Repeater for regenerating frame-multiplexed signal

Abstract From the Canadian patent

A repeater which receives a frame-multiplexed signal, extracts a receiving clock from the signal and, detects a timing of frame synchronization. The receiving clock and a master clock are input into a selector the, output of the selector is supplied for frame regeneration through a clock phase gradual shift circuit and the detected timing is supplied for frame synchronization in the regenerated frame-multiplexed signal through a gate. Normally, the receiving clock and the detected timing is supplied for the frame regeneration, however, when the detection of the timing of frame synchronization fails, the output of the selector is switched to the master clock and the gate becomes off, and …