Circuit knowledge

This is a simple Electronic Polarity Converter Circuit Diagram. The capacitor-diode output schema is used here as a polarity converter to generate a - 5 volt supply from +15 volts. This schema is useful for an output current of up to 20 mA with no additional boost transistors required. Since the output transistors are current limited, no additional protection is necessary Also, the lack of an inductor allows the schema to be stabilized with only the output capacitor.