Storage Drive Power Noise Testing With Relay-Switched Injection Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current power noise susceptibility tests for storage devices, such as HDDs and SSDs, require manual operation, are prone to human errors, and can only test one device at a time, making them inefficient and difficult to scale for full frequency bandwidth coverage.
Innovation Solution
An automated power noise susceptibility test system using multiple relays, operational amplifiers, and power amplifier injection circuits to selectively provide noise to storage devices across various frequency bands, eliminating the need for manual setup and enabling simultaneous testing of multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual power noise susceptibility testing is used, then the testing process is simple to understand, but it requires manual operation, is prone to human errors, and can only test one device at a time
Solution Approach 1:
The testing system is divided into multiple independent noise injection modules, each capable of testing one storage device. Multiple modules can operate simultaneously to test multiple devices in parallel, thereby increasing throughput while maintaining modular simplicity
Solution Approach 2:
Each noise injection module is designed with universal functionality to handle various frequency bands (low frequency path with capacitor injection circuit and high frequency path with power amplifier injection circuit) and different power supply voltages, allowing a single module to perform multiple testing functions
2Adaptability or versatility
If manual testing is used, then the setup is straightforward, but it is inefficient and difficult to scale for full frequency bandwidth coverage
Solution Approach 1:
The system includes dynamic switching mechanisms using relays (first relay for path selection, second relay for frequency band selection, third relay for noise function selection) that automatically configure the testing path based on the required frequency band, enabling full frequency bandwidth coverage without manual reconfiguration
Solution Approach 2:
The system pre-configures multiple paths (low frequency path with capacitor injection circuit and high frequency path with power amplifier injection circuit) and noise functions before testing begins, allowing immediate switching between different frequency bands and reducing setup time
3Reliability
If automated testing with multiple paths is implemented, then full frequency bandwidth coverage is achieved, but the device complexity increases
Solution Approach 1:
Different parts of the system are optimized for specific frequency ranges: the capacitor injection circuit is optimized for low frequency noise injection, while the power amplifier injection circuit is optimized for high frequency noise injection. This localized optimization improves testing accuracy for each frequency band while managing overall complexity
Data Source
AI summary
Automated power noise susceptibility test systems are provided for one or more storage devices. A system includes a host; storage devices; and multiple noise injection modules. Each noise injection module includes: a first relay to a third relay, which are coupled to a first path or a second path. The first path includes: an operational amplifier for generating a high noise function; a first variable regulator for generating a first or second regulated power supply voltage; and a capacitor injection circuit for generating low noise function and a first power noise. The second path includes: a second variable regulator for generating a third or fourth regulated power supply voltage and a power amplifier injection circuit for generating a second power noise. The third relay selectively provides the storage device the first power noise or the second power noise.