Consider the class-AB output stage in Figure P8.28. The diodes and transistors are matched, with parameters \(I_{S}=6 \times 10^{-12} \mathrm{~A}\), and \(\beta=40\).

(a) Determine \(R_{1}\) such that the minimum current in the diodes is \(25 \mathrm{~mA}\) when \(v_{O}=24 \mathrm{~V}\). Find \(i_{N}\) and \(i_{P}\) for this condition.

(b) Using the results of part (a), determine the diode and transistor currents when \(v_{O}=0\).

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