| 摘要 |
PURPOSE:To prevent wrong code detection during the input of a random pulse signal by suppressing and making a decoder output ineffective until the number of output pulses from a decoder which detects a code attains to a specific value. CONSTITUTION:A coded pulse time-series signal formed of pair pulses is detected by the 1st and the 2nd decoders 10 and 13 and codes are decoded and detected by the multivibrator 18, etc., of a code detection control circuit 19. The output of this decoder 13 is supplied to a counter 15 while supplied to the delay circuit 14 of the circuit 19, and a gate circuit 17 is held closed through a gate generating circuit 16 until the counted value of the counter 15 attains to the specific value; and outputs of the decoders 10 and 13 are suppressed and the code detection output is made ineffective, so that wrong code detection is prevented even when the random pulse signal is inputted. |
