Concept for interfacing a first circuit requiring a first supply voltage and a second supply circuit requiring a second supply voltage

A system comprising:

• a first circuit having a first voltage supply for supplying a first supply voltage;
• a second circuit having a second voltage supply for supplying a second supply voltage being different from the first supply voltage;
• and
• an interface interfacing the first circuit and the second circuit, the interface comprising:
• a driver circuit having a driver network comprising resistive elements and driver supply voltage terminals connected to controllable switches;
• a receiver circuit having a receiving network comprising a resistive element and receiver supply voltage terminals;
• a connection line connecting the driver circuit and the receiver circuit, wherein the controllable switches have two switch configurations, a first switch configuration resulting in a high voltage on the connection line and a second switch configuration resulting in a low voltage on the connection line, wherein the resistive elements in the driver network and the receiver network are designed to have values so that a sum of the high voltage and the low voltage is equal to the second supply voltage within a range of 10% of the second supply voltage when the first supply voltage is applied to the driver supply voltage terminals and when the second supply voltage is applied to the receiver supply voltage terminals.