8.15.2. Voltage Divider¶

voltage-divider.py
voltage-divider.py

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

####################################################################################################

import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging()

####################################################################################################

from PySpice.Spice.Netlist import Circuit
from PySpice.Unit import *

####################################################################################################

#f# circuit_macros('voltage-divider.m4')

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)))
#o#

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

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

import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging()


from PySpice.Spice.Netlist import Circuit
from PySpice.Unit import *

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)))

[1;32m2019-03-10 18:51:23,669[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.535 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,670[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.535 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,671[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.535 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,671[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.535 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,672[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.535 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,673[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.559 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,673[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.680 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,674[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.840 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,675[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.902 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,675[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.934 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,676[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.984 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,677[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  823.984 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,681[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  824.242 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,682[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  824.242 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,683[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  824.242 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,689[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  824.449 MB, limit =  472.371 MB

Node in: 10.0 V
Node out: 1.0 V

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

[1;32m2019-03-10 18:51:23,718[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  824.828 MB, limit =  472.371 MB

[1;32m2019-03-10 18:51:23,720[0m - [1;34mPySpice.Spice.NgSpice.Shared.NgSpiceShared._send_char[0m - [1;31mERROR[0m - Warning - approaching max data size: current size =  824.957 MB, limit =  472.371 MB

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