HAADIC

Highly-Automated Analog Designer for Integrated Circuits

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

Dimensions in the layout can be changed by editing the dim variable. Post-simulation computation can be done by editing the evaluate function.

Design Flow

The following flow is run using the information given in a design.py python file (see tutorial). The flow has 2 entry points :

• flow.run_from_dim : Only requires a dim variables which defines the value of each parameters of the layout function.
• flow.run_from_target : Requires both a targetand an local_model function. The local_model is an implementation of the design methodology which output the layout parameters value required to obtains the target.

For batch execution, the method run_from_sweep can be used.

flowchart TD
    s1{Start #2}
    s2{Start #1}
    app["Physical Model
(design:local_model)"]
    pl["Parametric Layout
(klayout + design:layout)"]
    be_ext["RC extraction
(steps.extraction + Magic-VLSI)"]
    sim["Spice simulation
(steps.spice_sim + NGSpice)"]
    spec["Performances Evaluation
(design:post_processors)"]

    s1 -- "design:specifications" --> app
    s2 -- "design:dimensions" --> pl
    app --"dimensions (step.Dim)" --> pl
    pl --"geometries (.gds)" --> be_ext
    be_ext --"netlist (.cir)" --> sim
    sim --"raw simulation (step.SimRes)" --> spec
    spec --"performances (.csv)" --> st{stop}

When finished, a .gds file is available for further design and a .csv file with the performances of the design.

PDKs configuration

A techno.json file can be created in the working dir or the haadic root with the following structure:

{
"techno_name": {
  "base_dir": "path to the pdk directory root",
  "layermap": "path to the layermap (relative to the base_dir)",
  "techlef": "path to the tlef file",
  "magic_rc": "path to the configuration file of magic",
  "lib_spice": "path to the spice model library",
  "section": "name of the section to import in the spice library typical",
  "source_url": "url to be use for download (set to "ciel" for ciel installation)",
  "version": "version id (only required if source_url is set to "ciel")"
}
}

A techno.json file with three open source PDK and a mock PDK are already supplied.

For developers

Install haadic with optional group dev :

uv install git+https://github.com/Patarimi/haadic --with dev

Then run pytest in a shell

uvx run poe test