| 摘要 |
PURPOSE:To perform registration adjustment easily and secured by superposing a saw-tooth correcting current, which synchronizes with horizontal deflecting operation, upon a vertical deflecting current, and varying the gradient of horizontal scanning lines. CONSTITUTION:When a vertical deflecting saw-tooth wave signal (a) is supplied to an input terminal 1, a vertical deflecting current (i) flows through a vertical deflecting coil 4 to make an electron beam scanning on an image pickup tube. Then, the voltage developed at a resistance 5 by the current (i) is fed back to the inverted input terminal of a vertical deflecting and outputting circuit 3, so constant-current driving is performed to improve the linearity of the operation. For this purpose, when a correction signal (b) is supplied from an input terminal 2, the current (i) is superposed upon the correction current by the correction signal (b), and consequently the vertical deflecting current (i) changes into a saw- tooth wave in every horizontal scanning period, so that horizontal scanning lines are inclind to left and right accordingly. |
