This circuit was obtained in the 1990 Motorola Linear Databook. The circuit uses a 139 series comparator, but other series can be used. The power source need not be symmetric.
This circuit converts voltages from 5 to 12 V at voltages of 100 to 400 V. The transformer has a...
We found this CMOS circuit based on the PLL4046 in the December 1989 issue of Radio Electronics magazine....
We found this circuit in an old publication. The circuit can be implemented with modern equivalent...