Piezo key sensing circuit and method for testing the piezo key sensing circuit

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United States of America Patent

PATENT NO 9804214
APP PUB NO 20150260770A1
SERIAL NO

14700359

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Abstract

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A method tests a piezo key sensing circuit having a piezo element and verifies that it is properly functioning. A capacitance of the piezo element is discharged. Then the capacitance of the piezo element is charged during a predetermined time period. An output signal of the piezo element is measured during the predetermined time period resulting in a measured output signal. An operating condition of the piezo key sensing circuit is determined based on the measured output signal.

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Patent Owner(s)

Patent OwnerAddress
DIEHL AKO STIFTUNG & CO KGPFANNERSTRASSE 75 WANGEN D-88239

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dmytriw, Tony Dekalb, US 2 8

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