| 摘要 |
<p>PURPOSE:To prevent erroneous detection of start pulse and occurrence of malfunction in digital data transmission by adding a mojority logic circuit and a sheathe/release pulse detecting circuit. CONSTITUTION:A majority logic circuit 4 and a sheath/release pulse detecting circuit 5 are provided newly. An input signal (a) is judged accurately by the majority logic circuit 4 and start pulse is detected by the sheathe/release pulse detecting circuit 5. Accordingly, judging of start pulse STP which is always added after sheath pulse SP on the transmission format becomes easy and accurate. Consequently, even when spikelike pulse due to noise is added to an input signal, erroneous detection of start pulse and occurrence of malfunction do not occur.</p> |
