This circuit was suggested by Motorola in a 1980s publication. It is based on a PUT that is not a common component today. The division depends on the capacitor values according to the table.
The Buck-type DC-DC converter (voltage lowerer) shown in figure 11 is suggested by Analog Devices...
This circuit, which appears in other versions on this website, was obtained in old documentation. The load...
This circuit is from an Electronic Design from the 90's. The main integrated circuit is uncommon...