Radial sweep generator circuit
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United States of America Patent
Stats
-
Aug 26, 1980
Grant Date -
N/A
app pub date -
Aug 14, 1978
filing date -
Aug 14, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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