Fundamentals-of-Microelectronics-Behzad-Razavi.pdf

I in out v d 2 r 1 1 d i in out v d 2 r 1 1 d i in

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I in out V D 2 R 1 1 D I in out V D 2 R 1 1 D I in out V D 2 R 1 1 D I in out V D 2 R 1 1 D (c) (a) (b) (d) (e) (f) (g) (h) Figure 3.73 (a) (b) out V R 1 V in 1 D R 2 out V V in R 2 1 D R 1 Figure 3.74 24. Plot the currents flowing through and as a function of for the circuits of Fig. 3.74. Assume constant-voltage diode model. 25. Plot the input/output characteristic of the circuits illustrated in Fig. 3.75 assuming a constant- voltage model. 26. Plot the currents flowing through and as a function of for the circuits of Fig. 3.75. Assume constant-voltage diode model. 27. Plot the input/output characteristic of the circuits illustrated in Fig. 3.76 assuming a constant- voltage model. 28. Plot the currents flowing through and as a function of for the circuits of Fig. 3.76. Assume constant-voltage diode model. 29. Plot the input/output characteristic of the circuits illustrated in Fig. 3.77 assuming a constant- voltage model and V.
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BR Wiley/Razavi/ Fundamentals of Microelectronics [Razavi.cls v. 2006] June 30, 2007 at 13:42 118 (1) 118 Chap. 3 Diode Models and Circuits 1 D R 1 R 2 in V out V V B 1 D R 1 R 2 in V out V V B R 2 in V out V V B R 1 1 D 1 D R 1 in V out V R 2 V B (c) (a) (b) (d) Figure 3.75 D out V R 2 R 1 in V D 2 1 D R 1 out V R 2 D 2 in V 1 D R 1 in V 1 D 2 R 2 out V D in V 1 R D 2 R 2 out V 1 1 D R 1 in V D 2 R 2 out V (c) (a) (b) (d) (e) Figure 3.76 30. Plot the currents flowing through and as a function of for the circuits of Fig. 3.77. Assume constant-voltage diode model. 31. Beginning with mV for each diode, determine the change in if changes from V to V for the circuits shown in Fig. 3.78. 32. Beginning with mV for each diode, calculate the change in if changes from 3 mA to 3.1 mA in the circuits of Fig. 3.79. 33. In Problem 32, determine the change in the current flowing through the 1-k resistor in each circuit. 34. Assuming , plot the output waveform of the circuit depicted in Fig. 3.80 for an initial condition of V across . Assume V. 35. Repeat Problem 34 for the circuit shown in Fig. 3.81. 36. Suppose the rectifier of Fig. 3.32 drives a 100- load with a peak voltage of 3.5 V. For a 1000- F smoothing capacitor, calculate the ripple amplitude if the frequency is 60 Hz.
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BR Wiley/Razavi/ Fundamentals of Microelectronics [Razavi.cls v. 2006] June 30, 2007 at 13:42 119 (1) Sec. 3.6 Chapter Summary 119 1 D V B D R 1 in V 1 D R 2 out V D 2 R 2 V B R 1 in V D out V D 2 R 1 in V D out V R 2 V B D 2 in V V B R 1 R 2 out V (c) (a) (b) (d) 1 1 1 Figure 3.77 1 D in V R out V = 1 k 1 1 D in V R out V = 1 k 1 D 2 1 D in V out V D 2 1 k R 1 in V out V D 2 2 k 1 k R 1 R 2 (c) (a) (b) (d) Figure 3.78 37. A 3-V adaptor using a half-wave rectifier must supply a current of 0.5 A with a maximum ripple of 300 mV. For a frequency of 60 Hz, compute the minimum required smoothing capacitor. 38. Assume the input and output grounds in a full-wave rectifier are shorted together. Draw the output waveform with and without the load capacitor and explain why the circuit does not operate as a rectifier.
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