Circuit Arrangement for Generating a Supply Voltage with Controllable Ground Potential Level

A circuit arrangement for generating a supply voltage with a controllable ground potential level, the circuit arrangement comprising:

• a voltage source which provides the supply voltage ungrounded as a difference between two supply voltage potentials;
• a control unit which generates an adjustable control d.c. voltage to ground;
• and
• an operational amplifier having voltage supply terminals connected to the supply voltage potentials of the voltage source, the control d.c. voltage being applied to an inverting input of the operational amplifier, a non-inverting input of the operational amplifier being connected via a resistor network to the supply voltage potentials of the voltage source and to a ground terminal and an output of the operational amplifier being fed back to the inverting input via a capacitor.