Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1982-01-21
1984-04-17
Gensler, Paul L.
Wave transmission lines and networks
Plural channel systems
Having branched circuits
307491, 330 51, 34082589, 34082593, H01P 115, H04Q 300
Patent
active
044437730
ABSTRACT:
In a switching network in matrix form for megahertz frequency signals, including: a multilayer printed circuit board having a plurality of row signal lines located in a first plane, a plurality of column signal lines located in a second plane and extending transverse to the row lines, the row and column signal lines intersecting one another in an intersection area, control and/or shielding conductors surrounding the lines, and metal shields enclosing the planes; a crosspoint array integrated on a chip and providing a plurality of crosspoints for the intersection area, each crosspoint presenting two semiconductor switches arranged to couple a respective column signal line to a respective row signal line; and a shielded package enclosing the chip, each line is constituted by a balanced pair of stripline conductors and is terminated at each end by its characteristic impedance. Between two signal conductor pairs in a plane there are control or power-supply conductors which are grounded for high frequencies for shielding purposes. Each crosspoint includes a balanced amplifier having two amplifying paths with internal neutralization of crosstalk via additional non-operating transistors, and high impedance input and output circuits connecting the amplifier between its row and column lines, and the module is connected to the circuit board via plug-in socket elements fastened to the circuit board and mating plug connector pins fastened to the shielded package.
REFERENCES:
patent: 3789151 (1974-01-01), Richards
patent: 4128742 (1978-12-01), Davis
patent: 4346381 (1982-08-01), Bauch et al.
Rall et al, "Bildfernsprechkoppelfeld mit integrierten Halbleiterkoppelpunkten" Nachrichtentechnische Zeitschrift vol. 33, Sep. 1980 pp. 602-607.
Welzenbach et al. "Der Einsatz von optischen Systememn in Breitbandverteilanlagen" Wiss. Ber AEG-Telefunken 53 (1980) pp. 62-71.
Beuss et al., "TN-Fernsprechsystem 6030 Zeitmultiplex mit farbtuchtigem electronischen Videokoppelfeld" Telefonbau und Normalzeit, (1980) Heft 82, pp. 1 through 8.
Burkhart Johann
Rall Bernhard
Schluter Klaus
Gensler Paul L.
Licentia Patent-Verwaltungs-GmbH
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