Supliment: 50 scheme electronice si montaje practice
In fig. 1 este prezentat un corector tip Baxandall cu o buna eficacitate in gama 10Hz-20KHz. Dupa cum se poate vedea in fig.2 caracteristica de corectie prezinta un punct de zero la frecventa de 1KHz. La frecventele mai joase preaccentuarea si dzeaccentuarea ating 17dB, respectiv 13dB. Similar la frecventele inalte valoarea maxima este de +12dB iar cea minima de cca. -13dB fata de referinta.
Montajul contine un amplificator operational tip 741 in a carui bucla de reactie sunt introduse circuitele de corectie tip RC. Pentru o comanda comoda, potentiometrele sunt cu variatie liniara a rezistentei. In vederea pastrarii puritalii semnalului se recomanda introducerea intregii retele de corectie intr-o cutie metalica.
Divizorul R1-R2 asigura polarizarea intrarii neinversoare, ceea ce duce la utilizarea unei surse de alimentare simple de 12Vcc.
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