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Pot masura puterea de iesire a unui amplificator?


Guest m.technik

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Poti sa masori si cu un voltmetru tensiunea, dar trebe sa te asiguri ca semnalul e pur sinusoidal si ca frecventa acestuia nu depaseste indicatiile voltmetrului. In general, parca, voltmetrele asigura o masurare corecta pana in 400Hz; eu fac toate masuratoriile la 100Hz.

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Guest darkangelbv

este adevarat dar puterea aia o pui in asa fel incat sa fie la limita amplifului, deci unde semnalul este distorsionat :finga: (probabil ca nu intelegi ce vreau sa spun dar nu pot sa desenez :d )

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Eu tot imi sustin parerea. Sa luam in exemplu. Avem un amplif noname la care vreu sa-i masor puterea. Ii dau 50W, 75W, 100W, 150W si inca merge, cum folosesti tu detectoru de peak ca sa afli puterea amplificatorului(cea la care distorsiuniile nu depasesc 1%)?? Cu lux de amanunte daca nu te deranjez.

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daca e o schema pusa la punct, at cei care au facuto, au facut si niste masuratori pe osciloscop si au vazut ca la tensiunea de iesire x ampliful are 1% distorsiune. iei au conceput in asa fel montajul de peak, incat acesta sa se aprinda la acesta tensiunecateodata se iau si valori prestabilite in functie de tensiunea de alimentare

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Guest darkangelbv

Pui urechea la treaba :d si reglezi peack-ul la maximul la care nu ai distorsiuni sau mai bine la inceputul zonei cu distorsiuni :d (de obicei cam la 80-85% din puterea care o poate debita ampliful)

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