We found this circuit in an old documentation, but the components used offer no difficulty in obtaining it. The CMOS integrated circuits are powered by a 6V supply.
This filter rejects signals below 300 Hz and signals above 3000 Hz, being used in...
The circuit presented was found in the ON Semiconductor manual. In it we have a way to protect the...
I found this circuit in an English magazine from July 1982. The circuit is still viable because all...