A student is performing voltmeter measurements on the circuits of Fig. P2.15 in order to extract the principal BJT parameters. (a)In the circuit of (a) the BJT operates in the FA mode. If it is found...

A student is performing voltmeter measurements on the circuits of Fig. P2.15 in order to extract the principal BJT parameters.

(a)In the circuit of (a) the BJT operates in the FA mode. If it is found that VEB 5 690 mV and VEC 5 1.0 V, what are the values of Is and F? (For these calculations, assume VA 5 `.) (b) If letting R2 → 0 causes a 10% increase in IC, what is the value of VA? (c) Next, the student forces the BJT in the RA mode by interconnecting it in the circuit of (b). Since the role of collector is now played by the emitter region, the student has relabeled the emitter-terminal current as I 9 C , fl owing out of the BJT. Then, R 5 I 9 C y I B. If it is found that VE 5 3.5 V, what is the experimental value of R?