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About this paper
Simon Nau, Jan Krummenauer, André Zimmermann
The paper evaluates an LLM workflow for adapting PCB switched-mode power-supply circuits to engineering requirements. It combines datasheet retrieval, simulation feedback from SPICE, and iterative netlist editing. On 269 benchmark tasks, o3 with retrieval and feedback solved 90.7%, versus 25.4% for o3 alone. The result used idealized components, and topology-adaptation solve rates fell to about 50% for complex LTC7802 circuits.
Key insights
- SPICE simulation feedback is a critical factor, enabling LLMs to verify design choices, correct errors, and iteratively refine solutions, leading to substantial performance improvements.
- The reasoning capabilities of LLMs are paramount, allowing models to more effectively utilize external tools like RAG and SPICE feedback, outperforming non-reasoning models significantly.
- While adept at parameter tuning, LLMs face limitations in topology adaptation for complex circuits due to the tabular and non-semantic nature of SPICE netlist syntax.
Summary by alphaXiv.
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