def eval_cqs(self, vPort, getOP = False):
"""
Calculates drain current. Input is a vector as follows:
vPort = [vdb , vgb , vsb]
If getOP = True, return normal output vector plus operating
point variables in tuple: (iVec, qVec, opV)
"""
# Invert all voltages in case of a P-channel device
vPort1 = self._tf * vPort
vp = (vPort1[1] - self._vthT) / self.n
# Normalized currents
i_f = inv_f((vp - vPort1[2]) / self._Vt)
i_r = inv_f((vp - vPort1[0]) / self._Vt)
idrain = self._IS * (i_f - i_r)
iVec, qVec = np.array([idrain]), np.array([])
if getOP:
# Create operating point variables dictionary
return {'VD': vPort[0],
'VG': vPort[1],
'VS': vPort[2],
'IDS': idrain,
'Vth': self._vthT,
'IS': self._IS,
'vp': vp,
'i_f': i_f,
'i_r': i_r}
else:
# Return numpy array with one element per current source.
return (iVec, qVec)
def eval_cqs(self, vPort, saveOP = False):
"""
Calculates drain current. Input is a vector as follows:
vPort = [vdb , vgb , vsb]
If saveOP = True, return normal output vector plus operating
point variables in tuple: (iVec, qVec, opV)
"""
# Invert all voltages in case of a P-channel device
vPort1 = self._tf * vPort
vp = (vPort1[1] - self._vthT) / self.n
# Normalized currents
i_f = inv_f((vp - vPort1[2]) / self._Vt)
i_r = inv_f((vp - vPort1[0]) / self._Vt)
idrain = self._IS * (i_f - i_r)
iVec, qVec = np.array([idrain]), np.array([])
if saveOP:
# This is neccesary to keep the AD library happy: all
# variables in vector must be adoubles
vth = 0. * vp + self._vthT
IS = 0. * vp + self._IS
# Create operating point variables vector
opV = np.array([vth, vp, i_f, i_r, IS])
return (iVec, qVec, opV)
else:
# Return numpy array with one element per current source.
return (iVec, qVec)
def eval_cqs(self, vPort, getOP=False):
"""
Calculates drain current. Input is a vector as follows:
vPort = [vdb , vgb , vsb]
If getOP = True, return normal output vector plus operating
point variables in tuple: (iVec, qVec, opV)
"""
# Invert all voltages in case of a P-channel device
vPort1 = self._tf * vPort
vp = (vPort1[1] - self._vthT) / self.n
# Normalized currents
i_f = inv_f((vp - vPort1[2]) / self._Vt)
i_r = inv_f((vp - vPort1[0]) / self._Vt)
idrain = self._IS * (i_f - i_r)
iVec, qVec = np.array([idrain]), np.array([])
if getOP:
# Create operating point variables dictionary
return {
'VD': vPort[0],
'VG': vPort[1],
'VS': vPort[2],
'IDS': idrain,
'Vth': self._vthT,
'IS': self._IS,
'vp': vp,
'i_f': i_f,
'i_r': i_r
}
else:
# Return numpy array with one element per current source.
return (iVec, qVec)
