This circuit is from a National Semiconductor manual from the 1980s. The integrated circuit is rare today and next to the diagram we have the formula for calculating the components.
This circuit was found in ancient American documentation. Diodes are general-purpose types. |...
This 80's General Electric circuit is guarded by the noise-guard for operating current. The...
This circuit was found in the January 1975 Radio Electronics magazine. The diodes are current...