Vibheesh Bharathan

US Patent:

8547118, Oct 1, 2013

Filed:

Dec 21, 2012

Appl. No.:

13/724516

Inventors:

Santhosh Kumar Vojjala - Bangalore,
Vibheesh Bharathan - San Jose CA,
Sai Prashanth Chinnapalli - San Jose CA,
Jijeesh Choorakottayil Gopinathan - Ernakulam,
Edward Grivna - Brooklyn Park MN,
David G. Wright - San Diego CA,

Assignee:

Cypress Semiconductor Corporation - San Jose CA

International Classification:

G01R 27/26

US Classification:

324681, 324667, 324686

Abstract:

An apparatus includes multiple capacitive sensing elements coupled through a filter network. The apparatus can include a control device configured to excite the capacitive sensing elements with different scanning frequencies and determine capacitances corresponding to each of the capacitive sensing elements based on sensor responses to the excitation of the capacitive sensing elements with the different scanning frequencies and a configuration of the filter network.