For the basic two-transistor current source in Figure 10.2(b), the transistor parameters are: \(\beta=120, V_{B E}(\) on \()=0.7 \mathrm{~V}\), and \(V_{A}=100 \mathrm{~V}\). The bias voltages are \(V^{+}=5 \mathrm{~V}\) and \(V^{-}=-5 \mathrm{~V}\).

(a) Design the circuit such that \(I_{O}=0.5 \mathrm{~mA}\) when \(V_{C E 2}=0.7 \mathrm{~V}\).

(b) What is the percent change in \(I_{O}\) as \(V_{C E 2}\) varies between \(0.7 \mathrm{~V}\) and \(7 \mathrm{~V}\) ?

Figure 10.2(b):-

IREF V+ ww R + VBE v (b) Q2 Ic2=10 OVC2