Apparatus for sensing, transmitting and displaying signal states

Details Apparatus for sensing, transmitting and displaying signal states Apparatus for sensing, transmitting and displaying signal states

1975-11-18

1977-07-19

Traeton, David L.

Communications: electrical

Digital comparator systems

179 15AL, 340183, 340413, H04J 300

Patent

active

040371999

ABSTRACT:
Apparatus for sensing, communicating and displaying signal states in a multiplicity of functional units is described. A signal multiplexer is assigned to each given functional unit; the multiplexer inputs are connected to signal lines carrying the signal states of the functional unit. The outputs of the signal multiplexers are connected by time division multiplex (TDM) trunks to a group multiplexer. A multiplexer control applies first encoded selection signals to the signal multiplexers for selection of signal lines at the signal multiplexers. The selected signaling lines are interrogated, and the signal states are transmitted timewise in parallel with the signal states of other functional units over the corresponding TDM trunks to the group multiplexer. The multiplexer control applies second encoded selection signals to the group multiplexer for connecting the TDM trunks to group TDM trunks throughout the duration of a sampling phase. At the display location, a shift register receives the signal states from the group TDM trunks. The clock pulse coupled to the shift register is interrupted upon acceptance of signal states sent from a functional unit for the duration of a display phase.

REFERENCES:
patent: 2899567 (1959-08-01), Romano
patent: 3145374 (1964-08-01), Benner et al.
patent: 3248650 (1966-04-01), Bialkowski et al.
patent: 3293605 (1966-12-01), Moore
patent: 3735396 (1973-05-01), Getchell
patent: 3812487 (1974-05-01), Burton
patent: 3909788 (1975-09-01), Kaelin et al.

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