Digitizer pad

Details Digitizer pad Digitizer pad

1986-01-17

1988-04-19

Goldberg, E. A.

Electrical resistors

Mechanically variable

Surfaces pressed together

338114, 340365A, H01C 1010, H01C 1012

Patent

active

047392991

ABSTRACT:
A digitizer pad includes at least two sets of terminals where each set has at least a first and second terminal positioned to define a parameter dimension therebetween. A resistor ply is disposed between the terminals of each set. The resistor ply has an electrical contact surface with a resistance gradient profile between the terminals in each set. An output terminal is electrically interconnected to a selected location along the contact surface of the resistor ply. A voltage source is sequentially coupled, by suitable switching means, across a selected subset of terminals in each set of terminals whereby the voltage at the output terminal is a measure of the selected location along the parameter dimension defined by the terminals across which the voltage source is coupled.

REFERENCES:
patent: 4315238 (1982-02-01), Eventoff
patent: 4319078 (1982-03-01), Yokoo et al.
patent: 4441097 (1984-04-01), Anderson
patent: 4484026 (1984-11-01), Thornburg

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