A signal of -80 mV is applied to the inverting terminal of the amplifier while the non-inverting terminal is grounded. The gain of the amplifier is 25 using Rin(R1) equal to 3 ohms and Rf(R2) equal to 75 Ohms. What would be the value of the output signal?
Correct answer: C. 2 V
- A. 200 mV
- B. -3 V
- C. 2 V
- D. 3 V
Explanation
Since Gain = 25Vout = Vin * Gain = -80mv * 25 = -2000 mv = -2V = 2V**** since a positive-going voltage at the inverting terminal gives a negative-going output voltage, hence the answer is positive 2V.
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