.. include:: /project-links.txt
.. include:: /abbreviation.txt


#################
 Voltage Divider
#################

.. getthecode:: voltage-divider.py
    :language: python3
    :hidden:
    :notebook:

This example shows the computation of the DC bias and sensitivity in a voltage divider.

.. code-block:: py3

    
    
    import PySpice.Logging.Logging as Logging
    logger = Logging.setup_logging()
    
    
    from PySpice.Spice.Netlist import Circuit
    from PySpice.Unit import *
    
    


.. image:: voltage-divider.png
    :align: center


.. code-block:: py3

    
    circuit = Circuit('Voltage Divider')
    
    circuit.V('input', 'in', circuit.gnd, 10@u_V)
    circuit.R(1, 'in', 'out', 9@u_kΩ)
    circuit.R(2, 'out', circuit.gnd, 1@u_kΩ)
    
    
    simulator = circuit.simulator(temperature=25, nominal_temperature=25)
    
    analysis = simulator.operating_point()
    for node in (analysis['in'], analysis.out): # .in is invalid !
        print('Node {}: {} V'.format(str(node), float(node)))


.. code-block:: none

    Node in: 10.0 V
    Node out: 1.0 V
    


.. code-block:: py3

    
    # Fixme: Xyce sensitivity analysis
    analysis = simulator.dc_sensitivity('v(out)')
    for element in analysis.elements.values():
        print(element, float(element))


.. code-block:: none

    vinput 0.09999999999621426
    r1_scale -0.8999991000992625
    r1_bv_max -0.0
    r1_m 0.8999999999287899
    r1_w -0.0
    r1_l -0.0
    r1 -9.999990001102918e-05
    r1:ef -0.0
    r1:wf -0.0
    r1:lf -0.0
    r1:bv_max -0.0
    r2_scale 0.899999099855317
    r2_bv_max -0.0
    r2_m -0.8999999999165925
    r2_w -0.0
    r2_l -0.0
    r2 0.0008999991000504734
    r2:ef -0.0
    r2:wf -0.0
    r2:lf -0.0
    r2:bv_max -0.0