Touch sensitive screen signal detection arrangement

Details Touch sensitive screen signal detection arrangement Touch sensitive screen signal detection arrangement

1980-04-16

1981-12-08

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

364571, 364582, 340365P, 307358, 250549, G06F 3153, G08C 2100

Patent

active

043050719

ABSTRACT:
In certain situations it is necessary to detect a slight change in a continuous wave signal and to be able to specifically determine the exact position of the change. This is especially necessary in situations where a continuously changing signal (with respect to time) is generated and where it is necessary to determine, at a particular instant of time, any change in the signal from a previous corresponding instant of time. Where the signal is periodic in nature and substantially repeatable between cycles it is possible to establish a memory data base of signal levels as a function of time. Comparisons can then be made on successive cycle against the known, or precalculated data base. Changes between the data base and the new signal result give a positive signal change indication.

REFERENCES:
patent: 3348234 (1967-10-01), Foster
patent: 3707715 (1972-12-01), Perotto
patent: 3930248 (1975-12-01), Keller

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