Dual channel curve tracer

Details Dual channel curve tracer Dual channel curve tracer

1983-05-27

1985-10-08

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340721, 340722, G09G

Patent

active

045463484

ABSTRACT:
A system and method for displaying graphic information and comparing this information with reference data on the faceplate of a cathode ray tube (CRT) is disclosed. The graphic information is provided via a first channel and the reference data is provided via a second channel to a multiplexer for the alternating, sequential display of the graphic information and reference data on the CRT. A high frequency oscillator in combination with logic circuitry provides on/off modulation of one of these inputs to the CRT to produce an interrupted, discontinuous display of the thus modulated signal. One set of data is thus displayed as a continuous line, while the other set of data is presented in dotted line form. The present invention is particularly adapted for the presentation of two sets of closely matched data points on a CRT to facilitate the differentiation and identification of each data set.

REFERENCES:
patent: 2962625 (1960-11-01), Berwin et al.
patent: 3254301 (1966-05-01), McGrath et al.
patent: 3406387 (1968-10-01), Werme
patent: 3422418 (1969-01-01), Simoneau
patent: 3457507 (1969-07-01), Overtveld
patent: 3614614 (1971-10-01), Starliper
patent: 3781850 (1973-12-01), Gicca et al.
patent: 3818474 (1974-06-01), Kurner et al.
patent: 4307393 (1981-12-01), Hamada et al.

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