20V NMOS zero-VT FET
--------------------

Spice Model Information
~~~~~~~~~~~~~~~~~~~~~~~

-  Cell Name: :cell:`sky130_fd_pr__nfet_extenddrain`
-  Model Name: :model:`sky130_fd_pr__nfet_20v0_zvt`

Operating Voltages where SPICE models are valid, subject to SOA limitations:

-  :math:`V_{DS} = 0` to +22V
-  :math:`V_{GS} = 0` to 5.5V
-  :math:`V_{BS} = 0` to -2.0V

Details
~~~~~~~

The 20V NMOS zero-VT FET has p-well and all Vt implants blocked to achieve a zero VT.

Major model output parameters are shown below and compared against the EDR (e-test) specs


.. include:: nfet_20v0_zvt-table0.rst



The symbol of the :model:`sky130_fd_pr__nfet_20v0_zvt` (20V NMOS zero-VT FET) is still under development.

The cross-section of the 20V NMOS zero-VT FET is shown below.

|cross-section-nfet_20v0_zvt|

.. |cross-section-nfet_20v0_zvt| image:: cross-section-nfet_20v0_zvt.svg

