EXPLANATION:
_GIVEN_
Vout = ((AUcl1 * v1) + (AUcl2 * v2) + (AUcl3 * v3)) + 1
AUcl1 = Rf/Rv1
AUcl2 = Rf/Rv2
AUcl3 = Rf/Rv3
v1 = 1V
v2 = 2V
v3 = 3V
Rv1 = Rv2 = Rv3 = 20k
Rf = 40k
_CALCULATION_
AUcl1 = 40/20 = 2
AUcl2 = 40/20 = 2
AUcl3 = 40/20 = 2
Vout = ((2 * 1) + (2 * 2) + (2 * 3)) + 1
= -12V ----> Minus because this is an inverted configuration
Looking at the probe output this is CORRECT!
