Using a 4046 PLL we found this circuit in the December 1989 issue of Radio Electronics magazine. The circuit operates at 220kHz, but this frequency can be changed by changing C3.
We found this circuit in an old American documentation. The circuit can be applied to modern...
This full-wave circuit was obtained in Motorola's 1974 unijunction transistors manual. The circuit...
This circuit, very critical due to the frequency at which it operates, was found in an American...