Tap Devices
===========

.. role:: red
   :class: red-text

ptap1
-----

**Device Information**

.. list-table:: P-well (substrate) diffusion contact.
   :header-rows: 1
   :stub-columns: 1

   * - Property
     - Value
   * - Description
     - Substrate contact which keeps the substrate a separate net.
   * - Device Recognition
     - Activ, pSD, Substrate, text (`sub!`)
   * - Model Name
     - ptap1
   * - Layout Cell Name
     - sg13g2_pr - ptap1
   * - Parameters
     - W, L, A, P/Perim, R
   * - Netlist Syntax
     - `R1 net1 sub! ptap1 A=608.4f P=3.12u`
   * - Additional Notes
     - :red:`Used in analog designs.` 
   * - 
     - The resistance value is not accurate (~  262 Ω).
   * - 
     - The regular ptap is not recognized as a device.

**Parameters Information**

.. list-table:: Schematic and LVS views Compatibility for ptap1 Parameters
   :header-rows: 1
   :stub-columns: 1

   * - Parameter
     - Description
     - Schematic-View
     - LVS-View
     - LVS-Comparison
   * - W
     - Active width
     - ❌
     - ❌
     - ❌
   * - L
     - Active length
     - ❌
     - ❌
     - ❌
   * - A
     - Active area
     - ❌
     - ✅
     - ✅
   * - P/Perim
     - Active perimeter
     - ❌
     - ✅
     - ✅
   * - R
     - Resistance Value
     - ❌
     - ❌
     - ❌

.. tip::
  - You have the option to use either W/L or A/P in your netlist.

**Layout Information** (Refer to :ref:`layout layers`)

.. image:: images/ptap1_layout.png
    :width: 400
    :align: center
    :alt: ptap1 device - layout

.. rst-class:: center

    Figure 4.9.1 Layout for ptap1 device


ntap1
-----

**Device Information**

.. list-table:: N-well diffusion contact.
   :header-rows: 1
   :stub-columns: 1

   * - Property
     - Value
   * - Description
     - Nwell contact which keeps the nwell a separate net.
   * - Device Recognition
     - Activ, Nwell, text (`well`)
   * - Model Name
     - ntap1
   * - Layout Cell Name
     - sg13g2_pr - ntap1
   * - Parameters
     - W, L, A, P/Perim, R
   * - Netlist Syntax
     - `R1 net1 WELL ntap1 A=608.4f P=3.12u`
   * - Additional Notes
     - :red:`Used in analog designs.`
   * - 
     - The resistance value is not accurate (~  262 Ω)
   * - 
     - The regular ntap is not recognized as a device.

**Parameters Information**

.. list-table:: Schematic and LVS views Compatibility for ntap1 Parameters
   :header-rows: 1
   :stub-columns: 1

   * - Parameter
     - Description
     - Schematic-View
     - LVS-View
     - LVS-Comparison
   * - W
     - Active width
     - ❌
     - ❌
     - ❌
   * - L
     - Active length
     - ❌
     - ❌
     - ❌
   * - A
     - Active area
     - ❌
     - ✅
     - ✅
   * - P/Perim
     - Active perimeter
     - ❌
     - ✅
     - ✅
   * - R
     - Resistance Value
     - ❌
     - ❌
     - ❌

.. tip::
  - You have the option to use either W/L or A/P in your netlist.

**Layout Information** (Refer to :ref:`layout layers`)

.. image:: images/ntap1_layout.png
    :width: 400
    :align: center
    :alt: ntap1 device - layout

.. rst-class:: center

    Figure 4.9.2 Layout for ntap1 device