We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has two integrated circuits, one of which is a preamplifier stage. The power supply must be dual.
This circuit provides signals in phase with the input and with the phase inverted. The circuit was...
This is one of the many applications of the 555. We found it in the November 1992 Radio...
The circuit presented was found in a Japanese magazine in 1973. The circuit uses transistors of...