Interface circuitry for interconnecting touch tablet with a computer interface
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United States of America Patent
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Apr 8, 1986
Grant Date -
N/A
app pub date -
Mar 30, 1984
filing date -
Mar 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Interface circuitry is provided for interconnecting a source of positional data such as a touch tablet with a computer interface. The circuitry acquires voltages from the source of positional data which represent the data. An acquired voltage is compared with a ramped voltage. At the time of crossover the internal capacitor of the computer interface is rapidly charged above the threshold level to provide positional data from the external source to the computer interface.
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