Control means for a solid state crossbar switch

Details Control means for a solid state crossbar switch Control means for a solid state crossbar switch

1980-09-29

1982-05-25

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

179 18GF, 370 67, H04Q 900, H04Q 342

Patent

active

043319564

ABSTRACT:
A control system for a solid state crossbar switch (10) which allows a plurality of switch control and interrogation functions to be implemented by time sharing related circuitry. The crossbar switch (10) includes a plurality of X ports (X.sub.1 -X.sub.N) and Y ports (Y.sub.1 -Y.sub.M), each X-Y port intersection designating a specific X-Y intersection latch which controls a plurality of associated switches for interconnecting one set of data lines associated with the X port to another set of data lines associated with the Y port. The control system disclosed continuously and sequentially addresses each of the X-Y intersection latches at a 10 megahertz rate. During this continual and sequential addressing, the control circuitry disclosed includes a capability for interrogating each intersection latch for determining which are in a set condition, ensuring that only one X-Y intersection latch is set on an X row and Y column defining that latch, resetting all of the X-Y intersection latches, and determining which of the X-Y intersection latches are in a set condition.

REFERENCES:
patent: 4024352 (1977-05-01), Mukaemachi et al.
patent: 4075608 (1978-02-01), Koenig
patent: 4095055 (1978-06-01), Gotoh et al.

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