Question: If it is desired to have low output impedance in an amplifier circuit then we should use [A]. common collector circuit [B]. common base circuit [C]. common emitter circuit [D]. either (b) or (c) Answer: Option A Explanation: Therefore…
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…
The encapsulation of transistor is necessary for__________? A. preventing radio interference B. preventing photo-emission effects C. avoiding loss of free electronsD. mechanical ruggedness
The cascade amplifier is a multistage configuration of__________? A. CC-CB .B. CE-CB C. CB-CC D. CE-CC
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. 51dBC. 98dB D. 102dB
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…
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________? A. fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz.B. fT =1.47 x 1010 Hz &…
The MOSFET switch in its on-state may be considered equivalent to_____________? A. resistor B. inductorC. capacitor D. battery
. 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 mAD. 5.2mA
In a common emitter, unbypassed resister provides___________? A. voltage shunt feedback B. current series feedbackC. negative voltage feedback D. positive current feedback