| 摘要 |
PURPOSE:To prevent the luminance change and the color deviation by converting deflection data in a deflection memory to an analog current by a D/A converter and converting it to an analog voltage by an operational amplifier and inputting it to a differential amplifier to amplify the voltage and giving a deflecting signal to a horizontal deflecting electrode. CONSTITUTION:Deflection data sent from the deflection memory is converted to an analog current by a D/A converter 50 and is converted to an analog voltage by an operational amplifier 52 and its feedback resistor 52. The analog voltage is inputted to a transistor TR 54 and is shifted by a cascade TR 56 and a resistor 58. Thereafter, the current is amplified by a TR 64 to give horizontal deflecting signals h and h' to horizontal deflecting electrodes 18 and 18' by output buffer TRs 69 and 70. Thus, the variance in center voltage and amplitude voltage of the horizontal deflecting signal due to the voltage variance of horizontal deflecting high power and horizontal deflecting power or the temperature change is difficult, and a picture display device free from luminance change and color deviation is realized. |
