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# SAME Analog Modular Ecosystem Specification
[](LICENSE.md)
[](LICENSE.md)
[](LICENSE.md)
[](https://typst.app/)
The **SAME Analog Modular Ecosystem** is an open-hardware specification and
architecture for general-purpose analog computing. Designed for technological
sovereignty, 50-year serviceability, and high-precision scientific computation,
SAME bridges classical analog architectures with modern low-noise components and
rigorous topological error compensation.
## Key Features
* **Multi-Tiered Precision:** Defines three distinct operational tiers sharing a
unified power and backplane infrastructure:
* **Metrologic Tier:** $0.001\%$ (10 ppm) precision, $90\text{ dB}$ SNR,
$<0.014\text{ ppm/h}$ drift.
* **Industrial Tier:** $0.01\%$ (100 ppm) precision, $80\text{ dB}$ SNR,
$<0.6\text{ ppm/h}$ drift.
* **Educational Tier:** $0.1\%$ (1000 ppm) precision, $70\text{ dB}$ SNR,
$<60\text{ ppm/h}$ drift.
* **Robust Mechanical Infrastructure:** Individual $1.2\text{ mm}$ DC01 steel
shielding cassettes ($4\text{U}$ height, $38.0\text{ mm}$ width) housed in a
standard $19\text{"}$ rack enclosure with integrated convective ventilation
and EMI perimeter masking.
* **Unified Power & Clocking:** DB-25 backplane distributing $\pm15.00\text{ V}$
analog, $\pm5.0\text{ V}$ digital, $\pm10.0000\text{ V}$ Kelvin-sensed
reference rails, a $90^\circ$ phase-stagger rail, and a system-wide
$10\text{ MHz}$ OCXO Master Oscillator for Pulse-Width Amplitude Modulation
(PWAM) compute cores.
* **Executable Specification:** Built natively in Typst, featuring compile-time
mathematical assertions (`#assert-aeq`) embedded directly alongside typeset
equations to guarantee zero-copy consistency throughout the text.
## Repository Structure
```text
.
├── charts/ # Vector charts built with CeTZ-plot
├── diagrams/ # Vector technical drawings & CAD layouts (CeTZ / Zap)
├── lib/ # Executable Typst helper functions & test harness
│ ├── apply-prefix.typ # SI prefix mathematical helper
│ ├── assert-aeq.typ # Float tolerance assertion library
│ └── unify.typ # Curried unit formatting wrappers
├── listings/ # Code examples and calibration log templates
├── tables/ # Modular specification data tables
├── electrical-specifications.typ
├── mechanical-specifications.typ
├── module-design.typ # Theoretical error budgeting & compensation
├── introduction.typ
├── preamble.typ # Document entry point & main layout
└── LICENSE.md # Comprehensive tri-license legal breakdown
└── LICENSES # Actual licences text
```
## Compiling the Specification
### Prerequisites
- [Typst CLI](https://github.com/typst/typst) (v0.15.1 or newer)
- Fonts: standard system serif ans sans-serif fonts
### Building the PDF
To compile the entire specification from source:
```bash
typst compile preamble.typ specification.pdf
```
To enable live-recompilation during drafting:
```bash
typst watch preample.typ
```
**Note:** During compilation, Typst executes all internal assertions metrology
checks. If any mathematical derivation or parameter in the text strays from
defined engineering tolerances, compilation will halt with an assertion error.
## Licensing
This repository uses a multi-scope licensing model to ensure appropriate legal
coverage across documentation, physical hardware, and executable code:
* **Documentation & Text:** [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)
* **Hardware & Mechanical Designs:** [CERN-OHL-S-2.0+](https://www.google.com/search?q=https://ohwr.org/cernohl)
* **Code, Libraries & Assertions:** [GPL-3.0-or-later](https://www.google.com/search?q=https://www.gnu.org/licenses/gpl-3.0.html)
See [LICENSE.md](LICENSE.md) or full license texts.
## Author & Contact
**Denis Chevalier**
Email: [perso@denischevalier.fr](mailto:perso@denischevalier.fr)
Copyright © 2026 Denis Chevalier
|
