Patent ID: 7102302

Claim:
A waveform generator, comprising: a source of a periodic input correction signal; a capacitor; a first semiconductor switch coupled to said capacitor and responsive to a signal at a first reference level for developing a direct current voltage in said capacitor that level shifts said periodic, input correction signal by an amount determined in accordance with said first reference level; a source of a periodic switch control signal; and a second semiconductor switch responsive to said level shifted periodic input correction signal and to said periodic switch control signal for generating a periodic output dynamic correction signal having a frequency related to a deflection frequency and a waveform portion, controlled by an operation of said second semiconductor switch, said waveform portion occurring, during a corresponding portion of a period of said output dynamic correction signal, said dynamic correction signal being coupled to a cathode ray tube to vary a field in a beam path of an electron beam of said cathode ray tube for providing dynamic correction.