Consider the output stage of the 741 op-amp shown in Figure 13.8. Assume \(I_{\text {Bias }}=0.18 \mathrm{~mA}\) and assume transistor parameters of \(I_{S}=10^{-14} \mathrm{~A}\) and \(\beta_{n}=200\).

(a) Determine the value of \(R_{10}\) that would result in \(I_{C 18}=\) \(0.25 I_{C 19}\).

(b) What are the resulting voltages \(V_{B E 18}\) and \(V_{B E 19}\) ?

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IREF 212 Q138 2134 IBias 218 Q19 R10= 50 IBias Q22 VI -o v+ K914 VBB RL Q20 www Figure 13.8 Basic output stage, 741 op-amp, showing currents and voltages