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Raster scan color display system and method having improved pin cushion non-linearity correction

Image Number 5 for United States Patent #4335333.

A raster scan color display system for a CRT includes a vertical sweep system wherein a parabolic signal repeating at the horizontal sweep rate is multiplied with a vertical sweep signal corresponding to a linear ramp repeating at a vertical deflection rate. The output is differentiated and capacitively coupled to a wideband voltage drive vertical deflection amplifier to provide pin-cushion non-linearity correction.

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