AgenticSizing: A Large Language Model-based Multi-Agent Framework for Analog Circuit Sizing

2026-09-22

AI Summary

本文提出一种基于大型语言模型的多代理框架，通过分析电路拓扑、分解网表和提取设计知识来解决复杂模拟电路尺寸调整问题。

Abstract

Analog circuit sizing remains a challenging and time-consuming task due to the large design space, strong performance trade-offs, and increasing circuit complexity in scaled technologies. Although recent large language model (LLM)-based methods show promise in improving sample efficiency and interpretability, existing approaches often lack explicit circuit-topology understanding and are mainly evaluated on relatively simple analog building blocks. This paper presents a multi-agent LLM-based framework for complex analog circuit sizing. The proposed framework first analyzes the circuit topology and decomposes the netlist into functional blocks and substructures. It also extracts lightweight design knowledge for reuse. Based on the extracted topology and knowledge, a planner coordinates multiple role-specialized sizing agents to update design variables and achieve global performance specifications. This workflow mimics the collaborative process of an expert analog design team and provides a structured, interpretable, and simulation-driven optimization procedure. The framework was validated on eight circuits, with the largest design containing up to 55 transistors and 60 sizing variables. Notably, for the LDO benchmark, the proposed method achieved a 60\% success rate with an average of 83 iterations, where classical optimizers failed to find feasible solutions. Further, ablation studies demonstrate that topology understanding, design-knowledge infusion, and agent specialization provide complementary benefits. The source code is available to support reproducibility.

Problem

• Analog Circuit Sizing
• Large Design Space
• Performance Trade-offs
• Circuit Complexity

Innovation

• multi-agent framework
• circuit topology understanding
• design-knowledge infusion
• role-specialized agents