Arbitrary raster blanking circuit

Details Arbitrary raster blanking circuit Arbitrary raster blanking circuit

1983-12-22

1987-05-05

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340709, 315365, 315377, G09G 114

Patent

active

046636188

ABSTRACT:
An apparatus is disclosed for displaying arbitrary forms on a raster-scanned cathode ray tube converting the analog X and Y deflection voltages of the raster signal directly into a digital TTL level blanking signal. The circuit designer, utilizing cartesian or polar coordinates, specifies a desired shape and its location utilizing the appropriate formulas. In this manner, a number of raster cut-out circuits are readily coupled to define a desired number of arbitrary shapes on a raster scanned cathode ray tube.

REFERENCES:
patent: 3835464 (1974-09-01), Rider
patent: 4348667 (1982-09-01), Williams et al.
patent: 4354185 (1982-10-01), Worborschil
patent: 4355805 (1982-10-01), Baer et al.
patent: 4454507 (1984-06-01), Srinivasan et al.

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