Digitizer device with anti-noise and status display

Details Digitizer device with anti-noise and status display Digitizer device with anti-noise and status display

1992-11-12

1994-11-15

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

178 18, G09G 302

Patent

active

053652533

ABSTRACT:
A digitizer device with anti-noise and status display having a hardware circuit controlled by a software program to eliminate outside noises. The system includes a cursor control mouse or stylus which emits an oscillating signal at several hundred KHz to induce a X-Y grid, an anti-noise circuit which eliminates outside noises from the induced signal, an ADC converter which converts the induced signal into a digital signal, a microcontroller unit which calculates the induced signal into corresponding X-Y axis coordinate value, and a display which shows the current status of the digitizer.

REFERENCES:
patent: 4534060 (1985-08-01), Ward
patent: 4742473 (1988-05-01), Shurar et al.
patent: 4859814 (1989-08-01), Sciacero et al.
patent: 4910363 (1990-03-01), Kobayashi et al.
patent: 5083118 (1992-01-01), Kazama
patent: 5191175 (1993-03-01), Protheroe et al.
patent: 5218174 (1993-06-01), Gray et al.

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