| 摘要 |
PURPOSE:To eliminate the need for an AGC circuit or the like and to attain normal data communication by devising the transmitter-receiver such that a receiver side amplifier is not saturated in the data transmitter-receiver employing an infrared ray when a signal amplification factor of the receiver side amplifier is increased and a transmitter-receiver section of one equipment is made opposite to a transmitter-receiver section of other equipment at a closest internal. CONSTITUTION:An infrared ray light emitting element 33a (33b) and an infrared ray light receiving element 34a (34b) are provided to one side of an electronic notebook case 31a (31b) for data transmission reception using an infrared ray signal, the center position of the light emitting element 33a (33b) and the light receiving element 34a (34b) is offset to the right with respect to the center position of one side face of the case 31a (31b), and the directional direction deviation angle between the light emitting element 33a (33b) and the light receiving element 34b (34a) opposite to each other is increased as the distance between the transmitter-receiver section 32a of the one case 31a and the transmitter- receiver section 32b of the other case 31b is close to each other. |
