Suppose the BJT of Fig. P6.2 has C 5 40 fF and its current gain 5 IcyIb is measured at f 5 500 MHz for two different dc-bias conditions. (a) If it is found that uu 5 13.5 at IC 5 1.0 mA, and uu 5 9.2...

Suppose the BJT of Fig. P6.2 has C 5 40 fF and its current gain 5 IcyIb is measured at f 5 500 MHz for two different dc-bias conditions. (a) If it is found that uu 5 13.5 at IC 5 1.0 mA, and uu 5 9.2 at IC 5 0.25 mA, estimate Cje and F. Assume these parameters are dc-bias independent and there are no high-level injection effects. (b) What is the value of uu at IC 5 0.1 mA and f 5 200 MHz? Hint: exploit the constancy of the gain-bandwidth product.