9-15. $V_a = 101$ mV in the circuit in Fig. 9-10(a), $V_o = 201$ mV in Fig. 9-10(b), and $V_o = -99$ mV in Fig. 9-10(c). Find (a) $V_{io}$, (b) $I_{B-}$, (c) $I_{B+}$.
9-16. Refer to Fig. P9-16. $V_{io} = 3$ mV, $I_{B-} = 0.4$ $\mu$A, and $I_{B+} = 0.1$ $\mu$A. (a) What is the best value for resistor R? Calculate the individual error in the output voltage, $V_o$, due to (b) $V_{io}$ only; (c) $I_{B+}$ only; (d) $I_{B-}$ only; (e) $I_{os}$ only. The ideal value of $V_o$ should be 1.00 V because of $E_i$. (f) What is the actual value of $V_o$ when both input offset voltage and current are present along with $E_i$?
FIGURE P9-16