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Question 9.7: Analysis Using a Piecewise-Linear Model Use the circuit mode...

Analysis Using a Piecewise-Linear Model
Use the circuit models found in Example 9.6 to solve for the current in the circuit of Figure 9.20(a).

9.20
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Since the 3-V source has a polarity that results in forward bias of the diode, we assume that the operating point is on line segment A of Figure 9.19. Consequently, the equivalent circuit for the diode is the one for segment A. Using this equivalent circuit, we have the circuit of Figure 9.20(b). Solving, we find that i_D = 80 \text{ mA}.

9.19

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