The most commonly used amplifier in sample & hold circuits is______________?

Related Mcqs:

1. An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?

   A. 1/11KΩ B. 1/5KΩ C. 5KΩ D. 11KΩ...

2. An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed________?

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

3. A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ .At the frequency of 4KHZ,the o/p voltage will be___________?

   A. 1 v B. 2v C. 1.4v D. 2.8v...

4. A 741-type OP-AMP has a gain-bandwidth product of 1MHz. A non-inverting amplifier using this op-amp & having a voltage gain of 20db will exhibit -3db bandwidth of__________?

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

5. 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...

6. 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...

7. Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in____________?

   A. Only the temperature B. only the β of the transistor C. Both Temperature & β D. None of the above...

8. In a CB amplifier the maximum efficiency could be____________?

   A. 99% B. 85% C. 50% D. 25%...

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

   A. 2 B. 1 C. 1/2 D. 0...

10. The cascade amplifier is a multistage configuration of__________?

    A. CC-CB . B. CE-CB C. CB-CC D. CE-CC...