Analog to digital converter keypad method and apparatus

Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad

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341 26, 34082579, H03K 1794

Patent

active

059297905

ABSTRACT:
An ADC (analog digital converter) keypad apparatus controls key inputs according to a voltage divided by a plurality of voltage dividing resistors. The ADC keypad apparatus includes an ADC keypad, an A/D converter for converting a divided voltage which is determined according to a key input, a memory for storing key discriminating data, a display for displaying status information, and a controller for re-establishing the key discriminating data. Upon receiving a key re-establishing signal from the A/D converter due to a change of the divided voltage, the controller provides the display with a display signal for displaying the status information and re-establishes the key discriminating data.

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