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Signal transmission cable terminal device and data transmission method using signal transmission cable

A signal transmission and cable technology, applied in the structural field of cables for high-speed differential signals, can solve the problems of increased safety factor, inability to obtain strength and signal transmission performance, etc. The effect of the crosstalk feature

Inactive Publication Date: 2005-03-09
SUMITOMO ELECTRIC IND LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the main factors that determine the cable diameter are mechanical strength and attenuation limitation. However, when the cable diameter is reduced by simply reducing or reducing the diameter of each component, sufficient strength and signal transmission performance cannot be obtained.
[0008] However, if the cable length of 2.5m or less is taken as the premise, in the central copper wire conductor size AWG30~AWG28, the safety factor increases relative to the limit value of attenuation
In addition, the size of the conductor has the following problem. When the existing double-neck structure is adopted, the finished shape of the formed cable is too thick, reaching about 4.8mm

Method used

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  • Signal transmission cable terminal device and data transmission method using signal transmission cable
  • Signal transmission cable terminal device and data transmission method using signal transmission cable
  • Signal transmission cable terminal device and data transmission method using signal transmission cable

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Embodiment Construction

[0070] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0071] Such as figure 1 As shown, the signal transmission cable 1 of the first embodiment of the present invention has the following structure, twisting four insulated wires 6 made of an insulating-coated center conductor to form a four-core structural wire 3, and an insulating tape 11 or a metal The outer side is covered with a tape, and then covered with an outer shield made of a metal mesh 13 whose outer diameter is 3 mm or less. Here, the central conductor is formed by splicing seven central conductors 4 . Then, the outer side is covered with an insulating coating layer 7 made of fluororesin, polyethylene, or foamed polyethylene to form an insulated wire 6 . The signal transmission cable 1 is 2.5m long, and the diameter of the central conductor constituting the insulated wire 6 is reduced to less than 0.2mm to meet the limit value of attenuation and mec...

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Abstract

A four-core cable of small diameter and high strength for high-speed differential signal, in which four insulated wires (center conductors) are bundled, the circumference thereof is covered by a metal net and an insulating housing. The size of the center conductor wire is reduced, a twisted pair wire is changed to a quad structural wire, and its outer diameter is set to be 3 mm or under so as to satisfy the specified value of attenuation with the cable length of 2.5 m.

Description

technical field [0001] The present invention relates to a cable for signal transmission, a terminal device, and a data transmission method using a cable for signal transmission, and in particular to a high-speed serial interface for connecting a computer called IEEE1394 and its peripheral equipment, which does not require power supply The structure of the high-speed differential signal cable with a small diameter and high strength characteristics used in the industry. Background technique [0002] In IEEE1394, use such as Figure 7 Perform power supply as shown in "IEEE1394-1995 Standard" and Figure 8 "Standard for a High Performance Serial Bus (Amendment 1) (hereinafter referred to as Amendment 1 of the IEEE1394-1395 standard)) without power supply is shown. The above assumes that the maximum cable length of IEEE1394 is 4.5m. [0003] Such as Figure 8 As shown, the cable of this Amendment 1 is constituted as follows: two twisted pair wires 102 are further twisted, cover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B11/02H01B11/00H01B11/04H01B11/10
CPCH01B11/10H01B11/005H01B11/1033
Inventor 高桥宏和辻野厚横井清则大塚裕之
Owner SUMITOMO ELECTRIC IND LTD
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