CN203219326U

CN203219326U - Network signal coupling and electromagnetic interference preventing circuit

Info

Publication number: CN203219326U
Application number: CN 201320087464
Authority: CN
Inventors: 莫家平; 刘有志
Original assignee: HONGYE TECHNOLOGY Inc
Current assignee: HONGYE TECHNOLOGY Inc
Priority date: 2013-02-26
Filing date: 2013-02-26
Publication date: 2013-09-25
Anticipated expiration: 2023-02-26

Abstract

The utility model relates to a network signal coupling and electromagnetic interference preventing circuit, which comprises a processing circuit, wherein the processing circuit is arranged on a circuit board provided with a network chip and electrically connected with a network connector so as to carry out processing on signals, and the network chip is a chip with a voltage mode and provides driving voltage for a signal coupling circuit. The processing circuit is provided with a plurality of channels with two circuits, wherein two ends of the plurality of the channels are respectively provided with a first connecting end which is connected with the network connector and a second connecting end which is connected with the network chip, one or more channels are connected to a coupling module and an electromagnetic interference preventing module between the first connecting end and the second connecting end, the coupling module is connected to a first capacitor by the two circuits of one or more channels, the electromagnetic interference preventing module is connected to two second capacitors in series between the two circuits of one or more channels, and the other ends, which are away from the circuit, of the second capacitors are electrically connected to a grounding terminal. The purpose of improving signal coupling, the transmission effect and the use stability can be achieved.

Description

Network signal coupling and anti-electromagnetic interference circuit

Technical field

The utility model provides a kind of network signal coupling and anti-electromagnetic interference circuit, especially refer to that treatment circuit is provided with coupling module and anti-electromagnetic interference module between network connector and network chip, utilize treatment circuit to isolate electric, coupled signal and absorb harmonic wave, and then reach the purpose that promotes signal coupling, laser propagation effect and stability in use.

Background technology

The fast development of computer technology now, and desktop computer or notebook computer general be present in each corner in the society, its computer development trend is also strong towards calculation function, speed reaches the little direction of volume soon and strides forward, because during network communications technology is also rapidly flourish, and people are lived, study, work is brought another different brand-new boundary in the past into leisure, make between men and can transmit required real time information mutually by network communication, advertising or contact mail etc., simultaneously by the various information of Web search, instant messaging or online game etc. allow between people and the network relation more fervent and inseparable.

But the part of network is transmitted data for two kinds of modes such as the connection of the cable of use and wireless transmission are arranged, the cable interconnection technique just need be equiped with network connector, the legacy network connector is for having transformer module and common mode inhibition module, see also shown in Figure 5, the practice of general manufacturer is that transformation coil B and filter coil C are installed on the circuit board A, and transformation coil B and filter coil C are arranged with lead D1 on core D, the joint of lead D1 end is the contact that is welded in circuit board A, because coil needs to cause production efficiency low with manual the winding, more can't automated production, coil also ruptures easily and allows cost improve, and what twine is tight, distance, differences such as the number of turns also can impact effect, and causes product quality very different.

Moreover, along with the utilization of network is more and more wider, the data capacity of transmission over networks is also increasing, and network vendors is just drawn high the network transmitting speed for the demand that satisfies the user always, from 10Mbps to 100Mbps or 1Gbps, even the present fiber optic network transmission speed of releasing can reach more than the 10Gbps, yet transformation coil B is inductance, and what the impedance of inductance (Z) claimed is induction reactance, its unit is ohm (Ω), and the formula of induction reactance is:

Ｚ＝2π*ｆ*L

F is frequency in the above-mentioned formula, and unit is hertz (Hz); L is the sense value of inductance, unit is Henry (H), because network connector is to utilize the inductance characteristic of transformation coil B to isolate electric and coupled signal, so in order to allow signal be delivered to secondary side by primary side, must allow transformation coil B have predetermined sense value, can be learnt by above-mentioned formula, induction reactance is directly proportional with operating frequency and inductance sense value, so under the situation that signal frequency increases, its induction reactance also can increase thereupon and (sees also shown in Figure 6, it is the frequency of 350 μ H electric capacity and the comparison diagram of induction reactance), but increasing, induction reactance can allow the decay of signal become big, so can produce the slack-off disappearance of network outage or network transfer speeds, please consult shown in Figure 7ly simultaneously, from figure, can learn, when the insertion loss of transformer be-during 3db, frequency response is about 0 ﹒ 45MHz～240MHz, inserts loss and increases fast because can allow when surpassing, so the operating frequency of transformer can only be in specific narrower frequency range; In addition, because the characteristic of transformation coil B is by low frequency low-intensity, medium frequency high strength and the formed curve of high-frequency low-intensity, so, can allow the signal strength signal intensity of transformation coil B reduce on the contrary, and be difficult for reaching the requirement that meets product during up to 1Gbps in network transfer speeds.

So, manufacturer just wants problem and the disappearance at existing transformation coil, utilize existing electronic component and circuit design to research and develop improvement, yet, because the transformation coil has inductance characteristic and allows signal attenuation, if signal do not decay then again can be on being transferred to mainboard network chip the time, because producing harmonic wave, signal forms radiation and the interference phenomenon that generates an electromagnetic field, allow each electronic component around the network chip or device be interfered and can't normal operation or allow performance reduce, therefore, it is bad how to utilize existing electronic component and circuit design to solve existing transformation coil quality, the cost height, can't automated production reach problem and the disappearance that intensity reduces when high network transfer speeds, the effect that has simultaneously the electromagnetic interference of preventing again, this is the inventor and the target place of being engaged in this journey improvement that the dealer desires most ardently.

So the creator is because above-mentioned problem and disappearance is to collect related data, via assessing in many ways and considering, and to engage in the many years of experience of the industry accumulation, via constantly studying and revising, the utility model patent that the beginning is designed the coupling of this kind network signal and anti-electromagnetic interference circuit is born.

Summary of the invention

Main purpose of the present utility model is to be to provide a kind of network signal coupling and anti-electromagnetic interference circuit, this one or more passage is provided with coupling module and anti-electromagnetic interference module between first link and second link, utilize coupling module to isolate electric and coupled signal, the electric capacity of the anti-electromagnetic interference module of recycling comes signal is absorbed in low frequency harmonic wave partly, so under high network, still have good network signal coupling effect, and allow signal be transferred to behind the network chip not can to arround element produce electromagnetic interference, and then reach and promote the signal coupling, the purpose of laser propagation effect and stability in use.

Secondary objective of the present utility model is to be to provide a kind of network signal coupling and anti-electromagnetic interference circuit, should be in series with two second electric capacity between anti-two circuit of electromagnetic interference module with one or more passages, hold in addition with each second electric capacity again and be electrically connected at earth terminal, because only used general electronic component finished product to be welded on circuit board and must manually not wind the line, just can do automated production, and the electronic component finished product can carry out quality management when buying, and then reaches and promote the purpose that yield and automation reduce production costs.

In order to achieve the above object, the utility model provides a kind of network signal coupling and anti-electromagnetic interference circuit, it comprises on the circuit board that is arranged at the tool network chip, and again with the treatment circuit of network connector electric connection so that signal is handled, network chip is the chip of voltage mode, network chip supply driving voltage is to signal coupling circuit

This treatment circuit is provided with a plurality of passages of tool two circuit respectively, a plurality of passage two ends have first link that connects network connector respectively, second link that connects network chip, and one or more passage is provided with coupling module and anti-electromagnetic interference module between first link and second link, coupling module is provided with first electric capacity with two circuit of one or more passages, should anti-electromagnetic interference module then be in series with two second electric capacity between two circuit with one or more passage, be electrically connected at earth terminal with each second electric capacity away from holding in addition of circuit again.

Wherein, the appearance value of first electric capacity of this coupling module is 100 μ F～0 ﹒, 01 μ F.

Wherein, the appearance value of this first electric capacity is 0 ﹒, 1 μ F.

Wherein, this filtration module is arranged at contiguous first link, one side of coupling module.

Wherein, this filtration module is arranged at contiguous second link, one side of coupling module.

Wherein, the quantity of these a plurality of passages is four, and each circuit of four-way is for connecting MD0+ and MX0+, MD0-and MX0-, MD1+ and MX1+, MD1-and MX1-, MD2+ and MX2+, MD2-and MX2-, MD3+ and MX3+, MD3-and MX3-respectively.

In order to achieve the above object, the utility model provides a kind of network signal coupling and anti-electromagnetic interference circuit, it comprises and being arranged on the network connector internal circuit board, and again with the treatment circuit of network chip electric connection so that signal is coupled, network chip is the chip of voltage mode, network chip supply driving voltage is to signal coupling circuit

Wherein, the appearance value of this first electric capacity is 0 ﹒, 1 μ F.

Description of drawings

Fig. 1 is the calcspar of the utility model preferred embodiment.

Fig. 2 is the circuit diagram of the utility model preferred embodiment treatment circuit.

Fig. 3 is the calcspar of another embodiment of the utility model.

Fig. 4 is the circuit diagram of another embodiment treatment circuit of the utility model.

Fig. 5 is existing stereo appearance figure.

Fig. 6 is the comparison diagram of existing frequency and induction reactance.

Fig. 7 is the frequency response chart of existing transformer.

(the utility model)

1, treatment circuit; 10, first link; 11, second link; 12, passage; 121, circuit; 13, coupling module; 131, first electric capacity; 14, anti-electromagnetic interference module; 141, second electric capacity; 142, earth terminal; 2, network connector; 3, network chip; 4, circuit board;

(having now)

A, circuit board; B, transformation coil; C, filter coil; D, core; D1, lead.

Embodiment

For reaching above-mentioned purpose and effect, the technological means that the utility model adopts and structure thereof, drawing now illustrates in detail that with regard to preferred embodiment of the present utility model its feature and function are as follows, in order to understand fully.

See also shown in Fig. 1 to 4, find out in the utility model preferred embodiment by knowing shown in the figure, this treatment circuit 1 is arranged on the circuit board 4, and two ends are respectively equipped with and electrically conduct in first link 10 of network connector 2 and electrically conduct in second link 11 of network chip 3, its treatment circuit 1 is provided with a plurality of passages 12 of tool two circuit 121 respectively, one or more passage 12 is provided with coupling module 13 and anti-electromagnetic interference module 14 between first link 10 and second link 11, coupling module 13 is provided with electric capacity 131 respectively with two circuit 121 of one or more passages 12, anti-14 121 in two circuit with one or more passage 12 of electromagnetic interference module are in series with two second electric capacity 141, are electrically connected at earth terminal 142 with each second electric capacity 141 away from holding in addition of circuit 121 again.

See also shown in Fig. 1 to 4, find out in another embodiment of the utility model by knowing shown in the figure, anti-electromagnetic interference module 14 each second electric capacity 141 are connected to earth terminal 142 after end can be connected in addition again, and this treatment circuit 1 is each terminal that is electrically connected at network connector 2 with first link 10, and treatment circuit 1 is a plurality of pins that are electrically connected at network chip 3 with second link 11, its passage 12 quantity can be four, each circuit 121 of four-way 12 is for connecting MD0+ and MX0+ respectively, MD0-and MX0-, MD1+ and MX1+, MD1-and MX1-, MD2+ and MX2+, MD2-and MX2-, MD3+ and MX3+, MD3-and MX3-, the visual actual design demand conversion of its position, non-so namely limit to claim of the present invention.

Above-mentioned network chip 3 is the chip of voltage mode, so network chip 3 supply driving voltages are to signal coupling circuit 1, because signal is to change with voltage one when transmission, so when using the network chip 3 of current-mode, its coupling module 13 need provide resistance could produce voltage to carry out the signal transmission, use the network chip 3 of voltage mode just resistance must be set, so coupling module 13 only needs to be provided with first electric capacity 131 in each circuit 121 of one or more passages 12, because when the characteristic of first electric capacity 131 makes the supply voltage source to its first end, can allow its first end produce the transient state electric charge (as positive charge) of single polarity, and first electric capacity, 131 second ends then can produce the transient state electric charge (as negative electrical charge) of another polarity, and after through one period scheduled time during stop supplies positive charge to the first electric capacity 131 first ends, its first electric capacity, 131 second ends then can pour off negative electrical charge along circuit 121, just can reach the laser propagation effect of signal coupling, simultaneously, first electric capacity 131 can not allow signal directly pass circuit 121 again, just can reach the effect that prevents reverse current, yet, because the speed when first electric capacity 131 discharges and recharges is for relevant with time constant, so must allow time constant and signal period arrange in pairs or groups, could allow the time that discharges and recharges just can transmit for complete signal, and can truncated signal, and the appearance value of first electric capacity 131 increase back time constant also can increase thereupon, so the appearance value of first electric capacity 131 is 100 μ F～0 ﹒, 01 μ F, the preferable appearance value of its first electric capacity 131 is 0 ﹒, 1 μ F.

Above-mentioned coupling module 13 is to allow two terminal circuit be coupled with first electric capacity 131 that is connected with on the circuit 121, and the impedance of electric capacity (Z) is called capacitive reactance, and its unit is ohm (Ω), and the formula of capacitive reactance is:

Ｚ＝1／（2π*ｆ*Ｃ）

F is frequency in the above-mentioned formula, and unit is hertz (Hz); C is the appearance value of electric capacity, unit is farad (F), owing to be to utilize the characteristic of electric capacity to isolate electric and coupled signal, can be learnt by above-mentioned formula, capacitive reactance and operating frequency and capacitor's capacity are inversely proportional to, so under the situation of first electric capacity 131 that uses identical appearance value and signal frequency increase, its capacitive reactance meeting reduces thereupon, then the decay of signal also can diminish, just can have good network line and signaling rate also can accelerate, owing to utilized the electric capacity characteristic that its intensity also can increase under the more high state of frequency thereupon, in the situation (greater than 1Gbps) that network (frequency range) is more and more higher now, the direct current that allows the electric capacity utilization isolate computer forms electric field induction and does the signal coupling, and the characteristic of electric capacity also can allow the coupling effect of high frequency network signal improve thereupon.

Moreover, see also shown in Fig. 1,3, by knowing the circuit board 4 of finding out that this treatment circuit 1 arranges shown in the figure, can directly be provided with network chip 3, a plurality of terminals with network connector 2 electrically connect again; And the circuit board 4 that treatment circuit 1 arranges also can be arranged at network connector 2 inside, again network connector 2 is electrically connected at the external circuit board, and with the external circuit board on the network chip that arranges 3 form and electrically connect, its only tool the signal that transmits between network connector 2 and the network chip 3 is coupled and the function of filtering gets final product, yet related network connector 2 and network chip 3 be configured to existing technology, and this thin portion constitutes non-this case invention main points, repeats no more now.

See also shown in Fig. 1 to 4, find out by knowing shown in the figure, because have decay hardly via the signal after coupling module 13 processing, so almost therefore original signal transmits toward network chip 3 one ends, detect as an example with transmitted signal and to describe, because the network signal transmission is multiple, so signal can produce the tool harmonic wave of intensity (dB) greatly at the 125MHz of low frequency and the 250MHz place of high frequency, and the signal that has other during because of the signal transmission is come in, so can produce noise, just need and prevent that second electric capacity 141 of electromagnetic interference module 14 series connection is because have the effect of high-pass filtering (High Pass) with noise filtering, and along with but the signal frequency of its filtering of reduction of second electric capacity, 141 appearance values just can increase thereupon, so as the appearance value of adjustable whole second electric capacity 141 allow signal by but noise by filtering, it is to utilize the ability that stores electric charge to absorb in the frequency range than low frequency harmonic wave partly, allow low frequency harmonic wave partly to branch to earth terminal 142 again, and then reach the effect of filtering low-frequency noise, so through the signal after anti-electromagnetic interference module 14 processing, just the harmonic wave that does not have low-frequency range produces, after so signal is transferred to network chip 3, just not can to arround element produce electromagnetic interference, and then reach the purpose that promotes stability in use.

Simultaneously, because filtration module 13 only is that signal is carried out noise filtering, so filtration module 13 can be arranged at coupling module 14 contiguous second link, 11 1 sides or contiguous second link, 11 1 sides, and all can have the noise filtering effect.

Above-mentioned network signal of the present utility model coupling and anti-electromagnetic interference circuit when reality is used, for can having following advantage, as:

This one or more passage 12 is provided with coupling module 13 and anti-electromagnetic interference module 14 between first link 10 and second link 11, utilize coupling module 13 to isolate electric and coupled signal, allow coupling circuit be used in and still have good network signal coupling effect under the high network, and then the coupling of lifting signal and laser propagation effect, second electric capacity 141 of the anti-electromagnetic interference module 14 of recycling comes signal is absorbed in low frequency harmonic wave partly, allow signal be transferred to behind the network chip 3 not can to arround element produce electromagnetic interference.

Should prevent that electromagnetic interference module 14 was in series with second electric capacity 141 with 121 in two circuit of one or more passages 12, hold in addition with each second electric capacity 141 again and be electrically connected at earth terminal 142, because only used general electronic component finished product, so must manually not wind the line, but directly be welded on the circuit board, just can do automated production, and the electronic component finished product just can carry out quality management when buying, so the quality of product just can remain in the non-defective unit scope, and then reach and promote the purpose that yield and automation reduce production costs.

So; the utility model is primarily aimed at network signal coupling and anti-electromagnetic interference circuit; electrically conduct in first link 10 of network connector 2 and electrically conduct in second link 11 of network chip 3 and can be respectively equipped with in treatment circuit 1 two ends; treatment circuit 1 is provided with a plurality of passages 12 of tool two circuit 121 respectively; one or more passage 12 is provided with coupling module 13 and anti-electromagnetic interference module 14 between first link 10 and second link 11; coupling module 13 is provided with first electric capacity 131 respectively with two circuit 121 of one or more passages 12; anti-14 121 in two circuit with one or more passage 12 of electromagnetic interference module are in series with second electric capacity 141; hold in addition with each second electric capacity 141 again and be electrically connected at earth terminal 142; just can utilize coupling module 13 to isolate electric and coupled signal; and then the coupling of lifting signal and laser propagation effect; second electric capacity 141 of the anti-electromagnetic interference module 14 of recycling comes signal is absorbed in low frequency harmonic wave partly; allow signal be transferred to behind the network chip 3 not can to arround element produce electromagnetic interference; promote the signal coupling to reach; the purpose of laser propagation effect and stability in use is main key protection point; but; the above only is preferred embodiment of the present utility model; non-so namely limit to claim of the present utility model; so the simple and easy modification and the equivalent structure that use the utility model specification and graphic content to do such as change; all should in like manner be contained in the claim of the present utility model, close and give Chen Ming.

In sum, the above-mentioned network signal coupling of the utility model and anti-electromagnetic interference circuit are when using, for reaching its effect and purpose really, so the utility model really is the utility model of a practicality excellence, for meeting the application important document of novel patent, the whence method is filed an application.

Claims

1. a network signal coupling reaches anti-electromagnetic interference circuit, it is characterized in that: it comprises on the circuit board that is arranged at the tool network chip, and again with the treatment circuit of network connector electric connection so that signal is handled, network chip is the chip of voltage mode, network chip supply driving voltage is to signal coupling circuit

2. network signal coupling according to claim 1 and anti-electromagnetic interference circuit is characterized in that the appearance value of first electric capacity of this coupling module is 100 μ F～0 ﹒, 01 μ F.

3. network signal coupling according to claim 2 and anti-electromagnetic interference circuit is characterized in that the appearance value of this first electric capacity is 0 ﹒, 1 μ F.

4. network signal coupling according to claim 1 and anti-electromagnetic interference circuit is characterized in that, this filtration module is arranged at contiguous first link, one side of coupling module.

5. network signal coupling according to claim 1 and anti-electromagnetic interference circuit is characterized in that, this filtration module is arranged at contiguous second link, one side of coupling module.

6. network signal coupling according to claim 1 reaches anti-electromagnetic interference circuit, it is characterized in that, the quantity of these a plurality of passages is four, and each circuit of four-way is for connecting MD0+ and MX0+, MD0-and MX0-, MD1+ and MX1+, MD1-and MX1-, MD2+ and MX2+, MD2-and MX2-, MD3+ and MX3+, MD3-and MX3-respectively.

7. a network signal coupling reaches anti-electromagnetic interference circuit, it is characterized in that, it comprises and being arranged on the network connector internal circuit board, and again with the treatment circuit of network chip electric connection so that signal is coupled, network chip is the chip of voltage mode, network chip supply driving voltage is to signal coupling circuit

8. network signal coupling according to claim 7 and anti-electromagnetic interference circuit is characterized in that the appearance value of first electric capacity of this coupling module is 100 μ F～0 ﹒, 01 μ F.

9. network signal coupling according to claim 8 and anti-electromagnetic interference circuit is characterized in that the appearance value of this first electric capacity is 0 ﹒, 1 μ F.

10. network signal coupling according to claim 7 and anti-electromagnetic interference circuit is characterized in that, this filtration module is arranged at contiguous first link, one side of coupling module.

11. network signal coupling according to claim 7 and anti-electromagnetic interference circuit is characterized in that, this filtration module is arranged at contiguous second link, one side of coupling module.

12. network signal coupling according to claim 7 and anti-electromagnetic interference circuit, it is characterized in that, the quantity of these a plurality of passages is four, and each circuit of four-way is for connecting MD0+ and MX0+, MD0-and MX0-, MD1+ and MX1+, MD1-and MX1-, MD2+ and MX2+, MD2-and MX2-, MD3+ and MX3+, MD3-and MX3-respectively.