def create_test_circuit(fet_type, iparam, fet_L, fet_W, coner_path):
c = Circuit('gm_id')
c.include(
'/home/tclarke/skywater-pdk/libraries/sky130_fd_pr/latest/models/corners/tt.spice'
)
fet_L = 0.15
fet_W = 1
# create the circuit
c.V('gg', 1, c.gnd, 0 @ u_V)
c.V('dd', 2, c.gnd, 1.8 @ u_V)
c.X('M1',
fet_type,
2,
1,
c.gnd,
c.gnd,
L=fet_L,
W=fet_W,
ad="'W*0.29'",
pd="'2*(W+0.29)'",
as_="'W*0.29'",
ps="'2*(W+0.29)'",
nrd="'0.29/W'",
nrs="'0.29/W'",
sa=0,
sb=0,
sd=0,
nf=1,
mult=1)
return c
def create_circuit(genome, config):
libraries_path = '/home/alan/ngspice/libraries' # os.path.join(os.path.dirname(os.path.dirname(__file__)), 'libraries')
spice_library = SpiceLibrary(libraries_path)
circuit = Circuit('NEAT')
circuit.include(spice_library['1N4148'])
Vbase = circuit.V('base', 'input1', circuit.gnd, 2)
Vcc = circuit.V('cc', 'input2', circuit.gnd, 5)
Vgnd = circuit.V('gnd', 'input3', circuit.gnd, 0)
#circuit.R('test1', 'node0', circuit.gnd, 1e6)
#circuit.R('test2', 'node0', 'input1', 1e6)
ridx = 1
xidx = 1
for key, c in iteritems(genome.connections):
if c.component == 'resistor':
pin0, pin1 = get_pins(key)
R = 10**c.value
circuit.R(ridx, pin1, pin0, R)
ridx += 1
elif c.component == 'diode':
pin0, pin1 = get_pins(key)
circuit.X(xidx, '1N4148', pin1, pin0)
xidx += 1
return circuit
def nmos_characteristics(Vd, Vg):
circuit = Circuit('NMOS Input Characteristic')
circuit.include(
'./app/circuits/libraries/transistor/ptm_65nm_nmos_bulk.mod')
# Define the DC supply voltage value
Vdd = float(Vd)
# Instanciate circuit elements
Vgate = circuit.V('gate', 'gatenode', circuit.gnd, u_V(float(Vg)))
Vdrain = circuit.V('drain', 'vdd', circuit.gnd, u_V(Vdd))
# M <name> <drain node> <gate node> <source node> <bulk/substrate node>
circuit.MOSFET(1,
'vdd',
'gatenode',
circuit.gnd,
circuit.gnd,
model='ptm65nm_nmos')
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.dc(Vdrain=slice(0, Vdd, .01))
figure, ax = plt.subplots(figsize=(20, 10))
ax.plot(analysis['vdd'], u_A(-analysis.Vdrain))
ax.legend('NMOS characteristic')
ax.grid()
ax.set_xlabel('Vds [V]')
ax.set_ylabel('Id [A]')
return circuit, analysis, plt
def simulate_attenuation_factor_core(w, R_1, R_2, C_1, C_2, optboolean=False):
circuit = Circuit('Name me please')
circuit.include(spice_library['D1N4148'])
# TLV3201 is a 0-5 T.I. OpAmp
circuit.include(spice_library['LM741'])
V = 7
#w = 20E3
#circuit.V('1', circuit.gnd,1,f'DC 0 AC {V} SIN(0 {V} {w})')
circuit.V('1', 1, circuit.gnd, f'DC 0 AC {V} SIN(0 {V} {w})')
#R_1 = 11.2
#R_2 = 11.2
R_A = 100000
R_B = 0.001
#C_1 = 2000
#C_2 = 1000
links = [
(1, 2),
(2, 3),
(circuit.gnd, 4),
(4, 5),
]
R_vector = [
R_1,
R_2,
R_A,
R_B,
]
for x in range(len(R_vector)):
circuit.R(str(x + 1), links[x][0], links[x][1], R_vector[x] @ u_kΩ)
circuit.C('1', 2, 5, C_1 @ u_pF)
circuit.C('2', circuit.gnd, 3, C_2 @ u_pF)
circuit.X('opamp', 'LM741', 3, 4, 'Vcc', 'Vee', 5)
circuit.V('2', 'Vcc', circuit.gnd, 'DC +15')
circuit.V('3', 'Vee', circuit.gnd, 'DC -15')
if optboolean:
circuit.X('diodus', 'D1N4148', 2, 1)
f = w
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=((1 / f) / 10) @ u_s,
end_time=(4 / f) @ u_s) # Printer?
if False:
#print(str(circuit))
fig = plt.figure(figsize=(20, 4)) # create a figure object
ax = fig.add_subplot(1, 1, 1)
plt.plot(analysis['1'] - analysis['2'], label='R')
plt.plot(analysis['2'] - analysis['3'], label='L')
ax.plot(analysis['3'], label='C')
#ax.set_ylim(-int(V*1.1)-10,int(V*1.1)+10)
ax.legend()
ax.set_title(f'freq : {w}')
print(f'resonance was at {np.sqrt(1/(L*C))}')
if True:
outputter = max(analysis['5'])
del (circuit)
return outputter
return
def simple_bjt_amp():
circuit = Circuit('test circuit')
model_npn = set_model_qbc847b(circuit)
n = NodeNames('n1', 'n2', 'n3', 'n4', 'n5')
gnd = 0
circuit.R('1', n.n3, n.n2, 2.2e6)
circuit.Q('1', n.n3, n.n2, gnd, model=model_npn)
circuit.R('3', n.n1, n.n3, 1e3)
circuit.C('1', n.n4, n.n2, 100e-9)
circuit.C('2', n.n3, n.n5, 1e-6)
circuit.C('4', n.n1, n.n3, 10e-9)
circuit.R('5', n.n5, gnd, 10e3)
circuit.V('pwr', n.n1, gnd, 6)
circuit.V('in', n.n4, gnd, 'dc 0 ac 1 distof1 1 distof2 0.1')
return circuit, n
def test_ground_node(self):
circuit = Circuit('')
circuit.V('input', 'in', circuit.gnd, '10V')
circuit.R(1, 'in', 'out', 9 @ u_kΩ)
circuit.R(2, 'out', circuit.gnd, 1 @ u_kΩ)
self.assertTrue(circuit.has_ground_node())
circuit = Circuit('')
circuit.V('input', 'in', 'fake_ground', '10V')
circuit.R(1, 'in', 'out', 9 @ u_kΩ)
circuit.R(2, 'out', 'fake_ground', 1 @ u_kΩ)
self.assertFalse(circuit.has_ground_node())
def createCircuit(filter1o, filter2o):
circuit = Circuit('Filter')
circuit.include('Models/BasicOpamp.cir')
circuit.include('Models/AD8619.cir')
circuit.include('Models/TL084.cir')
circuit.subcircuit(filter1o)
circuit.subcircuit(filter2o)
circuit.V('1', '5V', circuit.gnd, '5')
circuit.V('2', 'VRef', circuit.gnd, '2.5')
circuit.SinusoidalVoltageSource('In', 'In', 'VRef', amplitude=1)
circuit.X('1', filter1o.name, 'In', 'out1o', 'VRef', '5V', circuit.gnd)
circuit.X('2', filter2o.name, 'In', 'out2o', 'VRef', '5V', circuit.gnd)
print(circuit)
return circuit
def simulate_RLC(w=2000,V=2,R=10,L=3,C=320,**kwargs):
circuit = Circuit('Name me please')
circuit.R('1', 1, 2,R@u_kΩ)
circuit.L('1', 2, 3,L@u_H)
circuit.C('1', 3, 0,C@u_nF)
#circuit.V('1', circuit.gnd,1 ,f'SIN(0 {V} {w})')
circuit.V('1',0,1, f'DC 0 AC {V} SIN(0 {V} {w})')
dt = 2*np.pi/w*4
tf = 5/w
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
#analysis = simulator.transient(step_time=0.1@u_ms, end_time=tf@u_s)
analysis = simulator.transient(step_time=dt@u_ms, end_time=tf@u_s)
if kwargs.get('view',False):
#print(str(circuit))
fig = plt.figure(figsize=(20,4)) # create a figure object
ax = fig.add_subplot(1, 1, 1)
plt.plot(analysis['1']-analysis['2'],label='R')
plt.plot(analysis['2']-analysis['3'],label='L')
ax.plot(analysis['3'],label='C')
#ax.set_ylim(-int(V*1.1)-10,int(V*1.1)+10)
ax.legend()
ax.set_title(f'freq : {w}, voltage: {V}')
ax.set_xlabel('time (ms)')
ax.set_ylabel('current (ma)')
plt.savefig('gallery/RLC_example.png')
print(f'resonance was at {np.sqrt(1/(L*C))}')
return max(abs(analysis['1']-analysis['2']))/R
def test_spinit(self):
from PySpice.Spice.Netlist import Circuit
import PySpice.Unit as U
circuit = Circuit('Astable Multivibrator')
source = circuit.V('cc', 'vcc', circuit.gnd, 15 @ U.u_V)
circuit.R(1, 'output', 'comparator', 1 @ U.u_kΩ)
circuit.C(1, 'comparator', circuit.gnd, 100 @ U.u_nF)
circuit.R(2, 'output', 'reference', 100 @ U.u_kΩ)
circuit.R(3, 'vcc', 'reference', 100 @ U.u_kΩ)
circuit.R(4, 'reference', circuit.gnd, 100 @ U.u_kΩ)
circuit.NonLinearVoltageSource(1,
'output',
circuit.gnd,
expression='V(reference, comparator)',
table=((-U.micro(1), 0),
(U.micro(1), source.dc_value)))
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
simulator.initial_condition(
comparator=0) # Fixme: simulator.nodes.comparator == 0
analysis = simulator.transient(step_time=1 @ U.u_us,
end_time=500 @ U.u_us)
if (len(analysis.output)) < 500:
raise NameError('Simualtion failed')
def test_spinit(self):
from PySpice.Spice.Netlist import Circuit
import PySpice.Unit as U
circuit = Circuit('Test')
# Fixme: On Windows
# Supplies reduced to 2.5749% Supplies reduced to 1.7100% Warning: source stepping failed
# doAnalyses: Too many iterations without convergence
source = circuit.V('cc', 'vcc', circuit.gnd, 15 @ U.u_V)
circuit.R(1, 'output', 'comparator', 1 @ U.u_kΩ)
circuit.C(1, 'comparator', circuit.gnd, 100 @ U.u_nF)
circuit.R(2, 'output', 'reference', 100 @ U.u_kΩ)
circuit.R(3, 'vcc', 'reference', 100 @ U.u_kΩ)
circuit.R(4, 'reference', circuit.gnd, 100 @ U.u_kΩ)
# circuit.NonLinearVoltageSource(1, 'output', circuit.gnd,
# expression='V(reference, comparator)',
# table=((-U.micro(1), 0),
# (U.micro(1), source.dc_value))
# )
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
simulator.initial_condition(
comparator=0) # Fixme: simulator.nodes.comparator == 0
analysis = simulator.transient(step_time=1 @ U.u_us,
end_time=500 @ U.u_us)
if (len(analysis.output)) < 500:
raise NameError('Simualtion failed')
def make_database_core(w, V, R_1, R_2, C_1, C_2, ax=False):
circuit = Circuit('Sallen-key low-pass-filter')
circuit.include(spice_library['D1N4148'])
circuit.include(spice_library['LM741'])
circuit.V('1', 1, circuit.gnd, f'DC 0 AC {V} SIN(0 {V} {w})')
R_A = 100000
R_B = 0.001
links = [
(1, 2),
(2, 3),
(circuit.gnd, 4),
(4, 5),
]
R_vector = [
R_1,
R_2,
R_A,
R_B,
]
for x in range(len(R_vector)):
circuit.R(str(x + 1), links[x][0], links[x][1], R_vector[x] @ u_kΩ)
circuit.C('1', 2, 5, C_1 @ u_pF)
circuit.C('2', circuit.gnd, 3, C_2 @ u_pF)
circuit.X('opamp', 'LM741', 3, 4, 'Vcc', 'Vee', 5)
circuit.V('2', 'Vcc', circuit.gnd, 'DC +15')
circuit.V('3', 'Vee', circuit.gnd, 'DC -15')
circuit.X('diodus', 'D1N4148', 2, 1)
f = w
tf = 3 / w
t0 = 1
treshold = 4
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=((1 / f) / 10) @ u_s,
end_time=3 / w @ u_s)
if False:
ax.plot(analysis['5'], label='output')
ax.plot(analysis['1'], label='input')
ax.plot(analysis['1'] - analysis['2'], label='diodo')
ax.hlines(4, 0, 5 / w)
ax.legend()
ax.set_title(
f'R1: {R_1}, R2: {R_2}, C1: {C_1}, C2: {C_2}, V: {V}, W: {w}')
ax.set_ylim(-15, 15)
auxiliar = analysis['2'] - analysis['1']
del (circuit)
return [w, V, R_1, R_2, C_1, C_2, int(float(max(auxiliar)) > treshold)]
def simulate_amplification_factor_core(R1,R2,RC,RE,RL,C1,C2,V,w):
circuit = Circuit('Amplifier')
circuit.R(1, 5, 2, R1@u_kΩ) #kOhm
circuit.R(2, 2, 0, R2@u_kΩ) #kOhm
circuit.R('C', 5, 4, RC@u_kΩ) #kOhm
circuit.R('E', 3, 0, RE@u_kΩ) #kOhm
circuit.R('Load', 'out', 0, RL@u_MΩ) #MOhm
circuit.C(1, 'inp', 2, C1@u_uF) #uF
circuit.C(2, 4, 'out', C2@u_uF) #uF
circuit.BJT(1, 4, 2, 3, model='bjt') # Q is mapped to BJT !
circuit.model('bjt', 'npn', bf=80, cjc=pico(5), rb=100)
circuit.V('power', 5, circuit.gnd, 15@u_V)
circuit.V('var','inp',circuit.gnd, f'DC 0 AC {V} SIN(0 {V}V {w})')
T = 25
simulator = circuit.simulator(temperature=T, nominal_temperature=T)
analysis = simulator.transient(step_time = (2*np.pi/w/20)@u_s,end_time=(2*np.pi/w*4)@u_s)
return [float(min(analysis['out']))]
def simulate_amplifier():
circuit = Circuit('Amplifier')
R_1 = [100]
R_2 = [20]
R_C = [10]
R_E = [2]
R_L = [1]
C_1 = [10]
C_2 = [10]
R1 = random.choice(R_1)
R2 = random.choice(R_2)
RC = random.choice(R_C)
RE = random.choice(R_E)
RL = random.choice(R_L)
C1 = random.choice(C_1)
C2 = random.choice(C_2)
circuit.R(1, 5, 2, R1@u_kΩ) #kOhm
circuit.R(2, 2, 0, R2@u_kΩ) #kOhm
circuit.R('C', 5, 4, RC@u_kΩ) #kOhm
circuit.R('E', 3, 0, RE@u_kΩ) #kOhm
circuit.R('Load', 'out', 0, RL@u_MΩ) #MOhm
circuit.C(1, 'in', 2, C1@u_uF) #uF
circuit.C(2, 4, 'out', C2@u_uF) #uF
circuit.BJT(1, 4, 2, 3, model='bjt') # Q is mapped to BJT !
circuit.model('bjt', 'npn', bf=80, cjc=pico(5), rb=100)
V_vector = [0.5]
w_vector = [1E3]
V = random.choice(V_vector)
w = random.choice(w_vector)
circuit.V('power', 5, circuit.gnd, 15@u_V)
circuit.V('var','in',circuit.gnd, f'DC 0 AC {V} SIN(0 {V}V {w})')
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time = (1/w/25)@u_s,end_time=(4/w)@u_s)
figure = plt.figure(1, (20, 10))
axe = plt.subplot(111)
plt.title('')
plt.xlabel('Time [s]')
plt.ylabel('Voltage [V]')
plt.grid()
plot(analysis['in'], axis=axe)
plot(analysis.out, axis=axe)
plt.legend(('input', 'output'), loc=(.05,.1))
plt.tight_layout()
plt.savefig('gallery/amplifier.png')
return
def simulate_sallen_key_low_pass_filter():
# Initialize the Circuit
circuit = Circuit('Sallen-key low-pass-filter')
# Include the active element: operational amplifier
circuit.include(spice_library['LM741'])
V = 2
w = 2E3
circuit.V('1', 1, circuit.gnd, f'DC 0 AC {V} SIN(0 {V} {w})')
R_1 = 11.2
R_2 = 11.2
R_A = 1000
R_B = 0.01
C_1 = 200
C_2 = 100
links = [
(1, 2),
(2, 3),
(circuit.gnd, 4),
(4, 5),
]
R_vector = [
R_1,
R_2,
R_A,
R_B,
]
for x in range(len(R_vector)):
circuit.R(str(x + 1), links[x][0], links[x][1], R_vector[x] @ u_kΩ)
circuit.C('1', 2, 5, C_1 @ u_pF)
circuit.C('2', circuit.gnd, 3, C_2 @ u_pF)
circuit.X('opamp', 'LM741', 3, 4, 'Vcc', 'Vee', 5)
circuit.V('2', 'Vcc', circuit.gnd, 'DC +15')
circuit.V('3', 'Vee', circuit.gnd, 'DC -15')
f = w
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=((1 / f) / 10) @ u_s,
end_time=(4 / f) @ u_s)
fig, ax = plt.subplots(figsize=(20, 5))
ax.plot(analysis['5'], label='out')
ax.plot(analysis['1'], label='in')
ax.legend()
plt.savefig('gallery/sallen-key-low-pass-filter_example.png')
def voltage_divider(v, r1, r2):
circuit = Circuit('Voltage Divider')
circuit.V('input', 1, circuit.gnd, u_V(float(v)))
circuit.R(1, 1, 2, u_kOhm(float(r1)))
circuit.R(2, 2, circuit.gnd, u_kOhm(float(r2)))
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.operating_point()
output = {}
for node in analysis.nodes.values():
output[str(node)] = str(round(float(node), 2)) + "V"
return circuit, analysis, output
def make_database_core(R1,R2,RC,RE,RL,C1,C2,V,w,l=False):
circuit = Circuit('Amplifier')
circuit.R(1, 5, 2, R1@u_kΩ) #kOhm
circuit.R(2, 2, 0, R2@u_kΩ) #kOhm
circuit.R('C', 5, 4, RC@u_kΩ) #kOhm
circuit.R('E', 3, 0, RE@u_kΩ) #kOhm
circuit.R('Load', 'out', 0, RL@u_MΩ) #MOhm
circuit.C(1, 'inp', 2, C1@u_uF) #uF
circuit.C(2, 4, 'out', C2@u_uF) #uF
circuit.BJT(1, 4, 2, 3, model='bjt') # Q mapped to BJT
circuit.model('bjt', 'npn', bf=80, cjc=pico(5), rb=100)
circuit.V('power', 5, circuit.gnd, 15@u_V)
circuit.V('var','inp',circuit.gnd, f'DC 0 AC {V} SIN(0 {V}V {w})')
circuit.include(spice_library['D1N4148'])
circuit.X('diode','D1N4148',3,2)
T = 25
simulator = circuit.simulator(temperature=T, nominal_temperature=T)
analysis = simulator.transient(step_time = (1/w/10)@u_s,end_time=(2/w)@u_s)
treshold = 4
return [R1,R2,RC,RE,RL,C1,C2,V,w,
int(treshold<float(max(analysis['3']-analysis['2'])))]
def setup_circuit(kind="biased"):
if kind=="biased":
circuit = Circuit('Biased Envelope Circuit')
circuit.include(spice_library['hsms'])
circuit.V('in', 'input', circuit.gnd, 'dc 0 external')
# bias portion
circuit.C(2, 'input', 1, 10@u_nF)
circuit.R(2, 1, 2, 1@u_kOhm)
circuit.X('D2', 'hsms', 2, circuit.gnd)
circuit.R(3, 2, 'bias', 1@u_kOhm)
circuit.V('bias', 'bias', circuit.gnd, 5@u_V)
# envelope portion
circuit.X('D1', 'hsms', 1, 'output')
circuit.C(1, 'output', circuit.gnd, 220@u_pF)
circuit.R(1, 'output', circuit.gnd, 50@u_Ohm)
return circuit
elif kind=="basic":
circuit = Circuit('Biased Envelope Circuit')
circuit.include(spice_library['hsms'])
circuit.V('in', 'input', circuit.gnd, 'dc 0 external')
# envelope portion
circuit.X('D1', 'hsms', 'input', 'output')
circuit.C(1, 'output', circuit.gnd, 220@u_pF)
circuit.R(1, 'output', circuit.gnd, 50@u_Ohm)
return circuit
elif kind=="diode":
circuit = Circuit('Diode Output')
circuit.include(spice_library['hsms'])
circuit.V('in', 'input', circuit.gnd, 'dc 0 external')
circuit.X('D1', 'hsms', 'input', 'output')
return circuit
def simulate_attenuation_factor_core(w, V, R, C):
circuit = Circuit('RC low-pass filter')
fc = 1 / 2 / 3.14 / (R * 1000) / (C * 1E-9)
circuit.V('1', 1, circuit.gnd, f'DC 0 AC {V} SIN(0 {V} {w})')
circuit.R('1', 1, 2, R @ u_kΩ)
circuit.C('1', 2, circuit.gnd, C @ u_nF)
f = w / 2 / np.pi
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=((1 / f) / 10) @ u_s,
end_time=(4 / f) @ u_s)
if True:
outputter = max(analysis['2'])
del (circuit)
return outputter
return
def make_database_core(w=2000,V=12,R=10,L=3,C=320):
threshold = 4
circuit = Circuit('RLC-series')
circuit.V('1',0,1, f'DC 0 AC {V} SIN(0 {V} {w})')
circuit.R('1', 1, 2,R@u_kΩ)
circuit.L('1', 2, 3,L@u_H)
circuit.X('diodus','D1N4148', 2, 3)
circuit.include(spice_library['D1N4148'])
circuit.C('1', 3, 0,C@u_nF)
dt = 2*np.pi/w*4
tau = 2*np.pi/w*4
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=dt@u_ms, end_time=tau@u_s)
auxiliar = analysis['2']-analysis['3']
return [w,V,R,L,C,int(float(max(auxiliar))>threshold)]
def test_raw_spice(self):
spice_declaration = """
.title Voltage Divider
R2 out 0 1kOhm
vinput in 0 10v
r1 in out 9kohm
"""
# .end
circuit = Circuit('Voltage Divider')
circuit.V('input', 'in', circuit.gnd, '10V')
circuit.R(1, 'in', 'out', raw_spice='9kOhm')
circuit.raw_spice += 'R2 out 0 1kOhm'
self._test_spice_declaration(circuit, spice_declaration)
def skip_test_resistance(
self): # this test works, it just doesn't run on Travis yet.
Rexe = 0.0000001
Rexc = 0.0000001
Rwe = 0.2545383947014702
Rwke = 0.7943030881649811
Rv = 8.852701208752846e-06
Rintere = 0.00034794562965549745
Rinterc = 0.00017397281482774872
Rwkc = 0.39715154408249054
Rwka = 744.3007160198263
Rwa = 456.90414284754644
Rwc = 0.1272691973507351
circuit = PyCircuit('HeatPipe')
circuit.V('input', 1, circuit.gnd, 80 @ u_V)
circuit.R('Reex', 1, 2, 0.0000001 @ u_kΩ)
circuit.R('Rew', 2, 3, 0.2545383947014702 @ u_kΩ)
circuit.R('Rewk', 3, 4, 0.7943030881649811 @ u_kΩ)
circuit.R('Rintere', 4, 5, 0.00034794562965549745 @ u_kΩ)
circuit.R('Raw', 2, 9, 456.90414284754644 @ u_kΩ)
circuit.R('Rawk', 3, 8, 744.3007160198263 @ u_kΩ)
circuit.R('Rv', 5, 6, 8.852701208752846e-06 @ u_kΩ)
circuit.R('Rinterc', 6, 7, 0.00017397281482774872 @ u_kΩ)
circuit.R('Rcwk', 7, 8, 0.39715154408249054 @ u_kΩ)
circuit.R('Rcw', 8, 9, 0.1272691973507351 @ u_kΩ)
circuit.R('Rcex', 9, circuit.gnd, 0.0000001 @ u_kΩ)
for resistance in (circuit.RReex, circuit.RRcex):
resistance.minus.add_current_probe(
circuit) # to get positive value
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.operating_point()
for node in analysis.nodes.values():
print('Node {}: {:5.2f} V'.format(
str(node), float(node))) # Fixme: format value + unit
#Pyspice treates ground as 0, need to offset by base temperature (circ.Rex_c.T_out = 20degC)
assert_near_equal(self.prob.get_val('circ.n3.T'),
float(analysis.nodes['4']) + 20.,
tolerance=1.0E-5)
def make_database_core(w, V, R, C):
circuit = Circuit('RC low-pass filter')
# Include non-passive elements:
# D1N4148 is a (regular&cheap) Diode
circuit.include(spice_library['D1N4148'])
fc = 1 / 2 / 3.14 / (R * 1000) / (C * 1E-9) # Cut Frequency!
circuit.V('1', 1, circuit.gnd, f'DC 0 AC {V} SIN(0 {V} {w})')
circuit.R('1', 1, 2, R @ u_kΩ)
circuit.C('1', 2, circuit.gnd, C @ u_nF)
circuit.X('diodus', 'D1N4148', 2, circuit.gnd)
f = w
treshold = 4
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=((1 / f) / 10) @ u_s,
end_time=(4 / f) @ u_s)
outputter = int(float(max(-analysis['2'])) > treshold)
del (circuit)
return [w, V, R, C, outputter]
def test_basic(self):
spice_declaration = """
.title Voltage Divider
vinput in 0 10v
r1 in out 9kohm
r2 out 0 1kohm
"""
# .end
circuit = Circuit('Voltage Divider')
circuit.V('input', 'in', circuit.gnd, '10V')
circuit.R(1, 'in', 'out', 9 @ u_kΩ)
circuit.R(2, circuit['out'], circuit.gnd,
1 @ u_kΩ) # out node is defined
self._test_spice_declaration(circuit, spice_declaration)
circuit = VoltageDividerCircuit()
self._test_spice_declaration(circuit, spice_declaration)
self._test_nodes(circuit, (0, 'in', 'out'))
self.assertTrue(circuit['R1'].minus.node is circuit['out'])
self.assertEqual(str(circuit['R1'].plus.node), 'in')
self.assertEqual(str(circuit['R1'].minus.node), 'out')
self.assertEqual(str(circuit['in']), 'in')
self.assertEqual(str(circuit['out']), 'out')
#self.assertEqual(str(circuit.out), 'out')
# for pin in circuit.out:
# print(pin)
self.assertEqual(circuit['out'].pins,
set((circuit['R1'].minus, circuit['R2'].plus)))
self.assertEqual(circuit['R1'].resistance, 9 @ u_kΩ)
self.assertEqual(circuit['R2'].resistance, 1 @ u_kΩ)
circuit['R1'].resistance = 10 @ u_kΩ
self._test_spice_declaration(circuit,
spice_declaration.replace('9k', '10k'))
def simulate_RC_filter():
# Initialize the Circuit
circuit = Circuit('RC low-pass filter')
# Set the element's values
V = 2
w = 1E3
R = 1
C = 30
fc = 1 / 2 / 3.14 / (R * 1000) / (C * 1E-9)
circuit.V('1', 1, circuit.gnd, f'DC 0 AC {V} SIN(0 {V} {w})')
circuit.R('1', 1, 2, R @ u_kΩ)
circuit.C('1', 2, circuit.gnd, C @ u_nF)
# Simulate
f = w / 2 / np.pi
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.transient(step_time=((1 / f) / 10) @ u_s,
end_time=(4 / f) @ u_s)
fig, ax = plt.subplots(figsize=(20, 5))
ax.plot(analysis['2'], label='out')
ax.plot(analysis['1'], label='in')
ax.legend()
plt.savefig('gallery/RC-low-pass-filter_example.png')
def thread_function(qin, qout, clk_freq, init_x):
try:
c = Circuit('pygears')
ins = []
outs = []
f(c, ins, outs)
c.V('__x', ins[0][0], ins[0][1], f'dc {init_x} external')
ngspice_shared = PgNgSpice(qin,
qout,
x=init_x,
outs=outs,
send_data=True)
simulator = c.simulator(temperature=25,
nominal_temperature=25,
simulator='ngspice-shared',
ngspice_shared=ngspice_shared)
simulator.transient(step_time=1 / (2 * clk_freq), end_time=1e3)
except GearDone:
pass
libraries_path = os.path.join(os.environ['PySpice_examples_path'], 'libraries')
spice_library = SpiceLibrary(libraries_path)
####################################################################################################
#!# For this purpose, we use the common high-speed diode 1N4148. The diode is driven by a variable
#!# voltage source through a limiting current resistance.
#cm# diode-characteristic-curve-circuit.m4
circuit = Circuit('Diode Characteristic Curve')
circuit.include(spice_library['1N4148'])
circuit.V('input', 'in', circuit.gnd, 10 @ u_V)
circuit.R(1, 'in', 'out', 1 @ u_Ω) # not required for simulation
circuit.X('D1', '1N4148', 'out', circuit.gnd)
#!# We simulate the circuit at these temperatures: 0, 25 and 100 °C.
temperatures = [0, 25, 100] @ u_Degree
analyses = {}
for temperature in temperatures:
simulator = circuit.simulator(temperature=temperature,
nominal_temperature=temperature)
analysis = simulator.dc(Vinput=slice(-2, 5, .01))
analyses[float(temperature)] = analysis
####################################################################################################
libraries_path = find_libraries()
spice_library = SpiceLibrary(libraries_path)
####################################################################################################
figure = plt.figure(1, (20, 10))
####################################################################################################
#r# We define a basic circuit to drive an NPN transistor (2n2222a) using two voltage sources.
#f# circuit_macros('transistor.m4')
circuit = Circuit('Transistor')
Vbase = circuit.V('base', '1', circuit.gnd, 1@u_V)
circuit.R('base', 1, 'base', 1@u_kΩ)
Vcollector = circuit.V('collector', '2', circuit.gnd, 0@u_V)
circuit.R('collector', 2, 'collector', 1@u_kΩ)
# circuit.BJT(1, 'collector', 'base', circuit.gnd, model='generic')
# circuit.model('generic', 'npn')
circuit.include(spice_library['2n2222a'])
circuit.BJT(1, 'collector', 'base', circuit.gnd, model='2n2222a')
#r# We plot the base-emitter diode curve :math:`Ib = f(Vbe)` using a DC sweep simulation.
simulator = circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.dc(Vbase=slice(0, 3, .01))
axe1 = plt.subplot(221)
axe1.plot(analysis.base, u_mA(-analysis.Vbase)) # Fixme: I_Vbase
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 *
# from OperationalAmplifier import basic_comparator
####################################################################################################
circuit = Circuit('Astable Multivibrator')
source = circuit.V('cc', 'vcc', circuit.gnd, 15 @ u_V)
# Time constant
circuit.R(1, 'output', 'comparator', 1 @ u_kΩ)
circuit.C(1, 'comparator', circuit.gnd, 100 @ u_nF)
# Reference
circuit.R(2, 'output', 'reference', 100 @ u_kΩ)
circuit.R(3, 'vcc', 'reference', 100 @ u_kΩ)
circuit.R(4, 'reference', circuit.gnd, 100 @ u_kΩ)
# Comparator
# Fixme: ngspice is buggy with such subcircuit
# circuit.subcircuit(basic_comparator)
# circuit.X('comparator', 'BasicComparator', 'reference', 'comparator', 'vcc', circuit.gnd, 'output')
circuit.NonLinearVoltageSource(1,
'output',
circuit.gnd,
expression='V(reference, comparator)',
return 0
##############################################
def get_isrc_data(self, current, time, node, ngspice_id):
self._logger.debug('ngspice_id-{} get_isrc_data @{} node {}'.format(
ngspice_id, time, node))
current[0] = 1.
return 0
####################################################################################################
circuit = Circuit('Voltage Divider')
circuit.V('input', 'input', circuit.gnd, 'dc 0 external')
circuit.R(1, 'input', 'output', 10 @ u_kΩ)
circuit.R(2, 'output', circuit.gnd, 1 @ u_kΩ)
amplitude = 10 @ u_V
frequency = 50 @ u_Hz
ngspice_shared = MyNgSpiceShared(amplitude=amplitude,
frequency=frequency,
send_data=False)
simulator = circuit.simulator(temperature=25,
nominal_temperature=25,
simulator='shared',
ngspice_shared=ngspice_shared)
period = float(frequency.period)
analysis = simulator.transient(step_time=period / 200, end_time=period * 2)
####################################################################################################
import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging()
####################################################################################################
from PySpice.Spice.Netlist import Circuit
from PySpice.Unit import *
####################################################################################################
thevenin_circuit = Circuit('Thévenin Representation')
thevenin_circuit.V('input', 1, thevenin_circuit.gnd, 10 @ u_V)
thevenin_circuit.R('generator', 1, 'load', 10 @ u_Ω)
thevenin_circuit.R('load', 'load', thevenin_circuit.gnd, 1 @ u_kΩ)
simulator = thevenin_circuit.simulator(temperature=25, nominal_temperature=25)
analysis = simulator.operating_point()
load_node = analysis.load
print('Node {}: {:5.2f} V'.format(str(load_node), float(load_node)))
#o#
norton_circuit = Circuit('Norton Representation')
norton_circuit.I(
'input', norton_circuit.gnd, 'load',
thevenin_circuit.Vinput.dc_value / thevenin_circuit.Rgenerator.resistance)
