Digital two-to-four wire converter for full duplex signals

Details Digital two-to-four wire converter for full duplex signals Digital two-to-four wire converter for full duplex signals

1980-10-23

1983-03-22

Brigance, Gerald L.

Multiplex communications

Wide area network

Packet switching

179170NC, 375 14, H04B 158

Patent

active

043778585

ABSTRACT:
A digital electronic hybrid circuit for a telephone line circuit is described wherein the two-to-four wire conversion function is provided with an improved synthesized automatic impedance match between the telephone subscriber line and the digital central office. More particularly, an impedance at the input to the line circuit is simulated without the use of discrete components and which closely matches the subscriber line impedance. The circuit digitally separates the full duplex signals on a two-wire transmission path to a pair of digital signals.

REFERENCES:
patent: 4174470 (1979-11-01), Seidel
patent: 4196405 (1980-04-01), Le Dily et al.
patent: 4273963 (1981-06-01), Seidel
patent: 4320498 (1982-03-01), Justice

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