Patent ID: 6998798

Claim:
A device for performing S linearity correction, comprising: a ramp generation and amplitude control circuit that is arranged to receive a plurality of digital signals, and to provide a sawtooth-shaped sweep voltage and an amplitude correction signal in response to the plurality of digital signals; a ramp conditioning circuit that is arranged to provide an amplitude modulated sweep voltage and an unmodulated sweep voltage in response to the sawtooth-shaped sweep voltage and the amplitude correction signal; a waveform generation circuit that is arranged to provide a third order voltage based, in part, on the unmodulated sweep voltage; and a correction circuit that is arranged to provide a corrected output voltage based, in part, on the amplitude modulated sweep voltage and the third order voltage, such that a line spacing between horizontal lines toward a top and a bottom of a screen is substantially equal to another line spacing in a middle of the screen, and such that a size of a displayed picture is substantially maintained before and after an application of S linearity correction.