ngspice

Name: ngspice
Author: Arcadia-1

116stars22forks

How to install ngspice?

arcadia-1/gmoverid-skill/ngspice

$npx -y skills add Arcadia-1/gmoverid-skill --skill ngspice

Installs into the current project.

Summary

ngspice simulation tutorial and template skill. Provides nine standard simulation examples: (1) Transient — RC charging voltage and current; (2) DC — NMOS Id-Vds family curves; (3) AC — RC low-pass filter frequency response; (4) Noise — RC filter output noise spectral density and

Files · 1

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SKILL.md

1	# ngspice Simulation Skill
2
3	> Important — do not modify skill files during normal use.
4	> All new scripts, netlists, simulation outputs, and plots should go into the
5	> user's project working directory (outside `.claude/`). Do not modify
6	> the skill's `assets/` folder or `SKILL.md`. Only edit skill-internal files
7	> when the user explicitly asks to improve or extend the skill itself.
8
9	---
10
11	## Prerequisites & Installation
12
13	Dependencies: system-installed `ngspice`, Python 3 with `numpy ≥ 1.20`, `matplotlib ≥ 3.3`, `scipy ≥ 1.7` (NumPy 1.x and 2.x both supported).
14
15	If `ngspice` is not found when a script starts, `check_ngspice()` will print a brief
16	error and exit. Full platform-specific install instructions — including a portable
17	Windows install that requires no PATH change, Chinese-network pip mirror fallbacks,
18	and `python-dateutil`/`six` troubleshooting — are in:
19
20	```
21	references/installation.md
22	```
23
24	---
25
26	```
27	assets/
28	├── ngspice_common.py — shared utilities: path constants, runner, parsers, template renderer
29	├── models/
30	│ ├── ptm180.lib — PTM 180nm BSIM3v3
31	│ ├── ptm45hp.lib — PTM 45nm HP BSIM4
32	│ └── ptm22hp.lib — PTM 22nm HP BSIM4
33	├── netlist/
34	│ ├── tran_rc_charging.cir.tmpl — Transient: RC charging voltage and current
35	│ ├── dc_nmos_iv.cir.tmpl — DC: NMOS Id-Vds family curves
36	│ ├── ac_rc_filter.cir.tmpl — AC: RC low-pass frequency response
37	│ ├── noise_rc_filter.cir.tmpl — Noise: RC output noise spectral density
38	│ ├── tran_sample_hold_nmos.cir.tmpl — Transient: 180nm NMOS sample-and-hold
39	│ ├── tran_sample_hold_ideal.cir.tmpl — Transient: ideal switch sample-and-hold
40	│ ├── tran_ktc_noise.cir.tmpl — Transient: kT/C noise time-domain statistics
41	│ ├── dc_current_mirror.cir.tmpl — DC: NMOS current mirror
42	│ ├── ac_cs_amp.cir.tmpl — AC: common-source amplifier frequency response
43	│ └── dc_tgate_ron.cir.tmpl — DC: transmission gate on-resistance
44	├── simulate_tran_rc_charging.py — RC charging simulation engine
45	├── plot_tran_rc_charging.py — RC charging plotting
46	├── run_tran_rc_charging.py — RC charging entry point
47	├── simulate_dc_nmos_iv.py — DC family-curve simulation engine
48	├── plot_dc_nmos_iv.py — DC family-curve plotting
49	├── run_dc_nmos_iv.py — DC family-curve entry point
50	├── simulate_ac_rc_filter.py — AC + noise simulation engine
51	├── plot_ac_rc_filter.py — AC + noise plotting
52	├── run_ac_rc_filter.py — AC + noise entry point
53	├── simulate_tran_sample_hold.py — sample-and-hold simulation engine
54	├── plot_tran_sample_hold.py — sample-and-hold plotting
55	├── run_tran_sample_hold.py — sample-and-hold entry point
56	├── simulate_tran_ktc_noise.py — kT/C noise simulation engine
57	├── plot_tran_ktc_noise.py — kT/C noise plotting
58	├── run_tran_ktc_noise.py — kT/C noise entry point
59	├── simulate_dc_current_mirror.py — current mirror simulation engine
60	├── plot_dc_current_mirror.py — current mirror plotting
61	├── run_dc_current_mirror.py — current mirror entry point
62	├── simulate_ac_cs_amp.py — common-source amplifier simulation engine
63	├── plot_ac_cs_amp.py — common-source amplifier plotting
64	├── run_ac_cs_amp.py — common-source amplifier entry point
65	├── simulate_dc_tgate_ron.py — transmission gate Ron simulation engine
66	├── plot_dc_tgate_ron.py — transmission gate Ron plotting
67	├── run_dc_tgate_ron.py — transmission gate Ron entry point
68	├── logs/ — simulation logs (auto-created)
69	└── plots/ — output figures (auto-created)
70	```
71
72	Naming convention: netlist templates are prefixed by simulation type (`dc_`, `ac_`, `noise_`, `tran_`); Python files follow the same naming (e.g. `run_dc_nmos_iv.py`).
73
74	---
75
76	## Deployment and Running
77
78	1. Copy all files under `assets/` to the project directory.
79	2. Run any entry-point script:
80
81	```bash
82	python run_tran_rc_charging.py # RC charging (simplest — good for verifying ngspice install)
83	python run_dc_nmos_iv.py # DC family curves
84	python run

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ngspice

116stars22forks

View on GitHub

How to install ngspice?

arcadia-1/gmoverid-skill/ngspice

$npx -y skills add Arcadia-1/gmoverid-skill --skill ngspice

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# ngspice Simulation Skill
2
3	> Important — do not modify skill files during normal use.
4	> All new scripts, netlists, simulation outputs, and plots should go into the
5	> user's project working directory (outside `.claude/`). Do not modify
6	> the skill's `assets/` folder or `SKILL.md`. Only edit skill-internal files
7	> when the user explicitly asks to improve or extend the skill itself.
8
9	---
10
11	## Prerequisites & Installation
12
13	Dependencies: system-installed `ngspice`, Python 3 with `numpy ≥ 1.20`, `matplotlib ≥ 3.3`, `scipy ≥ 1.7` (NumPy 1.x and 2.x both supported).
14
15	If `ngspice` is not found when a script starts, `check_ngspice()` will print a brief
16	error and exit. Full platform-specific install instructions — including a portable
17	Windows install that requires no PATH change, Chinese-network pip mirror fallbacks,
18	and `python-dateutil`/`six` troubleshooting — are in:
19
20	```
21	references/installation.md
22	```
23
24	---
25
26	```
27	assets/
28	├── ngspice_common.py — shared utilities: path constants, runner, parsers, template renderer
29	├── models/
30	│ ├── ptm180.lib — PTM 180nm BSIM3v3
31	│ ├── ptm45hp.lib — PTM 45nm HP BSIM4
32	│ └── ptm22hp.lib — PTM 22nm HP BSIM4
33	├── netlist/
34	│ ├── tran_rc_charging.cir.tmpl — Transient: RC charging voltage and current
35	│ ├── dc_nmos_iv.cir.tmpl — DC: NMOS Id-Vds family curves
36	│ ├── ac_rc_filter.cir.tmpl — AC: RC low-pass frequency response
37	│ ├── noise_rc_filter.cir.tmpl — Noise: RC output noise spectral density
38	│ ├── tran_sample_hold_nmos.cir.tmpl — Transient: 180nm NMOS sample-and-hold
39	│ ├── tran_sample_hold_ideal.cir.tmpl — Transient: ideal switch sample-and-hold
40	│ ├── tran_ktc_noise.cir.tmpl — Transient: kT/C noise time-domain statistics
41	│ ├── dc_current_mirror.cir.tmpl — DC: NMOS current mirror
42	│ ├── ac_cs_amp.cir.tmpl — AC: common-source amplifier frequency response
43	│ └── dc_tgate_ron.cir.tmpl — DC: transmission gate on-resistance
44	├── simulate_tran_rc_charging.py — RC charging simulation engine
45	├── plot_tran_rc_charging.py — RC charging plotting
46	├── run_tran_rc_charging.py — RC charging entry point
47	├── simulate_dc_nmos_iv.py — DC family-curve simulation engine
48	├── plot_dc_nmos_iv.py — DC family-curve plotting
49	├── run_dc_nmos_iv.py — DC family-curve entry point
50	├── simulate_ac_rc_filter.py — AC + noise simulation engine
51	├── plot_ac_rc_filter.py — AC + noise plotting
52	├── run_ac_rc_filter.py — AC + noise entry point
53	├── simulate_tran_sample_hold.py — sample-and-hold simulation engine
54	├── plot_tran_sample_hold.py — sample-and-hold plotting
55	├── run_tran_sample_hold.py — sample-and-hold entry point
56	├── simulate_tran_ktc_noise.py — kT/C noise simulation engine
57	├── plot_tran_ktc_noise.py — kT/C noise plotting
58	├── run_tran_ktc_noise.py — kT/C noise entry point
59	├── simulate_dc_current_mirror.py — current mirror simulation engine
60	├── plot_dc_current_mirror.py — current mirror plotting
61	├── run_dc_current_mirror.py — current mirror entry point
62	├── simulate_ac_cs_amp.py — common-source amplifier simulation engine
63	├── plot_ac_cs_amp.py — common-source amplifier plotting
64	├── run_ac_cs_amp.py — common-source amplifier entry point
65	├── simulate_dc_tgate_ron.py — transmission gate Ron simulation engine
66	├── plot_dc_tgate_ron.py — transmission gate Ron plotting
67	├── run_dc_tgate_ron.py — transmission gate Ron entry point
68	├── logs/ — simulation logs (auto-created)
69	└── plots/ — output figures (auto-created)
70	```
71
72	Naming convention: netlist templates are prefixed by simulation type (`dc_`, `ac_`, `noise_`, `tran_`); Python files follow the same naming (e.g. `run_dc_nmos_iv.py`).
73
74	---
75
76	## Deployment and Running
77
78	1. Copy all files under `assets/` to the project directory.
79	2. Run any entry-point script:
80
81	```bash
82	python run_tran_rc_charging.py # RC charging (simplest — good for verifying ngspice install)
83	python run_dc_nmos_iv.py # DC family curves
84	python run

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