| 摘要 |
<p>APPLICATION OF FREDERICK S. HUTCH SIGNAL CORRELATOR A signal correlator for correlating pulse pairs received over a data transmission line as alternating positive and negative pulses representing data "l's" and "O's". The reception of a logic "1" is affirmed by testing for a negative polarity pulse following an initial positive polarity pulse received over the transmission line. Conversely, the reception of a logic "O" is affirmed by testing for a positive pulse following an initial negative pulse received over the transmission line. The first pulse of a pulse pair received over the transmission line is temporarily stored in a flip-flop and the stored pulse value is compared by a comparator with the second pulse when it arrives. An error signal is developed by the comparator in the event that an error is detected between the stored pulse value and the second pulse with which it is compared in either pulse pair combination.</p> |
