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RANGAKAIAN DIODA

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  1. RANGAKAIAN DIODA Hamzah Afandi, Antonius Irianto dan Betty Savitri Sources: Millman, Jacob, Grabel, Arvin, Microelectronics, Mc. Graw Hill Int. Ed., 1994. Robert Boylestad, Louis Nashelsky Sixth Edition; Prentice Hall,1997

  2. Review: p-n JunctionVolt-Ampere Characteristic of Diode  = type of semiconductor factor ( for Si = 2, Ge = 1 ) VT = Volt-Equivalent of Temperature = 25 mV (at 293 oK) ID VZ IS VD V (0.6 - 0.7 for Si) (0.2 - 0.3 for Ge)

  3. R VAA + R VD ID _ Quiscent Point IDQ VD VDQ VAA Review: p-n JunctionLoad-line Concept + ID VAA _

  4. ID _ + VD K K K K K A A A A A Analysis of Diode Circuit:Ideal Diode Approach Reverse ID Forward/Active VD

  5. Diode Circuit: +5V +9V 1K 10K 10K 1K -5V -9V Simple diode circuit analysis (d) (c) (a) (b)

  6. Diode Circuit: Simple diode circuit analysis +10V Q: V12 = ….. ? (D = ON/OFF ?) Assumption that Diode is OFF R3 R1 4K 2K V1 V2 D R4 6K 2K R2 Diode is CORRECTLY OFF!

  7. Diode Circuit: 0V A LOGIC GATE VI VO +5V +6V +5V 0V 0V RS +6V VI VO D1 RL

  8. Diode Circuit: +6V VA VB +6V A LOGIC GATE VB VA VO +5V +6V +6V +5V 0V +6V 0V +6V 0V 0V RS 0V 0V 0V D1 VO RL D2 It's an 2 inputs AND-GATE! (Hey....How about 5 inputs?)

  9. Diode Circuit: Vi Vo 20V + 20V 10V Clipping Circuit R1 D 10V

  10. Diode Circuit: Vi Vo 20V 20V -10V Clipping Circuit R1 D + 10V

  11. Diode Circuit: Vi Vo 20V 20V 10V -10V Clipping Circuit R1 D1 D2 + 10V 10V

  12. Diode Circuit: Diodes as Rectifiers (Half Wave Rect.) Vo D RL

  13. Diode Circuit: Diodes as Rectifiers (Full Wave Rect.) D1 Vo RL D2

  14. Diode Circuit: Diodes as Rectifiers (Full Wave Rect.) Vo D1 D2 D3 D4 RL

  15. Diode Circuit: C Diodes as Rectifiers (Full Wave Rect. + Filter) Vo D1 D2 D3 D4 RL

  16. Diode Circuit: Diodes as Rectifiers (Voltage Regulator Concept) Vr = Ripple Voltage (RMS),VDC = DC Output Voltage VNL = DC Voltage at no-load VFL = DC Voltage at full-load

  17. Diode Circuit: Vi Peak Detectors D C R VO

  18. Diode Circuit: D C R Vi AM Demodulator Vo

  19. Diode Circuit: Vi VSP + Voltage Doubler 2V SP _ + VO = 2 VSP D2 C1 + D1 _ C2

  20. Diode Circuit: +Vs +Vs i + i = 0 _ VC v v _ + t Switching Flyback +Vs L L L VSW D + _ SW SW SW C t

  21. Diode Circuit: +Vs i + _ Flyback Prevention +Vs _ i L L D D + SW SW

  22. ID=(VD-V )/RF 1/Rf VZ IS V 1/Rr ID=(VD/RR) - IS Analysis of Diode Circuits:Large-Signal Model (Piecewise Linear Approach) ID VD

  23. Analysis of Diode Circuits:Large-Signal Model (Piecewise Linear) A A A A Rf Rr IS V K K K K K ID=(VD-V )/RF ID=(VD/RR) - IS Forward-Biased Diode (On) Reversed-Biased Diode (Off)

  24. + Analysis of Diode Circuits:Characteristic Transfer Curve Method R1 vo Vo D 20V 1/Rf 10V vi 10V 1/Rr Vi 20V

  25. + -10 10 Analysis of Diode Circuits:Using PWL & Characteristic Transfer Curve Solve For: vi D1 5K vO D2 t 5K 5V 5V

  26. CALCULATIONEXAMPLES Given in class