1. JFET Biasing ENGI 242/ELEC 222

2. January 2004ENGI 242/ELEC 2222 JFET Fixed Bias R G is present to limit current in case V GG is connected with wrong polarity This would forward bias the gate-source junction causing high currents, which would destroy the transistor Since GS is reverse biased, I G = 0 and V RG = 0

3. January 2004ENGI 242/ELEC 2223 DC Analysis for JFET Fixed Bias Network

4. January 2004ENGI 242/ELEC 2224 JFET Fixed Bias Plotting Shockley’s Equation

5. January 2004ENGI 242/ELEC 2225 JFET Fixed Bias Graphical Solution

6. January 2004ENGI 242/ELEC 2226 JFET Fixed Bias

7. January 2004ENGI 242/ELEC 2227 Graphical Solution for JFET Fixed Bias

8. January 2004ENGI 242/ELEC 2228 JFET Self Bias Configuration

9. January 2004ENGI 242/ELEC 2229 JFET Self Bias DC Equivalent Circuit V RG = 0 I G = 0

10. January 2004ENGI 242/ELEC 22210 Transconductance Curve

11. January 2004ENGI 242/ELEC 22211 JFET Self Bias Load Line

12. January 2004ENGI 242/ELEC 22212 JFET Self Bias

13. January 2004ENGI 242/ELEC 22213 JFET Self Bias Transconductance Curve

14. January 2004ENGI 242/ELEC 22214 Graphical Solution of JFET Self Bias

15. January 2004ENGI 242/ELEC 22215 JFET Self Bias Effect on Variation of R S

16. January 2004ENGI 242/ELEC 22216 Self Bias

17. January 2004ENGI 242/ELEC 22217 JFET Voltage Divider Bias

18. January 2004ENGI 242/ELEC 22218 JFET Voltage Divider Bias DC Analysis InputOutput

19. January 2004ENGI 242/ELEC 22219 JFET Voltage Divider Bias Load Line

20. January 2004ENGI 242/ELEC 22220 The Effect of R S on Q-point

21. January 2004ENGI 242/ELEC 22221 JFET Voltage Divider Bias

22. January 2004ENGI 242/ELEC 22222 JFET Voltage Divider Bias Q-point

23. January 2004ENGI 242/ELEC 22223 Voltage Divider Bias

24. MOSFET Biasing ENGI 242/ELEC 222

25. January 2004ENGI 242/ELEC 22225 D-MOSFET Self Bias

26. January 2004ENGI 242/ELEC 22226 Determining the Q-point for D-MOSFET Self Bias

27. January 2004ENGI 242/ELEC 22227 N Channel D-MOSFET Voltage Divider Bias

28. January 2004ENGI 242/ELEC 22228 Q Point of D-MOSFET Voltage Divider Bias

29. January 2004ENGI 242/ELEC 22229 Effect on Change in Q Point with Variation of R S With an N Channel D-MOSFET, V GS may be positive

30. January 2004ENGI 242/ELEC 22230 D-MOSFET Fixed Bias

31. January 2004ENGI 242/ELEC 22231 E-MOSFET Feedback Bias

32. January 2004ENGI 242/ELEC 22232 DC Equivalent For the E-MOSFET Feedback Bias I G = 0 V GS = V DS

33. January 2004ENGI 242/ELEC 22233 Transfer Curve for the E-MOSFET Feedback Bias

34. January 2004ENGI 242/ELEC 22234 Determining the Q-point for E-MOSFET Feedback Bias

35. January 2004ENGI 242/ELEC 22235 Q-point for the E-MOSFET Fixed Bias

36. January 2004ENGI 242/ELEC 22236 EMOS Feedback Bias Example V GSTH = 4V V GSon = 7.5V I Don = 5mA V DD = 22V

37. January 2004ENGI 242/ELEC 22237 EMOS Feedback Example

38. January 2004ENGI 242/ELEC 22238 Voltage Divider Bias for an N E-MOSFET

39. January 2004ENGI 242/ELEC 22239 Q-point for E-MOSFET Voltage Divider Bias