Matrix screening and grounding arrangement and method

Details Matrix screening and grounding arrangement and method Matrix screening and grounding arrangement and method

G - Physics

06

F

340/178

G06F 3/023 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1187962

Abstract of the Disclosure A capacitance keyboard matrix screening and grounding arrangement and method are disclosure in which scanning drive means and scanning sense means sequentially address drive and sense conductors in drive and sense conductor arrays respectively and maintain a reference potential on all conductors except for individual conductors while they are being addressed. The scanning drive and sense means are implemented with demultiplexers whose output terminals are each connected to a drive or sense conductor through an inverter.

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