Sensor module for measuring surfaces

Details Sensor module for measuring surfaces Sensor module for measuring surfaces

2007-07-03

2007-07-03

Hirshfeld, Andrew H. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C382S124000, C345S173000, C324S691000

Reexamination Certificate

active

10506197

ABSTRACT:
This invention relates to a sensor module for measuring structures in a surface, especially in a finger surface being moved over the sensor module, that includes a number of sensor elements, and an outer electrode located aside the sensor elements, the sensor elements being coupled to at least one AC drive circuit providing a varying current or voltage, thus coupling a signal through the sensor elements to the outer electrode.The sensor elements are also coupled to an electronic circuit positioned on a substrate, the substrate includes conductor leads coupling the sensor elements to the electronic circuit, and the electronic circuit being adapted to measure the magnitude of the capacitance or AC impedance.

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patent: WO 01/99036 (2001-12-01), None
patent: WO 01/99036 (2001-12-01), None

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