Synchronisation device for digital frame transmission

Details Synchronisation device for digital frame transmission Synchronisation device for digital frame transmission

H - Electricity

04

J

340/205

H04J 3/06 (2006.01)

Patent

CA 1231413

A SYNCHRONIZATION DEVICE FOR DIGITAL FRAME TRANSMISSION ABSTRACT OF THE DISCLOSURE A synchronization device for digital data frame transmission system comprising an n bit series register transferring its contents at the line frequency to a parallel register also of n bits. The m first bits of the series register are also directed to a logic circuit detecting their conformity with the beginning of the synchronization word. When there is conformity, the logic circuit controls a divider dividing by n which controls, in its turn, at the line frequency divided by n, the transfer 15 of the contents of the parallel register to a PROM memory. The purpose of the PROM is to recognize the whole of the synchroniz- ation word. When there is no recognition, the operation of the divide by n divider is inhibited and the procedure begins again.

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