Analog SPICE Circuits on SKY130
Copyright 2026 Philip Pilgerstorfer

This dataset is released under the Apache License, Version 2.0 (see LICENSE).

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This dataset contains Derivative Works of three upstream corpora. Their
original licences are reproduced verbatim in the LICENSES/ directory and MUST
be included in any downstream redistribution of this dataset.
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1. Open Circuit Benchmark (OCB) — Ckt-Bench-101 + Ckt-Bench-301
   Upstream: https://github.com/zehao-dong/CktGNN
   Paper:    Z. Dong, W. Cao, M. Zhang, D. Tao, Y. Chen, X. Zhang.
             "CktGNN: Circuit Graph Neural Network for Electronic Design
             Automation." ICLR 2023.
   Licence:  MIT (see LICENSES/LICENSE-OCB)
   Use in this dataset:
     The 60,000 rows where `source_dataset == "ocb"` are derived from OCB's
     behavioural opamp graphs. Each graph was remapped from its upstream
     (gm, R, C) sub-circuit representation to a transistor-level SKY130
     netlist via an equivalent-subcircuit library, then simulated in ngspice.
     Circuit IDs preserve the upstream sub-benchmark partition:
        ocb_sky130_101_*   — 10,000 graphs (Ckt-Bench-101, diversity sample)
        ocb_sky130_301_*   — 50,000 graphs (Ckt-Bench-301, BO-curated)


2. AnalogToBi
   Upstream: https://github.com/Seungmin0825/AnalogToBi
   Paper:    Seungmin Lee et al. "AnalogToBi: Device-Level Analog Circuit
             Topology Generation via Bipartite Graph and Grammar-Guided
             Decoding."
   Licence:  MIT (declared in upstream README; see LICENSES/LICENSE-AnalogToBi
             for the note on the missing upstream LICENSE file and the
             reproduced standard MIT text)
   Use in this dataset:
     The 67,736 converged + 2,177 failed rows where
     `source_dataset == "analogtobi"` are derived from AnalogToBi's 3,350
     textbook + paper analog-circuit topologies. This includes a 1× default-
     sizing baseline and a 20-point Latin-Hypercube sweep over W, L, Ibias,
     and CL applied by our simulation pipeline before ngspice runs. Upstream
     netlists ship in Cadence Spectre dialect; our pipeline converted them
     to ngspice dialect.


3. AnalogGym
   Upstream: https://github.com/CODA-Team/AnalogGym
   Paper:    CODA-Team. "AnalogGym: An Open and Practical Testing Suite for
             Analog Circuit Synthesis." ICCAD 2024.
             doi:10.1145/3676536.3697117
   Licence:  BSD 3-Clause (see LICENSES/LICENSE-AnalogGym)
   Use in this dataset:
     The 500 rows where `source_dataset == "analoggym"` are derived from
     AnalogGym's 22 ngspice-ready SKY130 topologies (16 amplifiers + 1 LDO
     + 4 voltage references + 1 charge pump), each expanded by a 20-point
     LHS sweep. The charge-pump sub-circuit is a structural homage of the
     SMIC 130 nm PLL charge pump from the AnalogGym repo — model-name
     tokens were remapped to SKY130 equivalents and layout-dependent
     parameters were stripped.
     Per the BSD 3-Clause no-endorsement clause: neither the names of
     AnalogGym, CODA-Team, nor any of their contributors may be used to
     endorse or promote products derived from this dataset without specific
     prior written permission.


Third-party tools and data referenced but NOT redistributed
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  - SkyWater SKY130 PDK (Apache 2.0) — https://github.com/google/skywater-pdk.
    The shipped netlists reference SKY130 `.lib` and `.model` names (e.g.
    `sky130_fd_pr__nfet_01v8`) but do not embed any PDK model files.
    Users wishing to re-simulate must install the PDK themselves (e.g.
    via https://github.com/efabless/volare).

  - ngspice — http://ngspice.sourceforge.net/. The simulator used to
    produce every row's metrics. Not redistributed.