Top quality hand written solutions in electrical engineering
8.78 Consider the BJT cascode amplifier of Fig. 8.38 for the case all transistors have equal β and ro. Show that the voltage gain Av can be expressed in the form A v = − 12 VA /V T VT VA +(1/β) Evaluate A v for the case VA = 5 V and β = 50. Note that except for the fact that β depends on I as a second-order effect, the gain is independent of the bias current I!