Figure $19

Question

Figure $19 < 2$
-If the inputs are 4.1 V, -0.7 V and 3.1 V in Figure 19-2(b), the output voltage equals ________.
A)-6.5V 
B)13V 
C)-13V 
D)6.5V

Quizplus · Accepted Answer

Looking at the circuit, we can see that the output voltage is determined by the difference between the weighted sum of the input voltages and the reference voltage. In this case, the weighted sum is (4.1V x 2) + (-0.7V x 4) + (3.1V x 1) = 5.5V. Since the reference voltage is -13V, the output voltage equals -13V + 5.5V = -7.5V. However, the output voltage cannot exceed the supply voltage of -6.5V, so the output voltage is limited to -6.5V in this case. Therefore, the correct answer is C, -13V.

Figure 19<219 < 219<2 -If the Inputs Are 4

Figure $19 < 2$ -If the Inputs Are 4