Digital data generation system including programmable dominance

Details Digital data generation system including programmable dominance Digital data generation system including programmable dominance

1992-03-02

1994-07-26

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

307269, 307289, H04L 700

Patent

active

053331540

ABSTRACT:
A digital data generation system including a programmable dominance RS flip-flop has a random access memory that stores a user selected sequence of test data. A pattern formatting logic circuit receives the test data and produces, for each data period, a coarsely timed candidate pulse for identifying the leading edge of an output data pulse and a coarsely timed candidate pulse for identifying the trailing edge of the output data pulse. A precision delay circuit finely tunes the timing of the candidate pulses. The finely tuned pulses are applied to an RS flip-flop circuit which can be programmed for set or reset dominance, thereby preventing an indeterminate state when a logic "1" is applied to both the set and the reset input. In the system, the flip-flop is programmed so that the most recent of the lead pulse or the trail pulse prevails.

REFERENCES:
patent: 3883756 (1975-05-01), Dragon
patent: 4680479 (1987-07-01), Alonso
patent: 5208598 (1993-05-01), Lueker et al.
patent: 5233589 (1993-08-01), Saito et al.

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