The parameters of the transistor in Figure (mathrm{P} 15.80) are (beta=80) and (V_{E B}) (on) (=0.6 mathrm{~V}).
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The parameters of the transistor in Figure \(\mathrm{P} 15.80\) are \(\beta=80\) and \(V_{E B}\) (on) \(=0.6 \mathrm{~V}\). The Zener diode is ideal with \(V_{Z}=6.8 \mathrm{~V}\) and the op-amp is ideal.
(a) Determine the range of load resistance \(R_{L}\) such that the load current is a constant. What is the value of the constant load current?
(b) If the Zener diode has a resistance \(r_{z}=20 \Omega\) and the power supply is in the range \(16 \leq V^{+} \leq 20 \mathrm{~V}\), determine the range in output current for \(R_{L}=5 \mathrm{k} \Omega\).
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Related Book For 
Microelectronics Circuit Analysis And Design
ISBN: 9780071289474
4th Edition
Authors: Donald A. Neamen
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