HADES

High-frequency Analog DESigner

This project is a prototype. Its goal is to create a technological and software-agnostic design flow, from device sizing to layout and implementation.

How to get started

This application needs nix and python3. For windows, please install NixOS as shown here.

Installation using pipx is recommended.

pipx install git+https://github.com/Patarimi/hades

Design flow

Starting from the specifications written in a design.yml or a python file, the following flow is run see.

flowchart TD
    start -- "specifications (.yml)" --> app["Physical Model\n(hades.devices)"]
    app --dimensions --> pl["Parametric Layout\n(gdstk + hades.layouts)"]
    pl --"geometries (.gdsII)" --> be_sim["RC extraction up to Mx\n(Magic-VLSI)"]
    pl --"geometries (.gdsII)" --> fe_sim["3D simulation from Mx\n(OpenEMS)"]
    fe_sim -- "touchstone (.sNp)" --> ext["Spice simulation and spec. extraction.\n(NGSpice + Scikit-RF)"]
    be_sim --"netlist (.cir)" --> ext
    ext --"Performances (.yml)" --> atSpec{"Perf = Spec ?"}
    atSpec --> |Yes| stop
    atSpec --> |No| cal["Model Calibrator\n(hades.calibrator)"]
    cal --"Locally Optimized Parameters" --> app

Loading

When finished, a .gds file is available for further design.

Simulators and PDKs configuration

The simulator can be configured using:

hades config <simulator_name>

This command will write a simulator.yml file in the installation directory of hades. The structure is the following:

simulator_name:
  base_dir: path to root directory
  name: name of the binary file
  option:
    - list of option to configure the run

Similarly, a techno.yml file can be created at hades root with the following structure:

techno_name:
  base_dir: path to the pdk directory root
  layer_map: path to the layermap (relative to the base_dir)
  process: path to the process file (-proc option in emx)
  techlef: path to the tlef file

A techno.yml file with three open source PDK is already supplied.

Working directory

Configuration file design.yml. This file can be generated using:

hades template

It must contain at least:

name: name of the output file
design:
  name: name of the component in the library
  specifications:
    key: pair of specification
techno:

It is also possible to create custom devices using a python file. To be written.

Tests configuration

The layout testing needs klayout to be installed and the program strmxor to be accessible. Install hades with optional group dev :

poetry install git+https://github.com/Patarimi/hades --with dev

Then run pytest in a shell

poetry run pytest