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# This calculator helps calculate values of the op-amp configured as inverting, non-inverting or differential amplifier
from eez import scpi
TYPE_NON_INV = 0
TYPE_INV = 1
TYPE_DIFF_SIMPL = 2
TYPE_DIFF = 3
opAmpType = TYPE_NON_INV
Vin = None
Vin1 = None
Vin2 = None
R1 = None
R2 = None
Rf = None
Rg = None
Vout = None
def inputVoltage(name, voltage):
value = scpi('DISP:INPUT? "' + name + '",NUMBER,VOLT,-1E6,1E6,' + (str(voltage) if voltage != None else "1"))
if value != None:
voltage = float(value)
scpi('DISP:DIALog:DATA "' + name + '",FLOAT,VOLT,' + str(voltage))
return voltage
def inputResistance(name, resistance):
value = scpi('DISP:INPUT? "' + name + '",NUMBER,OHM,-1E15,1E15,' + (str(resistance) if resistance != None else "1E3"))
if value != None:
resistance = float(value)
scpi('DISP:DIALog:DATA "' + name + '",FLOAT,OHM,' + str(resistance))
return resistance
def setVoltageData(name, value):
scpi('DISP:DIALog:DATA "' + name + '",FLOAT,VOLT,' + str(round(value, 4)))
def setResistanceData(name, value):
scpi('DISP:DIALog:DATA "' + name + '",FLOAT,OHM,' + str(round(value, 4)))
def error(message):
scpi('DISP:ERROR "' + message + '"')
def select_type():
global opAmpType
value = scpi('DISP:SELECT? ' + str(opAmpType + 1) + ',"Non-inverting","Inverting","Diff. simplified","Differential"')
if value != None and value != 0:
opAmpType = value - 1
scpi("DISP:DIALog:DATA \"type\",INTEGER," + str(opAmpType))
def input_Vin():
global Vin
Vin = inputVoltage("Vin", Vin)
def input_Vin1():
global Vin1
Vin1 = inputVoltage("Vin1", Vin1)
def input_Vin2():
global Vin2
Vin2 = inputVoltage("Vin2", Vin2)
def input_R1():
global R1
R1 = inputResistance("R1", R1)
def input_R2():
global R2
R2 = inputResistance("R2", R2)
def input_Rf():
global Rf
Rf = inputResistance("Rf", Rf)
def input_Rg():
global Rg
Rg = inputResistance("Rg", Rg)
def input_Vout():
global Vout
Vout = inputVoltage("Vout", Vout)
def can_calc_Vout():
if opAmpType == TYPE_NON_INV or opAmpType == TYPE_INV:
return Vin != None and R1 != None and R2 != None
elif opAmpType == TYPE_DIFF_SIMPL:
return Vin1 != None and Vin2 != None and R1 != None and R2 != None
else:
return Vin1 != None and Vin2 != None and R1 != None and R2 != None and Rf != None and Rg != None
def can_calc_Vin1():
if opAmpType == TYPE_DIFF_SIMPL:
return Vin2 != None and R1 != None and R2 != None and Vout != None
elif opAmpType == TYPE_DIFF:
return Vin2 != None and R1 != None and R2 != None and Rf != None and Rg != None and Vout != None
else:
return False
def can_calc_Vin2():
if opAmpType == TYPE_DIFF_SIMPL:
return Vin1 != None and R1 != None and R2 != None and Vout != None
elif opAmpType == TYPE_DIFF:
return Vin1 != None and R1 != None and R2 != None and Rf != None and Rg != None and Vout != None
else:
return False
def can_calc_R1():
if opAmpType == TYPE_NON_INV or opAmpType == TYPE_INV:
return Vin != None and R2 != None and Vout != None
elif opAmpType == TYPE_DIFF_SIMPL:
return Vin1 != None and Vin2 != None and R2 != None and Vout != None
else:
return Vin1 != None and Vin2 != None and R2 != None and Rf != None and Rg != None and Vout != None
def can_calc_R2():
if opAmpType == TYPE_NON_INV or opAmpType == TYPE_INV:
return Vin != None and R1 != None and Vout != None
elif opAmpType == TYPE_DIFF_SIMPL:
return Vin1 != None and Vin2 != None and R1 != None and Vout != None
else:
return Vin1 != None and Vin2 != None and R1 != None and Rf != None and Rg != None and Vout != None
def can_calc_Rf():
if opAmpType == TYPE_DIFF:
return Vin1 != None and Vin2 != None and R1 != None and R2 != None and Rg != None and Vout != None
else:
return False
def can_calc_Rg():
if opAmpType == TYPE_DIFF:
return Vin1 != None and Vin2 != None and R1 != None and R2 != None and Rf != None and Vout != None
else:
return False
def can_calc_Vin():
if opAmpType == TYPE_NON_INV or opAmpType == TYPE_INV:
return R1 != None and R2 != None and Vout != None
else:
return False
def calc_Vin():
if can_calc_Vin():
global Vin
if opAmpType == TYPE_NON_INV:
Vin = Vout * R2 / (R1 + R2)
else:
Vin = -Vout * R2 / R1
setVoltageData("Vin", Vin)
else:
error("Enter R1, R2 and Vout")
def calc_Vin1():
if can_calc_Vin1():
global Vin1
if opAmpType == TYPE_DIFF_SIMPL:
Vin1 = Vout * R1 / R2 + Vin2
else:
Vin1 = (Vout + Vin2 * Rf / R2) * ((R1 + Rg) * R2) / (Rg * (R2 + Rf))
setVoltageData("Vin1", Vin1)
else:
if opAmpType == TYPE_DIFF_SIMPL:
error("Enter Vin2, R1, R2 and Vout")
else:
error("Enter Vin2, R1, R2, Rf, Rg and Vout")
def calc_Vin2():
if can_calc_Vin2():
global Vin2
if opAmpType == TYPE_DIFF_SIMPL:
Vin2 = Vin1 - Vout * R1 / R2
else:
Vin2 = ((Vin1 * Rg * (R2 + Rf) / (R1 + Rg)) - Vout * R2) / Rf
setVoltageData("Vin2", Vin2)
else:
if opAmpType == TYPE_DIFF_SIMPL:
error("Enter Vin1, R1, R2 and Vout")
else:
error("Enter Vin2, R1, R2, Rf, Rg and Vout")
def calc_R1():
if can_calc_R1():
global R1
if opAmpType == TYPE_NON_INV:
R1 = R2 * (Vout - Vin) / Vin
elif opAmpType == TYPE_INV:
R1 = -R2 * Vout / Vin
elif opAmpType == TYPE_DIFF_SIMPL:
R1 = R2 * (Vin1 - Vin2) / Vout
else:
R1 = (Vin1 * (R2 + Rf) * Rg) / (Vout * R2 + Vin2 * Rf) - Rg
setResistanceData("R1", R1)
else:
if opAmpType == TYPE_NON_INV or opAmpType == TYPE_INV:
error("Enter Vin, R2 and Vout")
elif opAmpType == TYPE_DIFF_SIMPL:
error("Enter Vin1, Vin2, R2 and Vout")
else:
error("Enter Vin1, Vin2, R2, Rf, Rg and Vout")
def calc_R2():
if can_calc_R2():
global R2
if opAmpType == TYPE_NON_INV:
R2 = R1 * Vin / (Vout - Vin)
elif opAmpType == TYPE_INV:
R2 = -R1 * Vin / Vout
elif opAmpType == TYPE_DIFF_SIMPL:
R2 = R1 * Vout / (Vin1 - Vin2)
else:
R2 = Rf * (Vin1 * Rg - Vin2 * (R1 + Rg)) / (Vout * (R1 + Rg) - Vin1 * Rg)
setResistanceData("R2", R2)
else:
if opAmpType == TYPE_NON_INV or opAmpType == TYPE_INV:
error("Enter Vin, R1 and Vout")
elif opAmpType == TYPE_DIFF_SIMPL:
error("Enter Vin1, Vin2, R1 and Vout")
else:
error("Enter Vin1, Vin2, R1, Rf, Rg and Vout")
def calc_Rf():
if can_calc_Rf():
global Rf
Rf = (Vout * R2 * (R1 + Rg) - Vin1 * R2 * Rg) / (Vin1 * Rg - Vin2 * (R1 + Rg))
setResistanceData("Rf", Rf)
else:
error("Enter Vin1, Vin2, R1, R2, Rg and Vout")
def calc_Rg():
if can_calc_Rg():
global Rg
x = (Vout * R2 + Vin2 * Rf) / (Vin1 * (R2 + Rf))
Rg = R1 * x / (1 - x)
setResistanceData("Rg", Rg)
else:
error("Enter Vin1, Vin2, R1, R2, Rf and Vout")
def calc_Vout():
if can_calc_Vout():
global Vout
if opAmpType == TYPE_NON_INV:
Vout = Vin * (1 + R1 / R2)
elif opAmpType == TYPE_INV:
Vout = -Vin * R1 / R2
elif opAmpType == TYPE_DIFF_SIMPL:
Vout = R2 / R1 * (Vin1 - Vin2)
else:
Vout = -Vin2 * Rf / R2 + Vin1 * Rg / (R1 + Rg) * (R2 + Rf) / R2
setVoltageData("Vout", Vout)
else:
if opAmpType == TYPE_NON_INV or opAmpType == TYPE_INV:
error("Enter Vin, R1 and R2")
elif opAmpType == TYPE_DIFF_SIMPL:
error("Enter Vin1, Vin2, R1 and R2")
else:
error("Enter Vin1, Vin2, R1, R2, Rf and Rg")
scpi("DISP:DIALog:OPEN \"/Scripts/Op-Amp Calculator.res\"")
while True:
action = scpi("DISP:DIALog:ACTIon?")
if action == "select_type":
select_type()
if action == "input_Vin":
input_Vin()
elif action == "input_Vin1":
input_Vin1()
elif action == "input_Vin2":
input_Vin2()
elif action == "input_R1":
input_R1()
elif action == "input_R2":
input_R2()
elif action == "input_Rf":
input_Rf()
elif action == "input_Rg":
input_Rg()
elif action == "input_Vout":
input_Vout()
elif action == "calc_Vin":
calc_Vin()
elif action == "calc_Vin1":
calc_Vin1()
elif action == "calc_Vin2":
calc_Vin2()
elif action == "calc_R1":
calc_R1()
elif action == "calc_R2":
calc_R2()
elif action == "calc_Rf":
calc_Rf()
elif action == "calc_Rg":
calc_Rg()
elif action == "calc_Vout":
calc_Vout()
elif action == "close" or action == 0:
scpi("DISP:DIALog:CLOSe")
break