Patent ID: 9644995
Date: 2017-05-09
CPC Classifications: G01D,G03F

Claim:
1. A measurement system for measuring an input electrical current from a current source and generating a current measurement signal, comprising a current measuring circuit having a first input terminal connected to the current source for receiving the input electrical current from the current source and an output terminal for providing the current measurement signal, wherein the current measuring circuit further comprises one or more power supply terminals arranged to receive one or more voltages from a power supply for powering the current measuring circuit, and wherein the current measuring circuit further comprises a first voltage source coupled to the one or more power supply terminals, the first voltage source providing a disturbance voltage to the one or more power supply terminals, the disturbance voltage representing a voltage at the first input terminal, wherein the first input terminal, the output terminal and the one or more power supply terminals are distinct, wherein the current source, the power supply and the first voltage source are distinct, and wherein the measurement circuit is configured to drive the one or more power supply voltages with a voltage essentially the same as a voltage present at the first input terminal by feeding the disturbance voltage to the one or more power supply terminals.