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Cable for LVDS (Low-voltage Differential Signal) transmission

A signal transmission and cable technology, which is applied in the field of signal transmission wiring harness and its production process, can solve the problems affecting signal quality, etc., and achieve the effect of meeting the requirements of the use environment, light weight, good vacuum stability and ozone resistance

Inactive Publication Date: 2012-03-28
BEIJING INST OF ELECTRONICS SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the existing domestic medium used for LVDS signal transmission affects the signal quality in the process of realizing long-distance transmission, the present invention designs a cable for LVDS signal transmission

Method used

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  • Cable for LVDS (Low-voltage Differential Signal) transmission
  • Cable for LVDS (Low-voltage Differential Signal) transmission

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specific Embodiment approach 1

[0019] Specific implementation mode one: see figure 1 Describe the cable used for LVDS signal transmission described in this embodiment. The wire harness described in this embodiment is composed of two wire harnesses 1, a shielding layer 3 and a sheath 4, and each wire harness 1 is wrapped with an insulating layer 2. The two wire harnesses 1 are located inside the shielding layer 3, and the sheath 4 is located outside the shielding layer 3. The outer diameter of the shielding layer 3 is 1.05mm±0.03mm. Each wire harness 1 is composed of multiple wires twisted. The diameter is 0.16mm.

specific Embodiment approach 2

[0020] Specific embodiment 2: This embodiment is a further limitation of the structure of the wire harness 1 in the cable for LVDS signal transmission described in the specific embodiment 1. In this embodiment: each wire harness 1 can be composed of 7 wires Twisted composition, the nominal outer diameter of the 7 wires after twisted should be 0.48mm±0.01mm.

[0021] In the 7-wire twisting process, the stability of the pitch and outer diameter must be strictly controlled, that is, to ensure the consistency of the outer diameter of the entire wire harness 1.

[0022] In this embodiment, the pitch diameter ratio of the wire harness should not be greater than 16 and not less than 8, and the optimal parameter is 10±1.

[0023] The length asymmetry of the wire harness in this embodiment should not be greater than 5%.

[0024] The tension of the wire harness in this embodiment should be uniform.

[0025] In this embodiment, the wire may be a silver-plated copper wire, a silver-plat...

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment is a further limitation of the cable structure for LVDS signal transmission described in Embodiment 1. In this embodiment, the insulating layer 2 is extruded by extrusion-grade polytetrafluoroethylene dispersion resin. Made or sintered by wrapping PTFE turning film.

[0032] When the insulating layer 2 is extruded from extrusion-grade polytetrafluoroethylene dispersion resin, the extruded concentricity should not be less than 90%. During the extrusion process of the insulating layer 2, the extruded concentricity and outer diameter should be strictly controlled.

[0033] When the insulating layer 2 is formed by wrapping and sintering 1 to 3 layers of polytetrafluoroethylene turning film, the wrapping overlapping ratio should be controlled by 50-52%, or 67-69% or 75-77%, so that the insulation The layer thickness is uniform. The outer diameter of the insulating layer 2 is 1.05mm±0.03mm. During the wrapping process of the insulating layer 2,...

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Abstract

The invention relates to a signal transmission cable, in particular to a cable for LVDS (Low-voltage Differential Signal) transmission, which solves the problem that the conventional mediums for LVDS transmission in China affect signal quality during long-distance transmission. The cable includes two wire harnesses, a shielding layer and a sheath, wherein each wire harness is wrapped by an insulation layer, the two wire harnesses are located in the shielding layer, the sheath is located on the outer side of the shielding layer, each wire harness is formed by a plurality of wires which are twisted, the diameter of each wire is 0.16mm, the pitch diameter of each wire harness is no larger than 16 and no smaller than 8, each insulation layer is formed through the winding and sintering of 1-3 layers of turned polytetrafluoroethylene films, the shielding layer is formed through the weaving of soft round silver-plated wires, and the sheath is formed through the winding and sintering of polyimide / fluoroplastic laminated films. The signal transmission distance of the cable provided by the invention reaches 1,000mm-3,000mm; and the cable has high vacuum stability and ozone resistance and better irradiation-resisting performance, and can meet the service environment requirements of the outer space.

Description

technical field [0001] The application relates to a signal transmission wire harness and a production process thereof. Background technique [0002] The low-voltage swing LVDS (Low-Voltage Differential Signal) technology meets the requirements of high bandwidth, low power consumption, small structure size, low electromagnetic radiation and high noise tolerance for image information transmission, and improves the high-speed system for the system. Data transmission, suppression of common mode noise and ability to reduce power consumption meet the requirements of high-speed data transmission. It has been widely used, such as high-speed CCD image real-time acquisition system, radar signal processing system, etc., and the United States has already applied it to satellites. [0003] At present, there are many studies on LVDS signal printed circuit board design and PCB transmission line design, which are quite mature. However, there are few studies on the interconnection between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B11/00H01B5/08H01B1/02
Inventor 李存洲邵云峰董淑英薛健夏文涛李君龙
Owner BEIJING INST OF ELECTRONICS SYST ENG
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