Touch sensing circuit and method
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United States of America Patent
Stats
-
Feb 16, 2016
Grant Date -
May 22, 2014
app pub date -
Mar 15, 2013
filing date -
Nov 16, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A touch sensing circuit is provided. The touch sensing circuit includes: a touch capacitor, for being touched; a touch capacitor frequency detection unit, coupled to the touch capacitor, for detecting an output frequency from the touch capacitor; a reference frequency generation unit, for generating a reference frequency; a calculation unit, coupled to the touch capacitor frequency detection unit and the reference frequency generation unit, for calculating the variation of the difference between the output frequency from the touch capacitor and the reference frequency; and a determination unit, coupled to the calculation unit, for determining whether the touch capacitor is being touched based on whether the variation of the difference is greater than a criterion value.
First Claim
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Family
International Classification(s)
- 2013 Application Filing Year
- H03K Class
- 2259 Applications Filed
- 1924 Patents Issued To-Date
- 85.18 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H03K Class
- 0 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 16, 2027 |
