Radial sweep generator circuit

Details Radial sweep generator circuit Radial sweep generator circuit

1978-08-14

1980-08-26

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

340752, H01J 2978

Patent

active

042197635

ABSTRACT:
A radial sweep generator circuit generates a series of radial sweep lines in succession to simulate a rotating sweep line which extends from the center of a video display to the periphery of the display. The display consists of a rectangular matrix of display positions arranged in lines and columns which are scanned in a raster scanning format. A vector number generator generates a vector number signal corresponding to one of the radial sweep lines which is to be displayed. A vector origin counter determines the display position on the periphery of the matrix from which the sweep line is to originate. A vector line generator is responsive to the vector number generator and to the vector origin counter for providing video display pulses.

REFERENCES:
patent: 3978480 (1976-08-01), Tsuruta et al.
patent: 4041692 (1977-08-01), Marshino
patent: 4138626 (1979-02-01), Unotoro et al.

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