1977-10-25
1978-12-05
Robinson, Thomas A.
357 45, H04Q 152
Patent
active
041287410
ABSTRACT:
A cross-point array for telecommunication systems, produced as an xy-matrix in a monolithic substrate with switching means arranged at the cross-points between the x and y conductors in the form of transistors controllable to assume an "on" state with a low impedance and an "off" state with a high impedance, the transistors having their collector-emitter path connected between the x and y conductors and supplied with current from a constant-current generator, is improved by having the collector-base diode of each transistor connected in parallel with a Schottky-diode supplied with current from a second constant-current generator and operating in its forward direction in the "on" state, whereby cross-talk caused by a parasitic transistor function is inhibited between the cross-points in the substrate.
REFERENCES:
patent: 3692949 (1972-09-01), Jovic
patent: 3913213 (1975-10-01), Mills et al.
patent: 3922565 (1975-11-01), Berger et al.
patent: 3995307 (1976-11-01), Alcorn et al.
Robinson Thomas A.
Telefonaktiebolaget L M Ericsson
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