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JFET Biasing

JFET Biasing. ENGI 242/ELEC 222. 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.

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JFET Biasing

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  1. JFET Biasing ENGI 242/ELEC 222

  2. JFET Fixed Bias RG is present to limit current in case VGG 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, IG = 0 and VRG = 0 ENGI 242/ELEC 222

  3. DC Analysis for JFET Fixed Bias Network ENGI 242/ELEC 222

  4. JFET Fixed Bias Plotting Shockley’s Equation ENGI 242/ELEC 222

  5. JFET Fixed Bias Graphical Solution ENGI 242/ELEC 222

  6. JFET Fixed Bias ENGI 242/ELEC 222

  7. Graphical Solution for JFET Fixed Bias ENGI 242/ELEC 222

  8. JFET Self Bias Configuration ENGI 242/ELEC 222

  9. JFET Self Bias DC Equivalent Circuit IG = 0 VRG = 0 ENGI 242/ELEC 222

  10. Transconductance Curve ENGI 242/ELEC 222

  11. JFET Self Bias Load Line ENGI 242/ELEC 222

  12. JFET Self Bias ENGI 242/ELEC 222

  13. JFET Self Bias Transconductance Curve ENGI 242/ELEC 222

  14. Graphical Solution of JFET Self Bias ENGI 242/ELEC 222

  15. JFET Self Bias Effect on Variation of RS ENGI 242/ELEC 222

  16. Self Bias ENGI 242/ELEC 222

  17. JFET Voltage Divider Bias ENGI 242/ELEC 222

  18. JFET Voltage Divider Bias DC Analysis Input Output ENGI 242/ELEC 222

  19. JFET Voltage Divider Bias Load Line ENGI 242/ELEC 222

  20. The Effect of RS on Q-point ENGI 242/ELEC 222

  21. JFET Voltage Divider Bias ENGI 242/ELEC 222

  22. JFET Voltage Divider Bias Q-point ENGI 242/ELEC 222

  23. Voltage Divider Bias ENGI 242/ELEC 222

  24. MOSFET Biasing ENGI 242/ELEC 222

  25. D-MOSFET Self Bias ENGI 242/ELEC 222

  26. Determining the Q-point for D-MOSFET Self Bias ENGI 242/ELEC 222

  27. NChannel D-MOSFET Voltage Divider Bias ENGI 242/ELEC 222

  28. Q Point of D-MOSFET Voltage Divider Bias ENGI 242/ELEC 222

  29. Effect on Change in Q Point with Variation of RS With an N Channel D-MOSFET, VGS may be positive ENGI 242/ELEC 222

  30. D-MOSFET Fixed Bias ENGI 242/ELEC 222

  31. E-MOSFET Feedback Bias ENGI 242/ELEC 222

  32. DC Equivalent For the E-MOSFET Feedback Bias IG = 0 VGS = VDS ENGI 242/ELEC 222

  33. Transfer Curve for the E-MOSFET Feedback Bias ENGI 242/ELEC 222

  34. Determining the Q-point for E-MOSFET Feedback Bias ENGI 242/ELEC 222

  35. Q-point for the E-MOSFET Fixed Bias ENGI 242/ELEC 222

  36. EMOS Feedback Bias Example VGSTH = 4V VGSon = 7.5V IDon = 5mA VDD = 22V ENGI 242/ELEC 222

  37. EMOS Feedback Example ENGI 242/ELEC 222

  38. Voltage Divider Bias for an N E-MOSFET ENGI 242/ELEC 222

  39. Q-point for E-MOSFET Voltage Divider Bias ENGI 242/ELEC 222

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