Video signal generating circuit

Details Video signal generating circuit Video signal generating circuit

1983-04-04

1987-02-10

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340748, 340750, G09G 106

Patent

active

046426221

ABSTRACT:
A video signal generating circuit comprises a buffer memory for storing character codes and control data for control of vertical character positions, a character pattern memory having a plurality of stored character patterns which are selected by the output of the buffer memory, and a control circuit for successively reading the character codes and control data from the buffer memory and the character patterns from the character pattern memory. The value of a logical operation of raster data generated by the control circuit and the control data is used as raster data or an effective raster scan signal for the character pattern memory.

REFERENCES:
patent: 3877007 (1975-04-01), Fishman
patent: 3918040 (1975-11-01), Beuter et al.
patent: 4246578 (1981-01-01), Kawasaki et al.
patent: 4323892 (1982-04-01), Kinghorn
patent: 4342990 (1982-08-01), Traster
G. I. Findley et al, "Control of the IBM 3800 Printing Subsystem", IBM J. Res. Develop., vol. 22, No. 1, Jan. 1978, pp. 108-116.

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