1. PN Junction Diode ENGI 242 ELEC 222

2. January 2004ENGI 242/ELEC 2222 PN Junction Diode Diode Model Analysis –Ideal –Approximation –Exact Diode Specification Sheets Diode Resistance –Static Resistance R D –Dynamic Resistance r d –Average Resistance r dav Diode Characteristic Curves Simulation

3. January 2004ENGI 242/ELEC 2223 Ideal diode: (a) symbol; (b) characteristics.

4. January 2004ENGI 242/ELEC 2224 Conduction state of the ideal diode based on the applied bias

5. January 2004ENGI 242/ELEC 2225 Typical Diode Curves

6. January 2004ENGI 242/ELEC 2226 Forward Bias Curve is Exponential

7. January 2004ENGI 242/ELEC 2227 Diode Response vs Temperature

8. January 2004ENGI 242/ELEC 2228 Semiconductor Diode Characteristics

9. January 2004ENGI 242/ELEC 2229 Determining the dc Resistance

10. January 2004ENGI 242/ELEC 22210 r d - the Dynamic (ac) Resistance

11. January 2004ENGI 242/ELEC 22211 Determining r d - the ac Resistance at Q

12. January 2004ENGI 242/ELEC 22212 Determining r d - the ac Resistance

13. January 2004ENGI 242/ELEC 22213 r dav – the Average ac Resistance Draw line through 2 points +V P and -V P

14. January 2004ENGI 242/ELEC 22214 Circuit to display the V - I characteristics

15. January 2004ENGI 242/ELEC 22215 PSpice Model Editor – D1N914 Parameters

16. January 2004ENGI 242/ELEC 22216 DC Sweep Simulation Settings

17. January 2004ENGI 242/ELEC 22217 PSpice plot of forward bias at 25°C

18. January 2004ENGI 242/ELEC 22218 DC Sweep Simulation Settings Note First select Edit Pspice Model, and change IBV to 10

19. January 2004ENGI 242/ELEC 22219 PSpice generated plot characteristics at 25°C This Probe output shows both forward and reverse breakdown

20. January 2004ENGI 242/ELEC 22220 PSpice Netlist Output Part 1

21. January 2004ENGI 242/ELEC 22221 PSpice Netlist Output Part 2

22. Diode Circuit Analysis ENGI 242 ELEC 222

23. January 2004ENGI 242/ELEC 22223 Diode Circuit Analysis –Graphical Analysis using Loadlines –Analytical Analysis using KVL and KCL LEDs Zener Diodes Diode Resistance –Static Resistance R D –Dynamic Resistance r d –Average Resistance r dav Diode Characteristic Curves Simulation

24. January 2004ENGI 242/ELEC 22224 Series Diode Configuration

25. January 2004ENGI 242/ELEC 22225 Drawing a Load Line to Find the Q Point.

26. January 2004ENGI 242/ELEC 22226 Diode Circuit and Characteristics.

27. January 2004ENGI 242/ELEC 22227 Load Line Example

28. January 2004ENGI 242/ELEC 22228 Determining the Unknown Network Quantities

29. January 2004ENGI 242/ELEC 22229 Network Example

30. January 2004ENGI 242/ELEC 22230 Determining the Unknown Network Quantities

31. January 2004ENGI 242/ELEC 22231 Network Example

32. January 2004ENGI 242/ELEC 22232 Zener Diode Equivalents

33. January 2004ENGI 242/ELEC 22233 Basic Zener Regulator

34. January 2004ENGI 242/ELEC 22234 Determining the State of the Zener

35. January 2004ENGI 242/ELEC 22235 The Zener Equivalent Circuit Operation

36. January 2004ENGI 242/ELEC 22236 Zener Diode Regulator

37. January 2004ENGI 242/ELEC 22237 Determining V for the Regulator

38. January 2004ENGI 242/ELEC 22238 Q-Point for the Network

39. January 2004ENGI 242/ELEC 22239 Network in the conducting state