IC Authentication via Quiescent Current and EMI Signatures
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Solution Overview
Problem
The challenge lies in authenticating integrated circuit (IC) devices to ensure they conform to specified standards, as counterfeit devices may mimic authentic ones but have reduced reliability and operational life, making it difficult to distinguish between authentic and counterfeit ICs using existing methods.
Innovation Solution
An integrated test apparatus measures quiescent current and conducted electromagnetic interference (EMI) characteristics of IC devices at multiple voltage steps without a load, comparing these measurements to those of authenticated devices to determine authenticity, utilizing a simplified authentication system that includes a digital-to-analog converter, excitation circuit, and energy calculation circuit to generate a single scaler value for direct comparison.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional authentication methods are used to verify IC device authenticity, then the authentication process becomes complex and costly, but counterfeit devices can still be distinguished; however, if simpler methods are used, then the authentication process becomes easier and cheaper, but the ability to distinguish counterfeit devices is reduced
Solution Approach 1:
The patent changes the measurement parameters from complex functional testing to simple electrical characteristics (quiescent current and EMI) that can be measured with basic equipment. By measuring these parameters at multiple voltage steps and comparing them to reference values, the system achieves accurate counterfeit detection without complex authentication hardware
Solution Approach 2:
The patent replaces complex mechanical/authentication systems with electrical measurements. Instead of using sophisticated authentication protocols or physical inspection methods, the system uses electrical characteristics (current and EMI) that can be measured with simple voltmeters and ammeters, substituting complex systems with simpler electrical measurement approaches
2Measurement precision
If comprehensive testing methods are used to ensure IC device authenticity, then detection accuracy is improved, but the testing time and productivity are reduced
Solution Approach 1:
The patent measures electrical characteristics at multiple voltage steps (excessive action) to ensure accurate counterfeit detection. By taking more measurements than a single-point test, the system builds a more reliable authentication profile that maintains high accuracy while still being faster than comprehensive functional testing
3Measurement precision
If detailed electrical characteristic measurements are taken at multiple voltage steps, then counterfeit detection accuracy is improved, but the measurement process becomes more complex
Solution Approach 1:
The patent segments the authentication process into distinct voltage steps, measuring quiescent current and EMI at each step. This segmentation allows the complex measurement to be broken down into simple, repeatable operations at each voltage level, making the overall process more manageable and easier to implement
Data Source
AI summary
Systems, methods, and apparatuses are described for verifying the authenticity of an integrated circuit device. An integrated test apparatus may use quiescent current and/or conducted electromagnetic interference readings to determine if a device under test matches the characteristics of an authenticated device. Deviations from the characteristics of the authenticated device may be indicative of a counterfeit device.