Consider the Widlar current source shown in Figure 10.9. The circuit parameters are \(V^{+}=+5 \mathrm{~V}, V^{-}=0, R_{1}=9.3 \mathrm{k} \Omega\), and \(R_{E}=1.5 \mathrm{k} \Omega\). Assume \(V_{B E 1}=0.7 \mathrm{~V}\). Neglecting base currents, determine \(I_{\mathrm{REF}}, I_{O}\), and \(V_{B E 2}\).

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V+ IREF Icil R R + + VBEI V BE2 1E2RE V Figure 10.9 Widlar current source