A. 5 Ω & 20 %
B. 25 Ω & 20 %
C. 5 Ω & 16.7 %
D. 25 Ω & 16.7 %
Analog Electronics
The cascade amplifier is a multistage configuration of__________?
A. CC-CB .
B. CE-CB
C. CB-CC
D. CE-CC
. If =0.98 ,Ico=6µA and Iβ=100µA for a transistor,then the value of Ic will be______?
A. 2.3mA
B. 3.2mA
C. 4.6 mA
D. 5.2mA
The effective channel length of a MOSFET in a saturation decreases with increase in___________?
A. Gate voltage
B. Drain voltage
C. Source voltage
D. Body voltage
An n- channel JFET has IDSS=2mA,and Vp=-4v.Its transconductance gm=in mA/V)for an applied gate to source voltage VGS=-2v is___________?
A. 0.25
B. 0.5
C. 0.75
D. 1
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
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
In all base driver amplifiers__________?
A. ac collector voltage is 180° out of phase with ac base voltage
B. ac emitter voltage is 180° out of phase with ac base voltage
C. ac collector voltage is in phase with ac base voltage
D. none of the above
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
Voltage Series feedback also called series-shunt feedback) results in__________?
A. Increase in both input & output impedances
B. Decreases in both input & output impedances
C. Increase in input impedance & decreases in output impedance
D. Decrease in input impedance & increase in output impedance
