6.8 The parameters of each transistor in the circuits shown in Figure P6.8 are B 130, VA 80 V, and Icq=0.2 mA. Determine the output resistance Ro for each circuit. ww (a) Figure P6.8 V+ V+ Re=10kQ RC= 10 ΚΩ Ro R₂ = 100 k www. R₂ Rg50 k ww VBB -ww--| R₁₁ =5kQ RC= 4 ΚΩ VBB (b) (c)

Fig: 1