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전자 회로 1 Lecture 5 (Diode II)

전자 회로 1 Lecture 5 (Diode II). 2009. 04. 임한조 아주대학교 전자공학부 hanjolim @ajou.ac.kr. 이 강의 노트는 전자공학부 곽노준 교수께서 08.03 에 작성한 것으로 노트제공에 감사드림 . Review. Open circuit: I D = I S Reverse-bias: I = I S - I D ~= I S Breakdown (large reverse-bias): almost constant V Forward-bias:

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전자 회로 1 Lecture 5 (Diode II)

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  1. 전자 회로 1Lecture 5 (Diode II) 2009. 04. 임한조 아주대학교 전자공학부 hanjolim@ajou.ac.kr 이 강의 노트는 전자공학부 곽노준 교수께서 08.03에 작성한 것으로 노트제공에 감사드림.

  2. Review • Open circuit: ID = IS • Reverse-bias: I = IS -ID ~= IS • Breakdown (large reverse-bias): almost constant V • Forward-bias: I = ID – IS ~=ID • Current exponentially increases Nojun Kwak

  3. Forward-bias • Why n?  n=1 or 2. fabrication dependent • Normally i >> Is  • Temperature dependence Nojun Kwak

  4. Load line Nojun Kwak

  5. Various diode modeling • Exponential model • calculator solution • Iterative analysis (see Example 3.4) • Piecewise linear model Nojun Kwak

  6. Example 3.5 VDD = 5V, R = 1kohm model: VD0 = 0.65V, rD = 20 ohm Nojun Kwak

  7. Constant voltage drop model Nojun Kwak

  8. The Small-Signal Model Nojun Kwak

  9. V-I @ bias: • Small perturbation: ( ) • Small signal resistance (incremental resistance) Taylor series approximation Nojun Kwak

  10. Zener Diode • Mostly used for voltage regulator knee current Nojun Kwak

  11. Example 3.8 Nojun Kwak

  12. Applications: Rectifier Circuits Zener diode See Chap. 3.4 Diode circuit See Chap. 3.5 RC circuit with large time constant (low pass filter) Nojun Kwak

  13. The half-wave rectifier : Peak inverse voltage PIV < VZ Nojun Kwak

  14. The full-wave rectifier Nojun Kwak

  15. The bridge rectifier Nojun Kwak

  16. The peak rectifier (with LPF: RC circuit) Ideal: no load With load If vI < vO : Time constant Nojun Kwak

  17. Nojun Kwak

  18. Limiter Circuits Soft limiting Nojun Kwak

  19. Nojun Kwak

  20. Clamping Circuits Nojun Kwak

  21. Voltage Doubler Nojun Kwak

  22. 신호 검출기로서의 pn 다이오드 Nojun Kwak

  23. 빛을 전기로, 전기를 빛으로 - 빛의 흡수 - 자연방출 - 유도방출 Nojun Kwak

  24. pn 접합 발광 다이오드 Nojun Kwak

  25. pn 접합 발광 다이오드의 응용 Left: La Cittadella, a retail and cinema complex in Kawasaki, Japan, contains a 130 foot high tower illuminated by a variety of intelligent LED lighting effects including rainbow patterns and gradual color shifts. The complex's architect is the Jerde Partnership International, Inc, and the LED illumination is by Color Kinetics. (Photo: Masami Soto.) Center: three bridges across the Clyde river in Glasgow have been illuminated with high-intensity LED lighting. Luxeon LEDs from Lumileds and Philips floodlights were used in the installations. (Photo: Philips). Right: the Gazi Technopolis in Athens, Greece, designed by Duilio Passariello of Philips LiDAC Europe. (Photo: Philips.) http://www.compoundsemiconductor.net/ Nojun Kwak

  26. pn 접합 발광 다이오드의 응용 Kawasaki's La Cittadella complex also includes a fountain illuminated by constantly changing colored LED lights. (Photo: Masami Soto.) 현대자동차 HCD-8 Concept Tourer Nojun Kwak

  27. pn 접합 수광 다이오드 Nojun Kwak

  28. + V − pn 접합 태양전지 Nojun Kwak

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