4.17.1. Time Delay

time-delay.pytime-delay.py
#!# This example shows the simulation of a transmission line.

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import matplotlib.pyplot as plt

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

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

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

from PySpice.Probe.Plot import plot
from PySpice.Spice.Netlist import Circuit
from PySpice.Unit import *

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

#!# We will drive the transmission line with a pulse source and use a standard 50 Ω load.

circuit = Circuit('Transmission Line')
circuit.Pulse('pulse', 'input', circuit.gnd, 0@u_V, 1@u_V, 1@u_ns, 1@u_us)
circuit.TransmissionLine('delay', 'input', circuit.gnd, 'output',
                         circuit.gnd, impedance=50, time_delay=40e-9)
circuit.R('load', 'output', circuit.gnd, 50@u_Ω)

simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=1e-11, end_time=100e-9)

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

figure = plt.figure(None, (20, 6))
plot(analysis['input'])
plot(analysis['output'])
plt.xlabel('Time [s]')
plt.ylabel('Voltage (V)')
plt.grid()
plt.legend(['input', 'output'], loc='upper right')

plt.show()

#fig# save_figure(figure, 'time-delay.png')

This example shows the simulation of a transmission line.

import matplotlib.pyplot as plt

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

from PySpice.Probe.Plot import plot
from PySpice.Spice.Netlist import Circuit
from PySpice.Unit import *

We will drive the transmission line with a pulse source and use a standard 50 Ω load.

circuit = Circuit('Transmission Line')
circuit.Pulse('pulse', 'input', circuit.gnd, 0@u_V, 1@u_V, 1@u_ns, 1@u_us)
circuit.TransmissionLine('delay', 'input', circuit.gnd, 'output',
                         circuit.gnd, impedance=50, time_delay=40e-9)
circuit.R('load', 'output', circuit.gnd, 50@u_Ω)

simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=1e-11, end_time=100e-9)

figure = plt.figure(None, (20, 6))
plot(analysis['input'])
plot(analysis['output'])
plt.xlabel('Time [s]')
plt.ylabel('Voltage (V)')
plt.grid()
plt.legend(['input', 'output'], loc='upper right')

plt.show()
../../_images/time-delay.png