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ELFORUM - Forumul Electronistilor
grosu99

Sonda demodulatoare

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Schema este interesanta, merita sa fie pastrata.

 

Nu stiu cat de util este semnalul sinusoidal la calibrare. Depinde ce calibrezi. N-am citit ce zice in articol (nu stiu germana), dar daca este pentru radioreceptoare, sinusoida curata se justifica. Insa ar trebui frecventa reglabila.

Pentru calibrarea osciloscoapelor (baza de timp si amplificarea pe Y) se foloseste semnal dreptunghiular (oscilator XT CMOS + divizoare de frecventa zecimale). 

 

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Frumoasa lucrare ...

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Oare se poate realiza si cu MMIC-uri  in loc de acele amplificatoare de banda larga ?

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Eu cred ca da . Prin tatonari de valori si schema , cu datasheet - ul si net - ul la indemana . De altfel , la toate montejele de Rf , mai ales la alea de " mai sus " , nu cred ca merge altfel . Ma rog , eu n - am reusit altfel . La unele n - am reusit de loc . Am luat - o de la cap , cu alta schema si abordare . 

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