05565658 is referenced by 357 patents and cites 6 patents.

Apparatus and method for a capacitance-based proximity sensor with interference rejection. A pair of electrode arrays establish a capacitance on a touch detection pad, the capacitance varying with movement of a conductive object near the pad. The capacitance variations are measured synchronously with a reference frequency signal to thus provide a measure of the position of the object. Electrical interference is rejected by producing a reference frequency signal which is not coherent with the interference.

Title
Capacitance-based proximity with interference rejection apparatus and methods
Application Number
914043
Publication Number
5565658
Application Date
December 7, 1994
Publication Date
October 15, 1996
Inventor
Michael D Layton
Salt Lake City
UT, US
George E Gerpheide
Salt Lake City
UT, US
Agent
Thorpe North & Western
Assignee
Cirque Corporation
UT, US
IPC
G08C 21/00
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