Timed pulse communication system

Details Timed pulse communication system Timed pulse communication system

1983-08-15

1986-04-22

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

332 9R, 340353, 340365S, 329106, H03K 708

Patent

active

045846910

ABSTRACT:
A modulator and demodulator is described for a carrier frequency which is modulated by continuous pulses of different lengths time-wise, as many different lengths being provided as the number of letters, numbers, signs or even words require. The pulse generator comprises a stable oscillator and cycle counters which are controlled by a typewriter-type keyboard. The counters count cycles corresponding in aggregate duration to selected characters. Continuous pulses of duration equal to the aggregate durations of the counted cycles are generated in response to those counters. The receiver comprises a stable oscillator identical with that of the pulse generator, which is gated by the modulated carrier frequency. Cycle counters count the cycles in the gated pulses, and a read-only memory and display transform the counts into characters.

REFERENCES:
patent: 2345987 (1944-04-01), Neiswinter
patent: 3699254 (1972-10-01), Nailen
patent: 3781874 (1973-12-01), Jennings
patent: 3845473 (1974-10-01), Kawashima
patent: 3944982 (1976-03-01), Mogi et al.
patent: 3949199 (1976-04-01), Odom
patent: 3980960 (1976-09-01), Hutchinson
patent: 3983325 (1976-09-01), llinger et al.
patent: 4188581 (1980-02-01), Stevenson
patent: 4189713 (1980-02-01), Duffy

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