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Radiotelegrafist

Schema corector de ton cu 4558

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Schema in culori are o greseala. 

1 minute ago, Radiotelegrafist said:

Ba da,am luat in calcul si aceasta schema urmata de un 4558,dar am o nelamurire,ce valoare are pana la urma C4 si C5?

0.001uF.

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Se poate proceda astfel:

1.Se conecteaza intre +24v si masa (considerand o sursa de 24v) un grup serie de 2 resistoare de 22kohm, resistorul conectat intre punctul comun si masa (12v) va fi decuplat de un capacitor de 22uf/25v;acolo se va conecta intrarea neinversoare a integratului.

La iesire, in serie cu resistorul de 1kohm se conecteaza un capacitor de 4,7-10uf/25v,cu plusul la resistor; terminalul de minus va fi conectat la masa cu un resistor de 100kohm, pentru evitarea zgomotelor la conectare, eventual si un capacitor de 1nf in paralel (se obtine un filtru RC).

Succes.

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Acum 2 minute, Mircea a spus:

1n?

Tu faci misto?! 

Nu,eu ma gandeam la 10nf.

Acum 2 minute, Radiotelegrafist a spus:

Eu vad ca asa scrie pe schema dar nu am asa condensator la asa valoare,si nici nu am vazut.:scarpin

 

Acum 10 minute, Mircea a spus:

Trebuie musai buffer la intrare, altfel cine stie cum evolueaza corectia in functie de ce este conectat la intrare. 

 

5df6fcb7a1a64408a73a2a3f377ff819.png

Cred ca cea mai plauzibila schema ar fi aceasta.

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Acum 40 minute, Radiotelegrafist a spus:

Eu vad ca asa scrie pe schema dar nu am asa condensator la asa valoare,si nici nu am vazut.:scarpin

 

 

Acum 40 minute, Mircea a spus:

1n?

Tu faci misto?! 

 

Acum 37 minute, Radiotelegrafist a spus:

Nu,eu ma gandeam la 10nf.

 

Sigur face misto !!!

 

Intrarea inversoare la U1_2 e in aer in cc ar trebui legata la mediana celor doua rezistente. Nu stiu daca e OK asa dar, la bufferul de intrare intrarile sunt pe dos, ar trebui inversate la fel si la U1_2.

Edited by Kreator
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