Consider the Widlar current-source circuit with multiple output transistors shown in Figure P10.37. Assume \(V_{B E 1}=0.7\) V.

(a) For circuit parameters \(R_{1}=10 \mathrm{k} \Omega, R_{E 2}=1 \mathrm{k} \Omega\), and \(R_{E 2}=2 \mathrm{k} \Omega\), find \(I_{\mathrm{REF}}, I_{O 2}\), and \(I_{O 3}\).

(b) Determine new values of \(R_{E 2}\) and \(R_{E 3}\) such that \(I_{O 2}=20 \mu \mathrm{A}\) and \(I_{O 3}=80 \mu \mathrm{A}\).

Transcribed Image Text:

V+=5V REF R Ke ko RE2 Figure P10.37 V=-5 V 103 Rg3