Position sensor
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United States of America Patent
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Jul 29, 2008
Grant Date -
Aug 4, 2005
app pub date -
Nov 22, 2002
filing date -
Mar 5, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A low cost x-y digitising system is described for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitiser includes a resonant stylus, an excitation winding for energising the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. A novel stylus design is described together with novel digitiser windings and novel excitation and processing circuitry.
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