Abstract: A flip-flop is arranged to be set by a first comparator and reset by a second comparitor. A first capacitor and a first resistor are connected between the input terminals of the circuit with the first comparator connected across the first resistor and the second comparator connected across the second resistor. The flip-flop is set and reset with time delays determined by the charging times of their respective associated capacitors. No external bias supply is required.

Abstract: The recurring time slots in each line of a time division multiplex communication system are identified by a unique combination of phase relationships among a plurality of synchronization signals. Each of a plurality of terminators sends and receives samples of input and output data to and from an information path consisting of a bundle of discrete lines or buses. Any particular connection involves only on a selected line or lines and is gated to appropriate terminators only during recurring preselected time slots and only via a selected line or lines. Time slots are identified by a unique combination of phase relationships occuring in a separate synchronization path.

Abstract: Each recurring time slot of a time division multiplex communication system is identified by a comparator in a terminator unit, using the unique combination of phase relationships among a plurality of synchronization signals. The comparator is latched during the appropriate time slot by a supervision bus signal. Each of a plurality of terminators sends and receives samples of data input and output to and from an information path consisting of a bundle of discrete lines or buses. Communication between a particular terminator and a particular line of the information path is gated only during a recurring preselected time slot. A particular terminator selects samples sequentially from each successive line of the information path. These samples are then added together to reconstitute the signal. Samples of outgoing signals are similarly distributed over a plurality of lines in sequence.