| 摘要 |
PURPOSE:To always obtain a satisfactory communication state without increasing the power consumption, in the data receiving equipment using infrared ray, utilized for a data communication, etc., by a wireless remote controller mounted on various electronic equipments and each information equipment. CONSTITUTION:This equipment is constituted so that an infrared ray optical signal S radiated from a semiconductor light emitting element 34 is photodetected and received by a semiconductor light receiving element 36, whether its received data is normal or not is decided by a CPU 40, and in the case it is decided that the received data is abnormal, latch data to a latch circuit 41 is changed and set successively, and by varying the attenuation amount in an attenuator 43, a reversely applied voltage to the semiconductor light receiving element 36 from a switching regulator 42 is boosted gradually and its photodetecting sensitivity is allowed to ascend, and when it is decided that the received data is normal by the CPU 40, a data communication is executed by maintaining the reversely applied voltage and the receiving sensitivity in that case. |
