CN103531977A - Data transmission line - Google Patents
Data transmission line Download PDFInfo
- Publication number
- CN103531977A CN103531977A CN201210233218.2A CN201210233218A CN103531977A CN 103531977 A CN103531977 A CN 103531977A CN 201210233218 A CN201210233218 A CN 201210233218A CN 103531977 A CN103531977 A CN 103531977A
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- China
- Prior art keywords
- terminal
- conducting terminal
- joint connector
- data line
- filter circuit
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Abstract
The invention discloses a data transmission line which includes a source-end joint connector, a reception-end joint connector and a cable located between the source-end joint connector and the reception-end joint connector. The data transmission line is also provided with an RC filtering circuit which is connected to the reception-end joint connector. Under a situation that other conditions are the same, because the data transmission line, which is provided with the RC filtering circuit, is capable of identifying really useful signals comparatively easily, when a transmission distance of the data transmission line is extended properly, the reception end can still obtain clear signals.
Description
[technical field]
The present invention, about a kind of data line, relates in particular to a kind of data line of extending transmission distance.
[background technology]
Along with scientific and technical development, various electronic equipments emerge in an endless stream, and the Application of Interface that is applied to carry out between various electronic equipments transfer of data is also more and more extensive.In April, 1999, in order to meet the requirement of digital times high quality graphics image, DDWG(Digital Display Working Group, numeral shows working group) to take the patented technology of U.S. Silicon Image company be source, released a kind of DVI(Digital Visual Interface by name, digital visual interface) interface, is intended to unified New Times digital display interface standard.Computer and external equipment be connected and signal has used multiple interfaces and signal transmission form, these interfaces and signal transmission form can incorporate respectively two kinds of communications protocol into: serial communication protocol and parallel communication agreement.This technology and obtained in IT industry the extensive support with a plurality of large enterprises such as Intel, DELL, HP,IBM, Microsofts.Through the popularization more than 3 years, DVI technology has obtained rapid utilization in Computer display output field, but be accompanied by the development of the audio-visual technology of digital high-definition, DVI interface also starts to expose gradually variety of problems, becomes even to a certain extent the bottleneck of digitized video technological progress.
The subject matter that DVI interface exists has:
DVI interface consider to as if PC, general for the compatibility of panel TV.
DVI interface lacks and supports image copyright protection.
DVI interface is only supported the rgb signal transmission of 8bit, can not allow the display terminal of wide colour gamut bring into play optimum performance.
DVI interface is considered for compatibility, has reserved many pins to support analog machine, causes interface volume larger, and efficiency is very low.
DVI interface can only image signal transmission, for the support of digital audio and video signals, does not consider completely.
Due to above many disadvantages, DVI interface can not better meet the development need of whole industry.Therefore, no matter be IT vendor, panel TV manufacturer, or numerous publishers of Hollywood, all in the urgent need to a kind of better interfacing that can meet following HD video industry development, also just for these reasons, just impelled HDMI(High Definition Multimedia Interface, HDMI (High Definition Multimedia Interface)) birth of standard.In April, 2002, HDMI Founders(HDMI forum of HDMI high-definition media interface interface organization has been set up jointly in 7 companies such as Hitachi, Panasonic, Philip, Silicon Image, Sony, Thomson, Toshiba), take up to formulate a kind of brand new digital video/audio interfacing that meets high definition epoch standard.Through the preparation of many times of half a year, HDMI Founders has formally issued 1.0 editions standards of HDMI on December 9th, 2002, indicates that HDMI technology formally enters the arena of history.
Yet existing HDMI data line transmission range is generally shorter, if the length that extends merely data line is to increase transmission range, will certainly cause signal attenuation, therefore, be necessary to provide in fact a kind of HDMI data line of extending transmission distance.
[summary of the invention]
The object of the present invention is to provide a kind of data line, it can be extended transmission distance.
The present invention discloses a kind of data line, comprises the cable of source joint connector, receiving terminal joint connector and connection source joint connector and receiving terminal joint connector.Described data line is also provided with the RC filter circuit that is connected in receiving terminal joint connector.
As further improved technical scheme of the present invention, described RC filter circuit is connected between the signal transmission terminal and cable of receiving terminal joint connector.
As further improved technical scheme of the present invention, described RC filter circuit comprises resistance and electric capacity, and described electric capacity and resistance are the relation of being connected in parallel.
As further improved technical scheme of the present invention, described RC filter circuit is designed to high pass circuit.
As further improved technical scheme of the present invention, the signal transmission terminal of described receiving terminal joint connector comprises some differential pair terminal group, and described RC filter circuit connects differential pair terminal group.
As further improved technical scheme of the present invention, described differential pair terminal group is provided with four groups; The first differential pair terminal group for transmission pulse signal comprises the first conducting terminal and the 3rd conducting terminal, for the second differential pair terminal group of transmission pulse signal, comprise the 4th conducting terminal and the 6th conducting terminal, for the 3rd differential pair terminal group of transmission pulse signal, comprise the 7th conducting terminal and the 9th conducting terminal; Described the first conducting terminal, the 3rd conducting terminal, the 4th conducting terminal, the 6th conducting terminal, the 7th conducting terminal and the 9th conducting terminal are all connected with RC filter circuit.
As further improved technical scheme of the present invention, the 4th differential pair terminal group for transmit clock signal in described differential pair terminal group comprises the tenth conducting terminal and the 12 conducting terminal; The tenth conducting terminal and the 12 conducting terminal are all connected with RC filter circuit.
As further improved technical scheme of the present invention, between the signal transmission terminal of described source joint connector and cable, be also connected with another RC filter circuit.
Compared with prior art, the present invention has following beneficial effect: in the situation that other conditions are identical, owing to being provided with the data line of RC filter circuit, can be more easy to identify go out real useful signal, therefore, this data line proper extension transmission range, receiving terminal also can obtain signal clearly.
[accompanying drawing explanation]
Fig. 1 is the structural representation of data line of the present invention.
Fig. 2 is the inside connection diagram of data line of the present invention.
[embodiment]
Below, in connection with accompanying drawing, introduce in detail data line of the present invention.In the present embodiment, will illustrate with HDMI data line.
Please refer to the drawing 1 and Fig. 2, this HDMI data line comprises source HDMI joint connector, receiving terminal HDMI joint connector, is connected in the RC filter circuit of receiving terminal HDMI joint connector and the cable of connection source HDMI joint connector and RC filter circuit.Described source HDMI joint connector is identical with receiving terminal HDMI joint connector structure, all comprises insulating body, is immobilizated in conducting terminal and the shield shell of shade outside insulating body in insulating body.In the present embodiment, HDMI pin connector is HDMI A Type.This HDMI pin connector has nineteen conducting terminal, wherein, the first conducting terminal and the 3rd conducting terminal form the first differential pair terminal group, the 4th conducting terminal and the 6th conducting terminal form the second differential pair terminal group, the 7th conducting terminal and the 9th conducting terminal form the 3rd differential pair terminal group, and the tenth conducting terminal and the 12 conducting terminal form the 4th differential pair terminal group.The first differential pair terminal group, the second differential pair terminal group and the 3rd differential pair terminal group are for transmission pulse signal, and the 4th differential pair terminal group is for transmit clock signal.As shown in Figure 2, CN1 end corresponds to source and is provided with source HDMI joint connector; CN2 end corresponds to receiving terminal and is provided with receiving terminal HDMI joint connector; Terminal 1-19 corresponds to respectively the first to 19 conducting terminal of HDMI pin connector.The terminal 1-19 of described CN1 end HDMI joint connector distinguishes the corresponding connection of wire direct and cable, and realization electrically conducts.In described CN2 end HDMI joint connector, the first differential pair terminal group, the second differential pair terminal group, the 3rd differential pair terminal group and the 4th differential pair terminal group are connected with respectively RC filter circuit, the terminal 1,3,4,6,7,9,10,12 that is CN2 end HDMI joint connector is connected with RC filter circuit, and RC filter circuit is the wire of connection cable again; The wire of other terminal 2,5,8,11,13,14,15,16,17,18,19 tieline cables.At CN2 end, terminal 1,3,4,6,7,9,10,12(are signal transmission terminal) and cable between be connected with RC filter circuit, according to the present embodiment needs, RC filter circuit is designed to high pass circuit, and low frequency noise is filtered, and allows high-frequency signal pass through.Described RC filter circuit comprises resistance and electric capacity, and described electric capacity and resistance are the relation of being connected in parallel.In other embodiments, between the signal transmission terminal of CN2 end HDMI joint connector and cable, also can be connected with another RC filter circuit.
In actual test, when the receiving terminal of the HDMI of 5-10 rice data line is connected with RC filter circuit (the first conducting terminal, the 3rd conducting terminal, the 4th conducting terminal, the 6th conducting terminal, the 7th conducting terminal, the 9th conducting terminal, the tenth conducting terminal and the 12 conducting terminal are all connected with RC filter circuit), wherein, capacitance in RC filter circuit is got 27+/-10pF, and resistance value is got 50+/-20 Ω; The test result of this HDMI data line is good, meets the user demand of Universal HDMI data line.
When signal transmits in medium, signal is decayed.The principal element of impact decay has: dielectric loss, metal loss, radiation loss, signal self character and load characteristic.Conventionally the method for tackling decay and extending transmission distance has: increase power, increase relaying (relaying: acknowledge(ment) signal also amplifies shaping to signal sends out then) or the less decay of signal source.
Yet the principle that data line of the present invention is extended transmission distance is as follows:
When signal transmits in medium, signal also will be subject to electromagnetic interference or other disturb, and produces noise.At the signal that is mingled with noise, arrive after receiving terminal the more difficult really useful signal that identifies of receiving terminal.Therefore, at receiving terminal, be connected with high pass RC filter circuit between signal transmission terminal and cable, high pass RC filter circuit filters low frequency noise, allows high-frequency signal pass through, and makes that receiving terminal is more easy to identify goes out real useful signal.In the situation that other conditions are identical, owing to being provided with the data line of RC filter circuit, can be more easy to identify go out real useful signal, therefore, and this data line proper extension transmission range, receiving terminal also can obtain signal clearly.
The foregoing is only one embodiment of the present invention, is not whole execution modes, and the variation of any equivalence that those of ordinary skills take technical solution of the present invention by reading specification of the present invention, is claim of the present invention and contains.
Claims (8)
1. a data line, comprise source joint connector, receiving terminal joint connector and the cable between source joint connector and receiving terminal joint connector, it is characterized in that: described data line is also provided with the RC filter circuit that is connected in receiving terminal joint connector.
2. data line as claimed in claim 1, is characterized in that: described RC filter circuit is connected between the signal transmission terminal and cable of receiving terminal joint connector.
3. data line as claimed in claim 2, is characterized in that: described RC filter circuit comprises resistance and electric capacity, and described electric capacity and resistance are the relation of being connected in parallel.
4. data line as claimed in claim 3, is characterized in that: described RC filter circuit is designed to high pass circuit.
5. data line as claimed in claim 2, is characterized in that: the signal transmission terminal of described receiving terminal joint connector comprises some differential pair terminal group, and described RC filter circuit connects differential pair terminal group.
6. data line as claimed in claim 5, is characterized in that: described differential pair terminal group is provided with four groups; The first differential pair terminal group for transmission pulse signal comprises the first conducting terminal and the 3rd conducting terminal, for the second differential pair terminal group of transmission pulse signal, comprise the 4th conducting terminal and the 6th conducting terminal, for the 3rd differential pair terminal group of transmission pulse signal, comprise the 7th conducting terminal and the 9th conducting terminal; Described the first conducting terminal, the 3rd conducting terminal, the 4th conducting terminal, the 6th conducting terminal, the 7th conducting terminal and the 9th conducting terminal are all connected with RC filter circuit.
7. data line as claimed in claim 6, is characterized in that: the 4th differential pair terminal group for transmit clock signal in described differential pair terminal group comprises the tenth conducting terminal and the 12 conducting terminal; The tenth conducting terminal and the 12 conducting terminal are all connected with RC filter circuit.
8. data line as claimed in claim 2, is characterized in that: between the signal transmission terminal of described source joint connector and cable, be also connected with another RC filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233218.2A CN103531977B (en) | 2012-07-06 | 2012-07-06 | Data transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233218.2A CN103531977B (en) | 2012-07-06 | 2012-07-06 | Data transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103531977A true CN103531977A (en) | 2014-01-22 |
| CN103531977B CN103531977B (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210233218.2A Expired - Fee Related CN103531977B (en) | 2012-07-06 | 2012-07-06 | Data transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103531977B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486652A (en) * | 2014-11-06 | 2015-04-01 | 常州市荣顺电子有限公司 | Cable television set top box connection wire |
| CN105703181A (en) * | 2015-12-25 | 2016-06-22 | 北京长峰微电科技有限公司 | USB data EMI shielding transmission line |
| CN105896197A (en) * | 2016-05-26 | 2016-08-24 | 江苏省东方世纪网络信息有限公司 | Data cable connector |
| CN110600955A (en) * | 2018-06-11 | 2019-12-20 | 仁宝电脑工业股份有限公司 | Transmission line with filtering function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009026595A (en) * | 2007-07-19 | 2009-02-05 | Hitachi Kokusai Electric Inc | Cable |
| CN201910554U (en) * | 2010-11-26 | 2011-07-27 | 深圳市巨潮科技有限公司 | DVI (digital visual interface) signal transmitting device supporting long-distance transmission |
| CN102176578A (en) * | 2010-12-30 | 2011-09-07 | 今皓光电（昆山）有限公司 | Multifunctional precision high-speed two-way transmission data line |
| CN102437487A (en) * | 2010-09-29 | 2012-05-02 | 微盟电子(昆山)有限公司 | Electrical connector assembly with surge isolating function |
-
2012
- 2012-07-06 CN CN201210233218.2A patent/CN103531977B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009026595A (en) * | 2007-07-19 | 2009-02-05 | Hitachi Kokusai Electric Inc | Cable |
| CN102437487A (en) * | 2010-09-29 | 2012-05-02 | 微盟电子(昆山)有限公司 | Electrical connector assembly with surge isolating function |
| CN201910554U (en) * | 2010-11-26 | 2011-07-27 | 深圳市巨潮科技有限公司 | DVI (digital visual interface) signal transmitting device supporting long-distance transmission |
| CN102176578A (en) * | 2010-12-30 | 2011-09-07 | 今皓光电（昆山）有限公司 | Multifunctional precision high-speed two-way transmission data line |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486652A (en) * | 2014-11-06 | 2015-04-01 | 常州市荣顺电子有限公司 | Cable television set top box connection wire |
| CN105703181A (en) * | 2015-12-25 | 2016-06-22 | 北京长峰微电科技有限公司 | USB data EMI shielding transmission line |
| CN105896197A (en) * | 2016-05-26 | 2016-08-24 | 江苏省东方世纪网络信息有限公司 | Data cable connector |
| CN110600955A (en) * | 2018-06-11 | 2019-12-20 | 仁宝电脑工业股份有限公司 | Transmission line with filtering function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103531977B (en) | 2016-06-08 |
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Granted publication date: 20160608 Termination date: 20190706 |