C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1206, 400/13
C08L 67/06 (2006.01) B32B 15/08 (2006.01) B32B 27/08 (2006.01) C08K 13/04 (2006.01) C09K 3/12 (2006.01)
Patent
CA 1184687
ABSTRACT OF THE DISCLOSURE In a switching network in matrix form for gathering 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 a intersection area, control and/or shielding conductors surrounding the lines, and metal shields enclosing the planes; a crosspoint array module 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 module, 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.
377489
Connolly Joseph D.
Iseler Kenneth A.
Shah Mayur S.
Budd Company (the)
Fetherstonhaugh & Co.
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