a) To what value R must be adjusted in the following circuit to make IZ = 70 mA. Assume VZ =20 V at 65 mA and ZZ = 23 Ω. What is the Zener voltage at 70o C, if it has a positive TC of 0.08 %/oC.?
a) To what value R must be adjusted in the following circuit to make IZ = 70 mA. Assume VZ =20 V at 65 mA and ZZ = 23 Ω. What is the Zener voltage at 70o C, if it has a positive TC of 0.08 %/oC.?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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a) To what value R must be adjusted in the following circuit to make IZ = 70 mA. Assume VZ =20 V at 65 mA and ZZ = 23 Ω.
What is the Zener voltage at 70o C, if it has a positive TC of 0.08 %/oC.?
b) Using a Complete diode model, find the diode current (ID), diode voltage (VD), and output voltage (Vo) for the diode circuit shown below. Given that: Vs = 20 V, RL=3 kΩ , Barrier Potential VF = 0.3 V , and r’d = 70 Ω.
If the diode was reversed and IR = 200 µA, Determine the diode reverse voltage (VR)

Transcribed Image Text:a) To what value R must be adjusted in the following dircuit to make L 70 mA. Assume V,
=20 V at 65 mA and Z, = 23 Q.
What is the Zener voltage at 70 C, if it has a positive TC of 0.08 %/C.?
R
24 V
b) Using a Complete diode model, find the diode current (I,), diode voltage (V,), and output
voltage (Vo) for the diode circuit shown below. Given that: V = 20 v, R =3 kQ , Barrier
Potential V. = 0.3 V, and r', = 70 Q.
If the diode was reversed and I,
= 200 uA, Determine the diode reverse voltage (V,)
+ VD -
lo
RL
Vo
Vs
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