Topic: Electronics Engineering
In an inverting Op-Amp, the input bias current is -1 µA, and the input and the feedback resistance are both 1 M$\Omega$. What will be the output voltage for an input voltage of 2.5 V?
- A. -2.5 V
- B. -3.0 V
- C. -3.5 V
- D. 4.0 V
Answer: C. -3.5 V
Explanation: $V_{0}=-(\frac{R_{f}}{R_{i}})\cdot V_{in}+(I_{b}\times R_{f}) = -2.5~V + (-1~\mu A \times 1~M\Omega) = -2.5 - 1 = -3.5~V$.