Circuit arrangement for converting voltage levels in main power supply of motor vehicle, has load resistor controlled such that load resistor alternatively taps one voltage level to capacitor or another capacitor of potentiometer

摘要

The arrangement has a voltage converter i.e. capacitor transducer (6), adjusting voltage between two levels. The voltage converter represents a coupling element between the voltage levels and transmits energy from one of the voltage levels to the other voltage level. A load resistor (5) of the arrangement is controlled such that the load resistor alternatively taps the latter voltage level to a capacitor or another capacitor of a potentiometer. The potentiometer is formed as a capacitive potentiometer. The load resistor is controlled by switching devices e.g. change over switches. An independent claim is also included for a main power supply of a motor vehicle.