Differential Paired Cable Compensation for Intra-Pair Skew
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Solution Overview
Problem
Differential paired cables face significant challenges in controlling intra pair skew, leading to increased manufacturing costs and wastage due to accumulating skew issues, which limit the cable length and require strict process adjustments.
Innovation Solution
The implementation of a differential paired cable with compensation functions, including controlled length and diameter differences between wires and insulating layers, and welding portions, to adjust signal transmission rates and reduce intra pair skew.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If strict process control is implemented to minimize intra pair skew, then manufacturing precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent changes the physical parameters of the cable structure by introducing deliberate diameter differences between wires (first wire larger than second wire) and length differences in insulating layers and welding portions. These parameter changes create built-in compensation mechanisms that automatically counteract skew accumulation, eliminating the need for complex real-time process control while maintaining precision
Solution Approach 2:
The patent applies preliminary action by pre-configuring the diameter and length differences during manufacturing. The first wire is made with a larger diameter and the first insulating layer with a longer exposed length before the cable is assembled. These preliminary structural adjustments create compensation effects that proactively counteract skew issues throughout the cable's length, rather than requiring complex control during operation
2Adaptability or versatility
If cable length is increased to meet application requirements, then adaptability is improved, but intra pair skew accumulates and manufacturing precision deteriorates
Solution Approach 1:
The patent introduces diameter differences between the first and second wires as a compensating parameter. The first wire has a larger diameter than the second wire, which changes the signal transmission characteristics. This parameter change creates a compensation effect that counteracts the accumulation of intra pair skew over longer cable lengths, enabling extended cable lengths while maintaining signal integrity
Solution Approach 2:
The patent deliberately introduces asymmetry into the previously symmetric cable structure. The first wire is made with a larger diameter, the first insulating layer has a longer exposed length, and the first welding portion has a different length than the second. These asymmetric modifications create differential compensation effects that counteract skew accumulation, allowing longer cable lengths without deteriorating manufacturing precision
3Ease of manufacture
If symmetric cable structure is used with equal wire diameters and insulating layer lengths, then ease of manufacture is improved, but intra pair skew cannot be compensated
Solution Approach 1:
The patent modifies specific parameters of the cable components: the first wire diameter is made larger than the second wire diameter, the first insulating layer exposed length is made longer than the second, and the welding portion lengths are made different. These parameter changes introduce compensation capabilities while maintaining relatively simple manufacturing processes
Solution Approach 2:
The patent applies local quality by making specific localized modifications to certain parts of the cable structure. The first wire has a larger diameter at specific sections, the first insulating layer has a longer exposed portion at the end, and the welding portions have different lengths. These localized quality differences create compensation effects without requiring complete redesign of the entire cable structure, thus maintaining ease of manufacture while improving reliability
Data Source
AI summary
The present invention provides a differential paired cable with compensation functions, including: a first wire; a second wire; a first insulating layer; a second insulating layer; a ground wire; and a shielding layer. By controlling at least one of a length difference between the first insulating layer and the second insulating layer exposed outside of the shielding layer to be greater than 0.1 mm, a diameter difference between the first wire and the second wire to be greater than 0.005 mm, and a length difference between a welding portion of the first wire and a welding portion of the second wire to be greater than 0.05 mm, a signal transmission rate of one of the first wire and the second wire is compensated, so as to reduce an intra pair skew of the differential paired cable.