Synchronizing circuit for use with a telecommunication system

Details Synchronizing circuit for use with a telecommunication system Synchronizing circuit for use with a telecommunication system

1981-03-31

1983-01-25

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

370105, H04J 306, H04Q 1104

Patent

active

043706487

ABSTRACT:
A synchronizing circuit for use with a digital communication system is disclosed. A serial data stream is arranged in frames composed of at least two data words containing a synchronization signalling code and binary coded information, respectively. For detecting the alignment of consecutive frames the synchronizing circuit includes a serial/parallel converter and a synchronizing detector logic network for generating two control signals indicating the presence of the synchronization code in form of a normal synchronizing bit pattern or an inverted synchronizing bit pattern respectively. An AND-gate logically links the first control signal delayed by one pulse frame to the undelayed second control signal and generates a synchronizing signal. A time slot generator produces enabling signals by means of counting subsequent system clock pulses under control of this synchronizing signal such that during receiving of different data words of a frame a respective one of the enabling signals is present.

REFERENCES:
patent: 2927965 (1960-03-01), Waer
patent: 3576947 (1971-05-01), Kruger
patent: 3987251 (1976-10-01), Texier et al.
patent: 4002846 (1977-01-01), Barbier
patent: 4132867 (1979-01-01), Siglow

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