Spice_Wizard

Spice Wizard is a simulator-in-the-loop assistant for analog circuit design. It retrieves a known-working SPICE template, uses an open-weight LLM on AMD MI300X with PyTorch and ROCm to adjust permitted component values, and verifies every candidate in real LTspice. Waveforms are parsed to measure gain, bandwidth, phase, and settling against the requested tolerance; failures feed a constrained retry loop. For users without suitable template netlists, Spice Wizard includes a fine-tuned fallback model, also fine-tuned on AMD hardware, to generate a starting circuit. The agent accepts natural-language chat queries in a smooth desktop GUI and returns a netlist plus numeric verification report. Our cloud API path is currently blocked by the event firewall, so the demo shows manual MI300X inference and the working GUI flow locally. Passing results are logged as verified training pairs, supporting a self-improving dataset.