(a) Suppose that at T 5 25 8C a certain npn BJT has Is 5 1 fA and VA 5 75 V. Find the value of VBE (in mV) needed to ensure IC 5 1.0 mA at VCE 5 5.0 V. (b) What happens to IC if VCE is raised to 10 V?...

(a) Suppose that at T 5 25 8C a certain npn BJT has Is 5 1 fA and VA 5 75 V. Find the value of VBE (in mV) needed to ensure IC 5 1.0 mA at VCE 5 5.0 V. (b) What happens to IC if VCE is raised to 10 V? Lowered to 1 V? (c) Assume again VCE 5 5.0 V. What is the mV value of VBE needed to ensure IC 5 1.0 mA at T 5 0 8C? To ensure IC 5 0.2 mA at T 5 50 8C? To ensure IC 5 4.0 mA at T 5 40 8C? Hint: start out with the value of VBE found in part (a), and use the rules of thumb to make your estimates