Consider the Widlar current source in Figure 10.9. The circuit parameters are: \(V^{+}=10 \mathrm{~V}, V^{-}=-10 \mathrm{~V}, R_{1}=40 \mathrm{k} \Omega\), and \(R_{E}=12 \mathrm{k} \Omega\). Neglect base currents and assume \(V_{B E 1}=0.7 \mathrm{~V}\) at \(1 \mathrm{~mA}\). Determine \(I_{\mathrm{REF}}, I_{O}, V_{B E 1}\), and \(V_{B E 2}\).

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V+ IREF Ici www Q R Ro Ic2=10 -oVc2 Q2 + + VBEL VBE2 RE IE2 V Figure 10.9 Widlar current source