Patent ID: 8344740

Claim:
A system for measuring impedance of an electronic component comprising: a temperature compensated current source (I) connected in parallel to the electronic component (C) between a supply plane (V C ) and ground (V GND ) for providing a predetermined substantially constant current to the electronic component (C); and, a temperature compensated voltage level-shift connected between the supply plane (V C ) and the ground (V GND ) in parallel to the electronic component for sensing a voltage across the electronic component (C) and for providing a level-shifted output voltage V out in dependence thereupon; wherein the temperature compensated voltage level-shift comprises at least a resistor (R 1 ) connected in series with a current source (I 1 ) and an output port interposed between the at least a resistor (R 1 ) and the current source (I 1 ); and wherein the at least a resistor (R 1 ) comprises two resistors having opposite temperature coefficients.