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Guest George Dumitru_250880

Amplificator mica putere

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Guest George Dumitru_250880


Am primit o tema la fizica sa construiesc un amplificator semnal microfon cu puterea pe sarcina de minim 0.5W.

Eu m-am gandit sa fac o reactie negativa iar apoi un LM 386.(vezi in atach).

Bun, intrebarile mele sunt:

Cum pot asigura o banda de 20Hz - 20kHz?

Cum pot asigura THD <=10%?

Cum pot avea la iesire 5W fara sa imi ia foc operationalul, mai exact cum pot face un etaj la iesire sa suporte tensiuni mai mari ?


Vreau raspunsuri concrete(cu scheme daca se poate).



//edit Simulare: Vin = 10mV


Edited by George Dumitru_250880
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Domeniul de frecventa il asiguri prin alegerea pieselor corect. Cauti in datasgeet-ul fiecarei piese si vezi daca se preteaza aplicatiei tale. Puterea pe care o vrei, daca e mai mare decat poate chipul, o poti obtine folosind tranzistor/tranzistori cu o putere mai mare. Bagi ce iese din chip in baza unui tranzistor si se va intampla minunea.

Edited by Guest
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Guest George Dumitru_250880

Ce etaj se recomanda inainte de sarcina ? Cu o reactie negativa si un LM 386 am la iesire 5.21V(la intrare un semnal sinusoidal cu A = 10mV si f = 100Hz.)

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