Here, the total output resistance is calculated when the Early voltage is completely unspecified and neglected (I suppose it's zero). How has this been done? The formula for terminal output resistance (Ro) for BJT Amplifiers is (Va + Vce)/Ic where Va is the Early voltage, Vce and the collector-emitter voltage and Ic is the collector current. Vce and Ic are calculated via the Q-point. Rout is then calculated by taking Rc and adding in parallel with the calculated Ro. However, my calculation gives me 29.6k Ohms, not 39k Ohms as said in the solution. (Vce/Ic)||Rc gives me 29.6k Ohms. Please let me know where I went wrong. Here are the relevant images:
What are Av, Ai , Rin, Rout, and the maximum amplitude of the signal source for the amplifier in
Fig. P14.1(g) if RI = 500 , RE = 110 k,
RB = 1 M, R3 = 500 k, RC = 42 k,
VCC = 15 V, −VEE = −15 V? Use βF = 100.