H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/1, 363/10, 3
H04Q 11/04 (2006.01) G08C 15/12 (2006.01)
Patent
CA 1052483
ABSTRACT OF THE DISCLOSURE 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 en- coded 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 time- wise 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 dis- play 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.
239071
Rozehnal Gunther
Wedler Hartmut
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