Pointing device with reduced component count
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United States of America Patent
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-
Jan 16, 2001
Grant Date -
N/A
app pub date -
Sep 21, 1998
filing date -
Aug 30, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A signal processing system for a strain-gauge pointing device has a reduced parts count and permits the use of relatively inexpensive low-tolerance components. The system can process signals from two or three or more strain gauges, permitting additional inputs by users without a linear increase in the number of signal processing components. The system employs an RC network to develop an offset for the signal to be provided to an analog-to-digital converter. The system performs each measurement twice, once with a particular excitation polarity and again with the opposite excitation polarity, which permits correction for drift and temperature instability.
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