CN101752853B - Surge protection circuit, local area network connector and network module - Google Patents
Surge protection circuit, local area network connector and network module Download PDFInfo
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- CN101752853B CN101752853B CN 200810184387 CN200810184387A CN101752853B CN 101752853 B CN101752853 B CN 101752853B CN 200810184387 CN200810184387 CN 200810184387 CN 200810184387 A CN200810184387 A CN 200810184387A CN 101752853 B CN101752853 B CN 101752853B
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Abstract
The invention relates to a surge protection circuit of a local area network connector which is applicable to a plurality of transformers coupled and configured in the local area network connector. The surge protection circuit comprises a conjugate coil module and a surge absorbing element, wherein the surge protection circuit is at least provided with a conjugate coil; each conjugate coil is provided with a first input end, a second input end, a first output end and a second output end; and the first input end and the second input end of each conjugate coil are respectively coupled with secondary side tapping ends of the middle parts of the transformers. The first end of the surge absorbing element is grounded, and the second end thereof is coupled with the first output ends and the second output ends.
Description
Technical field
The invention relates to a kind of surge protecting circuit (Preventing Surge Circuit), and particularly relevant for a kind of surge protecting circuit and the local area network connector and the mixed-media network modules mixed-media that use it.
Background technology
Surging can be from the transmission line or grounding path influence product itself (for example computer or phone etc.), its effect and scope are big or small and have differently according to intrusion path and energy, wherein directly inject the injury maximum of product inside with surging.Thunderbolt is a big surging source, and lightning rod the is a positive guide exergonic device that is struck by lightning.Because the electric current of thunderbolt can cause voltage swells in earth resistance; And possibly conduct to product end through the circuit coupling of burying under ground; And then the inner member of destruction product; Gently then make some disabler of product, heavy then entire product is damaged, so surge protection means just becomes the necessary device on the circuit.
Traditional surge protection means is as being: (1) is provided with a transformer (Transformer) and utilizes transformer that high-tension energy is reduced in product circuit; But this mode maybe be bad because of transformer itself design, makes high voltage to reduce and directly to get into product inner and cause damage.(2) use surging absorber element (Surge Absorbing Device) like Zener diode (Zener Diode) or oxidized metal rheostat.With the Zener diode is example, and under the circuit normal voltage, the surging absorber element does not have effect.When surging occurs making voltage swells (like power switch switching, static; Even thunderbolt takes place) time; The breakdown voltage (Breakdown Voltage) that surpasses itself because of the applied voltage of surging absorber element forms path, so the time because of the electric current that voltage swells produced, some is understood and absorbed by the surging absorber element; Another part then can reach earth terminal via the surging absorber element, so just can protect back-end circuit not receive the injury of big electric current.
Shown in Figure 1 is the LAN module circuit diagram of known tool surge protecting circuit.Please with reference to Fig. 1, known LAN module 100 has a local area network connector 102 and a surge protecting circuit 104, and wherein surge protecting circuit 104 is by three surging absorber element 104a, 104b, 104c and two resistance R
1, R
2Constitute.One side of local area network connector 102 has a transmitting terminal TX, a center tap transmitting terminal TXCT, a receiving terminal RX and a center tap receiving terminal RXCT, and wherein transmitting terminal TX and receiving terminal RX are coupled to the network (not shown) respectively.Center tap transmitting terminal TXCT is coupled to second end 2 of surging absorber element 104b, first end 1 of resistance R 2 and first end 1 of surging absorber element 104c, and center tap receiving terminal RXCT is coupled to first end 1 of surging absorber element 104a, first end 1 of resistance R 1 and first end 1 of surging absorber element 104b.In addition, second end 2 of resistance R 1, R2 and surging absorber element 104a, 104c all is coupled to ground.Wherein, resistance R
1, R
2Can pass through a capacitor C 1 ground connection.
Can know by Fig. 1; Voltage swells when surging takes place; Make the current rush of element internal, the center tap receiving terminal RXCT that wherein flows through increases electric current suddenly when flowing to node A, and some can be absorbed or flow to earth terminal via surging absorber element 104a by surging absorber element 104b.In like manner, the center tap transmitting terminal TXCT that flows through increases electric current suddenly when flowing to Node B, and some also can flow to earth terminal by surging absorber element 104b absorption or via surging absorber element 104c.Thus, utilize surging absorber element 104a, 104b and 104c will guide to ground, just can reach the effect that the protection back-end circuit does not receive big electric current injury because of the electric current that voltage swells produced.
Yet though the surging absorber element can be used for protective circuit, but cost is higher, and its demand number will increase with the increase of the number of transformer.Therefore, for device low-cost and that higher tolerance degree can be arranged, will become the trend of following research and development when surging takes place.
Summary of the invention
The object of the invention is providing a kind of surge protecting circuit exactly, and it utilizes and uses single surging absorber element, and just the protective circuit element does not receive the injury of surging effectively, and reduces the cost of circuit element.
The present invention provides a kind of local area network connector, and it comprises above-mentioned surge protecting circuit.
The present invention provides a kind of mixed-media network modules mixed-media, and it comprises above-mentioned local area network connector.
The present invention proposes a kind of surge protecting circuit of local area network connector, is suitable for coupling a plurality of transformers that are disposed in the local area network connector.Surge protecting circuit comprises an associate coil module and a surging absorber element; Wherein, Surge protecting circuit has an associate coil at least; And each associate coil has a first input end, one second input, one first output and one second output, and the first input end of each associate coil and second input couple the center tap end of the secondary side of these transformers respectively.The surging absorber element has first end and second end, the first end ground connection of surging absorber element, and second end then directly couples these first outputs and these second outputs.
In one embodiment of this invention, above-mentioned surging absorber element comprises ceramic gas discharge tube, transient voltage suppresser diode, SD or piezo-resistance surge absorber.
The present invention proposes a kind of local area network connector, and it comprises a plurality of transformers, an associate coil module and a surging absorber element.The secondary side of each transformer comprises one first end points, one second end points and a center tap end.The associate coil module has one first associate coil at least; And first associate coil has a first input end and one second input; In order to the center tap end of the secondary side that couples these transformers respectively, and first associate coil also comprises one first output and one second output.The surging absorber element has first end and second end, the first end ground connection of surging absorber element, and its second end then directly couples first output and second output of associate coil.
In one embodiment of this invention, above-mentioned local area network connector also comprises a plurality of resistance, and the first end ground connection of resistance, and the then corresponding respectively center tap end that is coupled to the secondary side of these transformers of second end of resistance.Wherein first end of resistance can pass through capacity earth.
In one embodiment of this invention, above-mentioned surging absorber element comprises ceramic gas discharge tube, transient voltage suppresser diode, SD or piezo-resistance surge absorber.
In one embodiment of this invention, first end of the part secondary side of above-mentioned transformer and second end are in order to the data transfer group as local area network connector.
In one embodiment of this invention, first end of the part secondary side of above-mentioned transformer and second end are in order to the data receiver group as local area network connector.
From another viewpoint, the present invention proposes a kind of mixed-media network modules mixed-media, and it comprises a processing unit and a network connector.Processing unit is in order to the transmission or the reception of management data.Network connector is suitable for coupling a grid line, and to receive or to transmit data, wherein network connector comprises a plurality of transformers, an associate coil module and a surging absorber element.The primary side of each transformer is coupled to processing unit, and the secondary side of each transformer comprises one first end points, one second end points and a center tap end.The associate coil module has one first associate coil at least; And first associate coil has a first input end and one second input; In order to coupling the center tap end of these transformers respectively, and first associate coil also comprises one first output and one second output.The surging absorber element has first end and second end, the first end ground connection of surging absorber element, and its second end then couples first output and second output of associate coil.
In one embodiment of this invention, above-mentioned network connector also comprises a plurality of resistance, and the first end ground connection of resistance, and the then corresponding respectively center tap end that is coupled to the secondary side of these transformers of second end of resistance.Wherein first end of resistance can pass through capacity earth.
In one embodiment of this invention, above-mentioned surging absorber element comprises ceramic gas discharge tube, transient voltage suppresser diode, SD or piezo-resistance surge absorber.
In one embodiment of this invention, the part secondary side of above-mentioned transformer comprises first end points and second end points, in order to the data transfer group as local area network connector.
In one embodiment of this invention, the part secondary side of above-mentioned transformer comprises first end points and second end points, in order to the data receiver group as local area network connector.
In one embodiment of this invention; Above-mentioned mixed-media network modules mixed-media also comprises a plurality of second associate coils; Have a first input end and one second input respectively; Couple first end points and second end points that one of them secondary side of these transformers comprises with correspondence, and these associate coils also have one first output and one second output respectively, in order to be coupled to a network.
In one embodiment of this invention, the first associate coil number in the above-mentioned associate coil module is to determine according to the number of these transformers.
In one embodiment of this invention, the number of above-mentioned transformer is 2 times of the first associate coil number in the associate coil module.
Based on above-mentioned; Surge protecting circuit of the present invention is to utilize corresponding respectively first associate coil that is coupled to an associate coil module of each the center tap end in the transformer; And the other end of first associate coil is electrically connected and is coupled to a surging absorber element again and ground connection each other, so, and when arbitrary center tap brings out at present big electric current; The electric current of part just can be directed to earth terminal through single surging absorber element, reaches the effect of protective circuit.In addition, because surge protecting circuit of the present invention only adopts single surging absorber element can reach the function of protective circuit, so reduced the cost of circuit element.Moreover similar technical scheme may also be practiced in the application on local area network connector and the mixed-media network modules mixed-media.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Shown in Figure 1 is the LAN module circuit diagram of known tool surge protecting circuit.
Shown in Figure 2 for the computer system calcspar of the present invention's one example embodiment.
Shown in Figure 3 for the mixed-media network modules mixed-media circuit diagram of the present invention's one example embodiment.
Shown in Figure 4 for the mixed-media network modules mixed-media local circuit sketch map of another example embodiment of the present invention.
Embodiment
Existing with detailed reference example embodiment of the present invention, the instance of said example embodiment will be described in the accompanying drawings.In addition, following example embodiment and graphic in, same or analogous label is represented same or analogous element, with simplified illustration.
Shown in Figure 2 for the computer system calcspar of the present invention's one example embodiment.Please with reference to Fig. 2; This computer system 200 comprises central processing unit (Central Processing Unit; CPU) 210, chipset 220, operating system (Operating System; OS) 230, mixed-media network modules mixed-media 240 and network 250, wherein mixed-media network modules mixed-media 240 also comprises processing unit 242 and network connector (Network Connector) 244.
Processing unit in the mixed-media network modules mixed-media 240 242 transmission or receptions in order to management data, it is coupled to network connector 244, and thus, network connector 244 just can be with being sent to network 250 by processing unit 242 received data.
Below will partly be described in more detail, the example embodiment of aforesaid mixed-media network modules mixed-media is described in the accompanying drawings to the mixed-media network modules mixed-media of this example embodiment.
Shown in Figure 3 is the mixed-media network modules mixed-media circuit diagram of example embodiment of the present invention.As shown in Figure 3, the mixed-media network modules mixed-media 300 that present embodiment provided comprises processing unit 310 and network connector 320.Network connector 320 have a plurality of transformer 321, a plurality of second associate coil 323 (aforementioned two in Fig. 3 only schematically shown in four) and surge protecting circuit 325, wherein network connector 320 for example is a local area network connector.In addition; In the present embodiment, this mixed-media network modules mixed-media 300 also comprises a plurality of resistance R (among Fig. 3 only schematically shown in four), and resistance R has first end 1 and second end 2; And first end, 1 ground connection of resistance R, and its second end 2 is coupled to transformer 321 and surge protecting circuit 325.Wherein first end 1 of resistance R can pass through capacitor C 1 ground connection.
The secondary side of transformer 321 comprises the first end points a, the second end points b and center tap end c; Wherein each center tap end c respectively with second end, 2 corresponding the coupling of each resistance R, and the first end points a of part secondary side and the second end points b can be used as the data transfer group or the receiving terminal group of local area network connector.Second associate coil 323 has first input end a
1, the second input a
2, the first output b
1With the second output b
2, the first input end a of each second associate coil 323 wherein
1With the second input a
2The first end points a and the second end points b of the secondary side of difference corresponding coupling to transformer 321, and the first output b
1With the second output b
2Then be coupled to network (network 250 for example shown in Figure 2) respectively.
Surge protecting circuit 325 comprises associate coil module 326 and surging absorber element 329, wherein surging absorber element 329 tools, first end 1 and second end 2, and its first end 1 is coupled to ground.In addition; Surging absorber element 329 for example is ceramic gas discharge tube (Gas Tube), transient voltage suppresser diode (Transient Voltage Suppressor Diode; TVS), SD (Spark Gap) or piezo-resistance surge absorber (Metal Oxide Varistor Surge Absorber, MOV Surge Absorber).Associate coil module 326 has one first associate coil 328 (only schematically drawing two among Fig. 3) at least, and it has first input end a
1, the second input a
2, the first output b
1And the second output b
2, and each first input end a
1With the second input a
2The corresponding respectively center tap end c that is coupled to the secondary side of each transformer 321, and corresponding respectively simultaneously second end 2 that is coupled to each resistance R, and all first output b
1With the second output b
2All be electrically connected and be coupled to second end 2 of surging absorber element 329.
In addition; The number of first associate coil 328 is looked the number of transformer 321 and is determined, for instance, if the number of transformer 321 reduces to two; Then first associate coil, 328 numbers only need one; And the number of transformer 321 increases to six, and then the number of first associate coil 328 just need increase to three, and each center tap end c of promptly per two transformers 321 can the corresponding respectively first input end a that is coupled to first associate coil 328
1With the second input a
2
Next the above-mentioned circuit design mode that this mixed-media network modules mixed-media 300 has been described will further specify the details of operation of this example embodiment.
As shown in Figure 3; Voltage swells when surging takes place (for example being struck by lightning) makes the current rush of element internal, the big electric current that wherein arbitrary transformer 321 is produced in center tap end c; Corresponding its circuit connecting mode is when the node A that flows through, B, C or D; Wherein the part electric current can be sent to ground through resistance R, and the part electric current then can branch to first associate coil 328, and is guided to earth terminal by surging absorber element 329.Therefore the above-mentioned surge protecting circuit 325 that is made up of surging absorber element 329 can be done the energy that rises sharply buffering, consumes and its complementary energy is directed to earth terminal, therefore reduces the impact to original circuit greatly.
It should be noted that mixed-media network modules mixed-media 300 further also can comprise a plurality of network connectors 320.Shown in Figure 4 is the mixed-media network modules mixed-media local circuit sketch map of another example embodiment of the present invention.Please be simultaneously with reference to Fig. 3 and Fig. 4; The mixed-media network modules mixed-media 400 of this example embodiment comprises four group network connectors 410, four RJ45 connectors 420 and surging absorber elements 329; Wherein network connector 410 comprises four transformers 321, four second associate coils 323 and associate coil modules 326; And associate coil module 326 has two first associate coil (not shown), and its internal circuit meets the same Fig. 3 of method.In addition, the associate coil module 326 in each network connector 410 is utilized a cable 430 to be electrically connected each other, and is coupled to surging element 329.Thus; If the current rush of arbitrary network connector 410; Its part electric current just can be from associate coil module 326; And arrive surging absorber elements 329 through cable 430 and guide to earth terminal, so under the situation that the number of network connector 410 increases, mixed-media network modules mixed-media 400 of the present invention still can use single surging absorber element 329 to reach the effect of protecting all circuits.
In sum; The present invention designs known surge protecting circuit again, utilize to be coupled to first associate coil in the associate coil module with each transformer is corresponding respectively, and the other end of first associate coil is electrically connected and is coupled to a surging absorber element again and ground connection each other; So; When arbitrary transformer current increased suddenly, the electric current of part just can be directed to earth terminal through this surging absorber element, reaches the effect of protective circuit.It should be noted that; Because surge protecting circuit of the present invention only adopts single surging absorber element promptly to reach the effect of protective circuit; So reduced the cost of circuit element; In addition, surge protecting circuit of the present invention more can use with other circuit module collocation, on using, has certain compatibility.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (20)
1. the surge protecting circuit of a local area network connector is suitable for coupling a plurality of transformers that are disposed in the above-mentioned local area network connector, it is characterized in that above-mentioned surge protecting circuit comprises:
The associate coil module; Have a plurality of associate coils; And each associate coil has first input end, second input, first output and second output, and wherein the above-mentioned first input end of each above-mentioned these associate coil and above-mentioned second input couple the center tap end of the secondary side of above-mentioned these transformers respectively; And
The surging absorber element has first end and second end, the above-mentioned first end ground connection, and above-mentioned second end then directly couples above-mentioned these first outputs and above-mentioned these second outputs.
2. surge protecting circuit according to claim 1 is characterized in that, above-mentioned surging absorber element comprises ceramic gas discharge tube, transient voltage suppresser diode, SD or piezo-resistance surge absorber.
3. a local area network connector is characterized in that, comprising:
A plurality of transformers, and the secondary side of each above-mentioned these transformer comprises first end points, second end points and center tap end;
The associate coil module; Has first associate coil; And above-mentioned first associate coil has the first input end and second input, and in order to the center tap end of the secondary side that couples above-mentioned these transformers respectively, and above-mentioned first associate coil also comprises first output and second output; And
The surging absorber element has first end and second end, the above-mentioned first end ground connection, and above-mentioned second end then directly couples above-mentioned first output and above-mentioned second output of above-mentioned first associate coil.
4. local area network connector according to claim 3; It is characterized in that; Above-mentioned local area network connector also comprises a plurality of resistance; Have first end and second end respectively, and the first end ground connection of above-mentioned these resistance, and the then corresponding respectively center tap end that is coupled to the secondary side of above-mentioned these transformers of second end of above-mentioned these resistance.
5. local area network connector according to claim 4 is characterized in that, above-mentioned these first ends of above-mentioned these resistance are through a capacity earth.
6. local area network connector according to claim 3 is characterized in that, above-mentioned surging absorber element comprises ceramic gas discharge tube, transient voltage suppresser diode, SD or piezo-resistance surge absorber.
7. local area network connector according to claim 3 is characterized in that, above-mentioned first end points of the part secondary side of above-mentioned these transformers and above-mentioned second end points are in order to the data transfer group as above-mentioned local area network connector.
8. local area network connector according to claim 3 is characterized in that, above-mentioned first end points of the part secondary side of above-mentioned these transformers and above-mentioned second end points are in order to the data receiver group as above-mentioned local area network connector.
9. local area network connector according to claim 3; It is characterized in that; Above-mentioned local area network connector also comprises a plurality of second associate coils, has the first input end and second input respectively, couples above-mentioned first end points and above-mentioned second end points of the secondary side of above-mentioned these transformers with correspondence; And above-mentioned these second associate coils also have first output and second output respectively, in order to be coupled to network.
10. local area network connector according to claim 3 is characterized in that, the number of above-mentioned first associate coil in the above-mentioned associate coil module is to determine according to the number of above-mentioned these transformers.
11. local area network connector according to claim 10 is characterized in that, the number of above-mentioned these transformers is 2 times of number of above-mentioned first associate coil in the above-mentioned associate coil module.
12. a mixed-media network modules mixed-media is characterized in that, comprising:
Processing unit is in order to the transmission or the reception of management data; And
Network connector is suitable for coupling respectively network and above-mentioned processing unit, and with reception or transmission data, and above-mentioned network connector comprises:
A plurality of transformers, the primary side of each above-mentioned these transformer is coupled to above-mentioned processing unit, and the secondary side of each above-mentioned these transformer comprises first end points, second end points and center tap end;
The associate coil module; Has first associate coil; Above-mentioned first associate coil has the first input end and second input, and is coupled to the center tap end of the secondary side of above-mentioned these transformers respectively, and above-mentioned first associate coil also has first output and second output; And
The surging absorber element, its first end ground connection, its second end then directly couples above-mentioned first output and above-mentioned second output of above-mentioned first associate coil.
13. mixed-media network modules mixed-media according to claim 12; It is characterized in that; Above-mentioned mixed-media network modules mixed-media also comprises a plurality of resistance; Have first end and second end respectively, and the first end ground connection of above-mentioned these resistance, and the then corresponding respectively center tap end that is coupled to the secondary side of above-mentioned these transformers of second end of above-mentioned these resistance.
14. mixed-media network modules mixed-media according to claim 13 is characterized in that, above-mentioned these first ends of above-mentioned these resistance are through a capacity earth.
15. mixed-media network modules mixed-media according to claim 12 is characterized in that, above-mentioned surging absorber element comprises ceramic gas discharge tube, transient voltage suppresser diode, SD or piezo-resistance surge absorber.
16. mixed-media network modules mixed-media according to claim 12 is characterized in that, above-mentioned first end points of the part secondary side of above-mentioned these transformers and above-mentioned second end points are in order to the data transfer group as above-mentioned network connector.
17. mixed-media network modules mixed-media according to claim 12 is characterized in that, above-mentioned first end points of the part secondary side of above-mentioned these transformers and above-mentioned second end points are in order to the data receiver group as above-mentioned network connector.
18. mixed-media network modules mixed-media according to claim 12; It is characterized in that; Above-mentioned mixed-media network modules mixed-media also comprises a plurality of second associate coils, has the first input end and second input respectively, couples above-mentioned first end points and above-mentioned second end points of the secondary side of above-mentioned these transformers with correspondence; And above-mentioned these second associate coils also have first output and second output respectively, in order to be coupled to network.
19. mixed-media network modules mixed-media according to claim 12 is characterized in that, the number of above-mentioned first associate coil in the above-mentioned associate coil module is to determine according to the number of above-mentioned these transformers.
20. mixed-media network modules mixed-media according to claim 12 is characterized in that, the number of above-mentioned these transformers is 2 times of number of above-mentioned first associate coil in the above-mentioned associate coil module.
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| CN 200810184387 CN101752853B (en) | 2008-12-10 | 2008-12-10 | Surge protection circuit, local area network connector and network module |
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|---|---|---|---|
| CN 200810184387 CN101752853B (en) | 2008-12-10 | 2008-12-10 | Surge protection circuit, local area network connector and network module |
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| CN101752853A CN101752853A (en) | 2010-06-23 |
| CN101752853B true CN101752853B (en) | 2012-12-19 |
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|---|---|---|---|---|
| CN1549416A (en) * | 2003-05-10 | 2004-11-24 | 华为技术有限公司 | Thunder proof protective circuit for Ethernet interface |
| CN1658464A (en) * | 2004-02-21 | 2005-08-24 | 华为技术有限公司 | Protection method of multiplexer network interface and communication equipment with multiplexer network interface |
| CN101150236A (en) * | 2006-08-14 | 2008-03-26 | 技嘉科技股份有限公司 | Connector and high-voltage sudden wave protection method |
| CN201097449Y (en) * | 2007-06-12 | 2008-08-06 | 中兴通讯股份有限公司 | A lightning prevention Ethernet port circuit |
| CN201146383Y (en) * | 2007-12-10 | 2008-11-05 | 广西地凯科技有限公司 | Multiple in one surge protective machine |
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2008
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549416A (en) * | 2003-05-10 | 2004-11-24 | 华为技术有限公司 | Thunder proof protective circuit for Ethernet interface |
| CN1658464A (en) * | 2004-02-21 | 2005-08-24 | 华为技术有限公司 | Protection method of multiplexer network interface and communication equipment with multiplexer network interface |
| CN101150236A (en) * | 2006-08-14 | 2008-03-26 | 技嘉科技股份有限公司 | Connector and high-voltage sudden wave protection method |
| CN201097449Y (en) * | 2007-06-12 | 2008-08-06 | 中兴通讯股份有限公司 | A lightning prevention Ethernet port circuit |
| CN201146383Y (en) * | 2007-12-10 | 2008-11-05 | 广西地凯科技有限公司 | Multiple in one surge protective machine |
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Effective date of registration: 20140103 Address after: Taipei City, Taiwan, China Patentee after: Pegatron Corporation Address before: Taipei City, Taiwan, China Patentee before: Pegatron Corporation |