CN107395474A - A kind of integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices - Google Patents
A kind of integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices Download PDFInfo
- Publication number
- CN107395474A CN107395474A CN201710794738.3A CN201710794738A CN107395474A CN 107395474 A CN107395474 A CN 107395474A CN 201710794738 A CN201710794738 A CN 201710794738A CN 107395474 A CN107395474 A CN 107395474A
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- inductance
- filter circuit
- excessively stream
- power supply
- fttx
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/2878—Access multiplexer, e.g. DSLAM
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Filters And Equalizers (AREA)
Abstract
Registered one's residence field the present invention relates to FTTx copper cables, a kind of more particularly to integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices, the device also includes the first excessively stream filter circuit, second excessively stream filter circuit and high-frequency filter circuit, direct-connected first signal transmission interface of first excessively stream filter circuit, the direct-connected secondary signal coffret of second excessively stream filter circuit, high-frequency filter circuit is arranged between the first excessively stream filter circuit and the second excessively stream filter circuit, first excessively stream filter circuit is by the first inductance and the second inductance that are serially connected, second excessively stream filter circuit is by the 3rd inductance and the 4th inductance or only the 4th inductance.The device completes the reverse power supply of G.fast equipment, has been also compatible with xDSL working frequency, finally also ensure that the G.fast equipment working frequency of itself, can also ensure that signal transmission mouth working frequency reaches 1100Mhz.
Description
Technical field
Registered one's residence field the present invention relates to FTTx copper cables, more particularly to a kind of integrated G.fast reverse power supply compatibility xDSL
FTTx copper cable entering devices.
Background technology
FTTx：(Fiber-to-the-x) it is Optical Fiber Subscriber Access Network of new generation, for connecting telecom operators and end
End subscriber.Wherein FTTH fiber to the home, FTTP FTTPs, FTTN fiber-to-the-nodes, FTTO Fiber-To-The-Offices, FTTSA
Fiber-to-the-service-area etc..
G.fast：It is an International Telecommunication Union ITU standardization suggestion, it is therefore an objective in the copper cash no more than 250m length
On reach the speed of optical fiber, i.e., more than 1Gbit/s, compared to fiber to the home, it also has the advantage in cost.G.fast can utilize electricity
Words line realizes highest 1Gbps transmission rate, can not only effectively reduce operator to fiber to the home FTTH) dependence of technology, together
When can also reduce input cost of arranging net, the G.fast high band starting stage can use 106MHz, and future extends to 212MHz.
Reverse power supply：Service provider is realized from user family by telephone wire and G.fast allocation units is reversely supplied
Electricity, operator require that producing cause is without seeking similar ditching winding displacement etc. in terms of municipal administration again for the problem of power supply：Due to
G.fast technical works frequency is high, and loop length is shorter, and it is even hundreds of inevitably to dispose dozens of in delivery region
G.fast systems.These systems need upper electricity, and because equipment will be closer to user, therefore the power taking of equipment installation site can
Be able to can have difficulties, for this, G.fast equipment will be using terminal user family nearby, telephone wire) by the way of reverse power supply.
xDSL：All kinds DSL (Digital Subscriber Line) digital subscriber line) general name, including
ADSL, RADSL, VDSL, SDSL, IDSL and HDSL etc., ADSL use 4kHz to 1.1MHz frequency ranges, and ADSL2+ technologies pass through work
Working frequency expands to 2.2MHz from 1.1MHz, and VDSL2 working frequency is 17MHz or 30MHz.
Such as Fig. 1, at practical application end, general terminal G.fast is passive circuit, but local side G.fast equipment typically needs
Power, therefore product needs to match somebody with somebody power supply circuit, and because of equipment relatively close to user, therefore the power taking of equipment installation site can
It is able to can have difficulties, for this, G.fast equipment will be by the way of reverse power supply.
The content of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of integrated G.fast reverse power supply is compatible
XDSL FTTx copper cable entering devices, the device complete the reverse power supply of G.fast equipment, have been also compatible with xDSL work frequency
Rate, finally also ensure that the G.fast equipment working frequency of itself, can also ensure that signal transmission mouth working frequency reaches
1100Mhz。
In order to realize above-mentioned purpose, present invention employs following technical scheme：
A kind of integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices, the device include the first signal
Coffret, protection Bi-directional filter circuit, G.fast baluns, the first filter circuit, the second filter circuit and secondary signal transmission
Interface, the first signal transmission interface, protection Bi-directional filter circuit and G.fast baluns are sequentially connected in series, the first filter circuit and second
Filter circuit is parallel with one another to be arranged between G.fast baluns and secondary signal coffret, and the device also includes the first excessively stream and filtered
Wave circuit, the second excessively stream filter circuit and high-frequency filter circuit, direct-connected first signal transmission interface of the first excessively stream filter circuit, the
The direct-connected secondary signal coffret of two excessively stream filter circuits, high-frequency filter circuit are arranged on the first excessively stream filter circuit and the second mistake
Between flowing filter circuit, the first excessively stream filter circuit is by the first inductance and the second inductance that are serially connected, the second excessively stream filtered electrical
It route the 3rd inductance and the 4th inductance or only the 4th inductance being serially connected.
Preferably, the first inductance and the second inductance, which are added inductance value, is more than 10 ± 20%uH, inductance value is bigger in theory
Better, the first described inductance and the second inductance are added 32 ± 20%uH of inductance value value.
Preferably, the 3rd inductance and the 4th inductor combination, which are added inductance value, is more than 10 ± 20%uH, inductance value in theory
It is the bigger the better, preferably, the 3rd described inductance and the 4th inductor combination are added inductance value 32 ± 20%uH of value, only the
22 ± 20%uH of value during four inductance.So as to compatible xDSL working frequency range.
Preferably, the high-frequency signal that described high-frequency filter circuit filters out must flow to GND systems.Purpose was
Filter the spurious signal beyond current signal.
Preferably, the first described inductance and the 3rd inductance use rod core wire-wound inductor, control DCR ＜ 25m Ω
With Heat Rating current ＞ 1A, coiling takes segmentation coiling, every section of welding kesistance, is analyzed and pressed down with Laplace transform
High-frequency oscillation voltage UL processed(s)=SLIL(s)-LiL(0_), limitation oscillating current IL(s)=UL(s)/R；It is another to realize that parasitic capacitance is segmented
For C1、C2…Cn；Cn ＜ Cs, (CsFor the parasitic capacitance of unsegmented inductance), C1、C2... Cn is serially connected, i.e., whole inductance parasitic
Electric capacity is Min { C1、C2... Cn }, needed to control parasitic capacitance size according to circuit；N zero point is introduced after segmentation in passband function,
For improving passband fluctuation and starting, cut off loss.
Preferably, described the second inductance and the 4th inductance uses power inductance, make Ln ≈ aLn-1+bLn-2, reduce
M12And M21Mutual inductance, and DCR ＜ 100m Ω and Heat Rating current ＞ 1A.
Preferably, the first described excessively stream filter circuit, the second excessively stream filter circuit and high-frequency filter circuit, work as direct current
0.5A's preferably, the described device is provided with radome.When ensureing product working status, EMI can meet that electronics produces
Product requirement.
The direct-connected first signal transmission mouth of of the invention first used first-class filter circuit and the second excessively stream filter circuit direct-connected the
Binary signal transmits mouth, the characteristic of the excessively first-class filter circuit of utilization and the second excessively stream filter circuit, only allow low frequency signal or
Direct current by, high impedance is presented with exchanging for high-frequency signal, make it is most of can not be by, allow big portion with device selecting frequency characteristic
Divide high-frequency signal and exchange from protection+Bi-directional filter circuit and the second filter circuit by the way that increase isolation is electric according to being actually needed
Pressure characteristic allows voltage can not be by protection+Bi-directional filter circuit and the second filter circuit.
First-class filter circuit and the second excessively stream filter circuit direct current by when, the spurious signal beyond electric signal is (high
Frequency signal) also can partly it leak through, only by the high-frequency resistance characteristic effect of first-class filter circuit and the second excessively stream filter circuit
Unobvious, the result of presentation is that spuious decay is generally -10dB~-20dB, now needs to increase high-frequency filter circuit, filters out height
Frequency spurious signal, spuious decay is reached an industry and is compared value -40dB~-50dB stray powers of approval and be attenuated 10000
Times)
In order to ensure that high-frequency signal can be most of by the two electricity from protection+Bi-directional filter circuit and the second filter circuit
Road requires logical high frequency resistance low frequency, that is, passes throughCalculate control), then the first excessively stream filter circuit and high-frequency filter circuit group
Into filter circuit Y1 over the ground, the second excessively stream filter circuit and high-frequency filter circuit composition filter circuit Y2, Y1 and Y2 over the ground
All it is made up of inductance series capacitance, so quality factorL1, R1, L2, R2 are in both
It is determined that amount, C1 and C2 are respectively Y1 and Y2 series capacitance, general high-frequency filter circuit electric capacity is bigger, so C1 and C2 are by mistake
The parasitic capacitance for flowing filter circuit and the second excessively stream filter circuit determines that parasitic capacitance is smaller, Y1 and Y2 circuit Q factors are got over
Height, due to first-class filter circuit and the second excessively stream filter circuit parasitic capacitance series relationship, and the second inductance and the 4th inductance
For fixed inductance, thus we can improved part be the first inductance and the 3rd inductance, then the first inductance and the 3rd inductance component
For Primary Component, to meet to concentrate in magnetic core direction using most of rod core wire-wound inductor, magnetic field, effectively shield EMI
Interference, can separately control DCR ＜ 25m Ω and Heat Rating current ＞ 1A, and segmentation coiling, every section of welding are taken in coiling
Resistance, it can then suppress high-frequency oscillation voltage UL with Laplace transform analysis(S)=SLIL(s)-LiL(0_), limit oscillating current
IL(s)=UL(S)/R；Separately achievable parasitic capacitance is segmented into C1、C2…Cn；Cn ＜ CS(CSFor the parasitic capacitance of unsegmented inductance),
C1、C2... Cn is serially connected, i.e., whole inductance parasitic electric capacity is Min { C1、C2... Cn }, needed that parasitism can be controlled according to circuit
Capacitance size；N zero point is introduced after segmentation in passband function, for improving passband fluctuation and starting, cut off loss.The present invention
Can ensure that high-frequency signal highest signal can arrive 1100MHz) with higher quality from protection+Bi-directional filter circuit and the second filtered electrical
Road passes through.
Because signal transmission mouth needs compatible xDSL, then high-frequency signal will can be by due to height comprising 10KHz~30Mhz
Frequency impedance XL=2 π fL, f are reduced to 10KHz from 1000MHz, then require that L increases, due to protection+Bi-directional filter circuit and second
Some more than filter circuit needs satisfaction characteristics also need to compatible wire winding, small product size etc., and some are required, we utilize
The characteristic of series inductance and the influence of mutual inductance, connected respectively behind the first inductance and the 3rd inductance the second inductance and the 4th electricity
Sense, the second inductance and the 4th inductance, are concentrated in magnetic core direction using most of power inductance, small volume, magnetic field, effectively shielding
EMI is disturbed, and makes Ln ≈ aLn-1+bLn-2, reduce M12And M21Mutual inductance, the linear relationship of Tandem devices can be ensured as far as possible, be easy to set
Meter, and DCR ＜ 100m Ω and Heat Rating current ＞ 1A, in theory inductance value be the bigger the better, according to actual conditions sheet
22 ± 20%uH of invention value.Certainly can typically be reduced because work frequency according to practical application, secondary signal transmission mouth requirement
Rate is up to 212MHz), it is possible to the 4th inductance is only needed according to actual conditions and customer authentication.
For the present invention as a result of above-mentioned technical scheme, the device completes the reverse power supply of G.FAST equipment, also simultaneous
XDSL working frequency is held, finally also ensure that the G.fast equipment working frequency of itself, can also ensure that signal transmits mouth work
Working frequency reaches 1100Mhz.
Brief description of the drawings
Fig. 1 is G.fast passive circuits schematic diagram in FTTx.
Fig. 2 is the overall schematic that G.fast reverse power supply compatibility xDSL is designed in FTTx of the present invention.
Embodiment
A kind of integrated G.fast reverse power supply compatibility xDSL as shown in Figure 1 FTTx copper cable entering devices, the device
Including the first signal transmission interface, protection+Bi-directional filter circuit 5, G.fast baluns 6, the first filter circuit 7, the second filtered electrical
Road 8 and secondary signal coffret, the first signal transmission interface, protection+Bi-directional filter circuit 5 and G.fast baluns 6 are gone here and there successively
Connection, the first filter circuit 7 and the second filter circuit 8 it is parallel with one another be arranged on G.fast baluns 6 and secondary signal coffret it
Between, at practical application end, general terminal G.fast is passive circuit, but local side G.fast equipment generally requires power supply, therefore
Product needs to match somebody with somebody power supply circuit, and because of equipment relatively close to user, therefore the power taking of equipment installation site may be in the presence of tired
Difficulty, for this, G.fast equipment will be by the way of reverse power supply.
Therefore, as shown in Fig. 2 the device adds the first excessively stream filter circuit 3, the second excessively stream filter circuit 4 and high frequency
Filter circuit 2,3 direct-connected first signal transmission interface of the first excessively stream filter circuit, 4 direct-connected secondary signal of the second excessively stream filter circuit
Coffret, high-frequency filter circuit 2 are arranged between the first excessively stream filter circuit 3 and the second excessively stream filter circuit 4, the first excessively stream
Filter circuit 3 is powered up by the first inductance 3-1 being serially connected and the second inductance 3-2, the first inductance 3-1 and the second inductance 3-2 phases
32 ± 20%uH of inductance value value.Second excessively stream filter circuit 4 is by the electricity of the 3rd inductance 4-1 and the 4th inductance 4-2 or the only the 4th
When feeling 4-2, the 3rd inductance 4-1 and the 4th inductance 4-2 combination addition inductance value 32 ± 20%uH of value, only the 4th inductance 4-2
22 ± 20%uH of value.
As shown in Fig. 2 the high-frequency signal that described high-frequency filter circuit 2 filters out must flow to GND systems.Purpose is
Filter out the spurious signal beyond current signal.
The first above-mentioned inductance 3-1 and the 3rd inductance 4-1 concentrates on magnetic using most of rod core wire-wound inductor, magnetic field
In core direction, EMI interference is effectively shielded, can separately control DCR ＜ 25m Ω and Heat Rating current ＞ 1A, coiling is adopted
Segmentation coiling is taken, every section of welding kesistance, can then suppress high-frequency oscillation voltage UL with Laplace transform analysis(S)=SLIL(s)-
LiL(0_), limitation oscillating current IL(s)=UL(S)/R；Separately achievable parasitic capacitance is segmented into C1、C2…Cn；Cn ＜ CS(CSNot divide
The parasitic capacitance of section inductance), C1、C2... Cn is serially connected, i.e., whole inductance parasitic electric capacity is Min { C1、C2... Cn }, according to electricity
Road needs that parasitic capacitance size can be controlled；N zero point is introduced after segmentation in passband function, for improving passband fluctuation and rising
Begin, cut off loss.
The second above-mentioned inductance 3-2 and the 4th inductance 4-2 uses power inductance, and small volume, most of magnetic field concentrates on magnetic
In core direction, EMI interference is effectively shielded, makes Ln ≈ aLn-1+bLn-2, reduce M12And M21Mutual inductance, Tandem devices can be ensured as far as possible
Linear relationship, be easy to design, and DCR ＜ 100m Ω and Heat Rating current ＞ 1A, in theory inductance value it is more big more
It is good, according to actual conditions 22 ± 20%uH of value of the present invention.
Above-mentioned the first excessively stream filter circuit 3, the second excessively stream filter circuit 4 and high-frequency filter circuit 2, when direct current 0.5A's
When, whole excessively stream system power dissipation is not more than 0.125W.Because whole product electron radiation device is more, we finally install
Radome 1, meet electronic product EMI requirements.
Claims (9)
1. a kind of integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices, the device passes including the first signal
Defeated interface, protection+Bi-directional filter circuit (5), G.fast baluns (6), the first filter circuit (7), the second filter circuit (8) and
Binary signal coffret, the first signal transmission interface, protection+Bi-directional filter circuit (5) and G.fast baluns (6) are sequentially connected in series,
First filter circuit (7) and the second filter circuit (8) is parallel with one another is arranged on G.fast baluns (6) and secondary signal coffret
Between, it is characterised in that the device also includes the first excessively stream filter circuit (3), the second excessively stream filter circuit (4) and High frequency filter
Circuit (2), the first direct-connected first signal transmission interface of excessively stream filter circuit (3), direct-connected second letter of the second excessively stream filter circuit (4)
Number coffret, high-frequency filter circuit (2) are arranged between the first excessively stream filter circuit (3) and the second excessively stream filter circuit (4),
First excessively stream filter circuit (3) is by the first inductance (3-1) and the second inductance (3-2) that are serially connected, the second excessively stream filter circuit
(4) by the 3rd inductance (4-1) being serially connected and the 4th inductance (4-2) or only the 4th inductance (4-2).
2. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the first inductance (3-1), which is added inductance value with the second inductance (3-2), is more than 10 ± 20%uH, the 3rd inductance (4-1)
Inductance value, which is added, with the combination of the 4th inductance (4-2) is more than 10 ± 20%uH.
3. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the first inductance (3-1) is added 32 ± 20%uH of inductance value value with the second inductance (3-2).
4. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the 3rd inductance (4-1) is added inductance value 32 ± 20%uH of value, only the 4th with the combination of the 4th inductance (4-2)
22 ± 20%uH of value during inductance (4-2).
5. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the high-frequency signal that described high-frequency filter circuit (2) filters out must flow to GND systems.
6. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the first inductance (3-1) and the 3rd inductance (4-1) use rod core wire-wound inductor, control DCR ＜ 25m Ω and
Heat Rating current ＞ 1A, coiling take segmentation coiling, every section of welding kesistance, are analyzed and suppressed with Laplace transform
High-frequency oscillation voltage UL(S)=SLIL(s)-LiL(0_), limitation oscillating current IL(s)=UL(S)/R；Separately realize that parasitic capacitance is segmented into
C1、C2…Cn；Cn ＜ CS (CS is the parasitic capacitance of unsegmented inductance), C1、C2... Cn is serially connected, i.e., whole inductance parasitic electricity
Hold for Min { C1、C2... Cn }, needed to control parasitic capacitance size according to circuit；N zero point is introduced after segmentation in passband function, is used
In improvement passband fluctuation and starting, cut off loss.
7. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the second inductance (3-2) and the 4th inductance (4-2) use power inductance, make Ln ≈ aLn-1+bLn-2, reduce M12
With M21 mutual inductances, and DCR ＜ 100m Ω and Heat Rating current ＞ 1A.
8. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the first excessively stream filter circuit (3), the second excessively stream filter circuit (4) and high-frequency filter circuit (2), work as direct current
When 0.5A, whole excessively stream system power dissipation is not more than 0.125W.
9. a kind of integrated G.fast reverse power supply compatibility xDSL according to claim 1 FTTx copper cable entering devices,
Characterized in that, the device is provided with radome (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710794738.3A CN107395474A (en) | 2017-09-06 | 2017-09-06 | A kind of integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710794738.3A CN107395474A (en) | 2017-09-06 | 2017-09-06 | A kind of integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices |
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| Publication Number | Publication Date |
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| CN107395474A true CN107395474A (en) | 2017-11-24 |
Family
ID=60349281
Family Applications (1)
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|---|---|---|---|
| CN201710794738.3A Withdrawn CN107395474A (en) | 2017-09-06 | 2017-09-06 | A kind of integrated G.fast reverse power supply compatibility xDSL FTTx copper cable entering devices |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322369A (en) * | 2018-01-30 | 2018-07-24 | 烽火通信科技股份有限公司 | A kind of method and device for realizing G.FAST accesses on copper wire and optical fiber |
| CN109039659A (en) * | 2018-06-13 | 2018-12-18 | 普联技术有限公司 | G.fast reverse power supply system, terminal device and local side apparatus |
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| CN108322369A (en) * | 2018-01-30 | 2018-07-24 | 烽火通信科技股份有限公司 | A kind of method and device for realizing G.FAST accesses on copper wire and optical fiber |
| CN109039659A (en) * | 2018-06-13 | 2018-12-18 | 普联技术有限公司 | G.fast reverse power supply system, terminal device and local side apparatus |
| CN109039659B (en) * | 2018-06-13 | 2021-06-04 | 普联技术有限公司 | Fast reverse power supply system and local side equipment |
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