CN107454816A - A kind of line system for reducing preposition VGA cable interference - Google Patents
A kind of line system for reducing preposition VGA cable interference Download PDFInfo
- Publication number
- CN107454816A CN107454816A CN201710661530.4A CN201710661530A CN107454816A CN 107454816 A CN107454816 A CN 107454816A CN 201710661530 A CN201710661530 A CN 201710661530A CN 107454816 A CN107454816 A CN 107454816A
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- CN
- China
- Prior art keywords
- preposition
- vga
- platelet
- cable
- mainboard
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0054—Casings specially adapted for display applications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0062—Structures of standardised dimensions, e.g. 19" rack, chassis for servers or telecommunications
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention discloses a kind of line system for reducing preposition VGA cable interference, it is related to electromagnetic compatibility technology, including being arranged on the mainboard of cabinet inside, the preposition platelet at case front panel, and the display outside cabinet, IC and a VGA connector are provided with mainboard, filter circuit is provided with preposition platelet, connector is connected to filter circuit by Internal cable, and filter circuit is connected to display by external cable；VGA signals on mainboard arrive at VGA connector after being come out from IC, then reach the filter circuit at preposition platelet by Internal cable, pass through external cable arrival display after filtered circuit.The present invention, which greatly reduces external VGA cable and is disturbed, to be caused to radiate exceeded risk, while is reduced external interference and entered mainboard from external VGA cable and influence the risk of mainboard normal work, is improved VGA signal transmission qualities, is maintained mainboard normal work stability.
Description
Technical field
The present invention relates to electromagnetic compatibility technology, specifically a kind of line system for reducing preposition VGA cable interference.
Background technology
Electromagnetic interference（Electromagnetic Interference abbreviations EMI）, refer to that electromagnetic wave is made with electronic component
With rear and caused interference phenomenon, including two kinds of Conduction Interference and radiation interference.Conduction Interference is one by conducting medium
Signal on electric network is coupled to another electric network.Radiation interference is that its signal is coupled to another by interference source by space
Electric network.In High-Speed PCB and system design, high-frequency signal line, the pin of integrated circuit, all kinds of connectors may all have day
The radiation interference of line characteristic, launch electromagnetic wave and have influence on the normal work of other subsystems in other systems or the system.
For server system, electromagnetic interference is a serious and ever-increasing environmental pollution form, caused
Crack as low as caused by broadcast reception is influenceed, big to the vital control system collapse of safety, even resulting in draw
Return fatal accident.Radiation interference be than more serious form of electromagnetism interruption, server EMI suppression design in, external cable
EMI suppression design be a very important link.
VGA signals connect preposition cable in the mainboard of server, be reduce preposition cable to external radiation, typically exist
Series filtering circuit on VGA signals.There is " π " type filter circuit of a capacitance-inductance-capacitive on every VGA line road.Such as
Shown in accompanying drawing 1, after the VGA signals on mainboard come out IC, circuit, arrives at connector, is then connected by Internal cable after filtering
It is connected at the preposition platelet of case front panel, preposition platelet is then connected to by display by external cable.
In the transmission line of existing VGA signals, the protection signal on VGA line road is all placed on mainboard end, and VGA signals are filtering
After end, during connector, easy crosstalk enters interference signal；Equally, in the transmission of cable internally of VGA signals
Easy crosstalk enters interference signal.In addition, interference signal flows into external cable by preposition platelet, by the antenna of radiation test site
Receive, cause radiation interference test crash.Also, in anti-interference project is radiated, crosstalk enters on external cable interference signal
" pouring in down a chimney " enters in mainboard, easily causes mainboard property abnormality.
At present, the shell generally use plastic material of front of computer case platelet, although some inside coat conductive paint,
Compared to metal material, the electric conductivity of preposition platelet shell is very weak.So, even if effective filtering has been accomplished on VGA line road, filter out
Interference to preposition platelet ground level is also nowhere released.
The content of the invention
Demand and weak point of the present invention for the development of current technology, there is provided a kind of to reduce what preposition VGA cable was disturbed
Line system.
A kind of line system for reducing preposition VGA cable interference of the present invention, solves the skill that above-mentioned technical problem uses
Art scheme is as follows：It is described to reduce the line system of preposition VGA cable interference, including before being arranged on the mainboard of cabinet inside, cabinet
Preposition platelet at panel, and the display outside cabinet is arranged on, IC and VGA connections are provided with mainboard
Device, filter circuit and preposition VGA connector is provided with preposition platelet, VGA connector is connected to wave filtering wire by Internal cable
Road, preposition VGA connector are connected to display by external cable；
VGA signals on mainboard arrive at VGA connector after being come out from IC, are reached by Internal cable at preposition platelet
Filter circuit, after filtered circuit filters out, by preposition VGA connector through external cable reach display.
Preferably, " π " type filter circuit is set on preposition platelet.
Preferably, the shell of preposition platelet is arranged to metal shell；Outside the metal shell and cabinet metal of preposition platelet
Shell is connected with establishing with the earth.
Preferably, the metal shell of preposition platelet is fixed on preposition platelet by metal screws, outside the metal of preposition platelet
Shell is fixedly connected by metal screws with cabinet metal shell.
Preferably, conducting foam is set between the metal shell of the shell of preposition VGA connector and preposition platelet.
A kind of line system for reducing preposition VGA cable interference of the present invention, what is had compared with prior art is beneficial
Effect is：The present invention is applied to generic server, solves filter circuit crosstalk can not be entered to the interference signal on VGA line road and filter out
The problem of, solve the problems, such as that external interference signals become owner of plate from external VGA line cable interference, while solve preposition platelet Horizon
The problem of interference on face is nowhere released；Greatly reduce external VGA cable and be disturbed and cause to radiate exceeded risk, drop simultaneously
Low external interference enters mainboard from external VGA cable and influences the risk of mainboard normal work, improves VGA signals transmission matter
Amount, maintains mainboard normal work stability, improves the Electro Magnetic Compatibility of server product.
Brief description of the drawings
Accompanying drawing 1 is the schematic diagram on traditional VGA line road；
Accompanying drawing 2 is the schematic diagram of line system described in embodiment 1；
Accompanying drawing 3 is the schematic diagram of line system described in embodiment 2.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, to this hair
A kind of bright line system for reducing preposition VGA cable interference is further described.
In view of the problem of string interference in server in the transmitting procedure of VGA signals be present, the present invention proposes a kind of reduction
The line system of preposition VGA cable interference, by filter circuit from the IC ends on mainboard, is moved on on preposition platelet, so, from mainboard
Upper All other routes crosstalk enters the interference signal on VGA line road, out of cabinet crosstalk enter the interference signal of Internal cable, put before entry
Can largely it be filtered out by filter circuit during platelet；Meanwhile exterior space crosstalk enters the interference signal of external cable, arrived " pouring in down a chimney "
Filtered out during preposition platelet by filter circuit.It can be seen that the present invention solves the interference that filter circuit can not enter crosstalk on VGA line road
The problem of target signal filter, solve the problems, such as that external interference signals become owner of plate from external VGA line cable interference.
Embodiment:1：
The present embodiment proposes a kind of line system for reducing preposition VGA cable interference, as shown in Figure 2, the line system bag
The mainboard for being arranged on cabinet inside, the preposition platelet at case front panel are included, and is arranged on the display outside cabinet, mainboard
On be provided with IC and a VGA connector, filter circuit and preposition VGA connector, connector are set on preposition platelet
Filter circuit is connected to by Internal cable, preposition VGA connector is connected to display by external cable；VGA on mainboard
Signal arrives at VGA connector after being come out from IC, then reaches the filter circuit at preposition platelet by Internal cable,
After filtered circuit filters out, display is reached through external cable by preposition VGA connector.
The line system of the preposition VGA cable interference of the reduction, filter circuit is removed from mainboard, but on preposition platelet
Filter circuit is set, All other routes crosstalk on most of mainboard can be entered the interference signal on VGA line road, and gone here and there out of cabinet
The interference signal disturbed into Internal cable filters out；Also, most of cabinet exterior space crosstalk can also be filtered out and enter external connection
The interference wire size of cable.If repeating to set filter circuit in VGA line road, the decay of VGA working signals on circuit can be caused, is influenceed
The service behaviour on VGA line road, therefore filter circuit can not be set again on mainboard.
Embodiment 2：
The line system of preposition VGA cable interference is reduced described in the present embodiment, on the basis of embodiment 1, in case front panel
Preposition platelet on set " π " type filter circuit, " π " type filter circuit is capacitance-inductance-capacitive, can be effectively filtered out
All other routes crosstalk enters the interference signal on VGA line road on mainboard, while can effectively filter out crosstalk in cabinet and enter Internal cable
Disturb wire size.In addition, cabinet exterior space crosstalk enters the interference signal of external cable, can quilt when " pouring in down a chimney " arrives preposition platelet
" π " type filter circuit filters out.
In the line system of embodiment 2, the shell of preposition platelet is arranged to metal shell at case front panel；Preposition platelet
Metal shell and cabinet metal shell with the earth establish be connected, as shown in Figure 3.And will be preposition small using metallic screw
Plate is fixed with its metal shell, is fixed the metal shell of preposition platelet and cabinet metal shell using metallic screw
Come, further enhance the good earth of preposition platelet, cabinet.So, the major part after preposition platelet filter circuit is done
Signal is disturbed, connects by metal shell and releases, be not present in the ground level of preposition platelet, external cable is may not flow into and makes
Into electromagnetic interference risk, while avoid interference signal and flow back to mainboard along Internal cable and influence mainboard normal work.
Meanwhile conducting foam is set between the shell of preposition VGA connector and the metal shell of preposition platelet, by leading
Electric foam strengthens the overlap joint of preposition VGA connector shell and preposition platelet shell.So, interference electric current passes through " π " from Internal cable
Enter preposition platelet ground level after type filter circuit, before then being imported through metallic screw and the conducting foam of preposition VGA connector
The metal shell of platelet is put, finally the metal shell through preposition platelet imports cabinet and the earth, releases.
Embodiment is only the specific case of the present invention, and scope of patent protection of the invention is including but not limited to above-mentioned
Embodiment, any person of an ordinary skill in the technical field that meet claims of the present invention and any is to it
The appropriate change or replacement done, it should all fall into the scope of patent protection of the present invention.
Claims (5)
- A kind of 1. line system for reducing the interference of preposition VGA cable, it is characterised in that including be arranged on cabinet inside mainboard, Preposition platelet at case front panel, and the display outside cabinet is arranged on, it is provided with IC on the mainboard With a VGA connector, filter circuit and preposition VGA connector are provided with the preposition platelet, the VGA connector passes through interior Portion's cable is connected to the filter circuit, and the preposition VGA connector is connected to the display by external cable；VGA signals on the mainboard arrive at the VGA connector after being come out from IC, and institute is reached by Internal cable The filter circuit at preposition platelet is stated, after filtered circuit filters out, is reached and shown through external cable by the preposition VGA connector Show device.
- 2. a kind of line system for reducing preposition VGA cable interference according to claim 1, it is characterised in that described preposition " π " type filter circuit is set on platelet.
- 3. a kind of line system for reducing preposition VGA cable interference according to claim 2, it is characterised in that described preposition The shell of platelet is arranged to metal shell；Metal shell, the cabinet metal shell of the preposition platelet are connected with establishing with the earth.
- 4. a kind of line system for reducing preposition VGA cable interference according to claim 3, it is characterised in that described preposition The metal shell of platelet is fixed on the preposition platelet by metal screws, and the metal shell of the preposition platelet passes through metal spiral shell Silk is fixedly connected with cabinet metal shell.
- 5. a kind of line system for reducing preposition VGA cable interference according to claim 4, it is characterised in that described preposition Conducting foam is set between the metal shell of the shell of VGA connector and the preposition platelet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710661530.4A CN107454816A (en) | 2017-08-04 | 2017-08-04 | A kind of line system for reducing preposition VGA cable interference |
| PCT/CN2017/119213 WO2019024407A1 (en) | 2017-08-04 | 2017-12-28 | Circuit system for reducing front vga cable interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710661530.4A CN107454816A (en) | 2017-08-04 | 2017-08-04 | A kind of line system for reducing preposition VGA cable interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107454816A true CN107454816A (en) | 2017-12-08 |
Family
ID=60490825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710661530.4A Pending CN107454816A (en) | 2017-08-04 | 2017-08-04 | A kind of line system for reducing preposition VGA cable interference |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107454816A (en) |
| WO (1) | WO2019024407A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966558A (en) * | 2018-08-23 | 2018-12-07 | 郑州云海信息技术有限公司 | A kind of Low emissivity mounting structure of the preposition cable of server |
| CN109068559A (en) * | 2018-10-17 | 2018-12-21 | 南京沃福曼医疗科技有限公司 | A method of reducing the radiation of OCT equipment DVI video interface |
| WO2019024407A1 (en) * | 2017-08-04 | 2019-02-07 | 郑州云海信息技术有限公司 | Circuit system for reducing front vga cable interference |
| CN109542819A (en) * | 2018-11-26 | 2019-03-29 | 郑州云海信息技术有限公司 | A kind of preposition I/O port of server and the implementation method for improving EMC performance |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2462454Y (en) * | 2000-12-18 | 2001-11-28 | 联想(北京)有限公司 | Integratedly set I/O interface board |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7670147B1 (en) * | 2008-10-16 | 2010-03-02 | Elka International Ltd. | Capacitance circuit board signal-adjusting device |
| CN103036115A (en) * | 2011-09-29 | 2013-04-10 | 鸿富锦精密工业（深圳）有限公司 | Video graphic array (VGA) connector |
| CN102411405B (en) * | 2011-11-16 | 2014-09-17 | 武汉光动能科技有限公司 | High-performance novel television-computer integrated machine |
| CN102622942B (en) * | 2012-04-18 | 2014-03-12 | 钟瑞芬 | Liquid crystal display capable of working in high magnetic field |
| CN202564752U (en) * | 2012-05-09 | 2012-11-28 | 浪潮电子信息产业股份有限公司 | Front VGA cable having 260-degree annular head joint |
| CN107454816A (en) * | 2017-08-04 | 2017-12-08 | 郑州云海信息技术有限公司 | A kind of line system for reducing preposition VGA cable interference |
-
2017
- 2017-08-04 CN CN201710661530.4A patent/CN107454816A/en active Pending
- 2017-12-28 WO PCT/CN2017/119213 patent/WO2019024407A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462454Y (en) * | 2000-12-18 | 2001-11-28 | 联想(北京)有限公司 | Integratedly set I/O interface board |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019024407A1 (en) * | 2017-08-04 | 2019-02-07 | 郑州云海信息技术有限公司 | Circuit system for reducing front vga cable interference |
| CN108966558A (en) * | 2018-08-23 | 2018-12-07 | 郑州云海信息技术有限公司 | A kind of Low emissivity mounting structure of the preposition cable of server |
| CN108966558B (en) * | 2018-08-23 | 2020-09-18 | 苏州浪潮智能科技有限公司 | Low-radiation installation structure of front cable of server |
| CN109068559A (en) * | 2018-10-17 | 2018-12-21 | 南京沃福曼医疗科技有限公司 | A method of reducing the radiation of OCT equipment DVI video interface |
| CN109542819A (en) * | 2018-11-26 | 2019-03-29 | 郑州云海信息技术有限公司 | A kind of preposition I/O port of server and the implementation method for improving EMC performance |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019024407A1 (en) | 2019-02-07 |
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171208 |
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| RJ01 | Rejection of invention patent application after publication |