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

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

-  Cell Name: :cell:`sky130_fd_pr_base__nfetexd`
-  Model Name: :model:`sky130_fd_pr_base__n20zvtvhv1`

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

-  V\ :sub:`DS` = 0 to +22V
-  V\ :sub:`GS` = 0 to 5.5V
-  V\ :sub:`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:: fet-nmos-20v-zero-vt-table0.rst


The symbol of the :model:`sky130_fd_pr_base__n20zvtvhv1` (20V NMOS zero-VT FET) is still under development.

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

|cross-section-20v-nmos-zero-vt-fet|

.. |cross-section-20v-nmos-zero-vt-fet| image:: cross-section-20v-nmos-zero-vt-fet.svg