Supliment: 50 scheme electronice si montaje practice
Pentru o auditie de inalta fidelitate, chiar daca se utilizeaza discuri de foarte buna calitate sunt necesare corectii ale benzii audio redate. Un montaj care aproximeaza destul de bine o caracteristica de corectie tip RIAA se da in fig. 1, iar curba de raspuns in fig. 2. In compunerea schemei intra un amplificator operational tip 74l, in a carui bucla de reactie negative sunt conectate doua celule RC (R4C3 si R5C4) inseriate.
Impedanta de intrare a preamplificatorului este de 500KΩ fiind determinata in principal de R1 in paralel cu R2. Deasemenea, divizorul R1-R2 polarizeaza alimentarea circuitului integrat de la o sursa simpla de 12Vcc.
Privacy & Cookies Policy
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.