公开(公告)号：AU6928274A

公开(公告)日：1975-11-27

申请号：AU6928274

申请日：1974-05-23

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE JOSEPH ,  GIACOMINO GERALD LEE ,  BRAUN WILLIAM VICTOR ,  PARTIPILO PHILIP ,  BRU WILLIAM VICTOR

IPC: H04B1/06 ,  G06F17/15 ,  H04L13/18 ,  H04L17/16 ,  H04W88/02 ,  G09C1/00 ,  H03K5/18

Abstract: A detector for detecting predetermined digital words within a train of signals wherein the digits in the words each have a predetermined time period. The detector continuously samples the train of signals coupled thereto. Samplings are taken a number of times during the interval of a digit time period, and a digital signal corresponding to the sampled signal for each sample taken is stored in a multi-stage storage register. Comparison circuitry compares the digital signals in the storage register with a first predetermined word in a memory circuit. If there is a correlation, the comparison circuit counts for a time period long enough to sample the train of signals and store a new series of signals corresponding to a second digital word. The comparison circuit compares these second digital signals with a second word in the memory circuit. A correlation between theset two words produces a detection signal.