Switcher for flexibly interconnecting communication ports

Details Switcher for flexibly interconnecting communication ports Switcher for flexibly interconnecting communication ports

1997-10-17

1999-08-03

Pham, Chi H.

Pulse or digital communications

Transceivers

34082503, 370380, H04B 140, H04L 2502, H04L 1202

Patent

active

059334495

ABSTRACT:
A transceiver includes a first receiver having an input connected to a first I/O port of the transceiver and an output connected to an output port of the transceiver and a second receiver having an input connected to a second I/O port of the transceiver and an output connected to the output port of the transceiver. A first driver has an input connected to an input port of the transceiver and an output connected to the first I/O port, and a second driver has an input connected to the input port of the transceiver and an output connected to the second I/O port. The transceiver has a first state in which the first receiver and second driver are enabled and propagate signals from the first I/O port to the output port and from the input port to the second I/O port and the second receiver is disabled and presents a high impedance to the output port, and a second state in which the second receiver and first driver are enabled and propagate signals from the second I/O port to the output port and from the input port to the first I/O port and the first receiver is disabled and presents a high impedance to the output port.

REFERENCES:
patent: 4736394 (1988-04-01), Giovannelli et al.
patent: 5088112 (1992-02-01), Pyhalammi et al.
patent: 5118974 (1992-06-01), Yarbrough et al.
patent: 5345288 (1994-09-01), Franaszek et al.
patent: 5530434 (1996-06-01), Kanda

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