Test questions

1. Draw a semiconductor CVC diode. What expression is it describedwith?

2. Why does a diode reverse current remain constant when a reverse voltage increases?

3. What defines max. and min. permissible diode temperature?

4. Namethe main parameters of a semiconductor diode.

5. What processes form capacitance in a diode?

6. Draw a high frequency and low frequency diode models.

7. What kinds of break-down can happen in a semiconductor diode?

8. How is it possible to determine voltage and current in a diode circuit using the graph-analytical method?

9. Draw a basic circuit of one half-cycle rectifier and explain how it operates.

10. How can you define a pulsation factor?

11. Draw the oscillograms of a diode voltage and current when it operates with a current and voltage oscillators at a high amplitude mode.

12. What parameter of a diode is determinant for fast-response in a pulsed diode circuit?

13. The source voltage produces 50V. Construct the parametric stabilizer to supply a circuit with the voltage of 20 V. The stabilizer maintains stabilization current of 20mA under 20 V. Calculate the resistance of a limiting resistor. What load current can the stabilizer maintain?

14. Explain how a varicap operates in a frequency controlled oscillator.

15. What are the merits of Schottky diodes?