CN101799973A - Signal transmission circuit and method - Google Patents
Signal transmission circuit and method Download PDFInfo
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- CN101799973A CN101799973A CN201010105141A CN201010105141A CN101799973A CN 101799973 A CN101799973 A CN 101799973A CN 201010105141 A CN201010105141 A CN 201010105141A CN 201010105141 A CN201010105141 A CN 201010105141A CN 101799973 A CN101799973 A CN 101799973A
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- transformer
- interface board
- disposable plates
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Abstract
The invention provides a signal transmission circuit and a method, wherein the method is realized through an interface board, a back board and a processing board, wherein the interface board and the processing board are inserted on the back board, the interface board comprises an interface board receiving transformer, one end of the sending end of the interface board receiving transformer is grounded, the interface board receiving transformer is used for converting differential signals of the outside into single-end signals to be transmitted to the back board, the processing board comprises a processing board receiving transformer, one end of the receiving end of the processing board receiving transformer is grounded, and the processing board receiving transformer is used for receiving the single-end signals through the back board, and converting the single-end signals into differential signals to be sent to a circuit processing unit LIU. The signal transmission circuit of the invention can be used for providing the signal transmission capacity of the back board without changing the wiring condition of the back board, i.e. the signal transmission path number is increased. Thereby, the interference between signals caused by back board wiring increase can be avoided.
Description
Technical field
The present invention relates to network communications technology field, particularly a kind of signal circuit and method.
Background technology
Adopt 1 tunnel differential lines to transmit 1 road E1 signal in the existing E1 business.Because the backboard cabling is supported 63 tunnel differential lines at most, so a disposable plates can be transmitted 63 road E1 signals at most.
Referring to Fig. 1, this figure is the synoptic diagram of E1 signal transmission of the prior art.
Wherein, disposable plates 103 is inserted on the backboard 102.The major function that disposable plates 103 is finished is the processing to business datum.Disposable plates 103 does not have interface can carry out the reception and the transmission of data with the external world, therefore needs to use an interface board 101 to carry out the reception and the transmission of data with the external world.
Can insert a lot of veneers on the backboard 102, each veneer is finished communication by the cabling on the backboard 102.
Because 1 road E1 signal demand, 1 tunnel differential lines is transmitted, i.e. two data lines.Like this, when the capacity of E1 business increased, the cabling of backboard will increase, and so not only cause cost to increase, and the backboard cabling more for a long time, causes interference between signals easily.
Summary of the invention
The embodiment of the invention provides a kind of signal circuit and method, can not increase the cabling of backboard when increasing professional capacity, thereby reduces cost.
The embodiment of the invention provides a kind of signal circuit, comprising: interface board, backboard and disposable plates; Described interface board and disposable plates are inserted on the described backboard; Described interface board comprises the interface board receiving transformer, an end ground connection of the transmitting terminal of described interface board receiving transformer; Described interface board receiving transformer is used for differential signal with the external world and is converted to single-ended signal and is defeated by backboard; Described disposable plates comprises the disposable plates receiving transformer, an end ground connection of the receiving end of described disposable plates receiving transformer; Described disposable plates receiving transformer is used for receiving described single-ended signal by backboard, single-ended signal is converted to differential signal sends to Line Processing Unit LIU.
The embodiment of the invention also provides a kind of signal circuit, comprising: interface board, backboard and disposable plates; Described interface board and disposable plates are inserted on the described backboard by connector; Described disposable plates comprises that disposable plates sends transformer, and described disposable plates sends an end ground connection of the transmitting terminal of transformer; Described disposable plates sends differential signal that transformer is used for the LIU that will receive and is converted to single-ended signal and is defeated by backboard; Described interface board comprises that interface board sends transformer, and described interface board sends an end ground connection of the receiving end of transformer; Described interface board sends transformer and is used for receiving described single-ended signal by described backboard, single-ended signal is converted to differential signal sends to the external world.
The embodiment of the invention also provides a kind of method for transmitting signals, is applied to signal circuit, and described signal transmission line comprises interface board, backboard and disposable plates; Described interface board comprises the interface board receiving transformer, and described disposable plates comprises the disposable plates receiving transformer, may further comprise the steps: described interface board receiving transformer is converted to single-ended signal with the differential signal in the external world and is defeated by backboard; One end ground connection of the transmitting terminal of described interface board receiving transformer; Described disposable plates receiving transformer receives described single-ended signal by backboard, described single-ended signal is converted to differential signal sends to Line Processing Unit LIU; One end ground connection of the receiving end of described disposable plates receiving transformer.
Above technical scheme, by an end ground connection with the transmitting terminal of transformer, the differential signal that transformer receives can be converted to single-ended signal and transmit, what transmit between interface board and the backboard like this is single-ended signal, and what transmit between backboard and the disposable plates also is single-ended signal.The prior art dorsulum all is to adopt differential signal to transmit with the signal of interface board and disposable plates respectively, use after the signal circuit of the present invention, can under the situation that does not change the backboard cabling, provide the capacity of backboard transmission signals, promptly increase the way of transmission signals.Can avoid increasing interference between signals caused by back board wiring like this.
Description of drawings
Fig. 1 is the synoptic diagram of E1 signal transmission of the prior art;
Fig. 2 is signal circuit embodiment one synoptic diagram of the present invention;
Fig. 3 is the structural drawing of interface board receiving transformer provided by the invention;
Fig. 4 is the structural drawing of disposable plates receiving transformer provided by the invention;
Fig. 5 is signal circuit embodiment two structural drawing provided by the invention;
Fig. 6 is the structural drawing that disposable plates provided by the invention sends transformer;
Fig. 7 is the structural drawing that interface board provided by the invention sends transformer;
Fig. 8 is signal circuit embodiment three structural drawing provided by the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
Embodiment one:
Referring to Fig. 2, this figure is signal circuit embodiment one synoptic diagram provided by the invention.
Signal circuit provided by the invention comprises: interface board 201, backboard 202 and disposable plates 203.
Described interface board 201 and disposable plates 203 are inserted on the described backboard 202 by connector.
Described interface board 201 comprises interface board receiving transformer 201a, an end ground connection of the transmitting terminal of described interface board receiving transformer 201a.Described interface board receiving transformer 201a is used for differential signal with the external world and is converted to single-ended signal and is defeated by backboard 202.
What interface board receiving transformer 201a received extraneous differential signal employing is differential lines.
Described disposable plates 203 comprises disposable plates receiving transformer 203a, an end ground connection of the receiving end of described disposable plates receiving transformer 203a.Described disposable plates receiving transformer 203a is used for receiving described single-ended signal by backboard 202, single-ended signal is converted to differential signal sends to Line Processing Unit (LIU, LineInterface Unit) 203b.
What disposable plates receiving transformer 203a sent to that the differential signal of LIU203b adopts is differential lines.
This shows that backboard 202 all is to transmit with the form of single-ended signal with the signal transmission of interface board 201 and the signal transmission of backboard 202 and disposable plates 203.Like this, when the signal way of interface board and disposable plates transmission increases, the way that the signal of backboard 202 transmission increases only be interface board transmission way increase half get final product.Need 63 pairs of differential lines to transmit when for example, prior art dorsulum 202 transmits 63 road E1 differential signals.After the circuit that the application embodiment of the invention provides, when transmitting 126 road E1 differential signals, backboard 202 just needs 63 pairs of circuits to transmit.Therefore, when the signal way of the E1 business that need handle when interface board and disposable plates doubles, the cabling on the backboard can be changed, signal interference problem and the high problem of cost that the cabling on the backboard brings can be avoided increasing like this.
Referring to Fig. 3, this figure is the structural drawing of interface board receiving transformer provided by the invention.
A1B 1 is the receiving end of interface board receiving transformer T1, and M1N1 is the transmitting terminal of interface board receiving transformer T1.
Wherein A1B1 receives the differential signal that comes from the outside.
The winding of transmitting terminal has center tap, and center tap is by first capacitor C, 1 ground connection.
The effect of first capacitor C 1 is to be used for signal is carried out filtering.
N1 holds ground connection.
After the differential signal that interface board receiving transformer T1 receives the A1B1 termination is converted to single-ended signal, issue backboard by the M1 end.
Need to prove, in the embodiment of the invention, the amplitude of extraneous differential signal may be ± 3V, in this case, if the scope of backboard signal to be processed will be in 3V, the amplitude of the extraneous differential signal that can will receive by interface board receiving transformer T1 diminishes, and converts the less signal of the manageable amplitude of backboard to.For example the no-load voltage ratio of the receiving end winding of interface board receiving transformer T1 and transmitting terminal winding is set to more than or equal to 2.
Referring to Fig. 4, this figure is the structural drawing of disposable plates receiving transformer provided by the invention.
A2B2 is the receiving end of disposable plates receiving transformer T2, and M2N2 is the transmitting terminal of disposable plates receiving transformer T2.
N2 is by the lower end of the transmitting terminal winding of first resistance R, 1 connection processing plate receiving transformer T2.
The transmitting terminal winding of disposable plates receiving transformer T2 has center tap, and center tap is by second capacitor C, 2 ground connection.
The effect of second capacitor C 2 is to be used for signal is carried out filtering.
B2 ground connection wherein, A2 receives the single-ended signal from backboard, and disposable plates receiving transformer T2 will be converted to differential signal from the single-ended signal of backboard, send to LIU by transmitting terminal M2N2 and handle.
Need to prove that because the scope of the signal that backboard is handled is identical with the scope of the signal of disposable plates processing, therefore, the receiving end winding of disposable plates receiving transformer T2 and the no-load voltage ratio of transmitting terminal winding can be preferably 1.
Embodiment two:
Referring to Fig. 5, this figure is signal circuit embodiment two structural drawing provided by the invention.
The difference of present embodiment and embodiment one is that interface board 201 comprises that also interface board sends transformer, and disposable plates 203 comprises that also disposable plates sends transformer.
Wherein, described disposable plates sends an end ground connection of the transmitting terminal of transformer; Disposable plates sends differential signal that transformer is used for the LIU that will receive and is converted to single-ended signal and is defeated by backboard 202.
Described interface board 201 comprises that also interface board sends transformer, and described interface board sends an end ground connection of the receiving end of transformer; Interface board sends transformer and is used to receive the single-ended signal that backboard 202 sends, and single-ended signal is converted to differential signal sends to the external world.
This shows that backboard 202 all is to transmit with the form of single-ended signal with the signal transmission of interface board 201 and the signal transmission of backboard 202 and disposable plates 203.Like this, when the signal way of interface board and disposable plates transmission increases, the way that the signal of backboard 202 transmission increases only be interface board transmission way increase half get final product.Need 63 pairs of differential lines to transmit when for example, prior art dorsulum 202 transmits 63 road E1 differential signals.After the circuit that the application embodiment of the invention provides, when transmitting 126 road E1 differential signals, backboard 202 just needs 63 pairs of circuits to transmit.Therefore, when the signal way of the E1 business that need handle when interface board and disposable plates doubles, the cabling on the backboard can be changed, signal interference problem and the high problem of cost that the cabling on the backboard brings can be avoided increasing like this.
Referring to Fig. 6, this figure is the structural drawing that disposable plates provided by the invention sends transformer.
A3B3 is the receiving end that disposable plates sends transformer T3, receives the differential signal from LIU.
Disposable plates sends receiving end winding two ends the 3rd capacitor C 3 in parallel of transformer T3.
The effect of the 3rd capacitor C 3 is in order to suppress the common mode voltage of receiving end signal.
M3N3 is the transmitting terminal that disposable plates sends transformer T3.
The transmitting terminal winding that disposable plates sends transformer T3 has center tap, and center tap is by second resistance R, 2 ground connection.
Disposable plates sends the lower end of the transmitting terminal winding of transformer T3 and passes through the 3rd resistance R 3 ground connection.
The differential signal from LIU that disposable plates transmission transformer T3 will receive is converted to single-ended signal and sends to backboard by transmitting terminal.
Need to prove that because the scope of the signal that backboard is handled is identical with the scope of the signal of disposable plates processing, therefore, disposable plates sends the receiving end winding of transformer T2 and the no-load voltage ratio of transmitting terminal winding can be preferably 1.
Referring to Fig. 7, this figure is the structural drawing that interface board provided by the invention sends transformer.
A4B4 is the receiving end that interface board sends transformer T4, and M4N4 is the transmitting terminal that interface board sends transformer T4.
Wherein, interface board sends the lower end ground connection of the receiving end winding of transformer T4, the two ends of receiving end winding the 4th capacitor C 4 in parallel.
The effect of the 4th capacitor C 4 is in order to suppress the common mode voltage of receiving end signal.
The transmitting terminal winding that interface board sends transformer T4 has center tap, center tap ground connection.
The receiving end that interface board sends transformer T4 receives the single-ended signal from backboard, is sent to the external world by transmitting terminal after being converted into differential signal.
Need to prove, in the embodiment of the invention, the amplitude of extraneous differential signal may be ± 3V, in this case, if the scope of backboard signal to be processed will be in 3V, it is big with the amplitude change of the single-ended signal of the backboard of reception to send transformer T4 by interface board, converts the bigger signal of extraneous manageable amplitude to.For example interface board sends the receiving end winding of transformer T4 and the no-load voltage ratio of transmitting terminal winding is set to be less than or equal to 1/2.
Embodiment three:
The embodiment of the invention also provides a kind of signal circuit.Referring to Fig. 8, this figure is signal circuit embodiment three structural drawing provided by the invention.
This signal circuit comprises: interface board 801, backboard 802 and disposable plates 803.
Described interface board 801 and disposable plates 803 are inserted on the described backboard 802 by connector.
Described disposable plates 803 comprises that disposable plates sends transformer 803a, and described disposable plates sends an end ground connection of the transmitting terminal of transformer 803a; Described disposable plates transmission transformer 803a is used to receive the differential signal from LIU, will be converted to single-ended signal from the differential signal of LIU and be defeated by backboard 802.
Disposable plates sends the differential lines that transformer receives the differential signal employing of LIU.
Described interface board 801 comprises that interface board sends transformer 801a, and described interface board sends an end ground connection of the receiving end of transformer 801a; Described interface board sends transformer 801a and is used to receive the single-ended signal that backboard sends, and single-ended signal is converted to differential signal sends to the external world.
What interface board transmission transformer 801a sent to extraneous differential signal employing is differential lines.
This shows that backboard 802 all is to transmit with the form of single-ended signal with the signal transmission of interface board 801 and the signal transmission of backboard 802 and disposable plates 803.Like this, when the signal way of interface board and disposable plates transmission increases, the way that the signal of backboard 802 transmission increases only be interface board transmission way increase half get final product.Need 63 pairs of differential lines to transmit when for example, prior art dorsulum 802 transmits 63 road E1 differential signals.After the circuit that the application embodiment of the invention provides, when transmitting 126 road E1 differential signals, backboard 802 just needs 63 pairs of circuits to transmit.Therefore, when the signal way of the E1 business that need handle when interface board and disposable plates doubles, the cabling on the backboard can be changed, signal interference problem and the high problem of cost that the cabling on the backboard brings can be avoided increasing like this.
Based on the signal circuit that above embodiment provides, the embodiment of the invention also provides a kind of method for transmitting signals that is applied to above signal circuit.
Method embodiment one:
The method for transmitting signals that present embodiment provides is applied to signal circuit, and described signal transmission line comprises interface board, backboard and disposable plates; Described interface board comprises the interface board receiving transformer, and described disposable plates comprises the disposable plates receiving transformer, may further comprise the steps:
S901: described interface board receiving transformer is converted to single-ended signal with the differential signal in the external world and is defeated by backboard; One end ground connection of the transmitting terminal of described interface board receiving transformer.
S902: described disposable plates receiving transformer receives described single-ended signal by backboard, described single-ended signal is converted to differential signal sends to Line Processing Unit LIU; One end ground connection of the receiving end of described disposable plates receiving transformer.
The method for transmitting signals that present embodiment provides, differential signal is converted to single-ended signal to be transmitted, can save the signal way on the backboard like this, when the signal way of the E1 business that need handle when interface board and disposable plates doubles, the cabling on the backboard can be changed, signal interference problem and the high problem of cost that the cabling on the backboard brings can be avoided increasing like this.
Method embodiment two:
Interface board described in the signal circuit that the method for transmitting signals that present embodiment provides is used comprises that also interface board sends transformer, and described disposable plates comprises that also disposable plates sends transformer.Further comprising the steps of:
S1001: described disposable plates sends transformer and the differential signal of the LIU that receives is converted to single-ended signal is defeated by backboard; Described disposable plates sends an end ground connection of the transmitting terminal of transformer;
S1002: described interface board sends transformer and receives described single-ended signal by described backboard, single-ended signal is converted to differential signal sends to the external world; Described interface board sends an end ground connection of the receiving end of transformer.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all still belongs in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (12)
1. a signal circuit is characterized in that, comprising: interface board, backboard and disposable plates;
Described interface board and disposable plates are inserted on the described backboard;
Described interface board comprises the interface board receiving transformer, an end ground connection of the transmitting terminal of described interface board receiving transformer; Described interface board receiving transformer is used for differential signal with the external world and is converted to single-ended signal and is defeated by backboard;
Described disposable plates comprises the disposable plates receiving transformer, an end ground connection of the receiving end of described disposable plates receiving transformer; Described disposable plates receiving transformer is used for receiving described single-ended signal by backboard, single-ended signal is converted to differential signal sends to Line Processing Unit LIU.
2. signal circuit according to claim 1 is characterized in that, described disposable plates comprises that also disposable plates sends transformer, and described disposable plates sends an end ground connection of the transmitting terminal of transformer; Described disposable plates transmission transformer is used to receive the differential signal from LIU, described differential signal from LIU is converted to single-ended signal is defeated by backboard;
Described interface board comprises that also interface board sends transformer, and described interface board sends an end ground connection of the receiving end of transformer; Described interface board sends transformer and is used to receive the single-ended signal that backboard sends, and single-ended signal is converted to differential signal sends to the external world.
3. signal circuit according to claim 1 is characterized in that, the receiving end winding of described interface board receiving transformer and the no-load voltage ratio of transmitting terminal winding are more than or equal to 2.
4. signal circuit according to claim 1 is characterized in that, the receiving end winding of described disposable plates receiving transformer and the no-load voltage ratio of transmitting terminal winding are 1.
5. signal circuit according to claim 2 is characterized in that, the receiving end of described interface board transmission transformer and the no-load voltage ratio of transmitting terminal are for being less than or equal to 1/2.
6. signal transmission line according to claim 2 is characterized in that, described disposable plates sends the receiving end of transformer and the no-load voltage ratio of transmitting terminal is 1.
7. signal transmission line according to claim 1 is characterized in that, the transmitting terminal winding of described interface board receiving transformer and disposable plates receiving transformer all has center tap, and described center tap passes through capacity earth.
8. signal transmission line according to claim 2 is characterized in that, the transmitting terminal winding that described interface board sends transformer and disposable plates transmission transformer all has center tap, described center tap ground connection.
9. signal transmission line according to claim 2 is characterized in that, the two ends that described interface board sends the receiving end winding of transformer and disposable plates transmission transformer are parallel with electric capacity.
10. a signal circuit is characterized in that, comprising: interface board, backboard and disposable plates;
Described interface board and disposable plates are inserted on the described backboard by connector;
Described disposable plates comprises that disposable plates sends transformer, and described disposable plates sends an end ground connection of the transmitting terminal of transformer; Described disposable plates sends differential signal that transformer is used for the LIU that will receive and is converted to single-ended signal and is defeated by backboard;
Described interface board comprises that interface board sends transformer, and described interface board sends an end ground connection of the receiving end of transformer; Described interface board sends transformer and is used for receiving described single-ended signal by described backboard, single-ended signal is converted to differential signal sends to the external world.
11. a method for transmitting signals is characterized in that, is applied to signal circuit, described signal transmission line comprises interface board, backboard and disposable plates; Described interface board comprises the interface board receiving transformer, and described disposable plates comprises the disposable plates receiving transformer, may further comprise the steps: described interface board receiving transformer is converted to single-ended signal with the differential signal in the external world and is defeated by backboard; One end ground connection of the transmitting terminal of described interface board receiving transformer;
Described disposable plates receiving transformer receives described single-ended signal by backboard, described single-ended signal is converted to differential signal sends to Line Processing Unit LIU; One end ground connection of the receiving end of described disposable plates receiving transformer.
12. method for transmitting signals according to claim 11 is characterized in that, described interface board comprises that also interface board sends transformer, and described disposable plates comprises that also disposable plates sends transformer;
Described disposable plates sends transformer and the differential signal of the LIU that receives is converted to single-ended signal is defeated by backboard; Described disposable plates sends an end ground connection of the transmitting terminal of transformer;
Described interface board sends transformer and receives described single-ended signal by described backboard, single-ended signal is converted to differential signal sends to the external world; Described interface board sends an end ground connection of the receiving end of transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010105141A CN101799973A (en) | 2010-01-26 | 2010-01-26 | Signal transmission circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010105141A CN101799973A (en) | 2010-01-26 | 2010-01-26 | Signal transmission circuit and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101799973A true CN101799973A (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010105141A Pending CN101799973A (en) | 2010-01-26 | 2010-01-26 | Signal transmission circuit and method |
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| Country | Link |
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| CN (1) | CN101799973A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005932A (en) * | 2010-11-04 | 2011-04-06 | 中兴通讯股份有限公司 | Processing board, interface board, signal processing device and signal processing method |
| CN104854573A (en) * | 2012-09-06 | 2015-08-19 | 百科容公司 | Reducing crosstalk in board-to-board electronic communication |
| CN111901012A (en) * | 2020-07-23 | 2020-11-06 | 深圳市奥拓电子股份有限公司 | Ethernet communication module and electronic system for simultaneously transmitting two signals |
-
2010
- 2010-01-26 CN CN201010105141A patent/CN101799973A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005932A (en) * | 2010-11-04 | 2011-04-06 | 中兴通讯股份有限公司 | Processing board, interface board, signal processing device and signal processing method |
| CN104854573A (en) * | 2012-09-06 | 2015-08-19 | 百科容公司 | Reducing crosstalk in board-to-board electronic communication |
| CN111901012A (en) * | 2020-07-23 | 2020-11-06 | 深圳市奥拓电子股份有限公司 | Ethernet communication module and electronic system for simultaneously transmitting two signals |
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Application publication date: 20100811 |