Error checking for binary data transmission - operates by repeating each group of bits and comparing these groups at receiver (NL 4.10.77)

摘要

A transmitting unit (10) which can be a single integrated circuit. It comprises a cyclic counter (1), store (3) gating unit (4) and timing flip flop (7). The contents of the counter (1) are fed to the store (3) both directly and via the store (3) under the control of the timing flip flop (7). The duplicated data coming from the gating unit (4) is fed to a parallel serial converter (5) and transmitted down a transmission line (6). At the receiver, a serial to parallel converter (17) accepts the data on the line (6) and feeds it in parallel form to a comparator (13) both directly and via a storage unit (12) under the control of an addressing clock (15). If the data repetition is correctly detected by the comparator, a clocking unit (14) gates it into a buffer store (16).