Consider the Widlar current source in Problem 10.27. For (beta=80) and (V_{A}=80 mathrm{~V}), determine the change in

Question:

Consider the Widlar current source in Problem 10.27. For \(\beta=80\) and \(V_{A}=80 \mathrm{~V}\), determine the change in \(I_{O}\) corresponding to a \(5 \mathrm{~V}\) change in the output voltage.

Data From Problem 10.27:-

(a) For the Widlar current source shown in Figure 10.9, find \(I_{\text {REF }}, I_{O}\), and \(V_{B E 2}\) if \(R_{1}=50 \mathrm{k} \Omega, R_{E}=3 \mathrm{k} \Omega, V^{+}=5 \mathrm{~V}\), and \(V^{-}=-5 \mathrm{~V}\). The transistor parameters are \(\beta=120\) and \(V_{B E 1}\) (on) \(=0.7 \mathrm{~V}\).

(b) Determine \(R_{o}\) for \(V_{A}=80 \mathrm{~V}\).

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