Topic: Analog Circuits
A high gain Op-Amp has $R_{f}=10^{5}~\Omega$ and $R_{i}=10^{3}~\Omega$. The correct statement is
- A. The non-inverting gain and inverting gain are nearly same.
- B. The inverting gain is very much higher than non-inverting gain
- C. The non-inverting gain is very much higher than inverting gain
- D. The inverting and non-inverting gains are unrelated
Answer: A. The non-inverting gain and inverting gain are nearly same.
Explanation: $A_{noninverting}=(1+\frac{R_{F}}{R_{i}})=(1+\frac{10^{5}}{10^{3}})=101$. $A_{inverting}=-\frac{R_{F}}{R_{i}}=-\frac{10^{5}}{10^{3}}=-100$. The magnitude of non-inverting and inverting gains are nearly same.