Fig Q4(a) is a load line diagram from a bipolar transistor in a common emitter amplifier. "Q" is the operating point of the transistor – Fig Q4 (a). What is

the current gain parameter B of the transistor at the operating point "Q"?[2] Using Fig Q4(a), determine what are the values of the supply voltage, Vcc and load resistance, RL of the amplifier circuit.[4] (b)An amplifier circuit similar to that of Fig Q4(b) is designed to have an emitter voltage of 1.5 V. The transistor has current gain parameter ß = 100. Assuming CE is large and can be treated as an AC short circuit, choose REi andRE2 so that the small signal voltage gain of the amplifier is -5.[6] Choose appropriate values of Rị and R2 to correctly determine the DC voltage of the base of the transistor, VB, in order to ensure that the transistor is in the operations region.[5] Draw a small signal equivalent circuit of the amplifier of Fig Q4(b) labeling allcomponents.[8]