The circuit parameters of the Widlar current source in Figure 10.9 are \(V^{+}=3 \mathrm{~V}, V^{-}=-3 \mathrm{~V}\), and \(R_{1}=20 \mathrm{k} \Omega\). Assume \(V_{B E 1}(\mathrm{on})=0.7 \mathrm{~V}\) and \(V_{A}=\infty\).

(a) Determine \(I_{\mathrm{REF}}\) and

(b) \(R_{E}\) such that \(I_{O}=100 \mu \mathrm{A}\).

Transcribed Image Text:

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