| 摘要 |
PURPOSE:To attain small size and low cost by providing a signal control means controlling a transmission means or a timing signal generating means so as to switch the phase of either a remote control signal light or a timing signal for each prescribed time. CONSTITUTION:A remote control signal light is outputted as a signal light from an iRED of a transmitter and received by a photodiode 1. Then a signal current nearly proportional to the reception signal is converted into a voltage by an amplifier 2, the AC component is cut off by a capacitor 4 and amplified by an amplifier 7 and becomes a signal AC-OUT. With a signal SPL1 at 'H', an analog switch 13 is turned on and the signal AC-OUT is integrated by a Miller integration circuit comprising a resistor 11, a capacitor 6 and an amplifier 17 and, with a signal SPL2 at 'H', an analog switch 14 is turned on and an inverse of signal AC-OUT (iNV-OUT) is integrated by a Miller integration circuit comprising a resistor 12, a capacitor 16 and an amplifier 17. Finally, the integration is applied in opposite direction between the 'H' level of the signal SPL1 and of the signal SPL2. |
