Differential level shifter with automatic error compensation

A method for measuring a voltage difference between two measurement potentials, comprising:

• shifting the measurement potentials by a voltage potential defined by a first pair of impression currents to obtain a first pair of shifted measurement potentials;
• shifting the measurement potentials by a voltage potential defined by a second pair of impression currents different to the first pair to obtain a second pair of shifted measurement potentials;
• and
• determining the voltage difference to be measured based on a first voltage difference between the first pair of shifted measurement potentials and based on a second voltage difference between the second pair of shifted measurement potentials.

A computer program product comprising a computer readable medium storing program code, which when executed on a computer performs a method for measuring a voltage difference between two measurement potentials, comprising:

• shifting the measurement potentials by a voltage potential defined by a first pair of impression currents to obtain a first pair of shifted measurement potentials;
• shifting the measurement potentials by a voltage potential defined by a second pair of impression currents different to the first pair to obtain a second pair of shifted measurement potentials;
• and
• determining the voltage difference to be measured based on a first voltage difference between the first pair of shifted measurement potentials and based on a second voltage difference between the second pair of shifted measurement potentials.

An apparatus for measuring a voltage difference between two measurement potentials, comprising:

• a voltage converter shifting the measurement potentials by a voltage potential and generating first and second pairs of shifted measurement potentials,
• a controller controlling the voltage converter such that the voltage converter determines the first pair of shifted measurement potentials in a first measurement phase, and determines the second pair of shifted measurement potentials in a second measurement phase;
• and
• an evaluator determining the voltage difference based on a first voltage difference between the first pair of shifted measurement potentials and on a second voltage difference between the second pair of shifted measurement potentials.