def test_subckt_statement(tline_params):
name = 'tline1'
result = pi_model_2c(1, name=name, **tline_params)
lines = result.split('\n')
assert f'.SUBCKT {name} 100 101 201' in lines
assert lines[-2] == f'.ENDS {name}'
assert lines[-1] == '' # Should end with new line
def test_resistance(tline_params, N, length):
result = pi_model_2c(N, **tline_params, length=length)
lines = result.split('\n')
resistances = get_values_of('R1', lines)
assert len(resistances) == N
assert sum(resistances) == approx(tline_params['R'] * length, rel=0.001)
assert len(set(resistances)) == 1
def test_inductance(tline_params, N, length):
result = pi_model_2c(N, **tline_params, length=length)
lines = result.split('\n')
inductances = get_values_of('L11', lines)
assert len(inductances) == N
assert sum(inductances) == approx(tline_params['L'] * length, rel=0.001)
assert len(set(inductances)) == 1
def test_capacitance(tline_params, N, length):
result = pi_model_2c(N, **tline_params, length=length)
lines = result.split('\n')
capacitances = get_values_of('C11', lines)
assert len(capacitances) == N + 1
assert sum(capacitances) == approx(tline_params['C'] * length, rel=0.001)
if N > 1:
assert len(set(capacitances)) == 2
assert capacitances[0] == approx(0.5 * capacitances[1], rel=0.001)
def test_inductor_statements(R, G):
result = pi_model_2c(3, L=3e-6, C=120e-12, R=R, G=G)
lines = result.split('\n')
if R == 0:
nets = ['N00001', 'N00001', 'N00002', 'N00002', '201']
else:
nets = ['N00001', 'N00002', 'N00003', 'N00004', 'N00005']
assert f'L11_001 101 {nets[0]} 1.00000e-06' in lines
assert f'L11_002 {nets[1]} {nets[2]} 1.00000e-06' in lines
assert f'L11_003 {nets[3]} {nets[4]} 1.00000e-06' in lines
def test_capacitor_statements(R, G):
result = pi_model_2c(3, L=3e-6, C=120e-12, R=R, G=G)
lines = result.split('\n')
if R == 0:
nets = ['N00001', 'N00002']
else:
nets = ['N00002', 'N00004']
assert 'C11_001 101 100 2.00000e-11' in lines
assert f'C11_002 {nets[0]} 100 4.00000e-11' in lines
assert f'C11_003 {nets[1]} 100 4.00000e-11' in lines
assert 'C11_004 201 100 2.00000e-11' in lines
def test_conductance(tline_params, N, length):
result = pi_model_2c(N, **tline_params, length=length)
lines = result.split('\n')
resistances = get_values_of('RG11', lines)
assert len(resistances) == N + 1
assert sum([1 / r
for r in resistances]) == approx(tline_params['G'] * length,
rel=0.001)
if N > 1:
assert len(set(resistances)) == 2
assert resistances[0] == approx(2 * resistances[1], rel=0.001)
def test_conductance_statements(R):
result = pi_model_2c(3, L=3e-6, C=120e-12, R=R, G=1e-9)
lines = result.split('\n')
if R == 0:
nets = ['N00001', 'N00002']
else:
nets = ['N00002', 'N00004']
assert 'RG11_001 101 100 6.00000e+09' in lines
assert f'RG11_002 {nets[0]} 100 3.00000e+09' in lines
assert f'RG11_003 {nets[1]} 100 3.00000e+09' in lines
assert 'RG11_004 201 100 6.00000e+09' in lines
def test_resistor_statements(G):
result = pi_model_2c(3, L=3e-6, C=120e-12, R=3, G=G)
lines = result.split('\n')
assert 'R1_001 N00001 N00002 1.00000e+00' in lines
assert 'R1_002 N00003 N00004 1.00000e+00' in lines
assert 'R1_003 N00005 201 1.00000e+00' in lines