The bandwidth of an RF tuned amplifier is dependent on____________?

Related Mcqs:

1. 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

2. 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

3. 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

4. In deriving ac equivalent circuit for an amplifier circuit, we short circuit___________?

   A. all resistors
   B. all transistors
   C. all inductors
   D. all capacitors

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 most commonly used amplifier in sample & hold circuits is______________?

   A. A unity gain non-inverting amplifier
   B. A unity gain inverting amplifier
   C. An inverting amplifier with a gain of 10
   D. An inverting amplifiers with a gain of 100

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