Found in a 1980s documentation, this amplifier uses an integrated circuit that is not easy to obtain now as it is of the era. The circuit is intended for FI ceramic filter circuits.
This oscillator produces a rectangular signal in the range of 100 Hz to 1k Hz but with the change of...
This circuit was obtained in a 1999 English magazine. We can easily assemble it with a BD136 or...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...