Patent ID: 7564250
Filing Date: 2009-07-21
Classification: G01R

Abstract:
1. A system for measuring resistance of a polarizing material, the system comprising: a voltage divider circuit having a first resistive element of known resistance and the polarizing material of unknown resistance that are electrically-coupled in series to ground; a processing unit electrically-coupled to the voltage divider circuit and adapted to apply a voltage across said voltage divider circuit; a first input/output (I/O) pin electrically-coupled between the processing unit and the first resistive element and having a state; a second pin electrically-coupled between the processing unit and a junction between the polarizing material and the first resistive element and having a state; and a controller that is structured and arranged to control the state of the first I/O pin to apply a voltage across the voltage divider circuit while simultaneously controlling the state of the second pin to enable a measurement of a voltage at the junction, and to control the state of the first I/O pin and the second pin to apply ground to each, whereby the polarizing material is shorted through the second pin.