Broadband signal switching equipment

Details Broadband signal switching equipment Broadband signal switching equipment

1987-06-16

1989-06-13

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

With meter reading

34082589, 379292, 307241, 307530, H04Q 900

Patent

active

048396435

ABSTRACT:
Switches having a relatively high forward resistance are provided in a broadband signal switching equipment comprising a crosspoint matrix constructed in field effect transistor technology and provided with input drivers and output amplifiers. The output amplifiers respectively comprise an iterative network of a hysteresis-affected comparator and a D flip-flop, as well as a holding memory and a switch by way of which the holding memory is reloaded in a respective primary phase of a bit switching time interval. The reloading occurs at least approximately to the potential momentarily prevailing on the output line section leading away from the switch, this potential then continuing to be maintained at the second comparator input in the following switching phase.

REFERENCES:
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patent: 3980831 (1976-09-01), Mertel
patent: 3983049 (1976-02-01), Acker et al.
patent: 4287441 (1981-09-01), Smith
patent: 4434381 (1984-02-01), Stewart
patent: 4571514 (1986-02-01), Nelson et al.
patent: 4588905 (1986-05-01), Kojima
patent: 4745409 (1988-05-01), Hofmann
patent: 4746921 (1988-05-01), Hofmann
patent: 4785299 (1988-11-01), Trumpp
"Arbeitsgeschwindigkeitsgrenzen von Koppelnetzwerken fuer Breitband-Digitalsignale", DISS., Braunschweig, 1978, FIGS. 6.1-6.7.
"Switching Matrix Delivers 100 Mb/s", Electronics, Dec. 15, 1983, pp. 88-89.
Sanazawa et al., "Wideband Integrated Crosspoint Switch Matrix", Review of the Electrical Communication Laboratories, vol. 25, No. 1-2, pp. 43-51, Jan.-Feb., 1977.

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