Telegraphy – Systems – Position coordinate determination for writing
Patent
1997-03-14
1999-11-30
Shankar, Vijay
Telegraphy
Systems
Position coordinate determination for writing
178 1802, 178 1803, 178 1804, 178 1901, 178 1903, G08C 2100
Patent
active
059946512
ABSTRACT:
The invention concerns a stylus for producing a high-voltage, sinusoidal signal for an electrostatic digitizing pad. The high voltage is obtained by applying a sine wave to one lead of the primary of a transformer, and applying the inverse of the sine wave to the other lead of the primary. The secondary of the transformer produces the high voltage, which is developed into a signal which is applied to the digitizing pad.
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Partow Tony S.
Stanchak Carl M.
Hyundai Electronics America
NCR Corporation
Shankar Vijay
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