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Question

$$\text { Figure } \mathbf { 1 9 } < \mathbf { 1 }$$ -If V_IN equals 4 V in Figure 19-1, V_OUT equals__________ A) -13 V B) 13 V C) -1 V D) 1 V

Quizplus · Accepted Answer

In Figure 19-1, we can see that the input of the op-amp (V_IN) is connected to the inverting input (-) and the non-inverting input (+) is connected to ground. Therefore, the output voltage (V_OUT) will be the inverse of the input voltage multiplied by the gain (A). We know that the gain of the op-amp is given by: A = -R2/R1 Where R2 is the feedback resistor (10 kΩ) and R1 is the input resistor (1 kΩ). Plugging in the values, we get: A = -10 kΩ/1 kΩ = -10 So, the output voltage will be: V_OUT = -A*V_IN V_OUT = -(-10)*4 V V_OUT = 40 V However, since the op-amp is powered by a single 30 V supply, the output voltage cannot exceed this value. Therefore, the output voltage will saturate at +30 V. So, the correct answer is: V_OUT = +30 V - (A*V_IN) V_OUT = +30 V - (-10*4 V) V_OUT = 13 V

Figure 19<1\text { Figure } \mathbf { 1 9 } < \mathbf { 1 } Figure 19<1

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