Motorized Switching Attenuator for Automated Dynamic Range Testing
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Solution Overview
Problem
Conventional test and measurement instruments require manual installation of external coaxial terminators and attenuators for dynamic range adjustment, leading to inefficiencies, errors, and complications in automation, and introduce noise or timing distortions.
Innovation Solution
A switching attenuator mechanism with automated positioning and S-parameter correction, allowing for on-the-fly dynamic range switching and automated testing across various signaling standards, including PCIe Gen 7 and 256 GBd Ethernet, using a small geometry switching mechanism with conductive paths and motors to adjust signal routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual installation of external coaxial terminators and attenuators is used for dynamic range adjustment, then the instrument can change dynamic range between operations, but the process becomes inefficient, error-prone, and complicated for automation
Solution Approach 1:
The patent integrates multiple functions (attenuation, termination, switching) into a single integrated circuit board assembly that can be automatically switched between different configurations. This merging eliminates the need for manual installation of separate external components while maintaining dynamic range adjustment capability across different testing scenarios.
Solution Approach 2:
The patent implements automated switching mechanisms that dynamically reconfigure the signal path between different attenuator settings and termination configurations based on the testing requirements. This dynamic reconfiguration enables rapid adaptation to different dynamic range needs without manual intervention, significantly improving testing productivity.
2Adaptability or versatility
If external terminators or attenuators are used for dynamic range adjustment, then the instrument can adapt to different operations, but noise or timing distortions are introduced into the measured signals
Solution Approach 1:
The patent extracts the harmful effects by carefully designing the switching mechanism to minimize parasitic elements and signal path disruptions. The integrated circuit board assembly is configured to maintain consistent signal characteristics across different attenuation settings, effectively removing the noise and timing distortion problems associated with external components.
Solution Approach 2:
The patent introduces an intermediary switching mechanism that seamlessly transitions between different attenuator configurations without exposing the signal to external components that would introduce noise or timing distortions. The switching network acts as an intermediary that maintains signal integrity while enabling dynamic range adjustment.
3Measurement precision
If calibration and correction for errors from external terminators or attenuators are applied, then measurement accuracy can be improved, but the correction process becomes manual and time-consuming
Solution Approach 1:
The patent performs calibration and error correction in advance by characterizing the switching network and attenuator configurations during manufacturing. Correction factors are pre-stored in memory, allowing the system to automatically apply compensations without manual calibration, thus maintaining high measurement precision while eliminating time loss.
Solution Approach 2:
The patent implements automated feedback mechanisms that monitor signal characteristics and automatically apply corrections based on pre-characterized error profiles for each switching configuration. This closed-loop approach maintains measurement precision while eliminating manual calibration steps, significantly reducing the time required for setup and reconfiguration.
4Productivity
If a switching mechanism with multiple conductive paths is implemented for automated dynamic range switching, then automation and efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent segments the switching function into modular components on the circuit board, with each segment handling a specific attenuation range or configuration. This segmentation allows for systematic management of the switching network, making the complex functionality more controllable and maintainable while enabling automated operation across multiple dynamic range settings.
Data Source
AI summary
An apparatus includes a fixed substrate having at least two contact structures, a movable substrate having at least two electrically conductive paths, a housing containing the fixed substrate and the movable substrate, a plurality of connectors in the housing, each connector connecting to one of the at least two contact structures to connect to ground and a spring contact, the plurality of connectors arranged to connect to at least one of the conductive paths depending upon a position of the movable substrate, and a motorized stage in the housing to move the movable substrate to align one of the at least two conductive paths to form a connection between two of the connectors. The apparatus may be part of a test and measurement instrument, and a method of operating the apparatus is also included.