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OSCILATORI

OSCILATORI. Oscilator pretvara jednosmjernu energiju u naizmjenicnu. Od pojacavaca do oscilatora. Uslov oscilovanja. Od Ab zavisi da li ce oscilacije biti: stalne rastuce ili opadajuce. Da li ovo kolo ima Ab=1? Sta se desava kada se spoji i Rp?. Naci fosc i potreban odnos R/R1.

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OSCILATORI

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  1. OSCILATORI

  2. Oscilator pretvara jednosmjernu energiju u naizmjenicnu

  3. Od pojacavaca do oscilatora

  4. Uslov oscilovanja

  5. Od Ab zavisi da li ce oscilacije biti: stalne rastuce ili opadajuce

  6. Da li ovo kolo ima Ab=1?Sta se desava kada se spoji i Rp?

  7. Naci fosc i potreban odnos R/R1.

  8. Ucestanost oscilovanja fosc ce biti u tacki gdje je fazni pomak jednak 2*N*pi

  9. Oscilatorno kolo ima prigusene oscilacije zbog gubitaka u Rs ili Rp

  10. Negativna otpornost je izvor energije koji moze da nadoknadi gubitke na Rp i omoguci stalne oscilacije u kolu

  11. Tunel-dioda ima negativnu otpornost

  12. Oscilator sa tunelskom diodom

  13. Sema oscilatora sa tunelnom diodom

  14. Pojacavac sa tunelnom diodom

  15. Tinjalica, takodje, ima negativnu otpornost, pa se i sa njom moze napraviti oscilator

  16. Fig.4.65 Common-emitter characteristics. Note that the horizontal scale is expanded around the origin to show the saturation region in some detail.

  17. Oscilator se moze napraviti i koriscenjem negativne otpornosti koju BJT ima u rezimu proboja sa otvorenom bazom

  18. Oscilator sa Vinovim mostom

  19. Oscilatori 2 (regulacija amplitude oscilovanja)

  20. Fig. 12.10 Block diagram of the active-filter tuned oscillator.

  21. Fig. 12.11 Practical implementation of the active-filter tuned oscillator.

  22. Svaki pojacavac ima nelinearnost tipa zasicenja

  23. Nelinearnost se moze dodati u oscilator i pomocu kola sa 2 Cenerove diode

  24. RC oscilator - amplituda je odredjena granicama zasicenja OP

  25. Naponi u cvorovima 1, 2, 3 i 4

  26. Zaletanje oscilacija RC oscilatora (sa pomakom faze)

  27. Gravitacijom pogonjen klima uredjaj za cipelu

  28. Fig. 12.3(a) A popular limiter circuit. (b) Transfer characteristic of the limiter circuit; L- and L+ are given by Eqs. (12.8) and (12.9), respectively. (c) When Rfis removed the limiter turns into a comparator with characteristics shown.

  29. Fig. 12.5 A Wien-bridge oscillator with a limiter used for amplitude control.

  30. Fig. 12.6 A Wien-bridge oscillator with an alternative method for amplitude stabilization.

  31. Fig. 12.8 Practical phase-shift oscillator with a limiter for amplitude stabilization.

  32. Fig. 12.9(a) A quadrature oscillator circuit. (b) equivalent circuit at the input of op amp 2.

  33. http://www.ccsr.uiuc.edu/People/gmk/Projects/ChuaSoundMusic/ Chua's Oscillator: Applications of Chaos to Sound and Music

  34. Chua oscilator http://www.ccsr.uiuc.edu/People/gmk/Projects/ChuaSoundMusic/

  35. Nelinearna otpornost NR

  36. Moto kornetpatentom zasticen uredjaj za okretanje kugle sladoleda dok se lize jezikom

  37. RC oscilatori

  38. RC oscilatori sa Nortonovim OP

  39. Regulacija amplitude oscilacija pomocu termozavisnog otpora Rs

  40. Automatska regulacija amplitude

  41. Oscilatori u 3 tacke (BCE ili GDS)

  42. Model za male signale za oscilator u 3 tacke

  43. Neodredjenost amplitude kod oscilatora => determinanta=0 => =>

  44. Oscilator u 3 tacke - primjer 1

  45. Oscilator u 3 tacke - primjer 2

  46. Oscilator u 3 tacke - primjer 3

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