A. resistor
B. inductor
C. capacitor
D. battery
0
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are________?
0
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. fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz.
B. fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz
C. fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz
D. fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz
0
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. 795mV
B. 395mV
C. 795 mV
D. 39.5mV
0
The cascade amplifier is a multistage configuration of__________?
A. 49dB
B. 51dB
C. 98dB
D. 102dB
0
The encapsulation of transistor is necessary for__________?
A. CC-CB .
B. CE-CB
C. CB-CC
D. CE-CC
0
In all base driver amplifiers__________?
A. preventing radio interference
B. preventing photo-emission effects
C. avoiding loss of free electrons
D. mechanical ruggedness
0
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
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