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donpetru

Scheme de amplificatoare audio

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amplificator 400 w  driver dx 400 megatech- vietnam

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mai are cineva schema de la amplificatorul acesta? Amplificator audio de 20W, 8 Ohmi, +40VDC, THD=0,2% (cu 2N3055)

 

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Un amplificator audio hibrid cu tuburi & AO:

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Amplificator audio stereo 20W cu corector de ton fain:

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Germaniu:

 

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Un amplificator cu trei bucle de reactie si protectie la scurtcircuit. Gurile rele zic ca de aici s-a inspirat NP c?nd a inventat F7. Se poate converti ?n configuratie inversoare si exista si o varianta cu alimentare simpla. Pentru reducerea ?n continuare a distorsiunilor, se poate adauga ?nca o bucla de reactie cu un operational suplimentar.

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O completare la circuitul de mai sus (eventual mutati textul acolo):
Etajul final este un convertor de impedanta negativa asa ca etajul final nu primeste curent din operational ci ?i furnizeaza acestuia curent. Spre deosebire de schemele clasice, iesirea operationalului nu functioneaza ?n cadranele 1 si 3 ci ?n cadranele 2 si 4.

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