Video Solutions for GATE 1999 ECE : One Mark Questions ( Electron Devices )

1. 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

2. In the cascade amplifier shown in figure, if the common

    emitter stage (Q1) has a transconductance g_m1, and 

    the common base stage (Q2) has a transconductance g_m2,

    then the overall transconductance , g = (i_o/V_i) of 

    the cascade amplifier is