1. Determine the necessary value of R2 in Figure 4 so that the circuit will oscillate. Neglect th forward resistance of the Zener diodes. (Hint: The total gain of the circuit must be 3 when the Zener diodes are conducting.) 2. Explain the purpose of R3 in Figure 4. R₁ 100 ΚΩ W www Rs 1.0 kn www D₁ 6.8 V 6.8 V R3 www 47 ΚΩ C₁ 0.015 μF C₂ 0.015 µF R₁ www 1.0 kn

1. Determine the necessary value of R2 in Figure 4 so that the circuit will oscillate. Neglect th forward resistance of the Zener diodes. (Hint: The total gain of the circuit must be 3 when the Zener diodes are conducting.) 2. Explain the purpose of R3 in Figure 4. R₁ 100 ΚΩ W www Rs 1.0 kn www D₁ 6.8 V 6.8 V R3 www 47 ΚΩ C₁ 0.015 μF C₂ 0.015 µF R₁ www 1.0 kn

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

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