kicad-pdk-libs's Introduction

KiCad PDK Library

This is a KiCad symbol library that contains the collection of cells from the sky130 and gf180mcu PDKs for use in schematic capture and SPICE simulation.

Important

The in-repo libraries are exported with SPICE libraries as a link, not embedded. To ensure spice works, you need PDK_ROOT set in your KiCad paths for that to work.

To get started see the installation instructions and then once you're done there you can follow the introduction to get your first SPICE sim done!

Documentation

The documentation for usage and installation can be found here.

License

The pdk2kicad script is licensed under the BSD-3-Clause, the full text of which can be found in the LICENSE.script file.

The library symbols generated from the pdk2kicad script are licensed under the Apache-2.0 as they are extracted from the open_pdk builds, which are also Apache 2.0 licensed. The full text of which can be found in the LICENSE.data file.

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kicad-pdk-libs's Issues

N/P FET Symbols / models

Currently as it stands there are no proper NFET/PFET symbols for gate-level schematic capture and simulation.

This might need to be done as a manual crafted supplemental library to the PDK, or more intelligent SPICE extraction combined with symbol generation.

Add Resistor/Capacitor/Inductor/Diode SPICE symbols/models

Currently only the FETs have been added, to make it more useable, especially for analog design we need to also add/link resistor, capacitor, inductor, and diode models from the PDK where available.

Alternate Symbol Bodies

Currently all of the symbols are generated as boxes, this was to make things easier when generating the symbols due to lots of them having unknown numbers of pins.

However, for readability, it would be useful to have an alternate body style that more closely matches the function of the cell, like what xschem has.

Implementing this would be easy enough, it would involve altering Cell to take a symbol body and having pins being named appropriately in the symbol body template. The downside is that quite a few variants of the symbol templates would need to be made.

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