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vijelie02

oscilatii la un amplificator

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Buna ziua,

As vrea sa aflu si eu pe intelesul meu de amator ce inseamna a oscila un amplificator.

- cum imi dau seama ca oscileaza

- cum putem rezolva acest fenomen

- ce urmari pot avea oscilatiile unui amplificator

 

Multumesc,

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Acele oscilatii se vad daca ai sarcina(difuzorul) conectat sau nu?

- Daca finalii se incalzesc in gol asta inseamna un curent de mers in gol mult prea mare. Chiar daca acest curent a fost reglat corespunzator cu intrarea la masa e posibil ca se ambaleze(oscileze) amplificatorul cu intrarea in aer(gol)? Asta inseamna ca acel curent de mers in gol incepe sa creasca destul de mult.

- Asta stiam mai de mult ca toate componentele electronice(si nu numai) contin fum. Daca au pierdut fumul inseamna ca s-au stricat. :rofl: 

Multumesc,

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Buna ziua,

As vrea sa aflu si eu pe intelesul meu de amator ce inseamna a oscila un amplificator.

- cum imi dau seama ca oscileaza

- cum putem rezolva acest fenomen

- ce urmari pot avea oscilatiile unui amplificator

 

Multumesc,

-iti dai seama daca oscileaza cu osciloscopul sau finalii se incing fara semnal

-montezi pe tranzistorii de la intrare condensatori intre colector si baza de zeci sau sute de pf.

-se ard finali si prefinali

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