analog-sizing SKILL.md skillA

analog-sizing from vibeic/vibe-ic is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add vibeic/vibe-ic/analog-sizing@git:20260831.fdcbf3a

Pins git:20260831.fdcbf3a in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
vibeic/vibe-ic
Path
vibe-ic-marketplace/plugins/vibe-ic/skills/analog-sizing/SKILL.md
Versions recorded
2
Latest version
git:20260831.fdcbf3a, committed Aug 31, 2026
First version recorded
Jun 13, 2026
Size
6,280 bytes
Repository stars
28
License
Apache-2.0

Size transistors in an analog circuit topology to meet performance specs (gain, bandwidth, noise, power). Use when the user says "size this amplifier", "analog sizing", "op-amp design", "bias point", "find W/L", or shares a schematic and a spec table.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Analog Sizing

Given an analog topology (schematic or netlist) and a performance spec (gain, UGB, phase margin, noise, power, area), propose transistor W/L sizes and bias currents that meet the spec. Acts as the LLM copilot layer over classical analog sizing tools and SPICE.

## When to use

Trigger when the user:
- Has a schematic (op-amp, LDO, bandgap, comparator, PLL CP) and needs sizes
- Wants to explore a design space before running SPICE sweeps
- Asks for gm/Id-based sizing intuition
- Needs a starting point for an optimizer

## Inputs to gather

1. Topology (schematic, netlist, or textual description)
2. Process and models (e.g., TSMC 180nm, 65nm, FinFET node)
3. Spec table: gain (dB), UGB (Hz), PM (°), noise, power budget, supply, load
4. Starting point or "greenfield"
5. Constraint: minimize power, minimize area, or balanced

## The process constants are MEASURED, not re-derived here (vibe-ic#1962)

Do **not** derive k', the threshold, the resistor sheet or the MiM density by
hand, and do not quote them from memory. They are a deterministic measurement
of the target PDK's own models, taken once and published with their provenance:

```bash
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add vibeic/vibe-ic/analog-sizing@sha256:3f20c229c71fa750

The line at the top of this page pins the label git:20260831.fdcbf3a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_axucafaznzrevgou.svg)](https://markdownregistry.com/a/art_axucafaznzrevgou)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Jun 13, 2026 and Aug 31, 2026, about one every 79 days.

versioncommittedcommitsizeaudit
git:20260831.fdcbf3a latest2026-08-31 fdcbf3a 6,280 BA view · diff
git:20260613.86cacb42026-06-13 86cacb4 3,697 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (6280 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

vibeic/vibe-ic · 28 stars · license Apache-2.0 · pushed 2026-10-31 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_axucafaznzrevgou
GET https://markdownregistry.com/api/v1/resolve?ref=vibeic/vibe-ic/analog-sizing
GET https://markdownregistry.com/api/v1/blob/3f20c229c71fa75029faadd6b1d1cacceca2fae14a3b05271c2e8595fe722334

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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