42. a. Deternmine VL. I, Iz, and Ig for the network of Fig. 2.186 if R 180 0. b. Repeat part (a) if R 470 2. C. Determine the value ofR, that will establish maximum power conditions for the 7anor dindo

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*42. a. Determine VL. IL, Iz, and Ig for the network of Fig. 2.186 if RL 180 0.
b. Repeat part (a) if R 470 2.
c. Determine the value of R, that will establish maximum power conditions for the Zener diode.
d. Determine the minimum value of R, to ensure that the Zener diode is in the "on" state.
Rs
220 2
TR
Vz 10 V
RL
%3D
20 V
= 400 mW
PZmat
FIG. 2.186
Problem 42.
*43. a. Design the network of Fig. 2.187 to maintain V at 12 V for a load variation (I,) from 0 mA
to 200 mA. That is, determine Rs and Vz.
b. Determine Pz max
for the Zener diode of part (a).
*44. For the network of Fig. 2.188, determine the range of V, that will maintain V at 8 V and not
exceed the maximum power rating of the Zener diode.
Rs
16 Vo
91 2
Vz 8 V
0.22 k2
Vz
RL
RL
= 400 mW
PZ max
FIG. 2.188
FIG. 2.187
Problems 44 and 52.
Problem 43.
Transcribed Image Text:*42. a. Determine VL. IL, Iz, and Ig for the network of Fig. 2.186 if RL 180 0. b. Repeat part (a) if R 470 2. c. Determine the value of R, that will establish maximum power conditions for the Zener diode. d. Determine the minimum value of R, to ensure that the Zener diode is in the "on" state. Rs 220 2 TR Vz 10 V RL %3D 20 V = 400 mW PZmat FIG. 2.186 Problem 42. *43. a. Design the network of Fig. 2.187 to maintain V at 12 V for a load variation (I,) from 0 mA to 200 mA. That is, determine Rs and Vz. b. Determine Pz max for the Zener diode of part (a). *44. For the network of Fig. 2.188, determine the range of V, that will maintain V at 8 V and not exceed the maximum power rating of the Zener diode. Rs 16 Vo 91 2 Vz 8 V 0.22 k2 Vz RL RL = 400 mW PZ max FIG. 2.188 FIG. 2.187 Problems 44 and 52. Problem 43.
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