Consider the Widlar current source shown in Figure 10.9. The circuit parameters are (V^{+}=+5 mathrm{~V}, V^{-}=0, R_{1}=9.3

Question:

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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