Transducer for providing distance information about a target relative to a transducer
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United States of America Patent
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Sep 28, 1999
Grant Date -
N/A
app pub date -
May 30, 1997
filing date -
Nov 7, 1994
priority date (Note) -
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Abstract
A transducer is disclosed which provides distance or position information about a target relative to the transducer. The transducer has first resistor and a first electrode for forming a first capacitive coupling with a target, a second resistor and a second electrode for forming a second capacitive coupling with the target. Signals of opposite phase or polarity are applied to the respective resistor electrode combinations. By applying signals of opposite phase or polarity, no net signal is applied to the target, thereby avoiding problems with cross talk between adjacent transducers.
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