Digital data communication apparatus

Details Digital data communication apparatus Digital data communication apparatus

1983-09-12

1987-03-31

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

340318, 340501, 370 82, 375117, 455 68, H04L 700

Patent

active

046546537

ABSTRACT:
An asynchronous one way digital data communication system is disclosed in which a first microcomputer produces a series of groups of pulses at a first port representative of digits in an information packet to be transmitted, the groups being separated by strobe pulses at a second port. The pulses drive switches in two current paths to control current therethrough supplied by a receiver module including a second microcomputer having a serial input port connected to an internal counter and an interrupt port. Current detectors supply pulses corresponding to currents in the paths to the serial input and interrupt ports, from which the second microcomputer reproduces the information packet.

REFERENCES:
patent: 3257644 (1966-06-01), Moore
patent: 4175238 (1979-11-01), Breimesser et al.
patent: 4215276 (1980-07-01), Janeway
patent: 4240077 (1980-12-01), Hughes et al.
Ryan, Ray, "Basic Digital Electronics", Tab Books, Blue Ridge Summit, Pa., 1975, pp. 54, 55.

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