Flexible Differential Probe Tip Impedance Loading for Noise Reduction
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Solution Overview
Problem
Differential probe tips used for measuring high voltages are susceptible to common mode noise and lose flexibility when impedance is added with rigid ferrites.
Innovation Solution
Incorporation of discrete magnetic components and elastomer materials in the probe tip cable assembly to provide impedance loading while maintaining flexibility, allowing user-adjustable placement and number of magnetic components to manage common mode noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rigid ferrites are added to the cable tip to provide impedance loading, then common mode noise is reduced, but flexibility of the tip is lost
Solution Approach 1:
The patent divides the cable into multiple sections with discrete ferrite beads placed at specific intervals rather than using a continuous rigid ferrite structure. This segmentation allows the cable to maintain flexibility while still providing impedance loading to reduce common mode noise at critical points along the cable length.
Solution Approach 2:
The patent applies ferrite impedance loading only at specific locations along the cable where it is most needed for noise reduction, rather than making the entire cable rigid. This localized application maintains overall cable flexibility while providing noise suppression where it has the greatest impact on measurement accuracy.
2Measurement precision
If impedance loading is added to reduce common mode noise, then measurement accuracy is improved, but cable flexibility deteriorates
Solution Approach 1:
By using discrete ferrite beads segmented along the cable rather than continuous rigid ferrite, the patent achieves impedance loading for improved measurement accuracy while preserving cable flexibility through the segmented structure that allows bending and movement.
Solution Approach 2:
The patent combines flexible cable material with discrete ferrite beads to create a composite structure that exhibits both the flexibility of the cable material and the impedance-loading properties of the ferrite beads, achieving both measurement accuracy and operational flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a flexible cable that retains impedance loading to effectively reduce common mode noise, enhancing the performance of differential probes.
Implementation Method 1
a magnetic material external to the one or more conductors
Implementation Method 2
an elastomer material external to the two or more conductors
Data Source
AI summary
A cable assembly has a connector to receive a signal, a cable connected to the connector, the cable having a length and one or more conductors along at least part of the length to conduct the signal, a magnetic material external to the one or more conductors, and an elastomer material external to the one or more conductors. A cable assembly has a connector to receive a differential signal, a cable connected to the connector having symmetric pair conductors, one or more discrete magnetic components spaced along the length of the cable, and one or more elastomer components next to at least one of the one or more magnetic components. A cable assembly has a connector to receive a differential signal, a cable connected to the connector having symmetric pair conductors, an elastomer material at least partially enclosing the cable, and a magnetic material at least partially enclosing the cable.