def test_filtered_noise2(self):
"""Lcapy: check circuit filtered noise"""
a = Circuit()
a.add('V1 1 0 noise {sqrt(4 * k * T * R)}')
a.add('R1 1 2 R')
a.add('C1 2 0 C')
self.assertEqual2(a.C1.V.n.rms(), Vt('sqrt(k * T / C)'),
"Incorrect capacitor voltage")
def test_VR1_ac2(self):
"""Lcapy: check VR circuit at ac for angular frequency 1
"""
# This can be solved in the time-domain
a = Circuit()
a.add('V1 1 0 ac 5 0 1')
a.add('R1 1 0 1')
self.assertEqual(a.is_ivp, False, "Initial value problem incorrect")
self.assertEqual(a.is_dc, False, "DC incorrect")
self.assertEqual(a.is_ac, True, "AC incorrect")
self.assertEqual(a.is_causal, False, "Causal incorrect")
self.assertEqual(a.is_time_domain, True, "Time domain incorrect")
self.assertEqual(a.V1.v, Vt('5*cos(t)'), "V1 voltage incorrect")
self.assertEqual(a.R1.v, Vt('5*cos(t)'), "R1 voltage incorrect")
self.assertEqual(a.V1.i, It('5*cos(t)'), "V1 current incorrect")
self.assertEqual(a.R1.i, It('5*cos(t)'), "R1 current incorrect")
def test_VRL1_ac2(self):
"""Lcapy: check VRL circuit at ac for angular frequency 1
"""
a = Circuit()
a.add('V1 1 0 ac 5 0 1')
a.add('R1 1 2 3')
a.add('L1 2 0 4')
self.assertEqual(a.is_ivp, False, "Initial value problem incorrect")
self.assertEqual(a.is_dc, False, "DC incorrect")
self.assertEqual(a.is_ac, True, "AC incorrect")
self.assertEqual(a.is_causal, False, "Causal incorrect")
self.assertEqual(a.is_time_domain, False, "Time domain incorrect")
self.assertEqual(a.V1.v, Vt('5*cos(t)'), "V1 voltage incorrect")
self.assertEqual(a.R1.i, It('(4*sin(t)+3*cos(t))/5'), "R1 current incorrect")