Three stage switching apparatus

Details Three stage switching apparatus Three stage switching apparatus

1988-04-08

1990-11-13

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082501, 340827, H04Q 100

Patent

active

049705059

ABSTRACT:
A three stage switching apparatus freely connects N input terminals and N output terminals and includes a first stage, a second stage, a third stage, and a connecting circuit. The first stage is constituted by at least N
first matrix switches. The second stage is constituted by at least 2n-1 second matrix switches. The third stage is constituted by at least N
third matrix switches. The connecting circuit connects the input terminals and the first stage, the first stage and the second stage, the second stage and the third stage, and the third stage and the output terminals such that the number of paths connecting an arbitrary one of the input terminals and an arbitrary one of the output terminals is 2n.

REFERENCES:
patent: 4400627 (1983-08-01), Zola
patent: 4536870 (1985-08-01), Bovo et al.
patent: 4654842 (1987-03-01), Coraluppi et al.
patent: 4807280 (1989-02-01), Posner et al.
patent: 4811333 (1989-03-01), Rees
Bell System Technical Journal vol. 32, No. 2, pp. 406-424, "A Study of Non-Blocking Switching Networks", Mar. 1953.

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