Multistandard geometry correction device for flat shadow mask high definition displays

A circuit which integrates a set of basic geometry correction waveforms together suitable for flat shadow mask displays has been implemented. A sinewave generation technique which does not use frequency selective components is used. Horizontal and vertical frequencies may be independently changed by modifying two external circuits. Since all output waveforms track these frequency changes while retaining their shapes and amplitudes, this implementation is suitable for multimode operation. The proposed technique does not have the drawbacks of current methods of sinewave generation, which involve frequency selective components and do not lend themselves to multifrequency operation