CN105634432A - G.fast low-pass filter and circuit - Google Patents
G.fast low-pass filter and circuit Download PDFInfo
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- CN105634432A CN105634432A CN201610116454.4A CN201610116454A CN105634432A CN 105634432 A CN105634432 A CN 105634432A CN 201610116454 A CN201610116454 A CN 201610116454A CN 105634432 A CN105634432 A CN 105634432A
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- inductance
- differential mode
- magnetic core
- coiling
- pass filter
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
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Abstract
The invention discloses a G-fast low-pass filter and circuit. The circuit comprises a DSL filter circuit and a common-mode choke circuit. The DSL filter circuit comprises a first differential mode inductor T1; a second differential mode inductor T2; a third differential mode inductor T3; capacitors C1, C2 and C3 which are in parallel connection with the first differential mode inductor T1, the second differential mode inductor T2 and the third differential mode inductor T3; and capacitors C4 and C5 which are in parallel connection at two sides of the second differential mode inductor T2. The common-mode choke circuit comprises a common-mode suppression choke T4, and the common-mode suppression choke T4 is connected in parallel with the capacitor C3. By this means, the G-fast low-pass filter integrates a DSL low-pass filter structure and the common-mode suppression choke, and thus the capacity for suppressing noises within a G.fast frequency band is promoted.
Description
Technical field
The present invention relates to filter field technology, refer in particular to a kind of G.fast low-pass filter and circuit.
Background technology
On December 5th, 2014, Union Internationale des Telecommunications (ITU) completes the last examination of G.fast standard, as the new edition IEEE 802.7 of ITU, G.fast can utilize telephone wire to realize the transfer rate of the highest 1Gbps, can not only effectively reduce operator to the dependence of fiber to the home (FTTH) technology, input cost of arranging net can also be reduced simultaneously.
Along with the fast development of super clear Internet video, the big contour bandwidth Internet service of data, broadband access faces huge challenge. In access in radio, the broadband access technology of main flow is just progressively to the FTTH(fiber to the home of gigabit access) transition. Present situation is in some ripe communities promote, and is all adopt DSL(digital subscriber line owing to the family in these places is originally general) technology access, it may also be useful to be telephone wire online. If adopting FTTH, fiber reforming certainly will be carried out. And fiber to the home often meets with the resistance from property, cannot launch smoothly to dispose.
Meanwhile, connecting up, for finishing, the family that put in place, optical fiber is registered one's residence and connected up also is the pretty troublesome thing of part. On the other hand, for operator, fiber to the home also can allow the copper cash resource having carried out great amount of investment waste, and is unfavorable for investment protection. And the appearance of G.fast technology can effectively solve the problem. The DSL standard that this is released by Union Internationale des Telecommunications can allow short distance telephone wire (30 to 400 meters) realize the speed up to 1Gbps. Moreover, G.fast technology is also much lower than FTTH on deployment cost.
ITU secretary general DrHamadounI.Tour �� represents, is transitioned into cloth from standard and builds, and G.fast can say it is broadband access technology recently with fastest developing speed. At present, a series of manufacturers has taken up the chipset in correlation technique and equipment shipment, and the simultaneously experiment of network service supplier and on-the-spot test are also in expansion.
G.fast at optical fiber under distribution point (FTTdp) framework, combine speed and the DSL(digital subscriber line of optical fiber) advantage installed, for example, within the scope of the networking of 400 meters, this technology can provide the transmission speed being equivalent to optical fiber, add the characteristic allowing client install voluntarily, allow service supplier be saved cost, for user provides better experience.
In addition, G.fast energy and existing VDSL2(s-generation superelevation digital subscriber line) and deposit, promote the handiness that client exchanges between two technology, it is not necessary to worry problem compatible with prior art.
G.fast further increases the feasibility of the wide intensive services of frequency of arranging net, and such as supports the string stream service of superelevation image quality 4K or 8K, supports next generation's Web TV (IPTV) access, and can promote the data storage and high image quality audio-visual communication etc. on basis, high in the clouds further. In addition, G.fast also can provide service for middle-size and small-size broadband passage demand, can be applicable in the micro radio honeycomb base station of backhaul (Backhaul) network and WLAN (Wi-Fi) focus simultaneously.
Based on this, the wave filter coordinating the development of new technology to develop G.fast fast is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose is to provide a kind of G.fast low-pass filter and circuit, and it is integrated with DSL low-pass filter structure and common mode inhibition inductance, improve in G.fast frequency band to the rejection ability of noise.
For achieving the above object, the present invention adopts following technical scheme:
A kind of G.fast low-pass filter circuit, is applied on G.fast local side exchange board, comprises
One DSL filtering circuit, comprise the first differential mode inductance T1, the 2nd differential mode inductance T2 and the 3rd differential mode inductance T3, and electric capacity C1, C2, the C3 in parallel with the first differential mode inductance T1, the 2nd differential mode inductance T2, the 3rd differential mode inductance T2, and it is parallel to electric capacity C4, C5 of the both sides of the 2nd differential mode inductance T2;
One common mode chokes circuit, comprises common mode inhibition inductance T4, and this common mode inhibition inductance is parallel to electric capacity C3.
As a kind of preferred version, described first differential mode inductance, the 2nd differential mode inductance, the 3rd differential mode inductance have two bursts of coilings respectively, are namely the first coiling and the 2nd coiling, and this first coiling, the 2nd coiling are around on same first magnetic core (30).
As a kind of preferred version, described common mode inhibition inductance has two bursts of anti-current coilings, and these two bursts of anti-current coilings are wrapped on same 2nd magnetic core (40) respectively.
A kind of G.fast low-pass filter, based on G.fast low-pass filter circuit according to claim 1, comprise main support (50), it is installed on the circuit card bottom main support (60), it is installed on above main support and the first magnetic core (30), 2nd magnetic core (40), first differential mode inductance T1 of described DSL filtering circuit (10), 2nd differential mode inductance T2, first coiling of the 3rd differential mode inductance T3 and the 2nd coiling are around being wound on this first magnetic core (30), two bursts of anti-current coilings of the common mode inhibition inductance T4 of common mode chokes circuit (20) are wound on the 2nd magnetic core (40).
As a kind of preferred version, described first magnetic core is square, is that horizontal is arranged, and the 2nd magnetic core is annular, is erect-type setting, and the 2nd magnetic core is positioned at by the first magnetic core side, and the top of the 2nd magnetic core is higher than the first magnetic core.
As a kind of preferred version, the inductance of described first magnetic core (30) has four, it is arranged in same plane, wherein, first inductance (31) forms the first coiling T11 of the first differential mode inductance T1,2nd inductance (32) forms the 2nd coiling T12 of the first differential mode inductance T1, two gangs of coiling T21 and T22 of the 3rd inductance (33) composition the 2nd differential mode inductance T2, two gangs of coiling T31 and T32 of the 4th inductance (34) composition the 3rd differential mode inductance T3.
As a kind of preferred version, the both sides of described main support (50) are provided with through hole (51), connect weldering pin (52) in through hole, and main support (50) and circuit card (60) were worn in weldering, stretched out below circuit card.
The present invention compared with prior art has obvious advantage and useful effect, specifically, as shown from the above technical solution, DSL low-pass filter structure and common mode inhibition inductance it is integrated with due to G.fast low-pass filter, this design solves following problem 1) relative to tradition DSL low-pass filter device, Phone end is expanded to 106MHz and higher to Line end isolate bands by this G.fast wave filter, common mode noise in frequency band is had good restraining effect simultaneously. 2) relative to traditional DSL low-pass filter, this G.fast wave filter can resistance to large scale drift, take into account low power consumption, remain with on the basis of iron core lamination simultaneously, be integrated with minimum size.
For more clearly setting forth constitutional features and effect of the present invention, below in conjunction with accompanying drawing and specific embodiment, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is the schematic circuit of the G.fast low-pass filter of embodiments of the present invention.
Fig. 2 is the structure iron of the G.fast low-pass filter of embodiments of the present invention.
Fig. 3 is the G.fast low-pass filter front view of embodiments of the present invention.
Drawing reference numeral:
10, DSL filtering circuit 20, common mode chokes circuit
30, the first magnetic core 31, first inductance
32, the 2nd inductance 33, the 3rd inductance
34, the 4th inductance 40, the 2nd magnetic core
50, main support 51, through hole
52, pin 60, circuit card is welded.
Embodiment
Please refer to shown in Fig. 1 and Fig. 3, that show the concrete structure of the better embodiment of the present invention, be a kind of G.fast low-pass filter circuit, be applied on G.fast local side exchange board, comprise DSL filtering circuit 10 and a common mode chokes circuit 20.
Wherein, this DSL filtering circuit 10 is connected on Line end and xDSL end, comprise the first differential mode inductance T1, the 2nd differential mode inductance T2 and the 3rd differential mode inductance T3, and electric capacity C1, C2, the C3 in parallel with the first differential mode inductance T1, the 2nd differential mode inductance T2, the 3rd differential mode inductance T2, and it is parallel to electric capacity C4, C5 of the both sides of the 2nd differential mode inductance T2. Concrete, described first differential mode inductance, the 2nd differential mode inductance, the 3rd differential mode inductance have two bursts of coilings respectively, namely it is the first coiling, the 2nd coiling (T11 and T12, T21 and T22, T31 and T32), and this first coiling, the 2nd coiling are around on same first magnetic core 30. Mainly as digital/analog signal isolation and impedance matching.
This common mode chokes circuit 20 is connected on Phone end, comprises common mode inhibition inductance T4, and this common mode inhibition inductance is parallel to electric capacity C3. Concrete, described common mode inhibition inductance has two bursts of anti-current coilings (T41 and T42), and these two bursts of anti-current coilings are wrapped on same 2nd magnetic core 40 respectively, to suppress the common mode noise on telephone line.
See shown in Fig. 2 and Fig. 3, the structure of G.fast low-pass filter comprises main support 50, be installed on the circuit card 60 bottom main support 50, be installed on above main support 50 and the coiling coiling of the first differential mode inductance T1 of DSL filtering circuit 10, the 2nd differential mode inductance T2 and the 3rd differential mode inductance T3 on the first magnetic core 30, the 2nd magnetic core 40, this first magnetic core, the coiling of the common mode inhibition inductance T4 of coiling common mode chokes circuit 20 on the 2nd magnetic core 40.
Concrete, this first magnetic core 30 is square, is that horizontal is arranged, and the 2nd magnetic core 40 is annular, is erect-type setting, and the 2nd magnetic core 40 is positioned at by the first magnetic core 30 side, and the top of the 2nd magnetic core 40 is higher than the first magnetic core 30. In the present embodiment, the inductance of described first magnetic core 30 has four, four inductance are arranged in same plane, wherein, first inductance 31 forms the first coiling T11 of the first differential mode inductance T1,2nd inductance 32 forms the 2nd coiling T12 of the first differential mode inductance T1, and the 3rd inductance 33 forms two gangs of coiling T21 and T22 of the 2nd differential mode inductance T2, and the 4th inductance 34 forms two gangs of coiling T31 and T32 of the 3rd differential mode inductance T3. Anti-current coiling T41 and T42 of described 2nd magnetic core 40 winding common mode inhibition inductance T4. The both sides of main support 50 are provided with through hole 51, connect weldering pin 52 in through hole, and main support 50 and circuit card 60 were worn in weldering, stretched out below circuit card.
In sum, the design focal point of the present invention is, DSL low-pass filter structure and common mode inhibition inductance it is integrated with due to G.fast low-pass filter, this design solves following problem 1) relative to tradition DSL low-pass filter device, Phone end is expanded to 106MHz and higher to Line end isolate bands by this G.fast wave filter, common mode noise in frequency band is had good restraining effect simultaneously. 2) relative to traditional DSL low-pass filter, this G.fast wave filter can resistance to large scale drift, take into account low power consumption, remain with on the basis of iron core lamination simultaneously, be integrated with minimum size.
The above, it it is only the better embodiment of the present invention, not the technical scope of the present invention is imposed any restrictions, therefore every any trickle amendment, equivalent variations and modification above embodiment done according to the technical spirit of the present invention, all still belong in the scope of technical solution of the present invention.
Claims (7)
1. a G.fast low-pass filter circuit, is applied on G.fast local side exchange board, it is characterised in that: comprise
One DSL filtering circuit, comprise the first differential mode inductance T1, the 2nd differential mode inductance T2 and the 3rd differential mode inductance T3, and electric capacity C1, C2, the C3 in parallel with the first differential mode inductance T1, the 2nd differential mode inductance T2, the 3rd differential mode inductance T2, and it is parallel to electric capacity C4, C5 of the both sides of the 2nd differential mode inductance T2;
One common mode chokes circuit, comprises common mode inhibition inductance T4, and this common mode inhibition inductance is parallel to electric capacity C3.
2. G.fast low-pass filter circuit according to claim 1, it is characterized in that: described first differential mode inductance, the 2nd differential mode inductance, the 3rd differential mode inductance have two bursts of coilings respectively, namely it is the first coiling and the 2nd coiling, and this first coiling, the 2nd coiling are around on same first magnetic core (30).
3. G.fast low-pass filter circuit according to claim 1, it is characterised in that: described common mode inhibition inductance has two bursts of anti-current coilings, and these two bursts of anti-current coilings are wrapped on same 2nd magnetic core (40) respectively.
4. a G.fast low-pass filter, it is characterized in that: based on G.fast low-pass filter circuit according to claim 1, comprise main support (50), it is installed on the circuit card bottom main support (60), it is installed on above main support and the first magnetic core (30), 2nd magnetic core (40), first differential mode inductance T1 of described DSL filtering circuit (10), 2nd differential mode inductance T2, first coiling of the 3rd differential mode inductance T3 and the 2nd coiling are around being wound on this first magnetic core (30), two bursts of anti-current coilings of the common mode inhibition inductance T4 of common mode chokes circuit (20) are wound on the 2nd magnetic core (40).
5. G.fast low-pass filter according to claim 4, it is characterized in that: described first magnetic core is square, it is that horizontal is arranged, 2nd magnetic core is annular, it it is erect-type setting, 2nd magnetic core is positioned at by the first magnetic core side, and the top of the 2nd magnetic core is higher than the first magnetic core.
6. G.fast low-pass filter according to claim 4 or 5, it is characterized in that: the inductance of described first magnetic core (30) has four, it is arranged in same plane, wherein, first inductance (31) forms the first coiling T11 of the first differential mode inductance T1,2nd inductance (32) forms the 2nd coiling T12 of the first differential mode inductance T1, two gangs of coiling T21 and T22 of the 3rd inductance (33) composition the 2nd differential mode inductance T2, two gangs of coiling T31 and T32 of the 4th inductance (34) composition the 3rd differential mode inductance T3.
7. G.fast low-pass filter according to claim 4, it is characterised in that: the both sides of described main support (50) are provided with through hole (51), connect weldering pin (52) in through hole, and main support (50) and circuit card (60) were worn in weldering, stretched out below circuit card.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610116454.4A CN105634432B (en) | 2016-03-02 | 2016-03-02 | G.fast low-pass filter and circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610116454.4A CN105634432B (en) | 2016-03-02 | 2016-03-02 | G.fast low-pass filter and circuit |
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| CN105634432A true CN105634432A (en) | 2016-06-01 |
| CN105634432B CN105634432B (en) | 2019-02-05 |
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| CN201610116454.4A Active CN105634432B (en) | 2016-03-02 | 2016-03-02 | G.fast low-pass filter and circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019212970A1 (en) * | 2018-05-01 | 2019-11-07 | Linear Technology Holding Llc | Power over data lines system using split or coupled cmcs and dmcs for coupling dc voltage and attenuating common mode noise |
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| JP2006352217A (en) * | 2005-06-13 | 2006-12-28 | Hitachi Ferrite Electronics Ltd | Low pass filter for dsl |
| CN101154963A (en) * | 2006-09-30 | 2008-04-02 | 卓智电子股份有限公司 | Voice separating device with low-pass filtering compensation circuit |
| CN101170619A (en) * | 2006-10-27 | 2008-04-30 | 卓智电子股份有限公司 | Voice separating device |
| CN101742016A (en) * | 2008-11-07 | 2010-06-16 | 卓智电子股份有限公司 | Voice separating device |
| CN202353653U (en) * | 2011-12-22 | 2012-07-25 | 惠州三盛电子有限公司 | XDSL (x Digital Subscriber Line) voice splitter |
| CN205490443U (en) * | 2016-03-02 | 2016-08-17 | 绵阳普思电子有限公司 | G. fast low pass filter and circuit |
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2016
- 2016-03-02 CN CN201610116454.4A patent/CN105634432B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006352217A (en) * | 2005-06-13 | 2006-12-28 | Hitachi Ferrite Electronics Ltd | Low pass filter for dsl |
| CN101154963A (en) * | 2006-09-30 | 2008-04-02 | 卓智电子股份有限公司 | Voice separating device with low-pass filtering compensation circuit |
| CN101170619A (en) * | 2006-10-27 | 2008-04-30 | 卓智电子股份有限公司 | Voice separating device |
| CN101742016A (en) * | 2008-11-07 | 2010-06-16 | 卓智电子股份有限公司 | Voice separating device |
| CN202353653U (en) * | 2011-12-22 | 2012-07-25 | 惠州三盛电子有限公司 | XDSL (x Digital Subscriber Line) voice splitter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019212970A1 (en) * | 2018-05-01 | 2019-11-07 | Linear Technology Holding Llc | Power over data lines system using split or coupled cmcs and dmcs for coupling dc voltage and attenuating common mode noise |
| US10594519B2 (en) | 2018-05-01 | 2020-03-17 | Linear Technology Holding Llc | Power over data lines system using pair of differential mode chokes for coupling DC voltage and attenuating common mode noise |
| US10652050B2 (en) | 2018-05-01 | 2020-05-12 | Linear Technology Holding Llc | Power over data lines system using split or coupled CMCs and DMCs for coupling DC voltage and attenuating common mode noise |
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| CN105634432B (en) | 2019-02-05 |
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Effective date of registration: 20170327 Address after: 621000 Sichuan city of Mianyang province Mianyang export processing zone, hi tech Industrial Development Zone pulse Electronics Co. Ltd. Applicant after: Mianyang Pusi Electronic Co., Ltd. Applicant after: Huawei Technologies Co., Ltd. Address before: 621000 Sichuan city of Mianyang province Mianyang export processing zone, hi tech Industrial Development Zone pulse Electronics Co. Ltd. Applicant before: Mianyang Pusi Electronic Co., Ltd. |
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