Telegraphy – Systems – Position coordinate determination for writing
Patent
1995-07-15
1998-02-03
Chin, Stephen
Telegraphy
Systems
Position coordinate determination for writing
G08C 2100
Patent
active
057147205
ABSTRACT:
A high efficiency passive pointer digitizer system comprising first and second sets of orthogonal and substantially coplanar conductors, a signal generator for generating a driving signal selectively along the first set of conductors, a movable pointer inductively coupled to the first and second sets of conductors, the pointer including a tuned circuit responsive to the driving signal for radiating a positional signal, a signal detector for detecting a positional signal induced in the second set of conductors by the tuned circuit responding to the driving signal, and a signal processor coupled to the signal generator and the signal detector for determining the location of the pointer relative to the conductors.
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CalComp Inc.
Chin Stephen
Kim Kevin
Porter, Jr. William F.
Smith Frederic P.
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