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ch_05_probs

# ch_05_probs - CHAPTER Diodes and Piecewise Linear Models 5...

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CHAPTER 91 5 Diodes and Piecewise Linear Models

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92 Chapter 5: Diodes and Piecewise Linear Models PROBLEMS 5.1 In each of the two circuits shown below, evaluate the diode current, I. 5.2 Consider the circuit shown below. Assume that the diode on voltage is .7v for each diode. Sketch Vo vs. Vin in the range -10v to 10v. Give expression for Vo as a function of Vin for all regions of your plot, and provide the critical values of Vin at the boundaries of the plot regions. + - + - -10V 15V 1k I A: B: + - + - 10V 5V 1k I 3k + - Vi D1 D2 6k 3k 3k Vo
93 Analog Electronics 5.3 Consider the circuit shown below, in which the diode voltages are .7v, and the reverse breakdown voltage of the Zener is 5v. Determine expressions for Vo as a function of Vin over the range -15v to 15v, and sketch a plot of Vo vs. Vin. 5.4 Consider the circuit shown below. (a) Calculate the lowest value of the load resistor R such that the Zener diode just enters into the reverse ON mode. (b) Now, let us say that the Zener diode has the following con- straints: it can have a maximum of 100 mA flowing through it (any more and it will burn out), and a minimum of 1mA flowing through it (to be considered reverse ON). Calculate the range of values for the load resistor R such that the diode will not burn out, yet will remain in reverse ON mode. + - Vi D2 D1 5k 5k 10k Vo + - 18V Vz = 5.6v 100 R I Iz Ir

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Chapter 5: Diodes and Piecewise Linear Models 5.5 Consider the circuit shown below. (a) Find an expression for V o vs. V i when the diode is OFF. (b) Find an expression for V o vs. V i when the diode is ON. (c) Plot V o vs. V i from -10v to 10v. Label clearly any critical points on the graph, and make sure to label whether the diode is ON or OFF for each piecewise linear region shown. 5.6 For the circuit shown below plot V o vs. V i from -10v to 10v. Label clearly any critical points on the graph, and make sure to label whether the diodes are ON or OFF for each piecewise lin- ear region shown. + -
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ch_05_probs - CHAPTER Diodes and Piecewise Linear Models 5...

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