| 摘要 |
PURPOSE:To minimize the increase in ringing and noise and to compensate the profile of a picture, by avoiding the supply of signal for smaller amplitude variance to an auxiliary deflection coil, through the combination of nonlinear circuits for luminance change detection circuit. CONSTITUTION:Luminance signal is input to a luminance change detection circuit 1 and output as the detection signal detecting the luminance change. This detection signal is input to a nonlinear processing circuit 7, the signal in small amplitude change part is cut off, and only the signal having large amplitude change is fed to an auxiliary deflection coil 2. That is, since noise is smaller in the change in comparison with the change of the signal content, it is cut off at a nonlinear processing circuit 7. |
