Logic network for programmable data concentrator

Details Logic network for programmable data concentrator Logic network for programmable data concentrator

1975-04-04

1977-02-22

Yusko, Donald J.

Communications: electrical

Digital comparator systems

179 18FC, 307243, 340147LP, H04Q 300, H04J 300

Patent

active

040094685

ABSTRACT:
For the selective energization of combinations of up to m data outputs of a data concentrator with n data inputs (n > m), the concentrator is provided with n control inputs energizable in various patterns. The concentrator comprises a logic network with an enabling section and a performing section, each in the form of a truncated orthogonal matrix with m rows and n columns of gating circuits. In each matrix the number of gating circuits decreases from n in the first row to (n-m+1) in the last row. The gating circuits of each column of the enabling matrix are connected in parallel to a respective control input whose energization gives rise to an internal activation signal in one of these circuits and simultaneously blocks the circuits of the same row while unblocking those on a diagonal for possible activation by the energization of one of the following control inputs; thus, only one activation signal can come from any row and the number of such activation signals -- up to m -- depends on the number of energized control inputs. The gating circuits of the performing section consist each of a coincidence (NAND or AND) gate connected on the one hand to an output terminal of the corresponding circuit of the enabling matrix and on the other hand to a data input, the gates of each column being connected to the same data input in parallel; the gates of each row work into a common summing circuit (NAND or OR gate) energizing a respective data output if an activation signal is applied to a gating circuit of that row connected to an energized data input.

REFERENCES:
patent: 3311705 (1967-03-01), Le Corre et al.
patent: 3400224 (1968-09-01), Heitmann
patent: 3573388 (1971-04-01), Dagnall, Jr.
patent: 3657470 (1972-04-01), Sarati et al.
patent: 3700819 (1972-10-01), Marcus
patent: 3819869 (1974-06-01), Lamartina et al.
patent: 3885167 (1975-05-01), Berglund

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