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A certain noninverting amplifier has Ri of 1 kΩ and Rf of 100 kΩ. The closed-loop voltage gain is
Answer & Solution
Correct Answer:
Option
C
To find the closed-loop voltage gain of a noninverting amplifier, use the formula:
Closed-loop voltage gain $$A_{v}$$ = $$1 + \frac{R_f}{R_i}$$
Given:
- $$R_i$$ (input resistance) = 1 kΩ
- $$R_f$$ (feedback resistance) = 100 kΩ
Substitute these values into the formula:
$$A_{v} = 1 + \frac{100000}{1000}$$
$$A_{v} = 1 + 100$$
$$A_{v} = 101$$
Therefore, the closed-loop voltage gain is 101.
Closed-loop voltage gain $$A_{v}$$ = $$1 + \frac{R_f}{R_i}$$
Given:
- $$R_i$$ (input resistance) = 1 kΩ
- $$R_f$$ (feedback resistance) = 100 kΩ
Substitute these values into the formula:
$$A_{v} = 1 + \frac{100000}{1000}$$
$$A_{v} = 1 + 100$$
$$A_{v} = 101$$
Therefore, the closed-loop voltage gain is 101.
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