Consider the circuit shown in Figure P9.64. (a) The output current of the op-amp is (1.2 mathrm{~mA})

Question:

Consider the circuit shown in Figure P9.64.

(a) The output current of the op-amp is \(1.2 \mathrm{~mA}\) and the transistor current gain is \(\beta=75\). Determine the resistance \(R\).

(b) Repeat part (a) if the current is \(0.2 \mathrm{~mA}\) and the transistor current gain is \(\beta=100\).

(c) Using the results of part (a), determine the op-amp output current if the input voltage is \(6 \mathrm{~V}\).

(d) Using the results of part (b), determine the op-amp output current if the input voltage is \(4 \mathrm{~V}\).

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