| 摘要 |
<p>PURPOSE:To save trouble for the adjustment and to automatically correct an output characteristic caused by a difference of a resistance value of a resistor by inputting an output of an A/D converter as a reference value in a state that a switch is connected, and correcting the output of the A/D converter by this reference value at the time of inputting a coordinate. CONSTITUTION:End parts of an X side resistor 20 and a Y side resistor 10 are connected by a switch S1, the same state as a state that a pen is brought into contact with the maximum position of X and Y of an input plate 4 is made out, and an output of an A/D converter 7 in its state is inputted as the maximum reference value by a control part 9. In such a state, at the time of inputting a coordinate, an output of a full range is obtained by correcting the output of the A/D converter 7, based on the reference value as a reference. In such a way, trouble for the adjustment executed by a variable resistor is saved, and an output characteristic caused by a difference of the resistance value of the resistor can be corrected automatically.</p> |
