| 摘要 |
<p>PURPOSE:To execute sampling at a high speed, and also to make a device follow a high speed operation of a co-ordinate indicator, by deriving a speed and acceleration of the indicator, from a variation of an indicating position of the indicator, and deciding a scanning position of the next time. CONSTITUTION:A signal on a sensor line selected by an X axis or Y axis sensor line selecting circuit 2 or 4, by a scanning signal from a controlling circuit 9 is inputted to a co-ordinate value operating circuit 8 through an amplifying circuit 6 and a quantizing circuit 7. When scanning of the scanning area had ended, by this circuit 8, an X or Y co-ordinate of an indicating position of a co- ordinate indicator 5 is operated, and is transmitted to a controller 9. By a scanning center point operating circuit 9d of this controlling circuit 9, a speed and acceleration of the indicator 5 are derived from a vatiation of the indicating position of the indicator 5, inputted to each register 9a-9c, 9f-9h, and a scanning position of the next time is decided, and is provided to each X axis and Y axis scanning controlling circuit 9e, 9i. In this way, sampling is executed at a high speed, and also a device is made to follow a high speed operation of the indicator 5.</p> |
