Designing using pygmid tool
===========================

.. _pygmid_configuration_lbl:

Pygmid installation and configuration
-------------------------------------
pygmid is a Python 3 version of the gm/ID starter kit by Prof. Boris Murmann of Stanford University. 
The package also offers some scripts from the Paul Jesper's and Boris Murmann's book entitled:
*"Systematic Design of Analog CMOS Circuits: Using Pre-Computed Lookup Tables"*
To be used with IHP-Open-PDK it latest release hosted on 
`github <https://github.com/dreoilin/pygmid>`_.

After successful cloning of the repository you can execute:

.. code-block:: shell

    cd pygmid
    python3 install .


Device characterization using pygmid
------------------------------------

The device characterization is done once per technology according to the configuration. 
The example configuration file is stored under the following location ``tests/pygmid/sweep/IHP130nm.cfg`` 
in the ``ngspice`` branch. In order to characterize the mosfet devices run the following command:


.. code-block:: shell

    python3 -m pygmid --mode sweep --config ~./tests/pygmid/sweep/IHP130nm.cfg

.. tip:: 
   Since the pygmid tool calls ngspice in the ``cwd`` the psp103_nqs.osdi file has to be present in the same directory. 

Basic usage of pygmid
---------------------