Electrical resistors – Mechanically variable – Resistance element adjustably short-circuited
Patent
1991-12-11
1993-09-07
Lateef, Marvin M.
Electrical resistors
Mechanically variable
Resistance element adjustably short-circuited
338114, H01C 1006
Patent
active
052433170
ABSTRACT:
A digitizer whose sensing elements are made of magnetoresistive materials is designed for use with a computer system. The digitizer board includes a substrate made of dielectric material; a first array of strip-shaped magneto-resistors arranged on the front surface of the substrate; a second array of strip-shaped magneto-resistors arranged on the reverse surface of the substrate; a plurality of analog comparators coupled to the magneto-resistors; and a pen with a magnetic pinpoint used for pointing to a particular location on the front side of the digitizer board. The resistance of the magneto-resistors will vary due to a magnetic field emerging from the nearby pinpoint, and the magnetic-resistors will be effected, and subsequently the comparators connected to the magneto-resistors will send digital signals to the computer system.
REFERENCES:
patent: 4482784 (1984-11-01), Whetstone
patent: 4739299 (1988-04-01), Eventoff et al.
patent: 4810992 (1989-03-01), Eventoff
patent: 4833279 (1989-05-01), Chen et al.
Chen Hsing
Chou Ting
Jeang Pie-Yu
Wang Ping-Wei
Yeh Spring
Industrial Technology Research Institute
Lateef Marvin M.
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