| 摘要 |
A simple and cheap dynamic S-correction circuit compensates the higher order errors like the so-called moustache effect and the inner linearity distortion. This is achieved in a known way by connecting an additional proper tuned S-capacitor in parallel with the original one during the start and end of the scan interval. Duty cycle modulation of the on/off times as a function of the frame compensates the inner-pin distortion (also called inner-linearity or modulated S-correction). The duty cycle or the switch on and off instants required to compensate the horizontal distortion or moustache effect is derived by comparing the AC parabolic waveform generated on the S-capacitors with a DC-voltage. Duty-cycle modulation required for compensation of the inner-pin distortion is, in this way, automatically obtained. |
