Inspector: Analog Circuit Layouts

This repository provides the SKY130 GDSII layouts associated with Inspector: Conversational and Lightweight Analyzer of Analog Circuit Layouts Using LLM and CNNs. The paper studies visual layout analysis using CNNs and a conversational language model. The Inspector code repository contains the training and evaluation scripts.

Browse the dataset

The Dataset Viewer shows one row for each GDS file in Inspector.zip. The release archive contains 30,031 distinct layouts. Its directory names identify the layout category and circuit type; there are no predefined train, validation, or test splits in this release.

Category	Circuit type	Layouts
Single devices	Capacitor (single_cap)	4,997
Single devices	NMOS (single_nmos)	5,000
Single devices	PMOS (single_pmos)	5,000
Single devices	Resistor (single_res)	5,000
Base circuits	Ahuja OTA (ahuja_ota)	995
Base circuits	Gate driver (gate_driver)	1,000
Base circuits	High-pass filter (hpf)	962
Base circuits	Low-dropout regulator (ldo)	989
Base circuits	Low-pass filter (lpf)	971
Base circuits	Miller OTA (miller_ota)	977
Mixed circuits	Mixed topologies	4,140
Total		30,031

The paper's Table I reports 30,034 layouts, including 5,000 capacitors. The supplied Inspector.zip contains 4,997 capacitors; all other circuit-type counts match the table. The Viewer counts the files actually present in the archive.

Viewer column	Meaning
id	Unique archive path without the .gds suffix.
category	single_devices, base_circuits, or mixed_circuits.
circuit_type	Circuit or device family; mixed for mixed circuits.
sample_id	Sample directory name from the archive.
gds_member	Exact path of the GDS file inside Inspector.zip.
gds_size_bytes	Uncompressed size of that GDS file.

from datasets import load_dataset

layouts = load_dataset("hardware-fab/Inspector", "default", split="full")
print(layouts[0])

Repository files

Path	Contents
Inspector.zip	The 30,031 original GDS files, organized by category and circuit type.
viewer/layouts.parquet	Browsable index used by the Dataset Viewer.
generate_labels.py	Generates a rendered PNG and device annotation JSON from a hierarchical base-circuit GDS file.

The archive contains GDS files only. The paper also describes derived PNG annotations and question-answer data used in its experiments; those derived files are not included in this release archive. The Viewer indexes the GDS files but does not render their geometry.

Inside Inspector.zip, base and single-device layouts use <category>/<circuit_type>/<sample_id>/<sample_id>.gds. Mixed layouts use mixed_circuits/<sample_id>/<sample_id>.gds.

Download a layout

from zipfile import ZipFile
from datasets import load_dataset
from huggingface_hub import hf_hub_download

row = load_dataset("hardware-fab/Inspector", "default", split="full")[0]
archive = hf_hub_download(
    repo_id="hardware-fab/Inspector",
    repo_type="dataset",
    filename="Inspector.zip",
)
with ZipFile(archive) as z:
    z.extract(row["gds_member"], path=".")

Generate labels for base circuits

generate_labels.py operates on the hierarchical GDS files under base_circuits/. It requires Python 3.10 or newer, gdstk, Pillow, and the SKY130 KLayout layer-properties file. After extracting the ZIP, run it from the directory containing base_circuits/:

python -m pip install gdstk Pillow
python generate_labels.py \
  base_circuits/hpf/hpf_675/hpf_675.gds \
  --layer-properties /path/to/sky130A.lyp

The script writes a PNG rendering and a JSON annotation beside the input GDS. The flattened mixed and single-device layouts do not retain the named device references needed for this label-generation method.