def test_pulse():
"""Test time_functions.pulse"""
# as we cannot define a periodic function in sympy, we will only check one
# period
v1, v2, td, tr, pw, tf, per, time = sympy.symbols('v1, v2, td, tr, pw, ' +
'tf, per, time')
F = v1*Heaviside(td - time) + \
((v2 - v1)/tr*time + v1 +(v1 - v2)*td/tr)* \
Heaviside(time - td)*Heaviside(td + tr - time) + \
v2*Heaviside(time - td - tr)*Heaviside(td + tr + pw - time) + \
((v1 - v2)/tf*time + v2 + (-v1*(pw + td + tr) + v2*(pw + td + tr))/tf)* \
Heaviside(time - td - tr - pw)*Heaviside(td + tr + pw + tf - time) + \
v1*Heaviside(time - td - tr - pw - tf)
v1n, v2n, tdn, trn, pwn, tfn, pern = (-2, 3, 0.1e-3, 0.05e-3, .5e-3,
.01e-3, 1e-3)
f = time_functions.pulse(v1=v1n,
v2=v2n,
td=tdn,
tr=trn,
pw=pwn,
tf=tfn,
per=pern)
FS = sympy.lambdify(
time,
sympy.N(
F.subs(
dict(v1=v1n, v2=v2n, td=tdn, tr=trn, pw=pwn, tf=tfn,
per=pern))))
t = np.linspace(0, 1e-3, 1e3)
for ti in t:
assert np.allclose(f(ti), float(FS(ti)), rtol=1e-4)
def test_pulse():
"""Test time_functions.pulse"""
# as we cannot define a periodic function in sympy, we will only check one
# period
v1, v2, td, tr, pw, tf, per, time = sympy.symbols('v1, v2, td, tr, pw, ' +
'tf, per, time')
F = v1*Heaviside(td - time) + \
((v2 - v1)/tr*time + v1 +(v1 - v2)*td/tr)* \
Heaviside(time - td)*Heaviside(td + tr - time) + \
v2*Heaviside(time - td - tr)*Heaviside(td + tr + pw - time) + \
((v1 - v2)/tf*time + v2 + (-v1*(pw + td + tr) + v2*(pw + td + tr))/tf)* \
Heaviside(time - td - tr - pw)*Heaviside(td + tr + pw + tf - time) + \
v1*Heaviside(time - td - tr - pw - tf)
v1n, v2n, tdn, trn, pwn, tfn, pern = (-2, 3, 0.1e-3, 0.05e-3, .5e-3,
.01e-3, 1e-3)
f = time_functions.pulse(
v1=v1n, v2=v2n, td=tdn, tr=trn, pw=pwn, tf=tfn, per=pern)
FS = sympy.lambdify(
time,
sympy.N(
F.subs(
dict(v1=v1n, v2=v2n, td=tdn, tr=trn, pw=pwn, tf=tfn,
per=pern))))
t = np.linspace(0, 1e-3, 1e3)
for ti in t:
assert np.allclose(f(ti), float(FS(ti)), rtol=1e-4)
def test():
"""Test pulse and sin API"""
step = time_functions.pulse(v1=0, v2=1, td=500e-9, tr=1e-12, pw=1, tf=1e-12, per=2)
damped_sin = time_functions.sin(vo=0, va=1, td=500e-9, freq=15e3, theta=5e3, phi=90.)
exp = time_functions.exp(v1=.5, v2=-.05, td1=0, tau1=20e-6, td2=400e-6, tau2=20e-6)
mycircuit = circuit.Circuit(title="Butterworth Example circuit", filename=None)
gnd = mycircuit.get_ground_node()
mycircuit.add_resistor(part_id="R1", n1="n1", n2="n2", value=600)
mycircuit.add_inductor(part_id="L1", n1="n2", n2="n3", value=15.24e-3)
mycircuit.add_capacitor(part_id="C1", n1="n3", n2=gnd, value=119.37e-9)
mycircuit.add_inductor(part_id="L2", n1="n3", n2="n4", value=61.86e-3)
mycircuit.add_capacitor(part_id="C2", n1="n4", n2=gnd, value=155.12e-9)
mycircuit.add_resistor(part_id="R2", n1="n4", n2=gnd, value=1.2e3)
mycircuit.add_vsource("V1", n1="n1", n2='n5', dc_value=3.3333, ac_value=.33333, function=step)
mycircuit.add_vsource("V2", n1="n5", n2='n6', dc_value=3.3333, ac_value=.33333, function=damped_sin)
mycircuit.add_vsource("V3", n1="n6", n2=gnd, dc_value=3.3333, ac_value=.33333, function=exp)
op_analysis = ahkab.new_op(outfile='time_functions')
ac_analysis = ahkab.new_ac(start=1e3, stop=1e5, points=100, outfile='time_functions')
tran_analysis = ahkab.new_tran(tstart=0, tstop=1.2e-3, tstep=1e-6, x0=None, outfile='time_functions')
testbench = testing.APITest('time_functions', mycircuit,
[op_analysis, ac_analysis, tran_analysis],
skip_on_travis=True, er=1e-3, ea=1e-5)
testbench.setUp()
testbench.test()
if cli:
r = ahkab.run(mycircuit, an_list=[op_analysis, ac_analysis, tran_analysis])
fig = plt.figure()
plt.title(mycircuit.title + " - TRAN Simulation")
plt.plot(r['tran']['T'], r['tran']['VN1'], label="Input voltage")
plt.hold(True)
plt.plot(r['tran']['T'], r['tran']['VN4'], label="output voltage")
plt.legend()
plt.hold(False)
plt.grid(True)
#plt.ylim([0,1.2])
plt.ylabel('Step response')
plt.xlabel('Time [s]')
fig.savefig('tran_plot.png')
fig = plt.figure()
plt.subplot(211)
plt.semilogx(r['ac']['w'], np.abs(r['ac']['Vn4']), 'o-')
plt.ylabel('abs(V(n4)) [V]')
plt.title(mycircuit.title + " - AC Simulation")
plt.subplot(212)
plt.grid(True)
plt.semilogx(r['ac']['w'], np.angle(r['ac']['Vn4']), 'o-')
plt.xlabel('Angular frequency [rad/s]')
plt.ylabel('arg(V(n4)) [rad]')
fig.savefig('ac_plot.png')
else:
testbench.tearDown()
import numpy as np
import ahkab
from ahkab import ahkab, circuit, time_functions
mycircuit = circuit.Circuit(title="Butterworth Example circuit", filename=None)
gnd = mycircuit.get_ground_node()
mycircuit.add_resistor("R1", n1="n1", n2="n2", value=600)
mycircuit.add_inductor("L1", n1="n2", n2="n3", value=15.24e-3)
mycircuit.add_capacitor("C1", n1="n3", n2=gnd, value=119.37e-9)
mycircuit.add_inductor("L2", n1="n3", n2="n4", value=61.86e-3)
mycircuit.add_capacitor("C2", n1="n4", n2=gnd, value=155.12e-9)
mycircuit.add_resistor("R2", n1="n4", n2=gnd, value=1.2e3)
voltage_step = time_functions.pulse(v1=0, v2=1, td=500e-9, tr=1e-12, pw=1, tf=1e-12, per=2)
mycircuit.add_vsource("V1", n1="n1", n2=gnd, dc_value=5, ac_value=1, function=voltage_step)
print mycircuit
op_analysis = ahkab.new_op()
ac_analysis = ahkab.new_ac(start=1e3, stop=1e5, points=100)
tran_analysis = ahkab.new_tran(tstart=0, tstop=1.2e-3, tstep=1e-6, x0=None)
r = ahkab.run(mycircuit, an_list=[op_analysis, ac_analysis, tran_analysis])
import pylab
fig = pylab.figure()
pylab.title(mycircuit.title + " - TRAN Simulation")
pylab.plot(r['tran']['T'], r['tran']['VN1'], label="Input voltage")
mycircuit = circuit.Circuit(title="Butterworth Example circuit", filename=None)
gnd = mycircuit.get_ground_node()
mycircuit.add_resistor("R1", n1="n1", n2="n2", value=600)
mycircuit.add_inductor("L1", n1="n2", n2="n3", value=15.24e-3)
mycircuit.add_capacitor("C1", n1="n3", n2=gnd, value=119.37e-9)
mycircuit.add_inductor("L2", n1="n3", n2="n4", value=61.86e-3)
mycircuit.add_capacitor("C2", n1="n4", n2=gnd, value=155.12e-9)
mycircuit.add_resistor("R2", n1="n4", n2=gnd, value=1.2e3)
voltage_step = time_functions.pulse(v1=0,
v2=1,
td=500e-9,
tr=1e-12,
pw=1,
tf=1e-12,
per=2)
mycircuit.add_vsource("V1",
n1="n1",
n2=gnd,
dc_value=5,
ac_value=1,
function=voltage_step)
print mycircuit
op_analysis = ahkab.new_op()
ac_analysis = ahkab.new_ac(start=1e3, stop=1e5, points=100)
tran_analysis = ahkab.new_tran(tstart=0, tstop=1.2e-3, tstep=1e-6, x0=None)
elif V_DC_pattern:
V_Name = V_DC_pattern.group(1)
V_Np = V_DC_pattern.group(2)
V_Nn = V_DC_pattern.group(3)
V_value = unit_transform(V_DC_pattern.group(7))
mycircuit.add_vsource(V_Name, n1=V_Np, n2=V_Nn, dc_value=V_value)
elif V_AC_pattern:
V_Name = V_AC_pattern.group(1)
V_Np = V_AC_pattern.group(2)
V_Nn = V_AC_pattern.group(3)
V_value = unit_transform(V_AC_pattern.group(7))
V_AC_phase = V_AC_pattern.group(10)
mycircuit.add_vsource(V_Name, n1=V_Np, n2=V_Nn, ac_value=V_value)
elif V_PULSE_pattern:
V_PULSE = PulseVoltageSource(line)
v_pulse = time_functions.pulse(v1=V_PULSE.voltage_low, v2=V_PULSE.voltage_high, td=V_PULSE.delay,
per=V_PULSE.period, tr=V_PULSE.rise, tf=V_PULSE.fall, pw=V_PULSE.width)
mycircuit.add_vsource(V_PULSE.name, n1=V_PULSE.Np, n2=V_PULSE.Nn, function=v_pulse)
elif I_DC_pattern:
I_Name = I_DC_pattern.group(1)
I_Np = I_DC_pattern.group(2)
I_Nn = I_DC_pattern.group(3)
I_value = unit_transform(I_DC_pattern.group(7))
mycircuit.add_isource(I_Name, n1=I_Np, n2=I_Nn, dc_value=I_value)
elif I_AC_pattern:
I_Name = I_AC_pattern.group(1)
I_Np = I_AC_pattern.group(2)
I_Nn = I_AC_pattern.group(3)
I_value = unit_transform(I_AC_pattern.group(7))
mycircuit.add_isource(I_Name, n1=I_Np, n2=I_Nn, ac_value=I_value)
elif E_pattern:
E_name = E_pattern.group(1)
n2="n%s" % (3 * i + 2),
value=Rs)
mycircuit.add_capacitor("Cj%s" % (i),
n1="n%s" % (3 * i + 2),
n2=gnd,
value=Cj)
# mycircuit.add_resistor("Rsub%s" % (i), n1="n%s" %(4*i-1), n2="n%s" %(4*i), value=20000.28)
# mycircuit.add_capacitor("Cox%s" % (i), n1="n%s" %(4*i), n2=gnd, value=4.09e-20)
mycircuit.add_resistor("Rt", n1="n%s" % (3 * i + 1), n2=gnd, value=25.0)
# voltage_step = time_functions.pulse(v1=0, v2=1, td=500e-9, tr=1e-12, pw=1, tf=1e-12, per=2)
voltage_step = time_functions.pulse(v1=0,
v2=1,
td=0.1e-9,
tr=1e-12,
pw=0.5e-9,
tf=1e-12,
per=1)
# voltage_step = time_functions.pulse(v1=0, v2=1, td=1e-12, tr=1e-15, pw=1, tf=1e-15, per=1)
mycircuit.add_vsource("V1",
n1="n1",
n2=gnd,
dc_value=0,
ac_value=0.1,
function=voltage_step)
print mycircuit
op_analysis = ahkab.new_op()
ac_analysis = ahkab.new_ac(start=1e8, stop=5e10, points=1e2)
