Data selecting and synchronizing circuit comprising plural gates and flipflops interconnecting data handling systems

Claim 1

A SYNCHRONIZER CIRCUIT FOR PASSING A UNIQUE CODE SIGNAL BETWEEN TWO DATA PROCESSING SYSTEMS COMPRISING IN COMBINATION, MEANS FOR RECEIVING SERIAL INFORMATION CONTAINING A UNIQUE CODE SIGNAL FROM ONE OF SAID DATA PROCESSING SYSTEMS, MEANS FOR RECEIVING A PAIR OF PREDETERMINED TIMING SIGNALS FROM THE OTHER OF SAID DATA PROCESSING SYSTEMS, MEANS CONNECTED TO SAID SERIAL INFORMATION RECEIVING MEANS FOR SELECTING AND SEPARATING SAID UNIQUE CODE SIGNAL FROM SAID SERIAL INFORMATION INCLUDING A BISTABLE MULTIVIBRATOR, SAID MULTIVIBRATOR HAVING A FIRST HALF RESPONSIVE ONLY TO SAID PAIR OF PREDETERMINED TIMING SIGNALS FOR SEQUENTIALLY CHANGING THE STATE THEREOF, SAID MULTIVIBRATOR HAVING AN OUTPUT PROPORTIONAL TO AND REPRESENTATIVE OF SAID UNIQUE CODE SIGNAL WHEN SAID FIRST HALF IS IN A CONDUCTIVE STATE, AND GATE MEANS CONNECTED TO SAID MULTIVIBRATOR RESPONSIVE TO BOTH SAID UNIQUE CODE SIGNAL AND THE OTHER OF SAID PAIR OF PREDETERMINED TIMING SIGNALS FOR PASSING SAID UNIQUE CODE SIGNAL WHEN SAID UNIQUE CODE SIGNAL AND THE OTHER OF SAID PAIR OF PREDETERMINED TIMING SIGNALS ARE SIMULTANEOUSLY RECEIVED THEREBY, MEANS INTERCONNECTING SAID SERIAL INFORMATION RECEIVING MEANS AND SAID SELECTING AND SEPARATING MEANS FOR POSITIONING SAID UNIQUE CODE SIGNAL WITH SAID PAIR OF PREDETERMINED TIMING SIGNALS IN A PREDETERMINED RELATIVE PHASE RELATIONSHIP, AND MEANS COUPLED TO SAID POSITIONING MEANS FOR CONVEYING SAID PHASE RELATED UNIQUE CODE SIGNAL TO THE AFORESAID OTHER DATA PROCESSING SYSTEM.