def test():
"""Test NL AC analysis (API)"""
cir = ahkab.Circuit('CS amplifier')
mys = ahkab.time_functions.sin(0, 1, 60)
cir.add_vsource('vin', '1', '0', dc_value=3, ac_value=1)
cir.add_vsource('vdd', '3', '0', dc_value=30)
cir.add_resistor('Rd', '3', '2', 10e3)
cir.add_capacitor('Cd', '3', '2', 40e-12)
cir.add_resistor('Rs', '4', '0', 1e3)
cir.add_capacitor('Cs', '4', '0', 4e-6)
cir.add_model('ekv', 'ekv0', {'TYPE':'n', 'VTO':.4, 'KP':1e-2})
cir.add_mos('m1', '2', '1', '4', '0', w=100e-6, l=1e-6, model_label='ekv0')
print(cir)
opa = ahkab.new_op(outfile='acnl', verbose=6)
aca = ahkab.new_ac(1, 100e6, 10e3, outfile='acnl', verbose=6)
r = ahkab.run(cir, [opa, aca])['ac']
testbench = testing.APITest('acnl', cir, [opa, aca], skip_on_travis=False,
er=1e-3, ea=1e-5)
testbench.setUp()
testbench.test()
if not cli:
testbench.tearDown()
def test():
"""Test NL AC analysis (API)"""
cir = ahkab.Circuit('CS amplifier')
mys = ahkab.time_functions.sin(0, 1, 60)
cir.add_vsource('vin', '1', '0', dc_value=3, ac_value=1)
cir.add_vsource('vdd', '3', '0', dc_value=30)
cir.add_resistor('Rd', '3', '2', 10e3)
cir.add_capacitor('Cd', '3', '2', 40e-12)
cir.add_resistor('Rs', '4', '0', 1e3)
cir.add_capacitor('Cs', '4', '0', 4e-6)
cir.add_model('ekv', 'ekv0', {'TYPE': 'n', 'VTO': .4, 'KP': 1e-2})
cir.add_mos('m1', '2', '1', '4', '0', w=100e-6, l=1e-6, model_label='ekv0')
print(cir)
opa = ahkab.new_op(outfile='acnl', verbose=6)
aca = ahkab.new_ac(1, 100e6, 10e3, outfile='acnl', verbose=6)
r = ahkab.run(cir, [opa, aca])['ac']
testbench = testing.APITest('acnl',
cir, [opa, aca],
skip_on_travis=False,
er=1e-3,
ea=1e-5)
testbench.setUp()
testbench.test()
if not cli:
testbench.tearDown()
def test():
"""Test pulse and sin API"""
step = devices.pulse(v1=0, v2=1, td=500e-9, tr=1e-12, pw=1, tf=1e-12, per=2)
damped_sin = devices.sin(vo=0, va=1, td=500e-9, freq=15e3, theta=5e3, phi=90.)
exp = devices.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()
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()
def run_ac(circuit):
"""
:param circuit: ahkab circuit
:return: results for AC analysis
"""
opa = ahkab.new_op()
aca = ahkab.new_ac(ac_params['start'], ac_params['stop'], ac_params['pts'])
return ahkab.run(circuit, [opa, aca])['ac']
def setUp(self):
ttn = ahkab.Circuit('Twin-T Notch Stopband filter')
ttn.add_vsource('V1', 'in', ttn.gnd, dc_value=1, ac_value=1)
# first path
ttn.add_capacitor('C1', 'in', 'n1', 2.2e-12)
ttn.add_capacitor('C2', 'n1', 'out', 2.2e-12)
ttn.add_resistor('R1', 'n1', ttn.gnd, 1e3)
# second path
ttn.add_resistor('R2', 'in', 'n2', 2e3)
ttn.add_resistor('R3', 'n2', 'out', 2e3)
ttn.add_capacitor('C3', 'n2', ttn.gnd, 2 * 2.2e-12)
ttn.add_vcvs('E1', 'outb', ttn.gnd, 'out', ttn.gnd, 1.)
aca = ahkab.new_ac(1e7, 1e10, 100, x0=None)
self.r = ahkab.run(ttn, aca)['ac']
def setUp(self):
ttn = ahkab.Circuit('Twin-T Notch Stopband filter')
ttn.add_vsource('V1', 'in', ttn.gnd, dc_value=1, ac_value=1)
# first path
ttn.add_capacitor('C1', 'in', 'n1', 2.2e-12)
ttn.add_capacitor('C2', 'n1', 'out', 2.2e-12)
ttn.add_resistor('R1', 'n1', ttn.gnd, 1e3)
# second path
ttn.add_resistor('R2', 'in', 'n2', 2e3)
ttn.add_resistor('R3', 'n2', 'out', 2e3)
ttn.add_capacitor('C3', 'n2', ttn.gnd, 2*2.2e-12)
ttn.add_vcvs('E1', 'outb', ttn.gnd, 'out', ttn.gnd, 1.)
aca = ahkab.new_ac(1e7, 1e10, 100, x0=None)
self.r = ahkab.run(ttn, aca)['ac']
def test():
"""Test CCCS API"""
# The circuit is:
#test for transresitances
#va 1 2 type=vdc vdc=.1 vac=1
#r1 1 0 .5k
#r2 2 0 .5k
#h1 3 4 va 5000
#r3 3 0 1k
#r4 4 5 1k
#l1 5 0 10u
#c1 5 0 10u
#.op
#.ac start=50k stop=5e5 nsteps=1000
#.symbolic
#.plot ac |v(5)|
mycircuit = circuit.Circuit(title="Test CCVS API", filename=None)
gnd = mycircuit.get_ground_node()
mycircuit.add_resistor(part_id="R1", n1="1", n2=gnd, value=500)
mycircuit.add_resistor(part_id="R2", n1="2", n2=gnd, value=500)
mycircuit.add_vsource("VA", n1="1", n2='2', dc_value=0.1, ac_value=1.)
mycircuit.add_ccvs('H1', n1='3', n2='4', source_id='VA', value=5000)
mycircuit.add_resistor(part_id="R3", n1="3", n2=gnd, value=1e3)
mycircuit.add_resistor(part_id="R4", n1="4", n2="5", value=1e3)
mycircuit.add_inductor(part_id="L1", n1="5", n2=gnd, value=10e-6)
mycircuit.add_capacitor(part_id="C1", n1="5", n2=gnd, value=10e-6)
print(mycircuit)
op_analysis = ahkab.new_op(outfile='hvsource_api', verbose=6)
symb_analysis = ahkab.new_symbolic(outfile='hvsource_api', verbose=6)
ac_analysis = ahkab.new_ac(outfile='hvsource_api', start=7957.747,
stop=79577.471, points=1000, verbose=6)
testbench = testing.APITest('hvsource', mycircuit,
[op_analysis, symb_analysis, ac_analysis],
skip_on_travis=False, er=1e-3, ea=1e-5)
testbench.setUp()
testbench.test()
if not cli:
testbench.tearDown()
def test():
"""Test CCCS API"""
# The circuit is:
#test for transresitances
#va 1 2 type=vdc vdc=.1 vac=1
#r1 1 0 .5k
#r2 2 0 .5k
#h1 3 4 va 5000
#r3 3 0 1k
#r4 4 5 1k
#l1 5 0 10u
#c1 5 0 10u
#.op
#.ac start=50k stop=5e5 nsteps=1000
#.symbolic
#.plot ac |v(5)|
mycircuit = circuit.Circuit(title="Test CCVS API", filename=None)
gnd = mycircuit.get_ground_node()
mycircuit.add_resistor(part_id="R1", n1="1", n2=gnd, value=500)
mycircuit.add_resistor(part_id="R2", n1="2", n2=gnd, value=500)
mycircuit.add_vsource("VA", n1="1", n2='2', dc_value=0.1, ac_value=1.)
mycircuit.add_ccvs('H1', n1='3', n2='4', source_id='VA', value=5000)
mycircuit.add_resistor(part_id="R3", n1="3", n2=gnd, value=1e3)
mycircuit.add_resistor(part_id="R4", n1="4", n2="5", value=1e3)
mycircuit.add_inductor(part_id="L1", n1="5", n2=gnd, value=10e-6)
mycircuit.add_capacitor(part_id="C1", n1="5", n2=gnd, value=10e-6)
print(mycircuit)
op_analysis = ahkab.new_op(outfile='hvsource_api', verbose=6)
symb_analysis = ahkab.new_symbolic(outfile='hvsource_api', verbose=6)
ac_analysis = ahkab.new_ac(outfile='hvsource_api', start=50e3, stop=500e3,
points=1000, verbose=6)
testbench = testing.APITest('hvsource', mycircuit,
[op_analysis, symb_analysis, ac_analysis],
skip_on_travis=False, er=1e-3, ea=1e-5)
testbench.setUp()
testbench.test()
if not cli:
testbench.tearDown()
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")
pylab.hold(True)
pylab.plot(r['tran']['T'], r['tran']['VN4'], label="output voltage")
pylab.legend()
pylab.hold(False)
pylab.grid(True)
pylab.ylim([0,1.2])
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")
pylab.hold(True)
pylab.plot(r['tran']['T'], r['tran']['VN4'], label="output voltage")
pylab.legend()
pylab.hold(False)
pylab.grid(True)
pylab.ylim([0, 1.2])
def test():
"""Test SVF Biquad"""
mycircuit = Circuit(title="state variable filter")
gnd = mycircuit.get_ground_node()
buildsvf(mycircuit)
mycircuit.add_vsource(part_id="V1", n1="in", n2=gnd, dc_value=5, ac_value=1)
if cli:
print(mycircuit)
subs = {'E2':'E1', 'E3':'E1', 'R01':'R00', 'R02':'R00', 'R11':'R00',
'R10':'R00', 'C11':'C10', 'Rf2':'Rf1', 'Rin':'R00'}
symbolic_sim = ahkab.new_symbolic(ac_enable=True, subs=subs, outfile='svf_biquad')
ac_sim = ahkab.new_ac(start=0.1, stop=100e6, points=1000, x0=None, outfile='svf_biquad')
testbench = testing.APITest('svf_biquad', mycircuit, [symbolic_sim, ac_sim],
skip_on_travis=True, er=1e-3, ea=1e-5)
testbench.setUp()
testbench.test()
if cli:
r = ahkab.run(mycircuit, [symbolic_sim, ac_sim])
E = r['symbolic'][0].as_symbol('E1')
out_hp = sympy.limit(r['symbolic'][0]['VU1o'], E, sympy.oo, '+')
out_bp = sympy.limit(r['symbolic'][0]['VU2o'], E, sympy.oo, '+')
out_lp = sympy.limit(r['symbolic'][0]['VU3o'], E, sympy.oo, '+')
out_hp = out_hp.simplify()
out_bp = out_bp.simplify()
out_lp = out_lp.simplify()
print("VU1o =", out_hp)
print("VU2o =", out_bp)
print("VU3o =", out_lp)
w = sympy.Symbol('w')
out_hp = out_hp.subs({r['symbolic'][0].as_symbol('RF1'):10e3,
r['symbolic'][0].as_symbol('C10'):15e-9,
r['symbolic'][0].as_symbol('V1'):1,
r['symbolic'][0].as_symbol('s'):1j*w,
})
out_bp = out_bp.subs({r['symbolic'][0].as_symbol('RF1'):10e3,
r['symbolic'][0].as_symbol('C10'):15e-9,
r['symbolic'][0].as_symbol('V1'):1,
r['symbolic'][0].as_symbol('s'):1j*w,
})
out_lp = out_lp.subs({r['symbolic'][0].as_symbol('RF1'):10e3,
r['symbolic'][0].as_symbol('C10'):15e-9,
r['symbolic'][0].as_symbol('V1'):1,
r['symbolic'][0].as_symbol('s'):1j*w,
})
out_lp = sympy.lambdify((w,), out_lp)
out_bp = sympy.lambdify((w,), out_bp)
out_hp = sympy.lambdify((w,), out_hp)
ws = r['ac']['w'][::30]
fig = plt.figure()
plt.title(mycircuit.title)
plt.subplot(211)
plt.hold(True)
plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU1o'])), label="HP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU2o'])), label="BP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU3o'])), label="LP output (AC)")
plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_hp(ws))), 'v', label="HP output (SYMB)")
plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_bp(ws))), 'v', label="BP output (SYMB)")
plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_lp(ws))), 'v', label="LP output (SYMB)")
plt.hold(False)
plt.grid(True)
plt.legend()
plt.ylabel('Magnitude [dB]')
plt.xlabel('Frequency [Hz]')
plt.subplot(212)
plt.hold(True)
plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU1o']), label="HP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU2o']), label="BP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU3o']), label="LP output (AC)")
plt.semilogx(ws/2./np.pi, np.angle(out_hp(ws)), 'v', label="HP output (SYMB)")
plt.semilogx(ws/2./np.pi, np.angle(out_bp(ws)), 'v', label="BP output (SYMB)")
plt.semilogx(ws/2./np.pi, np.angle(out_lp(ws)), 'v', label="LP output (SYMB)")
plt.legend()
plt.hold(False)
plt.grid(True)
#plt.ylim([0,1.2])
plt.ylabel('Phase [rad]')
plt.xlabel('Frequency [Hz]')
fig.savefig('ac_plot.png')
else:
testbench.tearDown()
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')
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)
tran_analysis = ahkab.new_tran(tstart=0, tstop=1e-9, tstep=1e-12, x0=None)
# tran_analysis = ahkab.new_tran(tstart=0, tstop=10e-9, tstep=10e-12, x0=None)
r = ahkab.run(mycircuit, an_list=[op_analysis, ac_analysis, tran_analysis])
# r = ahkab.run(mycircuit, an_list=[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")
pylab.hold(True)
pylab.plot(r['tran']['T'], r['tran']['VN3'], label="output voltage")
pylab.legend()
pylab.hold(False)
tr=1e-12,
pw=1,
tf=1e-12,
per=2)
# voltage_step = time_functions.pulse(v1=0, v2=1, td=0.1e-6, tr=1e-12, pw=0.5e-6, tf=1e-12, per=1.0e-6)
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=1e6, stop=1e11, points=1e2)
tran_analysis = ahkab.new_tran(tstart=0, tstop=14e-6, tstep=0.1e-6, x0=None)
# r = ahkab.run(mycircuit, an_list=[op_analysis, ac_analysis, tran_analysis])
r = ahkab.run(mycircuit, an_list=[ac_analysis, tran_analysis])
import pylab
fig = pylab.figure()
pylab.title(mycircuit.title + " - TRAN Simulation")
pylab.plot(r['tran']['T'] * 1e6, r['tran']['VN1'], label="Input voltage")
pylab.hold(True)
pylab.plot(r['tran']['T'] * 1e6, r['tran']['VN2'], label="output voltage")
pylab.legend()
pylab.hold(False)
pylab.grid(True)
from ahkab.circuit import Circuit
from ahkab.plotting import plot_results # calls matplotlib for you
import numpy as np
# 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(2. * np.pi * .97e3, 2. * np.pi * 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')
av = svf.add_vsource
ao = lambda name, p, n: svf.add_vcvs("E"+name[1:], name+"o", gnd, p, n, 1e6)
ao("u1", "u1p", "u1o")
ar("R1", "in", "nR2", 10e3)
ar("R2", "nR2", "u1p", 10e3)
ac("C1", "u1o", "nR2", 1e-9)
ac("C2", "u1p", gnd, 1e-9)
av("V1", "in", gnd, 2.5, 1.0)
buildsk(mycircuit)
print(mycircuit)
symbolic_sim = ahkab.new_symbolic(ac_enable=True, source='V1')
ac_sim = ahkab.new_ac(start=10, stop=100e6, points=1000, x0=None)
try:
r = pickle.load(open("results-sallenkey.pk"))
except:
ahkab.queue(ac_sim, symbolic_sim)
r = ahkab.run(mycircuit)
pickle.dump(r, open("results-sallenkey.pk", "wb"))
print r['symbolic'][0]
print "Symbolic transfer functions:"
printing.print_symbolic_transfer_functions(r['symbolic'][1])
# substitute the actual values to the symbols and plot
V1 = r['symbolic'][0].as_symbol('V1')
tf = r['symbolic'][0]['Vu1o']/V1
@author: Mahmoud
"""
import ahkab
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
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.)
ac1 = new_ac(.97e3, 1.03e3, 1e2, x0=None, outfile=r"E:\New Text Document.txt ")
res = run(cir, ac1)
#ahkab.new_dc()
#print(cir)
#plot_results('5th order 1kHz Butterworth filter', [('|Vn8|',"")], res['ac'],
# outfilename='bpf_transfer_fn.png')
if Type[0] == 'G': #--->Adding vccs<---#
ac_circuit.add_vccs(Type,N1,N2,NS1,NS2,Value)
vccs[vccsi]=X.split()
vccsi+=1
else:
if Type[0] == 'F': #--->Adding cccs<---#
ac_circuit.add_cccs(Type,N1,N2,Vsource,Value)
cccs[cccsi]=X.split()
cccsi+=1
else:
if Type[0] == 'I': #--->Adding independent current source<---#
ac_circuit.add_isource(Type,Node1,Node2,dc_value = 0,ac_value = Value*(math.cos(math.radians(Phase))+math.sin(math.radians(Phase))*1j))
current_sources[ci]=X.split()
ci+=1
ac = ahkab.new_ac(start = freq,stop = freq,points = 2,x0 = None) #setting the analysis
res = ahkab.run(ac_circuit,ac) #runnung the ac ciruit
array = res['ac'].values() #getting the result's values
print()
print("Values:")
print(array)
keys = res['ac'].keys() #getting the result's keys
print()
print("Keys:")
print(keys)
print()
i=1
j=1
while j < len(keys):
if(keys[i][0] != 'I'):
def test():
"""Test SVF Biquad"""
mycircuit = Circuit(title="state variable filter")
gnd = mycircuit.get_ground_node()
buildsvf(mycircuit)
mycircuit.add_vsource(part_id="V1", n1="in", n2=gnd, dc_value=5, ac_value=1)
if cli:
printing.print_circuit(mycircuit)
subs = symbolic.parse_substitutions(('E2=E1', 'E3=E1', 'R01=R00', 'R02=R00',
'R11=R00', 'R10=R00', 'C11=C10', 'Rf2=Rf1',
'Rin=R00'))
symbolic_sim = ahkab.new_symbolic(ac_enable=True, subs=subs, outfile='svf_biquad')
ac_sim = ahkab.new_ac(start=0.1, stop=100e6, points=1000, x0=None, outfile='svf_biquad')
testbench = testing.APITest('svf_biquad', mycircuit, [symbolic_sim, ac_sim],
skip_on_travis=True, er=1e-3, ea=1e-5)
testbench.setUp()
testbench.test()
if cli:
r = ahkab.run(mycircuit, [symbolic_sim, ac_sim])
E = r['symbolic'][0].as_symbol('E1')
out_hp = sympy.limit(r['symbolic'][0]['VU1o'], E, sympy.oo, '+')
out_bp = sympy.limit(r['symbolic'][0]['VU2o'], E, sympy.oo, '+')
out_lp = sympy.limit(r['symbolic'][0]['VU3o'], E, sympy.oo, '+')
out_hp = out_hp.simplify()
out_bp = out_bp.simplify()
out_lp = out_lp.simplify()
print("VU1o =", out_hp)
print("VU2o =", out_bp)
print("VU3o =", out_lp)
w = sympy.Symbol('w')
out_hp = out_hp.subs({r['symbolic'][0].as_symbol('RF1'):10e3,
r['symbolic'][0].as_symbol('C10'):15e-9,
r['symbolic'][0].as_symbol('V1'):1,
r['symbolic'][0].as_symbol('s'):1j*w,
})
out_bp = out_bp.subs({r['symbolic'][0].as_symbol('RF1'):10e3,
r['symbolic'][0].as_symbol('C10'):15e-9,
r['symbolic'][0].as_symbol('V1'):1,
r['symbolic'][0].as_symbol('s'):1j*w,
})
out_lp = out_lp.subs({r['symbolic'][0].as_symbol('RF1'):10e3,
r['symbolic'][0].as_symbol('C10'):15e-9,
r['symbolic'][0].as_symbol('V1'):1,
r['symbolic'][0].as_symbol('s'):1j*w,
})
out_lp = sympy.lambdify((w,), out_lp, modules='numpy')
out_bp = sympy.lambdify((w,), out_bp, modules='numpy')
out_hp = sympy.lambdify((w,), out_hp, modules='numpy')
ws = r['ac']['w'][::30]
fig = plt.figure()
plt.title(mycircuit.title)
plt.subplot(211)
plt.hold(True)
plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU1o'])), label="HP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU2o'])), label="BP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU3o'])), label="LP output (AC)")
plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_hp(ws))), 'v', label="HP output (SYMB)")
plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_bp(ws))), 'v', label="BP output (SYMB)")
plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_lp(ws))), 'v', label="LP output (SYMB)")
plt.hold(False)
plt.grid(True)
plt.legend()
plt.ylabel('Magnitude [dB]')
plt.xlabel('Frequency [Hz]')
plt.subplot(212)
plt.hold(True)
plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU1o']), label="HP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU2o']), label="BP output (AC)")
plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU3o']), label="LP output (AC)")
plt.semilogx(ws/2./np.pi, np.angle(out_hp(ws)), 'v', label="HP output (SYMB)")
plt.semilogx(ws/2./np.pi, np.angle(out_bp(ws)), 'v', label="BP output (SYMB)")
plt.semilogx(ws/2./np.pi, np.angle(out_lp(ws)), 'v', label="LP output (SYMB)")
plt.legend()
plt.hold(False)
plt.grid(True)
#plt.ylim([0,1.2])
plt.ylabel('Phase [rad]')
plt.xlabel('Frequency [Hz]')
fig.savefig('ac_plot.png')
else:
testbench.tearDown()
ar("R2", "U3o", "U1n", 10e3)
ar("R4", "U1o", "U2n", 10e3)
ar("R5", "U2o", "U3n", 10e3)
ar("R6", "U3n", "U3o", 10e3)
ac("C1", "U1n", "U1o", 15e-9)
ac("C2", "U2n", "U2o", 15e-9)
ao("E1", gnd, "U1n")
ao("E2", gnd, "U2n")
ao("E3", gnd, "U3n")
buildsvf(mycircuit)
mycircuit.add_vsource("V1", n1="in", n2=gnd, dc_value=5, ac_value=1)
print(mycircuit)
ac_sim = new_ac(start=0.1, stop=100e6, points=1000, x0=None)
try:
r = pickle.load(open("results-ttb.pk"))
except:
subs = symbolic.parse_substitutions(('R2=R1', 'R3=R1', 'C2=C1',
'E2=E1', 'E3=E1', "R4=R1",
"R5=R1", "R6=R1"))
symbolic_sim = ahkab.new_symbolic(ac_enable=True, source=None,
subs=subs)
ahkab.queue(symbolic_sim)
r = ahkab.run(mycircuit)
pickle.dump(r, open("results-ttb.pk", "wb"))
ahkab.queue(ac_sim)
r.update(ahkab.run(mycircuit))
acvalue = m.rect(float(values[3]), Rad(float(values[4])))
mycircuit.add_isource(values[0],
values[1],
values[2],
dc_value=0,
ac_value=acvalue) #dc should not be zero?
if values[0][0] == 'C':
mycircuit.add_capacitor(values[0], values[1], values[2],
float(values[3]))
if values[0][0] == 'L':
mycircuit.add_inductor(values[0], values[1], values[2],
float(values[3]))
if values[0][0] == 'R':
mycircuit.add_resistor(values[0], values[1], values[2],
float(values[3]))
ac = new_ac(start=w, stop=w, points=2, x0=None)
res = run(mycircuit, ac)
#saving result in a file
f = open("result.txt", "w")
for result in res['ac'].keys():
f.write(str(result) + "=")
f.write(str(res['ac'][result][0]))
f.write('\n')
#storing nodes voltages:
voltage = [0 + 0j]
for x in res['ac'].keys():
if x[0] == 'V':
voltage.append(res['ac'][x][0])
#calculating power in each component:
cirfile = open(filename, "r")
impedance_z = complex(1, 0)
def score_ota(self, Indiv):
# Use physical values for Width, Length and Resistance in Si Units
minimalW = 1e-6
minimalL = 10e-9
minimalR = 10
W=(Indiv.gene_value('W1')+1)*minimalW
L=(Indiv.gene_value('L1')+1)*minimalL
R=(Indiv.gene_value('R1')+1)*minimalR
## Couple with spice simulator and extract GBW
# Create new circuit
ota = circuit.Circuit(title="Operational Transconductance Amplifier Circuit")
# Reference ground
gnd = ota.get_ground_node()
n1 = ota.create_node('n1') # Top of current source
n2 = ota.create_node('n2') # Output-, Drain of MOS1 (left)
n3 = ota.create_node('n3') # Output+, Drain of MOS2 (right)
n4 = ota.create_node('n4') # Power supply
n5 = ota.create_node('n5') # Bias of gate +
n6 = ota.create_node('n6') # Bias of gate -
print 'variables'
print W
print L
print R
ota.add_resistor("R1", 'n4', 'n2', value=R)
ota.add_resistor("R2", 'n4', 'n3', value=R)
ota.add_capacitor('c1', n1='n2', n2=gnd, value=5e-12)
ota.add_capacitor('c2', n1='n3', n2=gnd, value=5e-12)
ota.add_model('ekv', 'nmos', dict(TYPE='n', VTO=.4, KP=10e-6))
ota.add_mos('m1', nd='n2', ng='n5', ns='n1', nb=gnd, model_label='nmos', w=W, l=L)
ota.add_mos('m2', nd='n3', ng='n6', ns='n1', nb=gnd, model_label='nmos', w=W, l=L)
Vac = 0.02
ota.add_vsource("V1", n1="n5", n2=gnd, dc_value=0.5, ac_value=Vac)
ota.add_vsource("V2", n1="n6", n2=gnd, dc_value=0.5, ac_value=-Vac)
ota.add_vsource("V3", n1="n4", n2=gnd, dc_value=2, ac_value=0)
ota.add_isource('ib', n1='n1', n2=gnd, dc_value=1e-3)
ac_analysis = ahkab.new_ac(start=1e6, stop=1e10, points=10)
r = ahkab.run(ota, ac_analysis)
Output = np.abs(r['ac']['VN3']-r['ac']['VN2'])
## Gain calculation
Gain = Output[2]/Vac
score = Gain
## Bandwidth calculation
# Normalize the output to the low frequency value and convert to array
norm_out = np.abs(Output)/np.abs(Output).max()
# Convert to dB
#norm_out_db = 20*np.log10(norm_out)
# Convert angular frequencies to Hz and convert matrix to array
frequencies = r['ac']['f']
#print r['ac'].keys()
print norm_out
print frequencies
# call scipy to interpolate
x1 = norm_out
y1 = frequencies
# Combine lists into list of tuples
points = zip(x1, y1)
# Sort list of tuples by x-value
points = sorted(points, key=lambda point: point[0])
# Split list of tuples into two list of x values any y values
x1, y1 = zip(*points)
frequencies_interpolated = interpolate.interp1d(x1, y1)
if 0.5 > min(x1):
print frequencies_interpolated(0.5)
Bandwidth = frequencies_interpolated(0.5)
else:
Bandwith = 0
score = Gain*Bandwidth
print score
return score
1e6)
ao("u1", "u1p", "u1o")
ar("R1", "in", "nR2", 10e3)
ar("R2", "nR2", "u1p", 10e3)
ac("C1", "u1o", "nR2", 1e-9)
ac("C2", "u1p", gnd, 1e-9)
av("V1", "in", gnd, 2.5, 1.0)
buildsk(mycircuit)
print(mycircuit)
symbolic_sim = ahkab.new_symbolic(ac_enable=True, source='V1')
ac_sim = ahkab.new_ac(start=10, stop=100e6, points=1000, x0=None)
try:
r = pickle.load(open("results-sallenkey.pk"))
except:
ahkab.queue(ac_sim, symbolic_sim)
r = ahkab.run(mycircuit)
pickle.dump(r, open("results-sallenkey.pk", "wb"))
print r['symbolic'][0]
print "Symbolic transfer functions:"
printing.print_symbolic_transfer_functions(r['symbolic'][1])
# substitute the actual values to the symbols and plot
V1 = r['symbolic'][0].as_symbol('V1')
tf = r['symbolic'][0]['Vu1o'] / V1
sn.append(n1)
en.append(n2)
elif (words[0][0]=='F'):
e_ip = words[0]
n1 = words[1]
n2 = words[2]
v= words[3]
value = float(words[4])
ac_circuit.add_cccs(e_ip, n1, n2, id(v),value)
sympols.append(e_ip)
impedence.append(0)
sn.append(n1)
en.append(n2)
ac = ahkab.new_ac(start=freq, stop=freq, points=0,x0=None)
res = ahkab.run(ac_circuit, ac)
print(res['ac'].keys())
def check_v(e,n):
if(e[n]=='0'):
return 0
else:
v = res['ac']['V{}'.format(e[n])]
return v
for l in range(len(sympols)):
if(sympols[l][0]=='R'):
ElemID.append(Inputs[3])
VsID.append('V' + str(ccvsBatteryCount))
ccvsBatteryCount += 1
if (len(Inputs) == 6):
i = 0
if LINE[0][0] == 'V':
Circuit.add_ccvs(Inputs[0], Inputs[1], Inputs[2], LINE[0], float(Inputs[4]))
else:
while (i < len(ElemID)):
if (ElemID[i] == Inputs[3]):
Circuit.add_ccvs(Inputs[0], Inputs[1], Inputs[2], VsID[i],
float(Inputs[4]))
i += 1
File.close()
ac = ahkab.new_ac(start=frequency, stop=frequency, points=2, x0=None)
solution = ahkab.run(Circuit, ac)
########################################################################################################################
PowerList = []
File = open(NetlistName + ".txt", "r")
Lines = File.readlines()
File.close()
File = open(NetlistName + ".txt", "r")
ResultFile = open("OutputFile.txt", 'w')
for line in File:
Element = line.split()
if len(Element) > 0:
if Element[0][0] == 'R':
if Element[2] != '0' and Element[1] != '0':