1. The problem statement, all variables and given/known data a)Find R1 b)Find the change in IC if Re varies by 5%. Given: Ic = 0.25mA β=100 (see attached ckt) 2. Relevant equations 3. The attempt at a solution Ic=0.25mA, Ib=0.0025mA Vbe = 0.6956V Ie=Ic+Ib = 0.2525mA Re = 200*0.2525 = 50.5mV Found R1 by applying KCL at base. (Vcc-Vbe-Vre)/R1 = (Vbe+Vre)/10k + Ib R1=22.75K For part b) Re be +5% = 210 ohms Vre = 210*Ie= 53mV Is this even correct, I took the old Ie. What next? I can't use any equations having Vbe or Ib since they change with increase in Vre.