sky130-pdk

Name: sky130-pdk
Author: Arcadia-1

116stars22forks

How to install sky130-pdk?

arcadia-1/gmoverid-skill/sky130-pdk

$npx -y skills add Arcadia-1/gmoverid-skill --skill sky130-pdk

Installs into the current project.

Summary

Sky130A open PDK workflow for ngspice-based analog simulation. Use when an agent needs to install or locate Sky130A via Volare/open_pdks, run process-corner PVT simulations, run process Monte Carlo or mismatch-aware smoke tests, instantiate sky130_fd_pr devices, or validate Sky13

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SKILL.md

1	# Sky130A PDK Skill
2
3	Use this skill for Sky130A ngspice work with the open-source SkyWater/open_pdks PDK. It covers PDK installation, model-path discovery, process corners, process Monte Carlo, and small smoke examples.
4
5	Do not commit the PDK data itself. The `sky130A/` runtime tree is installed outside the project, usually through Volare.
6
7	## Quick Start
8
9	Install the PDK with Volare:
10
11	```bash
12	python3 -m pip install --user volare
13	export PATH="$HOME/.local/bin:$PATH"
14	volare enable --pdk sky130 c6d73a35f524070e85faff4a6a9eef49553ebc2b
15	```
16
17	Run smoke examples from the skill directory:
18
19	```bash
20	cd sky130-pdk
21	python3 assets/run_sky130_mos_iv_pvt_mc.py
22	python3 assets/run_sky130_ringosc_pvt_mc.py
23	python3 assets/run_sky130_five_transistor_ota_pvt_mc.py
24	```
25
26	Each script also accepts:
27
28	```bash
29	--pdk-root <path-containing-sky130A-or-sky130A-itself>
30	--workdir <output-directory>
31	--mc-runs <N>
32	--jobs <parallel-ngspice-jobs>
33	```
34
35	Run direct ngspice examples:
36
37	```bash
38	export PDK_ROOT="$(volare path)/volare/sky130/versions/$(volare output --pdk sky130)"
39	cd examples/ota-5t
40	ngspice -b tb.spi
41	```
42
43	## Model Entry
44
45	Prefer the continuous model library for PVT/Monte Carlo smoke:
46
47	```text
48	sky130A/libs.tech/combined/continuous/sky130.lib.spice
49	```
50
51	Use `.lib` sections:
52
53	```spice
54	.lib ".../sky130.lib.spice" tt
55	.lib ".../sky130.lib.spice" ff
56	.lib ".../sky130.lib.spice" ss
57	.lib ".../sky130.lib.spice" fs
58	.lib ".../sky130.lib.spice" sf
59	.lib ".../sky130.lib.spice" mc
60	```
61
62	Common primitive devices:
63
64	```spice
65	Xn d g s b sky130_fd_pr__nfet_01v8 l=0.15 w=1.0 nf=1
66	Xp d g s b sky130_fd_pr__pfet_01v8 l=0.15 w=2.0 nf=1
67	```
68
69	The continuous Sky130 models use micron-valued `l` and `w` parameters in these examples.
70
71	## Included Smoke Examples
72
73	- `run_sky130_mos_iv_pvt_mc.py`: NMOS Id-Vgs smoke across `tt/ff/ss/fs/sf` plus MC current spread.
74	- `run_sky130_ringosc_pvt_mc.py`: three-stage CMOS ring oscillator PVT/MC frequency smoke.
75	- `run_sky130_five_transistor_ota_pvt_mc.py`: five-transistor OTA low-frequency AC gain PVT/MC smoke.
76	- `examples/`: three circuit folders, each with `circuit.scs/.spi` and a standalone `tb.scs/.spi`.
77
78	The ring oscillator and OTA examples belong in this skill because they are Sky130A PDK smoke/application examples. They are not generic ngspice tutorials and should not be placed in the PTM transistor-model library.
79
80	## Sky130 SCS To ngspice Sky130
81
82	ngspice does not parse full Spectre `.scs` syntax. This skill includes a small Sky130-oriented converter for user circuit netlists:
83
84	Use `--fragment` when converting a user circuit/subcircuit file that will be
85	included by another testbench. Fragment mode suppresses the auto-inserted model
86	library, control block, and final `.end`:
87
88	```bash
89	python3 assets/scs_sky130_to_ngspice_sky130.py examples/ring_oscillator/circuit.scs \
90	--fragment -o /tmp/ring_oscillator.spi
91	```
92
93	The converter intentionally supports only a practical subset: `parameters`, `include ... section=`, local `.scs` includes, `options`, `subckt`/`ends`, Sky130 subcircuit instances, `vsource`/`isource`, `vcvs`, R/C/L passives, `save`, `ic`, `measure`/`meas`, simple `tran`/`dc`/`ac`/`noise` analyses, and basic ngspice `.control` pass-through. It does not translate the Sky130 PDK model files themselves; output netlists reference the installed ngspice model library.
94
95	Standalone examples are in `examples/`:
96
97	- `ring_oscillator/circuit.scs` plus `ring_oscillator/tb.scs`.
98	- `ota-5t/circuit.scs` plus `ota-5t/tb.scs`.
99	- `amp-2s-miller/circuit.scs` plus `amp-2s-miller/tb.scs`.
100
101	Convert a standalone Spectre-style testbench directly:
102
103	```bash
104	python3 assets/scs_sky130_to_ngspice_sky130.py examples/ota-5t/tb.scs -o /tmp/ota-5t_tb.spi
105	ngspice -b /tmp/ota-5t_tb.spi
106	```
107
108	## References
109
110	Read these only when needed:
111
112	- `references/installation.md`: installing Volare/Sky130A and locating `PDK_ROOT`.
113	- `references/ngspice-corners.md`: ngspice `.lib` sections, PVT/MC usage, and troubleshooting.
114	- `references/five-transistor-ota-testbenches.md`: guidance for extending the included OTA smoke bench.

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sky130-pdk

116stars22forks

View on GitHub

How to install sky130-pdk?

arcadia-1/gmoverid-skill/sky130-pdk

$npx -y skills add Arcadia-1/gmoverid-skill --skill sky130-pdk

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# Sky130A PDK Skill
2
3	Use this skill for Sky130A ngspice work with the open-source SkyWater/open_pdks PDK. It covers PDK installation, model-path discovery, process corners, process Monte Carlo, and small smoke examples.
4
5	Do not commit the PDK data itself. The `sky130A/` runtime tree is installed outside the project, usually through Volare.
6
7	## Quick Start
8
9	Install the PDK with Volare:
10
11	```bash
12	python3 -m pip install --user volare
13	export PATH="$HOME/.local/bin:$PATH"
14	volare enable --pdk sky130 c6d73a35f524070e85faff4a6a9eef49553ebc2b
15	```
16
17	Run smoke examples from the skill directory:
18
19	```bash
20	cd sky130-pdk
21	python3 assets/run_sky130_mos_iv_pvt_mc.py
22	python3 assets/run_sky130_ringosc_pvt_mc.py
23	python3 assets/run_sky130_five_transistor_ota_pvt_mc.py
24	```
25
26	Each script also accepts:
27
28	```bash
29	--pdk-root <path-containing-sky130A-or-sky130A-itself>
30	--workdir <output-directory>
31	--mc-runs <N>
32	--jobs <parallel-ngspice-jobs>
33	```
34
35	Run direct ngspice examples:
36
37	```bash
38	export PDK_ROOT="$(volare path)/volare/sky130/versions/$(volare output --pdk sky130)"
39	cd examples/ota-5t
40	ngspice -b tb.spi
41	```
42
43	## Model Entry
44
45	Prefer the continuous model library for PVT/Monte Carlo smoke:
46
47	```text
48	sky130A/libs.tech/combined/continuous/sky130.lib.spice
49	```
50
51	Use `.lib` sections:
52
53	```spice
54	.lib ".../sky130.lib.spice" tt
55	.lib ".../sky130.lib.spice" ff
56	.lib ".../sky130.lib.spice" ss
57	.lib ".../sky130.lib.spice" fs
58	.lib ".../sky130.lib.spice" sf
59	.lib ".../sky130.lib.spice" mc
60	```
61
62	Common primitive devices:
63
64	```spice
65	Xn d g s b sky130_fd_pr__nfet_01v8 l=0.15 w=1.0 nf=1
66	Xp d g s b sky130_fd_pr__pfet_01v8 l=0.15 w=2.0 nf=1
67	```
68
69	The continuous Sky130 models use micron-valued `l` and `w` parameters in these examples.
70
71	## Included Smoke Examples
72
73	- `run_sky130_mos_iv_pvt_mc.py`: NMOS Id-Vgs smoke across `tt/ff/ss/fs/sf` plus MC current spread.
74	- `run_sky130_ringosc_pvt_mc.py`: three-stage CMOS ring oscillator PVT/MC frequency smoke.
75	- `run_sky130_five_transistor_ota_pvt_mc.py`: five-transistor OTA low-frequency AC gain PVT/MC smoke.
76	- `examples/`: three circuit folders, each with `circuit.scs/.spi` and a standalone `tb.scs/.spi`.
77
78	The ring oscillator and OTA examples belong in this skill because they are Sky130A PDK smoke/application examples. They are not generic ngspice tutorials and should not be placed in the PTM transistor-model library.
79
80	## Sky130 SCS To ngspice Sky130
81
82	ngspice does not parse full Spectre `.scs` syntax. This skill includes a small Sky130-oriented converter for user circuit netlists:
83
84	Use `--fragment` when converting a user circuit/subcircuit file that will be
85	included by another testbench. Fragment mode suppresses the auto-inserted model
86	library, control block, and final `.end`:
87
88	```bash
89	python3 assets/scs_sky130_to_ngspice_sky130.py examples/ring_oscillator/circuit.scs \
90	--fragment -o /tmp/ring_oscillator.spi
91	```
92
93	The converter intentionally supports only a practical subset: `parameters`, `include ... section=`, local `.scs` includes, `options`, `subckt`/`ends`, Sky130 subcircuit instances, `vsource`/`isource`, `vcvs`, R/C/L passives, `save`, `ic`, `measure`/`meas`, simple `tran`/`dc`/`ac`/`noise` analyses, and basic ngspice `.control` pass-through. It does not translate the Sky130 PDK model files themselves; output netlists reference the installed ngspice model library.
94
95	Standalone examples are in `examples/`:
96
97	- `ring_oscillator/circuit.scs` plus `ring_oscillator/tb.scs`.
98	- `ota-5t/circuit.scs` plus `ota-5t/tb.scs`.
99	- `amp-2s-miller/circuit.scs` plus `amp-2s-miller/tb.scs`.
100
101	Convert a standalone Spectre-style testbench directly:
102
103	```bash
104	python3 assets/scs_sky130_to_ngspice_sky130.py examples/ota-5t/tb.scs -o /tmp/ota-5t_tb.spi
105	ngspice -b /tmp/ota-5t_tb.spi
106	```
107
108	## References
109
110	Read these only when needed:
111
112	- `references/installation.md`: installing Volare/Sky130A and locating `PDK_ROOT`.
113	- `references/ngspice-corners.md`: ngspice `.lib` sections, PVT/MC usage, and troubleshooting.
114	- `references/five-transistor-ota-testbenches.md`: guidance for extending the included OTA smoke bench.

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