| 摘要 |
A position pointing device performs coding of information corresponding to an operation expressed by continuous amount without using A/D converting circuit and transmits the coded information to a position detecting device. The information corresponding to operation expressed by a continuous amount is converted by a converting circuit (4) into time length. A counter (5) counts the number of waves of alternating electric, magnetic or electromagnetic field received by a receiving circuit (1) within the time length determined by the converting circuit (4), and performs binary coding of the counted value. A control circuit (3) controls a responding circuit (2) in accordance with the binary code so as to effect a change in alternating electric, magnetic or electromagnetic field which is sent back to the position detecting device. The information corresponding to operation expressed by continuous amount can be coded without requiring A/D converter which consumes large electric power. <IMAGE> |
