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OEM3-RO-CIRCUITE ELECTRONICE

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About this collection

The ANR bank contains many sets with original names and codes, including navigation, safety and equipment topics. Select a module by name or use question search.

“ANR — Electrotehnica-OEM3 — OEM3-RO-CIRCUITE ELECTRONICE” contains 8 questions across 1 collection.

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Sample questions and answers

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Amplificarea transadmitanta a unui amplificator transadmitanta se masoara in

One correct answer

  • dB
  • Ohm
  • S✓ Correct answer
  • m
Un amplificator operational lucrand in bucla inchisa (cu reactie negativa) are amplificarea in tensiune intotdeauna:

One correct answer

  • unitara
  • subununitara
  • determinata de reteaua de reactie✓ Correct answer
  • foarte mare
Se aplica un semnal sinusoidal la intrarea unui amplificator functionand in clasa B. Unghiul de conductie al elementului amplificator este:

One correct answer

  • 360grd;
  • cuprins intre 180 grd si 360grd;
  • 180grd✓ Correct answer
  • mai mic de 180grd;
in practica, sunt tranzistoarele din amplificatoarele in contratimp clasa B au jonctiunea baza - emitor prepolarizata direct astfel ca prin fiecare tranzistor sa circule un mic curent de repaus. Despre aceste amplificatoare se spune ca lucreaza in clasa AB. Prin aceasta se urmareste:

One correct answer

  • marirea randamentului;
  • marirea amplificarii in putere
  • marirea benzii de trecere
  • reducerea distorsiunii de trecere✓ Correct answer
Se aplica un semnal sinusoidal la intrarea unui amplificator functionand in clasa A. Unghiul de conductie al elementului amplificator este:

One correct answer

  • 360grd;✓ Correct answer
  • cuprins intre 180 grd si 360grd;
  • 180grd
  • mai mic de 180grd;

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