CN1863178A - Impedance regulating device and communication system containing same - Google Patents
Impedance regulating device and communication system containing same Download PDFInfo
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- CN1863178A CN1863178A CN 200610072739 CN200610072739A CN1863178A CN 1863178 A CN1863178 A CN 1863178A CN 200610072739 CN200610072739 CN 200610072739 CN 200610072739 A CN200610072739 A CN 200610072739A CN 1863178 A CN1863178 A CN 1863178A
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Abstract
The invention relates to an impedance regulating device and the communication system thereof. And the impedance regulating device comprises at least an impedance matching circuit and corresponding connector, where each impedance matching circuit corresponds to a connector and is used for impedance matching, and the connector is connected with the impedance matching circuit and connected to a device and inputs a signal into the impedance matching circuit for impedance matching; the impedance matching circuit and the connector are arranged on an independent single plate. And the impedance value of each impedance matching circuit is 120 plus or minus 12 Ohm, or 75 plus or minus 3 Ohm, or 100 plus or minus 5 Ohm. And it implements flexible field selection of E1 or F1 interface mode, simple and convenient to operate.
Description
Technical field
The present invention relates to a kind of impedance regulating and the communication system that comprises this device, relate in particular to a kind of be used for regulating the E1 interface of communication system or the impedance regulating of T1 Interface Matching impedance.
Background technology
In communication technique field, on existing router or Ethernet switch, usually have and carry out each router or switch interconnected and be used to transmit the interface of usefulness, in order to satisfy different design objectives and user's request, the flexible configuration function of expansion equipment/business often need be carried out interconnected butt joint with the various device at scene.In the Interface design of these equipment, often adopt E1 and T1 transmission technology.E1 and T1 are two kinds of signal transmission standards of being worked out respectively by International Telecommunication Union and American National Standards Institute (ANSI), have obtained the support of most of equipment manufacturers.Wherein the E1 interface need be supported 120 ohm impedance cable and 75 ohm impedance cable usually, and the T1 interface need be supported 100 ohm impedance cable.
Existing E1 and T1 interface features impedance standard are as follows: for the E1 interface, the characteristic impedance in balancing circuitry is 120 ± 12 Ω, and the characteristic impedance in unbalanced circuit is 75 ± 3 Ω; Only have the situation of balancing circuitry for T1, characteristic impedance is 100 ± 5 Ω; E1 and T1 transfer of unidirectional signal are divided into transmission and receive both direction, and each direction uses 2 signal line to come transmission signals, by impedance adjustment circuit and balance/non-equilibrium selection circuit switching interface pattern.Interface design commonly used in the existing equipment (has been omitted protective circuit) as shown in Figure 1:
Both sides' equipment is interconnected by E1 or T1 interface among Fig. 1, and A is recipient's a impedance adjustment circuit, and the impedance of recipient's interface is set by the resistance that disposes different resistances; B is balance/non-equilibrium regulating circuit of recipient, whether connects balance/unbalanced mode that protection ground is provided with the transmit leg interface by the configuration interface holding wire, only connects a signal line here to protection ground PGND; C is the balance/non-equilibrium regulating circuit of transmit leg, by the configuration interface holding wire whether ground connection the balance/unbalanced mode of transmit leg interface is set, only connect a signal line here to protection ground PGND.The impedance of both sides' equipment and ground connection pattern configurations must consistently could realize that E1 or T1's is normally interconnected.At transmit leg and recipient interface transformer is arranged all, be used for being connected with external transmission lines.
Because E1 and T1 have multiple impedance mode to select, and cause the equipment interface of each tame manufacturer not necessarily can directly dock, all to revise the configuration realization devices interconnect butt joint of E1/T1 as a rule according to the interface case at scene.But not all equipment is all supported the on-the-spot interface parameters of revising, so the situation that frequent appearance can not be docked smoothly.
It is three kinds of standards at E1 and T1 interface that a kind of scheme is wherein arranged, change the design parameter of A, B, C circuit, select the resistance and the ground connection form of different resistances respectively for use, every kind of corresponding a kind of interface card of interface modes designs three kinds of different interface cards altogether.But this scheme but has following shortcoming:
1) it is of a great variety that the design of fixed configurations can cause circuit board, increased design cost;
2) circuit board is of a great variety, causes the difficulty in field management and the configuration big, can not regulate at any time according to field condition, and is extremely dumb in the use;
3) each tame supplier's configuration mode disunity fixedly installs and can not realize different vendor equipment interface butt joints.
Also having a kind of scheme is to come the option interface pattern by the design toggle switch, uses different toggle switch (perhaps being called toggle switch) to regulate the ground connection selection of the resistance value and the balance/unbalanced circuit of impedance adjustment circuit respectively.But this scheme but has following shortcoming:
1) because E1/T1 generally is the application of 4 tunnel/8 tunnel/16 tunnel/32 tunnel multichannels, in order to realize the flexible configuration of interface modes, at least need to design 4 switches on A, the B of every road E1/T1 transmitting-receiving circuit, the C circuit, cause the toggle switch that needs design a large amount of, not only can take a large amount of areas on the circuit board, also can cause bad influence circuit layout;
2) also very complicated in the use, need stir a large amount of switches when regulating interface modes, execute-in-place is poor, and mistake takes place easily;
3) other devices relatively, toggle switch are the mechanical reed contact on internal structure, are easy to aging and cause loose contact, and reliability is lower, repeatedly stir or use for a long time after be easy to occur component failure.
Summary of the invention
The communication system that purpose of the present invention just provides a kind of impedance regulating and comprises this impedance regulating under the situation that does not roll up expense, has realized the flexible function of impedance.Be achieved through the following technical solutions purpose of the present invention:
The invention provides a kind of impedance regulating, comprise at least one impedance matching circuit and corresponding connector, the corresponding connector of each impedance matching circuit, wherein said impedance matching circuit is used for impedance matching, described connector is connected with described impedance matching circuit, described connector is used to be connected to the device that needs with corresponding connectors carry out impedance matching, and the signal that needs carry out impedance matching is input to described impedance matching circuit; Described impedance matching circuit and described connector are arranged on one independently on the veneer.
The present invention also provides a kind of communication system, comprise impedance regulating and the device that need carry out impedance matching, described impedance regulating comprises at least one impedance matching circuit and corresponding connector, the corresponding connector of each impedance matching circuit, wherein said impedance matching circuit is used for impedance matching, described connector is connected with described impedance matching circuit, described connector is used to be connected to the device that described needs carry out impedance matching, and the signal that needs carry out impedance matching is input to described impedance matching circuit; It is characterized in that described impedance matching circuit and described connector are arranged on one independently on the veneer; The device that described needs carry out impedance matching have with described impedance regulating on the corresponding connector of connector.
The resistance value of described each impedance matching circuit is 120 ± 12 Ω, 75 ± 3 Ω or 100 ± 5 Ω.
When the resistance value of described impedance matching circuit is 75 ± 3 Ω, also comprised the shorting stub of interconnect function on the described impedance matching circuit, this shorting stub is connected on the described connector.
Described impedance regulating is used to regulate the matched impedance of E1 or T1 interface.
Utilize such scheme of the present invention, realized the on-the-spot selection flexibly of E1/T1 Interface pattern; Regulate when selecting easy and simple to handle; Do not take board area in a large number; Do not increase extra cost and design difficulty.
By below in conjunction with the accompanying drawing description of the preferred embodiment of the present invention, other characteristics of the present invention, purpose and effect will become clear more and easy to understand.
Description of drawings
Preferred implementation of the present invention is described below with reference to the accompanying drawings, wherein:
Fig. 1 is a system construction drawing of the prior art;
Fig. 2 is a system construction drawing of the present invention;
Fig. 3 regulates the structure chart of the embodiment of buckle for adopting 75 ohmages among the present invention;
Fig. 4 is the structure chart of the impedance adjustment buckle of various impedances;
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
With reference to figure 2, both sides' communication equipment is interconnected by E1 or T1 interface among the figure, impedance adjustment circuit no longer is set on the base plate of both sides' equipment, but a connector one end 1 (plug or socket) is set on base plate, the position that needs is connected matched impedance or ground connection is connected on the predetermined contact pin (also can be inserted sheet) or jack on the connector by the lead on the printed substrate; The other end 2 of connector (socket or plug) is installed on the impedance adjustment buckle, on the impedance adjustment buckle, be provided with different circuit according to different impedance operators, if 75 ohm of unbalanceds impedance mode single-end earthed, then buckle is provided with 75 Ohmic resistances 4 and shorting stub 3, is connected respectively on the jack or contact pin of the relevant position on the connector on this plate; Referring to Fig. 3, when the connector on the buckle with after connector on the base plate is connected, 75 ohm of positions that can effectively be connected to A; Shorting stub on the buckle also can connect needs the transmit leg on protection ground and recipient's circuit is connected to protection ground.Balanced type impedance mode for 120 ohm and 100 ohm only needs 120 ohm or 100 Ohmic resistances, does not need shorting stub, and their concrete structure as shown in Figure 4.Resistance and shorting stub all belong to the impedance matching circuit part; In the present embodiment different impedance matching circuits is placed in the different impedance adjustment buckles, respectively the impedance matching circuit of each interface modes of corresponding E1 or T1 interface.Certainly, be not limited to a kind of impedance matching circuit on the buckle, can with two or three or more kinds of impedance matching circuit concentrate on the buckle the corresponding connector of each impedance matching circuit; Can plug corresponding connector according to needs impedance for matching value on the base plate gets final product; Printed circuit by circuit board on the connector of base plate is introduced the signal that needed A, B, C circuit adjustment originally, be used for the signal that needs are linked into A, B, C circuit is drawn out to connector on the buckle, just can realize the characteristic impedance on the transmission line is carried out the effect of impedance matching like this by the impedance matching circuit on the buckle; During use, buckle and base plate are connected to each other by two connectors, need only the needs according to the work on the spot pattern, and the gusset plate connector that will have the corresponding interface pattern is connected on the back plane connector and gets final product.
Connector among the present invention can be the contact pin connector of many contact pins, is that AMP5084616-6 and model are the contact pin connector of AMP5177986-6 as model; The impedance matching circuit that adopts among the present invention all is an impedance matching circuit of the prior art, be with the different of prior art, different impedance matching circuit independent design is become independent buckle, do not need to regulate impedance, the impedance matching pattern of each buckle is well-determined, so just do not need to design a large amount of toggle switches, can not take a large amount of areas on the backplane circuit plate, can not cause bad influence circuit layout; Also very simple in the use, be not easy to take place mistake; The reliability that circuit connects is also stronger.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. an impedance regulating comprises at least one impedance matching circuit; It is characterized in that,
Also comprise and the corresponding connector of described impedance matching circuit, the corresponding connector of each impedance matching circuit, wherein said impedance matching circuit is used for impedance matching, described connector is connected with described impedance matching circuit, described connector is used to be connected to the device that needs with corresponding connectors carry out impedance matching, and the signal that needs carry out impedance matching is input to described impedance matching circuit; Described impedance matching circuit and described connector are arranged on one independently on the veneer.
2. impedance regulating according to claim 1 is characterized in that, the resistance value of described each impedance matching circuit is 120 ± 12 Ω, 75 ± 3 Ω or 100 ± 5 Ω.
3. impedance regulating according to claim 2 is characterized in that, when the resistance value of described impedance matching circuit was 75 ± 3 Ω, described impedance matching circuit had also comprised the shorting stub of interconnect function, and this shorting stub is connected on the described connector.
4. according to each described impedance regulating in the claim 1 to 3, it is characterized in that described impedance regulating is used to regulate the matched impedance of E1 or T1 interface.
5. a communication system comprises impedance regulating and the device that need carry out impedance matching, and described impedance regulating comprises at least one impedance matching circuit; It is characterized in that,
Described impedance regulating also comprises and the corresponding connector of described impedance matching circuit, the corresponding connector of each impedance matching circuit, wherein said impedance matching circuit is used for impedance matching, described connector is connected with described impedance matching circuit, described connector is used to be connected to the device that described needs carry out impedance matching, and the signal that needs carry out impedance matching is input to described impedance matching circuit; Described impedance matching circuit and described connector are arranged on one independently on the veneer;
The device that described needs carry out impedance matching have with described impedance regulating on the corresponding connector of connector.
6. communication system according to claim 5 is characterized in that, the resistance value of described each impedance matching circuit is 120 ± 12 Ω, 75 ± 3 Ω or 100 ± 5 Ω.
7. communication system according to claim 6 is characterized in that, when the resistance value of described impedance matching circuit is 75 ± 3 Ω, has also comprised the shorting stub of interconnect function on the described impedance matching circuit, and this shorting stub is connected on the described connector.
8. according to each described communication system in the claim 5 to 7, it is characterized in that described impedance regulating is used to regulate the matched impedance of E1 or T1 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100727399A CN100411400C (en) | 2006-04-06 | 2006-04-06 | Impedance regulating device and communication system containing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100727399A CN100411400C (en) | 2006-04-06 | 2006-04-06 | Impedance regulating device and communication system containing same |
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| Publication Number | Publication Date |
|---|---|
| CN1863178A true CN1863178A (en) | 2006-11-15 |
| CN100411400C CN100411400C (en) | 2008-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100727399A Active CN100411400C (en) | 2006-04-06 | 2006-04-06 | Impedance regulating device and communication system containing same |
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| CN (1) | CN100411400C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800651A (en) * | 2009-12-29 | 2010-08-11 | 福建星网锐捷网络有限公司 | Circuit and switchboard for 1000Base-T gigabit Ethernet port interconnected communication |
| WO2012162999A1 (en) * | 2011-10-11 | 2012-12-06 | 华为技术有限公司 | E1 signal transmission line, e1 signal sending device and receiving device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE503722C2 (en) * | 1995-05-16 | 1996-08-12 | Allgon Ab | Antenna means with two radiating elements and with an adjustable phase difference between the radiating elements |
| US6439931B1 (en) * | 1998-05-13 | 2002-08-27 | Molex Incorporated | Method and structure for tuning the impedance of electrical terminals |
| US6294966B1 (en) * | 1999-12-31 | 2001-09-25 | Hei, Inc. | Interconnection device |
-
2006
- 2006-04-06 CN CNB2006100727399A patent/CN100411400C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800651A (en) * | 2009-12-29 | 2010-08-11 | 福建星网锐捷网络有限公司 | Circuit and switchboard for 1000Base-T gigabit Ethernet port interconnected communication |
| CN101800651B (en) * | 2009-12-29 | 2012-11-21 | 福建星网锐捷网络有限公司 | Circuit and switchboard for 1000Base-T gigabit Ethernet port interconnected communication |
| WO2012162999A1 (en) * | 2011-10-11 | 2012-12-06 | 华为技术有限公司 | E1 signal transmission line, e1 signal sending device and receiving device |
| CN103168427A (en) * | 2011-10-11 | 2013-06-19 | 华为技术有限公司 | E1 signal transmission line, e1 signal sending device and receiving device |
| CN103168427B (en) * | 2011-10-11 | 2014-12-03 | 华为技术有限公司 | E1 signal sending device and receiving device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100411400C (en) | 2008-08-13 |
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