Sensor for measurement for wet and dry fingers

Details Sensor for measurement for wet and dry fingers Sensor for measurement for wet and dry fingers

2002-12-06

2009-10-20

Patel, Kanji (Department: 2624)

Image analysis

Applications

Personnel identification

C382S312000

Reexamination Certificate

active

07606398

ABSTRACT:
A sensor device for performing measurements on an at least partially conductive surface includes a number of conductive structures at or directly below the sensor surface. The conductive structures consist of at least one stimulation or current sink electrode and a number of sensor elements coupled to interrogation electrodes in an electronic circuit for measuring impedance between the electrodes and the stimulation electrode. The sensor device also includes at least one additional clamping electrode positioned in the vicinity of the sensor elements and coupled to a chosen voltage.

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Diep, T., et al. “Electrostatic Discharge (ESD) Standard Linear & Logic”,Texas Instruments, (Jan. 2001) SSYA010, 8 pages.

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