Switcher for redundant signal transmission system

Details Switcher for redundant signal transmission system Switcher for redundant signal transmission system

1992-06-02

1994-11-29

Beausoliel, Jr., Robert W.

Excavating

371 112, 371 201, G06F 1100

Patent

active

053696425

ABSTRACT:
A switcher applicable to a redundant signal transmission system and capable of maintaining impedance matching when an input line associated with a faulty active transmitter is connected to a standby transmitter. The switcher may have first switching circuit assigned to the standby transmitter, a plurality of second switching circuits associated one-to-one with a plurality of active transmitters, and a pair of connection lines cascading the first and second switching circuits. When a faulty active transmitter is replaced with the standby transmitter, relay switches constituting the first and second switching circuits disconnect portions of the connection lines which are more remote, from the first switching circuit than the second switching circuit means associated with the faulty active transmitter.

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patent: 4075440 (1978-02-01), Laubengayer
patent: 4320508 (1982-03-01), Takezoe
patent: 4797903 (1989-01-01), Itoh
patent: 4922449 (1990-05-01), Donaldson et al.
patent: 4984252 (1991-01-01), Morimoto
patent: 5057938 (1991-10-01), Edamura
patent: 5097467 (1992-03-01), Taniguchi

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