from ahkab import new_ac, run
from ahkab.circuit import Circuit
from ahkab.plotting import plot_results # calls matplotlib for you
import numpy as np
import matplotlib.pyplot as plt
# Define the circuit
cir = Circuit('Butterworth 1kHz band-pass filter')
cir.add_vsource('V1', 'n1', cir.gnd, dc_value=0., ac_value=1.)
cir.add_resistor('R1', 'n1', 'n2', 50.)
cir.add_inductor('L1', 'n2', 'n3', 0.245894)
cir.add_capacitor('C1', 'n3', 'n4', 1.03013e-07)
cir.add_inductor('L2', 'n4', cir.gnd, 9.83652e-05)
cir.add_capacitor('C2', 'n4', cir.gnd, 0.000257513)
cir.add_inductor('L3', 'n4', 'n5', 0.795775)
cir.add_capacitor('C3', 'n5', 'n6', 3.1831e-08)
cir.add_inductor('L4', 'n6', cir.gnd, 9.83652e-05)
cir.add_capacitor('C4', 'n6', cir.gnd, 0.000257513)
cir.add_capacitor('C5', 'n7', 'n8', 1.03013e-07)
cir.add_inductor('L5', 'n6', 'n7', 0.245894)
cir.add_resistor('R2', 'n8', cir.gnd, 50.)
# Define the analysis
ac1 = new_ac(.97e3, 1.03e3, 1e2, x0=None)
# run it
res = run(cir, ac1)
# plot the results
plot_results('5th order 1kHz Butterworth filter', [('|Vn8|',"")], res['ac'],
outfilename='bpf_transfer_fn.png')
from ahkab.circuit import Circuit
from ahkab.symbolic import symbolic_analysis
import matplotlib.pyplot as plt
R = 1 #0.1e3
L = 1e-2 #0.2e-12
C = 0.5 #0.3e-9
c = Circuit('Sincronização de circuito LC')
# resistors must be placed so all tanks are connected through one
c.add_resistor('R1', 'n1', 'n2', R)
c.add_resistor('R2', 'n2', 'n3', R)
c.add_resistor('R3', 'n3', 'n4', R)
c.add_resistor('R3', 'n4', 'n2', R)
# tank1
c.add_inductor('L1', 'n1', c.gnd, L)
c.add_capacitor('C1', 'n1', c.gnd, C)
# tank2
c.add_inductor('L2', 'n2', c.gnd, L)
c.add_capacitor('C2', 'n2', c.gnd, C)
# tank3
c.add_inductor('L3', 'n3', c.gnd, L)
c.add_capacitor('C3', 'n3', c.gnd, C)
# tank4
c.add_inductor('L4', 'n4', c.gnd, L)
c.add_capacitor('C4', 'n4', c.gnd, C)
# Interferência destrutiva
x0 = ahkab.new_x0(c, {
'V(n1)': -0.2 / C,
'V(n2)': -0.1 / C,
'V(n3)': 0.1 / C,
