Multi-stage switching network controlled by at least three logic

Details Multi-stage switching network controlled by at least three logic Multi-stage switching network controlled by at least three logic

1979-03-02

1981-04-28

Yusko, Donald J.

Communications: electrical

Digital comparator systems

179 18GF, H04Q 900, H03Q 350

Patent

active

042648955

ABSTRACT:
A multi-stage switching network comprises a plurality of unitary switch matrices each including a number of cross-point circuits each of which in turn includes a memory circuit operatively connected to the associated cross-point switches in a speech path. The plurality of the unitary switch matrices are arranged in a matrix array in which each stage of the multi-stage switching network is constituted by the unitary switch matrices arrayed in at least one column thereof and interconnected through links. The memory circuit for performing ON/OFF control of the associated cross-point switches in each of the switch matrices incorporates therein at least three logical control signal input terminals to which at least an information signal for designating the switch matrix to be selected and information signals for designating a row and a column in the selected switch matrix are applied, the latter information signals being produced in common to all the switch matrices, whereby a given cross-point determined by these information signals in the selected matrix is selected and correspondingly controlled. The ON/OFF control of the cross-point switch is effected sequentially by a stage selecting information signal from stage to stage.

REFERENCES:
patent: 3609661 (1971-09-01), Hennes et al.
patent: 3832495 (1974-08-01), Hovagimyan et al.
patent: 3936612 (1976-02-01), Hjortendal et al.
patent: 4031413 (1977-06-01), Ohhinata et al.
patent: 4068215 (1978-01-01), Mukaemachi et al.

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