B=100 and VA = 100 6.21 The parameters of the transistor in the circuit in Figure P6.21 are ẞ= 100 and VA 100 V. (a) Find the dc voltages at the base and emitter terminals. (b) Find Rc such that VCsQ = 3.5 V. (c) Assuming Cc and Cg act as short circuits, determine the small-signal voltage gain A, vo/vs. (d) Repeat part (c) if a 500 2 source resistor is in series with the u, signal source. V+=+5 V = Rs 100 2 Figure P6.21 Cc RC V+=+5 V Re -000 Rg-2002 www R₁ = 6k Cel RB= 10kQ Ск 0.35 mA V-=-5V Figure P6.22 R₂ = 1.2k R₂= 1.5 ΚΩ Rg CE 0.1 kQ

Fig: 1