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Merenje THD malih vrednosti sa osciloskopom

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Merenje THD malih vrednosti sa osciloskopom
mikikg Offline
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03-25-2015, 01:48 PM (This post was last modified: 03-27-2015, 12:16 AM by mikikg.)
Interesuje me metoda merenja THD pomocu osciloskopa koja je prikazana u dva dostavljena fajla ali na Audio Power AMP (>1W).

Primer kako izgleda to merenje za OP kao komponentu gde su iskoristili sam IC kao pojacavac "nelinearne greske".

[Image: attachment.php?aid=13421]


Ovo je rezultat npr za LM4562 gde je nelinearnost reda 0.025ppm (2. harmonik od 1kHz na -159dB).

[Image: attachment.php?aid=13422]

Kako bi izgledao konkretno setup za single-ended i bridge Audio pojacavac kao uredjaj/PCB?


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Merenje THD malih vrednosti sa osciloskopom - by mikikg - 03-25-2015, 01:48 PM

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