# Electronics - Operational Amplifiers

### Exercise :: Operational Amplifiers - General Questions

46.

A differential amplifier has a common-mode gain of 0.2 and a common-mode rejection ratio of 3250. What would the output voltage be if the single-ended input voltage was 7 mV rms?

 A. 1.4 mV rms B. 650 mV rms C. 4.55 V rms D. 0.455 V rms

Explanation:

No answer description available for this question. Let us discuss.

47.

The magnitude of closed-loop voltage gain (Acl) of an inverting amplifier equals:

 A. the ratio of the input resistance to the feedback resistance B. the open-loop voltage gain Aol C. the feedback resistance divided by the input resistance D. the input resistance

Explanation:

No answer description available for this question. Let us discuss.

48.

What is the difference between common-mode and differential-mode input signals?

 A. phase relationship B. voltage C. current D. apparent power

Explanation:

No answer description available for this question. Let us discuss.

49.

A circuit that uses an amplifier with passive filter elements is called a(n):

 A. relaxation oscillator B. signal generator C. differential amplifier D. active filter

Explanation:

No answer description available for this question. Let us discuss.

50.

The input offset current equals the

 A. average of two base currents B. collector current divided by the current gain C. difference between two base-emitter voltages D. difference between two base currents