Patent ID: 7242177
Filing Date: 2007-07-10
Classification: G01R

Abstract:
1. A method for current measurement through a conductor at a potential which is at a higher value than zero potential, comprising: measuring the voltage drop across a shunt resistance to determine the current value in the form of an analog signal, the shunt resistance being formed by a section of the conductor in which the electrical resistance is increased locally by reducing the cross-section of the conductor; converting the analog signal to a digital signal using an analog/digital converter; supplying a reference voltage to the analog/digital converter to compensate for a temperature dependence of the shunt resistance, a temperature course of the reference voltage at least approximately corresponding to a temperature course of the shunt resistance; and transmitting the digital signal to an evaluation unit which is at ground potential; wherein the analog signal is subjected to compression based on a non-linear characteristic of the analog/digital converter, and the digital signal is subjected to expansion after transmission at ground potential.