| 摘要 |
PURPOSE:To prevent malfunctions dependent upon shift of the fundamental frequency of the transmission side and the receiving side, by making it possible to correct the read pulse generation time by transmitting the same frame twice and adding a bit for read time correction to this frame, in the remote control device. CONSTITUTION:When the first bit of one frame of the frequency modulation wave dependent upon the fundamental frequency of the transmission side is received, counter correction pulse generating circuit 40 drives counter reset circuit 41 and resets counter 39. When counter 39 detects receiving of the bit for read time correction (the 5th bit) in one framebit divisional input signal detecting circuit 34 resets counter 39 partially by receiving of the second bit for read correction (the 6th bit) to synchronize read pulses applied to shift register 35 with the input signal again. By transmitting the same frame twice, agreement is checked in the receiving side. Consequently, read error of the receiving signal dependent upon shift of the fundamental frequency of transmission and receiving sides can be prevented. |
