Question: Design a Widlar current source using npn transistors that produces a 5 µA output current. Use Fig. 4.31a with identical transistors, V CC = 30

Design a Widlar current source using npn transistors that produces a 5 µA output current. Use

Fig. 4.31a with identical transistors, VCC = 30 V, and R1 = 30 kΩ. Find the output resistance.

Fig. 4.31 a:

Vcc IN | IOUT R1 Icı! Q2 Q1 R2

Vcc IN | IOUT R1 Ic! Q2 Q1 R2

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