Half normal frequency regime phase encoding in cordless digitize

Details Half normal frequency regime phase encoding in cordless digitize Half normal frequency regime phase encoding in cordless digitize

1993-10-25

1994-12-13

Chin, Stephen

Telegraphy

Systems

Position coordinate determination for writing

178 18, G08C 2100

Patent

active

053731182

ABSTRACT:
A device for imparting a signal phase status of an alternating current (AC) magnetic field signal transmitting from a cursor in a cordless digitizer. The device includes an apparatus for causing the cursor to temporarily emit a signal having a frequency which is lower than the frequency of a basic cursor signal, and an apparatus for determining and imparting the signal phase status of the AC magnetic field signal transmitting from the cursor as derived from the temporarily emitted lower frequency signal.

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