Automated IC Test Model Generation via Current Path Tracing
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Solution Overview
Problem
Conventional integrated circuit tests and simulations require manual setting of power domain and isolation information, leading to defects such as leakage, prolonged testing time, and missed information, resulting in inefficient and error-prone processes.
Innovation Solution
A method to generate an integrated circuit model by tracing current paths from nodes on a circuit connection net-list, creating a circuit isolation node file and an interface node voltage net-list, which automatically determines power and ground nodes and isolated elements, thereby automating the generation of an integrated circuit voltage model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual setting of power domain and isolation information is used, then engineers can control the testing process, but it takes too long to test each interface pin and is error-prone
Solution Approach 1:
The system automatically traces current paths from interface pins to determine power domains and isolated elements without human intervention. The algorithm self-determines power node assignments and generates test models autonomously, eliminating the need for manual setting while maintaining accuracy.
Solution Approach 2:
The patent replaces manual engineering judgment with automated computer-based current path tracing algorithms. The system uses net-list analysis and graphical processing to automatically identify power domains and generate test models, substituting human expertise with computational methods.
2Reliability
If manual setting of isolation information is used, then engineers can verify circuit isolation, but at least two times of simulations are required and time consumption cannot be neutralized
Solution Approach 1:
The system performs preliminary current path tracing to automatically identify all isolated elements and power domains before actual simulation. By pre-determining isolation information through automated analysis of the net-list and current paths, the system eliminates the need for multiple iterative simulations to verify isolation settings.
3Measurement precision
If manual setting of power domain information is used, then engineers can ensure accurate power domain identification, but information about power domain or operating voltages may be missed
Solution Approach 1:
The system continuously traces current paths and feedbacks to verify power domain assignments. By analyzing current flow paths and comparing them against identified power domains, the system ensures complete and accurate power domain identification, preventing any information loss through systematic verification.
Data Source
AI summary
An integrated circuit test model is generated according to a circuit connection net-list, an isolation cell topology, and a pin voltage information spec file, so that the procedure of generating the integrated circuit test model can be time-saving, efficient, and fool-proof. Besides, while tracing a current path of a node of the circuit connection net-list, the generated integrated circuit test model can be more precise if certain limitations are added.