Broadband switching network in matrix form

Details Broadband switching network in matrix form Broadband switching network in matrix form

1984-12-31

1986-12-16

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082592, 330104, 370 58, H04Q 900, H04J 302

Patent

active

046300465

ABSTRACT:
A broadband switching network in matrix form composed of a plurality of rows and a plurality of columns, and including a plurality of crosspoint switching circuits each having an input and an output and each associated with a respective row and a respective column; a plurality of input circuits each associated with a respective row and connected to the input of each switching circuit associated with the respective row; and a plurality of output circuits each associated with a respective column and connected to the output of each switching circuit associated with the respective column. Each crosspoint switching circuit includes a transistor connected in common emitter configuration and control elements connected for applying to the emitter of the transistor a potential controlling the switching state of the crosspoint switching circuit and each input circuit and output circuit is a decoupling circuit. The network further includes a plurality of load resistors each associated with a respective column and each connected to that output circuit which is associated with the respective column, and a plurality of self-blocking stages each including a transistor connected in common base configuration and each connected in series between the output of at least one switching circuit and that load resistor which is associated with the same column as the at least one switching circuit.

REFERENCES:
patent: Re28224 (1974-11-01), Metcalf
patent: 3550087 (1970-12-01), Ross
patent: 4331950 (1982-05-01), Barabas
patent: 4346381 (1982-08-01), Bauch et al.
patent: 4443773 (1984-04-01), Rall et al.
patent: 4446552 (1984-05-01), Tweedy
patent: 4516238 (1985-05-01), Huang et al.

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