A. Common base
B. Common emitter
C. Common collector
D. All have the same gain
Advertisement
Related Mcqs:
- 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 - Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250 ,are cascaded.The open circuit voltage gain of combined amplifier is_________?
A. 49dB
B. 51dB
C. 98dB
D. 102dB - Generally, the gain of a transistor amplifier falls at high frequencies due to the___________?
A. Internal Capacitance of the device
B. Coupling capacitor at the input
C. Skin effect
D. Coupling capacitor at the output - 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 - 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 - 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 - 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 - In deriving ac equivalent circuit for an amplifier circuit, we short circuit___________?
A. all resistors
B. all transistors
C. all inductors
D. all capacitors - The early effect in a bipolar junction transistor is caused by_______________?
A. fast turn-on
B. fast turn-off
C. large collector-base reverse bias
D. large emitter-base forward bias - Most of the linear ICs are based on the two-transistor differential amplifier because of its___________?
A. input voltage dependent linear transfer characteristic
B. high voltage gain
C. high input resistance
D. high CMRR
Advertisement