Balanced resistance capacitive sensing apparatus

Details Balanced resistance capacitive sensing apparatus Balanced resistance capacitive sensing apparatus

2008-06-24

2010-06-15

Noori, Max (Department: 2855)

Measuring and testing

Dynamometers

Responsive to force

C073S780000

Reexamination Certificate

active

07735383

ABSTRACT:
Embodiments for a capacitive sensing apparatus with attenuated electrical interference across a plurality of routing traces are provided. One embodiment forms a first sensor electrode on a substrate. In addition, a first routing trace is formed on the substrate, the first routing trace coupled with the first sensor electrode. One embodiment additionally forms a second sensor electrode on the substrate. A second routing trace differing in length from the first routing trace is also formed on the substrate, the second routing trace coupled with the second sensor electrode. To attenuate electrical interference, the second routing trace is formed having an approximately equal RC time constant characteristic as the first routing trace.

REFERENCES:
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patent: 6844714 (2005-01-01), Balmain et al.
patent: 7295724 (2007-11-01), Wang et al.
patent: 2003/0056589 (2003-03-01), Geen et al.
patent: 2008/0252608 (2008-10-01), Geaghan

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