| 摘要 |
PURPOSE: To reduce power consumption by blocking the feedback of a pin cushion distortion signal with simple configuration. CONSTITUTION: A correction circuit 22 correcting pin cushion distortion is connected to a path of a vertical deflection current flowing through a vertical deflection coil 20, and the pin cushion distortion correction signal superimposed on a vertical sawtooth wave signal is fed back to a vertical output circuit 16 as a feedback correction signal. The vertical deflection current is fed to a band pass filter 30, in which an inverted phase component of the pin cushion distortion correction signal included in the vertical deflection current is extracted and the extracted pin cushion distortion correction signal of the inverted phase is added to a feedback correction signal to feed back only the vertical sawtooth wave signal to the vertical output circuit. The power supply voltage is decreased thereby. A band pass filter has a large attenuation around the vertical frequency and the frequency characteristic in the horizontal frequency band is 6dB/OCT. Then the inverted phase component is obtained. |
