| 摘要 |
<p>PURPOSE:To prevent a fact that a signal cable stands in the way for an operation due to a wire type, and an inputtable range is saved in order to align optical axes of an infrared light emitting element and a light receiving element by modulating a carrier wave of plural frequencies by pulse signals in the X axis direction and the Y axis direction and bringing the modulated carrier wave to atmospheric propagation. CONSTITUTION:The subject system is provided with a transmitting part for modulating a carrier wave of plural frequencies by pulse signals in the X axis direction and the Y axis direction and bringing the modulated carrier wave to atmospheric propagation. For instance, when the carrier wave is generated by a sine wave oscillating circuit 21, and applied to an input side of an analog gate 22, the carrier wave is modulated by the analog gate 22, an output of the analog gate 22 is applied to a metallic piece 20 being an antenna 25 through a buffer 24, and the modulated carrier wave is transmitted from the metallic piece 20. In such a way, the operability of a mouse is improved, and the corresponding position relation of the mouse and a receiving conductor is not strict, and the mouse can be detected when the mouse is placed in the vicinity of the conductor.</p> |
