| 摘要 |
PURPOSE:To constitute a pincushion-distortion correction circuit which can be actuated easily and generate an invariably-constant high-tension output, by absorbing phase variation. CONSTITUTION:Switching element Q1 is connected in series to 1st and 2nd coils L1 and L2, and flyback transformer 6 is to coil L1. To middle connection point (l) between coils L1 and L2, switching element Q2 is connected, and charging capacitor C0 is connected into the common current path for both switching elements Q1 and Q2. The horizontal oscillation output from horizontal oscillator 1 is applied to switching element Q1 in this constitution via driver circuit 13 to attain the control, the output of phase modulator 2 receiving the horizontal oscillation output of oscillator 1 and the output pulse of transformer 6 is applied to switching element Q2 via driver circuit 14, and a signal modulated by a parabolic waveform correcting signal of a vertical period is applied, thereby controlling the circuit. |
