of the third and fourth corresponding resistors, respectively. Signal coupling circuit.
The method of claim 5,
A filter module installed in each of the two-wire channels, the filter module being electrically connected between a first connection end of the network signal coupling circuit and a coupling module in each two-wire channel, each of the filter modules respectively; A network signal coupling circuit comprising: a first coil and a second coil electrically connected in series to two wires of a two-wire channel of the circuit.
The method of claim 5,
In each of the two connected corresponding resistors and in each wire of each two wire channel, the capacitor of each coupling module constitutes each π loop, and the two π loops in each two wire channel are symmetrical. ; One of the two signal ground terminals that electrically connects with the corresponding resistors of each coupling module at each end of the capacitor of each coupling module adjacent to the first connection terminal is a ground terminal, and the second connection terminal A network signal coupling circuit characterized in that the other of the two signal ground terminals electrically connected to the corresponding resistors of each coupling module at each opposite end of the capacitor of each coupling module in the vicinity of is a power source. .
The method of claim 5,
After circuit matching, the first capacitor and the second capacitor of the coupling module are 0.1 μfarad; A first corresponding resistor and a second corresponding resistor of the coupling module located adjacent to the network on chip are 49.9? And the third and fourth corresponding resistors of the coupling module located adjacent to the network connector are 75 Ω.

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