Tutorial 2 1. Calculate VCE, IC and IB for the circuit in Figure E3. Given ß = 100 and VBE = 0.7V. + 25V RB1 220 k + 9V RC 6 k RB 100 k RB2 470 k RE 2.5 k RE 1.5 k Figure E3 Rajah E4 2. Determine VC, VB and VE for a voltage feedback biasing circuit if RB = 470k, RC = 4k , VCC = 22V, RE = 200, ß = 200 and VBE = 0.7V. 3. Obtain RB needed for a voltage feedback biasing circuit to give an operating point at ICQ = 4.35mA and VCEQ = 1.6V. Given VCC = 30V, RC = 5.5k, RE = 1k and ß = 180. Assume VBE = 0.7V. 4. Determine the biasing current and voltage for the circuit in Figure Given ß = 45 and VBE = 0.7V. 5. Find R1 and R2 of a voltage divider circuit that has been simplified to a circuit shown in Figure E5. Assuming VBE = 0.5V, obtain the Q-point for the circuit if (a) ß = 80 and (b) ß = 160. What can be said about the operating point of the transistor with a 100% change in ß? + 28V 15 k 10 k 1 k 1.6V Figure E5 E4.