Electrical Engineering: Principles & Applications (7th Edition)
7th Edition
ISBN: 9780134484143
Author: Allan R. Hambley
Publisher: PEARSON
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Chapter 9, Problem 9.7P
Repeat Problem P9.6 for the circuits shown in Figure P9.7
Figure P9.7
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Find voltage vL in the circuit of Figure P9.16where D is an ideal diode, for positive andnegative values of vS . Sketch a plot of vLversus vS . Use the offset diode model.
In Figure P9.20, assume a sinusoidal source Vs = 50 V rms, R = 170, and V = 0.6 V. Use the
offset diode model for a silicon diode to determine: (a) the maximum forward current and (b) the
peak reverse voltage across the diode.
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O A Zener diode ideal i-v characteristic is shown in
Figure P9.60(a). Given a Zener voltage, Vz of 7.7 V,
find the output voltage Vout for the circuit of Figure
P9.60(b) if Vs is:
a. 12 V
b. 20 V
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- Voltage-doubler circuit. Consider the circuit of Figure P9.71. The capacitors are very large, so they discharge only a very small amount per cycle. (Thus, no ac voltage appears across the capacitors, and the ac input plus the dc voltage of C1 must appear at point A.) Sketch the voltage at point A versus time. Find the voltage across the load. Why is this called a voltage doubler? What is the PIV across each diode?arrow_forwardThe Zener diode in the simple voltage regulator circuit shown in Figure P9.53 is a 1N5231B. The source voltage is obtained from a DC power supply. It has a DC and a ripple component vs = Vs + V, where: V, = 250 mV IL = 65 mA r, = 17 2 Vs = 20 V %3D R= 220 2 V = 5.1 V V, = 5.1 V Prated = 0.5 W iz min = 10 mA Determine the maximum rated current the diode can handle without exceeding its power limitation. T's RLarrow_forwardSketch the transfer characteristic (vo versus vin) to scale for the circuit shown in FigureP9.66 . Allow vin to range from -5 V to +5 V and assume that the diodes are ideal.arrow_forward
- Sketch the transfer characteristic (vo versus vin) for the circuit shown in Figure P9.67, carefully labeling the breakpoint and slopes. Allow vin to range from -5 V to +5 V and assume that the diodes are ideal.arrow_forwardSketch i versus v to scale for each of the circuits shown in Figure P9.39. Assume that the diodes are ideal and allow v to range from −10 V to +10 V.arrow_forwardDetermine the value of iD for each of the circuits shown in Figure T9.1. The characteristic for the diode is shown in Figure 9.8 on page 465.arrow_forward
- 5 In the simple voltage regulator circuit shown in Figure P9.53, R must maintain the Zener diode current within its specified limits for all values of the source voltage, load current, and Zener diode voltage. Determine the minimum and maximum values of R which can be used. V, = 5 V+ 10% iz min = 3.5 mA Vs = 12 +3 V 1, = 15 2 izmax = 65 mA IL = 70+ 20 mAarrow_forward0 In Figure P9.20, a sinusoidal source of 50 V ms drives the circult. Use the offset diode model for a silicon diode. a. What is the maximum forward current? b. What is the peak inverse voltage across the diode? Vy=0.7 V 50 Vms 220 2arrow_forwardConsider the circuit of Figure P9.9. Determinewhether the diode is conducting or not. Assume thatthe diode is an ideal diode. Consider: VC = 15 V (Ignore the value in the figure)arrow_forward
- Consider the circuit shown in Figure P9.69, in which the RC time constant is very long compared with the period of the input and in which the diode is ideal. Sketch vo(t) to scale versus time.arrow_forwardThe diode shown in Figure P9.48 can be represented by the model of Figure 9.23 on page 475, with Vf = 0.7 V. a. Assume that the diode operates as an open circuit and solve for the node voltages v1 and v2. Are the results consistent with the model? Why or why not? b. Repeat part (a), assuming that the diode operates as a 0.7-V voltage source.arrow_forwardDesign a clamp circuit to clamp the negative extreme of a periodic input waveform to -5 V. Use diodes, Zener diodes, and resistors of any values required. Assume a 0.6-V forward drop for all diodes and that the Zener diodes have an ideal characteristic in the breakdown region. Power-supply voltages of ±15 V are available. Repeat Problem P9.75 for a clamp voltage of +5 V.arrow_forward
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