A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by_______________?

Related Mcqs:

1. In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db & 2db respectively, then its common mode rejection ratio is________________?

   A. 23dB B. 25dB C. 46dB D. 50dB...

2. For an op-amp having differential gain Av and common-mode gain Ac the CMRR is given by___________?

   A. Av + Ac B. Av / Ac C. 1 + Av / AC. D. Ac / Av...

3. An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed_____________?

   A. 795mV B. 395mV C. 795mV D. 39.5mV...

4. A 741-Type OP-AMP has a gain-bandwith product of 1MHz. A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of______________?

   A. 50KHz B. 100KHz C. 1000/17KHz D. 1000/7.07KHz...

5. A differential amplifier is invariably used in the i/p stage of all op-amps. This is done basically to provide the op-amps with a very high______________?

   A. CMMR B. Bandwidth C. Slew rate D. Open-loop gain...

6. The closed-loop voltage gain of an inverting amplifier equal to______________?

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

7. Differential amplifiers are used in______________?

   A. Instrumentation amplifiers B. Voltage followers C. Voltage regulators D. Buffers...

8. Which of the following amplifier is used in a digital to analog converter?

   A. Non inverter B. Voltage follower C. Summer D. Difference amplifier...

9. A non inverting closed loop op amp circuit generally has a gain factor______________?

   A. Less than one B. Greater than one C. Of zero D. Equal to one...

10. When a step-input is given to an op-amp integrator, the output will be______________?

    A. A ramp B. A sinusoidal wave C. A rectangular wave D. A triangular wave with dc bias...